When settling in Portugal, a new language inevitably comes into play, despite English being familiar to most and widely spoken.
NIF. NISS. AIMA. IRS. IMT. IMI. Modelo 3. Annex J. CPCV. CAE, ...
You’ll repeatedly come across these and many other related terms when applying for residence, paying taxes, buying a home, opening a business or simply navigating Portugal’s administrative and tax system. .
Their meaning and implications are, at times, far from obvious even to those who have lived here for years, let alone to newcomers. This guide walks you through the essentials: what these terms stand for and, more importantly, why they matter.
Disclaimer: This article is intended for general information purposes only and does not constitute legal, tax or immigration advice. Rules, requirements and procedures may change over time, and their application depends on individual circumstances. We recommend checking the latest official information and seeking professional advice before making any decisions.
Pre-Move: Key Portuguese IDs
NIF
PT: Número de Identificação Fiscal.
EN: Portuguese Tax Tdentification Number.
A nine-digit number that identifies you before the Portuguese Tax and Customs Authority.
Foreign nationals can obtain a NIF regardless of their residence status. Bear in mind that non-Portuguese tax residents from outside the EU/EEA are, as a rule, required to appoint a tax representative, unless they opt in to electronic notifications.
A common misconception: Having a NIF makes you a Portuguese tax resident.
The much-needed clarification: A NIF alone says nothing about your tax residence. What matters is the address registered under it, which determines your status with the Portuguese Tax and Customs Authority as a resident or a non-resident.
Why it matters
For many people planning a move to Portugal, obtaining a NIF is one of the first administrative steps.
In practice, it is crucial in almost every practical aspect of day-to-day life, You are likely to need a NIF for many practical matters, whether signing an including employment or lease, contracts, opening a certain bank accounts, buying property or and dealing complying with Portuguese tax obligations, such as filing returns or paying taxes.
NISS
PT: Número de Identificação da Segurança Social.
EN: Portuguese Social Security Identification Number.
Although the NISS is often mentioned together with the NIF, each serves a distinct purpose.
While your NIF is primarily connected with taxation, your NISS is connected with Portugal’s public Social Security system (“Segurança Social” / “SS”).
If you work or become self-employed in Portugal, your NISS may become particularly relevant. Exceptions apply, for instance, to lawyers, who contribute to their own professional scheme, or to workers posted from abroad who remain covered by their home country's system.
Why it matters
Your NISS enables access to benefits such as sickness, parental and unemployment support and, eventually, a pension, subject to your compliance with Social Security obligations, namely paying contributions
Número de Utente
PT: Número Nacional de Utente
EN: National Healthcare User Number
Your identification number within Portugal's public healthcare system (Serviço Nacional de Saúde / “SNS”).
Since March 2025, eligible foreign nationals with an address in Portugal can request their tax number (NIF), social security number (NISS) and National Health Service user number (Número de Utente) in a single appointment at selected Espaços Cidadão (Citizen Spaces).
Why it matters
Needed to register with a public health centre (“centro de saúde”) and use SNS services, including hospitals, prescriptions and vaccinations.
Portuguese Government Services You Will Hear About
AIMA
PT: Agência para a Integração, Migrações e Asilo.
EN: Agency for Integration, Migration and Asylum
AIMA is the Portuguese public agency responsible for migration-related matters, including residence permits, family reunification, the integration of migrants, and international protection and asylum. It replaced the former Immigration and Borders Service (“Serviço de Estrangeiros e Fronteiras” / “SEF”) in October 2023.
Why it matters
If you are a non-EU national moving to Portugal, AIMA will be your main point of contact throughout your residence process, from your first residence permit to every renewal
AT
PT: Autoridade Tributária e Aduaneira.
EN: Portuguese Tax and Customs Authority.
AT, commonly referred to as Finanças, is the Portuguese public authority responsible for assessing and collecting taxes and for customs matters. It deals with both individuals and companies through its local offices (“Serviços de Finanças”) and online through the Finance Portal (“Portal das Finanças, where most procedures can be completed.
Why it matters
On the tax side, AT is the authority you will deal with for your tax obligations in Portugal, from, among many others, filing your annual personal or corporate income tax return (IRS / IRC) to paying property taxes (IMI, IMT) and vehicle tax (IUC). It is also where you obtain official proof of your tax status, such as a tax residence certificate or a certificate of no tax debt (“certidão de dívida e não dívida”), often requested by banks, landlords and other entities.
On the customs side, AT is the authority involved when you bring goods into Portugal from outside the EU. This includes shipping your household belongings or importing a vehicle when relocating, both of which may qualify for tax relief under the rules on transfer of residence, as well as purchases and parcels from outside the EU, which may, in principle, be subject to VAT and customs duties.
Portal das Finanças
EN: Finance Portal
The Portal das Finanças is the AT’s online platform used by taxpayers to manage their Portuguese tax affairs and communicate with AT, including tax details, annual tax return, tax assessments, property taxes, invoices and certain tax benefits.
To access it, you will need a password (senha de acesso), which is sent by post to the address registered under your NIF. You can also log in with a Portuguese Citizen Card or the Digital Mobile Key (Chave Móvel Digital).
Why it matters
If you become a tax resident, own property, work or run a business in Portugal, you will probably use the Portal das Finanças regularly. Requesting your password early is advisable, as it may take some time to arrive, especially if your registered address is outside Portugal.
Segurança Social Direta
EN: Social Security Direct
Segurança Social Direta is the online platform of Portuguese Social Security Institute (“Instituto da Segurança Social” / “ISS”), used by individuals, independent professionals, employers and businesses to manage their Social Security matters.
Why it matters
If you work or run a business in Portugal, this online platform is likely to become as important as the Portal das Finanças. It is where you check your contribution record, pay contributions, apply for benefits such as sickness, parental or unemployment benefits, and obtain official documents, such as a certificate confirming that your contributions are up to date (declaração de situação contributiva regularizada).
Independent workers (trabalhadores independentes) must also submit quarterly income declarations through it, which determine the amount of their monthly contributions, while employers use it to register new employees and submit monthly salary declarations.
CMD
PT: Chave Móvel Digital
EN: Digital Mobile Key
Portugal's digital authentication system, linking your identity to your mobile phone number. You log in with a PIN and a code sent to your phone, and can also use it to sign documents digitally.
Foreign nationals can activate it, free of charge, with a passport or a Portuguese residence permit (the latter requires a Portuguese NIF), generally in person at an Espaço Cidadão or Loja do Cidadão, or at a Portuguese consulate if living abroad.
Why it matters
It can make dealing with Portuguese government services much easier once you are living in Portugal, giving you a single login for the main public services online, including the Portal das Finanças, Segurança Social Direta and the SNS 24 app, so you no longer need separate passwords sent by post.
Portuguese Tax Terms
IRS
PT: Imposto sobre o Rendimento das Pessoas Singulares.
EN: Portuguese Personal Income Tax.
IRS is the Portuguese tax on the income of individuals, covering employment and self-employment income, pensions, rental income, investment income and capital gains. Depending on the type of income and the taxpayer's residence status, it may be subject to progressive rates or to special flat rates.
Why it matters
Portuguese tax residents are generally taxed on their worldwide income. This means that income received abroad must, as a rule, be declared in your Portuguese tax return, together with any tax paid abroad on it and, where relevant, foreign social security contributions. Foreign bank accounts must also be disclosed, while any applicable double taxation treaty may prevent the same income from being taxed twice.
Non-residents for Portuguese tax purposes, on the other hand, are generally taxed only on their Portuguese-source income.
Modelo 3
PT: Declaração de Rendimentos Modelo 3 de IRS
EN: IRS Return Form 3
Modelo 3 is the official form used to file the annual IRS return. It covers the income received in a calendar year and is submitted through the Portal das Finanças between 1 April and 30 June of the following year.
The return is made up of a main form (“rosto”), where the taxpayer and household are identified, together with different annexes (“anexos”) depending on the taxpayer's income received and circumstances.
For taxpayers with simpler situations, AT may make an automatic return (IRS Automático) available, pre-filled on the basis of the information it already holds, which the taxpayer only needs to review and confirm.
Why it matters
While IRS is the tax, Modelo 3 is the return through which it is assessed. Completing it correctly, with all the relevant annexes, is essential: omissions or errors may result in additional tax, interest and penalties.
Anexo J
EN: Annex J
The section of the Portuguese personal income tax return where Portuguese tax residents report income obtained abroad.
It covers different categories of foreign income, including employment income, pensions, business and professional income, rental income, interest, dividends and certain capital gains.
Tax residents must also identify bank and securities accounts held outside Portugal.
Why it matters
For expats who continue to receive income or hold accounts abroad, Annex J is often the the most important part of the IRS return. Even income that is exempt in Portugal, for instance under the IFICI regime, must generally still be reported, and failing to do so may result in penalties.
Residência Fiscal
EN: Tax Residence
The main legal criterion under Portuguese law that determines whether, and to what extent, Portugal taxes you.
One of the main Portuguese tests is spending more than 183 days in Portugal during a relevant 12-month period.
But the 183-day rule is not the only test.
A person who spends less time in Portugal can still become tax resident if they maintain a home here in circumstances showing an intention to keep and occupy it as their habitual residence.
In the year you move, you are usually taxed as a resident only from the day you arrive, and as a non-resident before that.
Why it matters
Tax residence and immigration residence are not the same thing.
Holding a Portuguese residence permit does not, by itself, make you a tax resident, nor does simply obtaining a NIF.
Rendimentos Mundiais
EN: Worldwide Income
lAs a Portuguese tax resident, all your income, whether obtained in Portugal or abroad, is in principle subject to Portuguese tax and must generally be reported in your Portuguese tax return.
Why it matters
Becoming a Portuguese tax resident may affect how your salary, pensions, dividends, investments, rental income and other foreign income are taxed and reported, without prejudice to any reduction or elimination of Portuguese tax under double tax treaties or, where applicable, special regimes such as IFICI.
e-Fatura
EN: e-Invoice Portugal
The Tax and Customs Authority's online platform where invoices issued with your NIF are recorded and classified.
Certain expenses, such as in health, education, housing and general household, can contribute to deductions when your Portuguese personal income tax is assessed.
Why it matters
Invoices that are not automatically classified must be reviewed and validated by the annual deadline, usually in February, or the corresponding deductions may be lost. Always asking for invoices with your NIF is the simplest way to make sure your expenses count.
IVA
PT: Imposto sobre o Valor Acrescentado.
EN: Value Added Tax (VAT)
The tax charged on the supply of most goods and services in Portugal. The standard rate is 23% on the Mainland, while an intermediate rate of 13% and a reduced rate of 6% apply in certain cases.
Madeira and the Azores apply lower rates.
Why it matters
IVA can become important if you start working as an independent professional, freelancer or set up a business in Portugal.
Whether you need to charge it on your invoices and file periodic IVA returns depends on your activity, client’s locations and other applicable rules.
IRC
PT: Imposto sobre o Rendimento das Pessoas Coletivas.
EN: Portuguese Corporate Income Tax.
The tax levied on the profits of companies and other legal entities. On the mainland, the standard IRC rate is 19% in 2026, falling to 18% in 2027 and 17% from 2028. Small and medium-sized enterprises benefit from a reduced rate of 15% on the first €50,000 of taxable profit. Municipal and state surcharges may also apply.
Why it matters
If you incorporate a Portuguese company, it becomes a separate taxpayer with its own obligations, and its profits are taxed at company level under the IRC rules. Any profits later distributed to you as dividends will, as a rule, also be subject to IRS.
An exception applies to certain entities subject to tax transparency, such as some professional services companies, whose profits are not taxed at company level but attributed directly to their partners and taxed under IRS.
IFICI
PT: Incentivo Fiscal à Investigação Científica e Inovação.
EN: Tax Incentive for Scientific Research and Innovation
It is a Portuguese tax incentive designed to attract qualifying individuals carrying out certain eligible activities, such as research, higher education teaching or highly qualified roles in qualifying companies.For ten years, eligible income from those activities is taxed at a flat 20% rate, and most foreign-source income is exempt. To qualify, you must become a Portuguese tax resident, not have been a tax resident in Portugal in the previous five years, and carry out an activity covered by the regime.
IFICI is often referred to as “NHR 2.0”, due to its partial similarity with the former NHR regime, now closed to new applicants, although this is not its official name.
Why it matters
Moving to Portugal does not automatically make you eligible for IFICI.
Prevention is key: your activity, the entity you work for and the remaining requirements should be analysed before you move.
On the substantive side, you must carry out an eligible activity, such as working for a qualifying entity, by the time you become a Portuguese tax resident, and must not have been a tax resident in Portugal in the previous five years. These requirements must then continue to be met in each year you wish to benefit.
On the formal side, registration must be requested by 15 January of the year following the year in which you become a tax resident to fully benefit from the 10-year period.
RNH / NHR
PT: Residente Não Habitual.
EN: Non-Habitual Resident.
Portugal's former special tax regime for new Portuguese tax residents.
The NHR framework is now closed to new applicants and it was subject to specific transitional situations. Those already registered continue to benefit from it for the remainder of their ten-year period.
Why it matters
Much of the online content about moving to Portugal still refers to the NHR regime. If you are moving now, those rules will not apply to you.
Your reference point is IFICI, a different regime with different eligibility conditions.
CDT / DTA
PT: Convenção para Evitar a Dupla Tributação
EN: Double Taxation Agreement
An agreement between two countries that sets out which of them may tax each type of income and how double taxation is relieved. Portugal has signed such treaties with a large number of countries, most of them largely based on a common framework: the Model Tax Convention on Income and on Capital of the Organisation for Economic Co-operation and Development (the "OECD Model").
Why it matters
Reporting foreign income in Portugal does not necessarily mean being taxed on it twice.
The final tax outcome depends on:
- Portuguese law;
- Whether a double tax treaty applies and, if so, its terms for the type of income involved and other circumstances;
- Any tax paid abroad on the same income, which may be credited against Portuguese tax; and,
- Whether a blacklisted jurisdiction is involved.
Portuguese Property Taxes
IMT
PT: Imposto Municipal sobre as Transmissões Onerosas de Imóveis.
EN: Municipal Property Transfer Tax.
The tax payable by the buyer when acquiring real estate in Portugal.
It is calculated on the higher of the purchase price and the property's tax value (VPT), at rates that depend on the type of property and its intended use.
Portuguese law also provides for several other IMT exemptions, for instance on acquisitions for resale or for certain urban rehabilitation projects, each subject to specific conditions.
Why it matters
If you are buying a home in Portugal, the purchase price is not your only cost.
Where due, IMT is one of the main taxes payable on acquisition, and whether you are a Portuguese tax resident at the time of purchase may significantly change the amount.
IS / SD
PT: Imposto do Selo.
EN: Stamp Duty.
A tax levied on a wide range of acts, contracts and transactions. Common examples include property acquisitions, loans, interest and bank fees, insurance premiums, lease agreements, inheritances and gifts (except between close family members such as spouses, children and parents, which are generally exempt).
As a rule, IS only applies where those are not subject to (and not exempt from) IVA.
On a property purchase, it is charged at 0.8% on the same taxable value as IMT.
Why it matters
Stamp Duty should be factored into the total cost of buying a property in Portugal. If the purchase is financed, Stamp Duty is also due on the mortgage loan, its interest and fees
IMI
PT: Imposto Municipal sobre Imóveis.
EN: Municipal Property Tax.
It is calculated annually using the property's taxable value (VPT). For urban properties, rates range from 0.3% to 0.45%, as set each year by the municipality where the property is located.
The tax is due by whoever owns the property on 31 December of each year and is paid in the following year, in one to three instalments between May and November depending on the amount.
Why it matters
Unlike IMT, which is associated with acquiring property, IMI is an ongoing annual cost for as long as you own the property. If you buy during the year, you will already be liable for that year's IMI, payable the following year.
Before buying, it is worth checking whether any IMI exemptions or reliefs apply to your case, for instance for lower-value homes used as the owner's permanent residence, urban rehabilitation, low-income households or properties held for resale by real estate businesses, each subject to specific conditions.
AIMI
PT: Adicional ao Imposto Municipal sobre Imóveis.
EN: Additional Municipal Property Tax.
AIMI is due in addition to IMI.
It consists of an annual tax on the combined property tax value (VPT) of residential properties and building land owned by the same taxpayer on 1 January of each year. It is assessed by the AT in June and payable in September of the same year.
For individuals, the first € 600,000 is exempt (€ 1.2 million for married couples or civil partners w/ joint taxation). Above that amount, progressive rates from 0.7% to 1.5% apply. Companies are generally taxed at 0.4% from the first euro.
Properties classified as "commercial, industrial or for services" and "other" fall outside the scope of AIMI.
Why it matters
If you own several properties or higher-value real estate in Portugal, it is worth considering early AIMI, as it may influence whether properties are held personally, jointly or through a company.
Companies may either deduct AIMI as an expense or offset it against IRC on income from those properties, such as rent. The two options are mutually exclusive, so the choice should be assessed carefully.
VPT
PT: Valor Patrimonial Tributário.
EN: Property Tax Value.
It is the value assigned to a property for Portuguese tax purposes, recorded in the property's tax register (“caderneta predial”).
It is calculated using a legal formula that takes into account factors such as the property's area, location, age, quality and intended use.
Why it matters
The VPT is the basis for several property taxes, such as the annual IMI and, where higher than the purchase price, the IMT and Stamp Duty due on acquisition.
It is not necessarily the same as the price you paid for the property or its current market value, being usually lower. Checking it before buying helps anticipate both the purchase costs and the ongoing annual tax. In some cases, requesting a reassessment of the VPT may also reduce the IMI payable.
Portuguese Property Terms
CPCV
PT: Contrato Promessa de Compra e Venda.
EN: Promissory Purchase and Sale Agreement.
The binding preliminary contract signed before the final deed of acquisition of a property located in Portugal. Buyer and seller commit to the sale and agree the key terms: price, deposit, completion date and any conditions, such as mortgage approval.
Why it matters
A CPCV can create significant legal obligations.
It is not a reservation or a letter of intent.
It is legally enforceable.
Therefore, before signing it, buyers should understand the conditions, deadlines, deposit arrangements and what happens if the transaction does not complete.
Sinal
EN: Deposit
The amount the buyer pays when signing the CPCV, which should be clearly stated how much, when and on what terms.
Why it matters
This is not a refundable reservation fee.
Under Portuguese law, there are specific consequences for the deposit if either party fails to complete (such as being lost or having to be returned in double).
Escritura
EN: Public Deed of Sale
The final step of the purchase of a property in Portugal through which the ownership passes to the buyer and the balance of the price is paid.
It is normally signed before a notary, but a lawyer or solicitor can also complete the sale through an authenticated private document (Documento Particular Autenticado), with the same legal effect.
Why it matters
This is the point of no return.
Therefore, it is advisable to do all legal checks on the property beforehand.
Before signing, property transfer tax (IMT) and stamp duty (IS) must be paid, unless an exemption applies.
Caderneta Predial
EN: Property Tax Record
A document issued by the Portuguese Tax Authority (AT) that identifies the property for tax purposes and shows its taxable value (VPT).
It can be urban, for buildings and building land, or rural, for agricultural or undeveloped land. A single property, such as a farm with a house, may have more than one.
Why it matters
You are likely to see this document when buying, owning or dealing with tax matters involving property in Portugal.
It contains key tax information, including the property's taxable value (VPT), which is used to calculate several taxes.
It also shows the person registered with the AT for tax purposes, who is generally responsible for the related formalities and payments.
However, this information is not always up to date, so legal ownership should always be confirmed with the Certidão Permanente.
Certidão Permanente Predial
EN: Land Registry Certificate
An online certificate containing the registrations associated with a Portuguese property.
It is accessed by code and has an expiry date of 6 months.
It also shows pending registration requests and is kept updated during its validity period.
Why it matters
It is one of the key documents used to understand the registered legal position of a property before buying, for example:
- Ownership;
- Mortgages;
- Liens and other charges;
- Pending applications.
Registo Predial
EN: Land Registration
The public system through which the legal status of each property is recorded, including ownership, rights and charges.
It’s managed by a public entity named Land Registry Offices (Conservatórias do Registo Predial).
Why it matters
Checking the registry is a core part of due diligence, and registering the purchase after completion is essential as it protect your right against third parties.
Condomínio
EN: Condominium
The collective body through which the owners of a building divided into separate units (regime da propriedade horizontal), such as apartments, manage the building.
Each unit owner is solely responsible for their unit, while the common areas, such as the roof, lifts and stairways, are jointly owned with the other unit owners, and responsibility for them is shared accordingly. Decisions are taken at owners’ meetings and carried out by an appointed administrator.
Owners normally contribute towards the costs of maintaining those common areas.
Why it matters
Before buying an apartment, check the monthly fees, any debts linked to the unit, any approved or planned works.
Licença de Utilização
EN: Occupancy Permit
The municipal document confirming that a property may be used for a specific purpose, such as housing, commerce or services.
Why it matters
A key due diligence check before buying a property.
Although it is no longer required at the deed, it remains necessary for the property to be lawfully used and is generally required by banks for mortgage financing. Buildings constructed before 1951 may be exempt, provided they have not been altered since, which is usually confirmed by a certificate from the local council.
Portuguese Immigration Terms
Visto de Residência
EN: Residence Visa
A visa issued by a Portuguese embassy or consulate that allows a non-EU national to enter Portugal in order to apply for a residence permit under a specific immigration route.
It belongs to the EU category of long-stay visas, known as D visas, for stays of more than 90 days. In Portugal, residence visas are numbered by purpose.
Why it matters
A residence visa and a residence permit are not the same thing.
The visa is only the first stage. It must be requested before travelling, in the applicant's country of nationality or legal residence.
Once you arrive in Portugal, you must apply for a residence permit.
AR
PT: Autorização de Residência
EN: Residence Permit
The permit, Issued as a residence card by AIMA after arrival, that allows a foreign national to live in Portugal under the conditions for a specific immigration route.
Why it matters
When people talk about “having residency”, this is usually what they mean: while the visa opens the entrance door to Portugal, the AR is what allows you to stay.
D2 Visa
PT: Visto de residência para atividade profissional independente ou imigrantes empreendedores
EN: Residence visa for independent professionals and entrepreneurs
The residence visaroute for foreign nationals who intend to work as self-employed / independent professionals or invest in a business in Portugal.
Why it matters
The D2 is not only suitable for founders of large companies, but also for consultants, freelancers, among others.
D3 Visa
PT: Visto de residência para atividade altamente qualificada
EN: Residence visa for highly qualified activity
The residence visa route for researchers, certain higher education roles and professionals in highly qualified roles.
Why it matters
Given the specialised or highly qualified nature of the work, these professionals can benefit from advantages not available under standard work routes.
D7 Visa
PT: Visto de residência para reformados e titulares de rendimentos próprios
EN: Residence visa for retirees and people with passive income
The residence visa route for people who intend to live in Portugal on a pension or regular income from their own assets, such as rentals or investments.
Why it matters
Before applying, check that your income meets the minimum amount required, generally at least the Portuguese minimum wage, with additional amounts for family members.
You will also need proof of accommodation in Portugal. In practice, this can trigger your Portuguese tax residency, which may significantly change your tax position.
D8 Visa
PT: Visto para exercício de atividade profissional prestada de forma remota
EN: Remote Workers and Digital Nomads Visa.
The residency or temporary stay visa route for workers and freelancers working for for employers or clients outside Portugal.
Why it matters
The right to live in Portugal as a remote worker and your tax position are separate questions.
Holding a D8 does not, by itself, determine how your income will be taxed.
ARI / Golden Visa
PT: Autorização de Residência para Investimento
EN: Residence Permit for Investment
Despite the commonly given name of “Golden Visa”, Portugal's residence by investment programme is not a visa, but a residence permit, requested directly from AIMA, with no prior residence visa needed.
Current routes include investment in Venture Capital and Private Equity funds, scientific research, cultural contribution, job creation and company investment.
Why it matters
The eligible investments have changed significantly over time.
Real estate investment, whether direct or indirect, no longer qualifies. Older articles presenting property as a Golden Visa route are outdated.
Reagrupamento Familiar
The process that allows qualifying family members to join someone legally resident in Portugal.
It requires proof of the family relationship, adequate housing and sufficient means of subsistence.
Why it matters
Moving to Portugal as a family does not necessarily mean that every family member follows exactly the same immigration procedure.
CRUE
PT: Certificado de Registo de Cidadão da União Europeia
EN: EU Citizen Registration Certificate
The registration certificate for qualifying EU, EEA and Swiss citizens living in Portugal for more than 3 months, issued by the local council (Câmara Municipal).
Why it matters
EU nationals do not need a visa or residence permit due to EU principle of freedom of movement, but registration is mandatory after three months.
This certificate serves as proof of legal residence, often requested for healthcare, social security and tax registration, and counting towards permanent residence and citizenship.
Residência Permanente
EN: Permanent Residence
A longer-term residence status, generally available after 5 years of legal residence in Portugal.
Why it matters
Permanent residence is not citizenship.
They are different legal statuses with different rights, requirements and procedures.
While a permanent resident remains a foreign national, without a Portuguese passport or the right to vote in national elections, and the status can be lost after long periods abroad, on the other hand citizenship gives full rights as a Portuguese and EU citizen.
Nacionalidade Portuguesa
EN: Portuguese Citizenship
The legal status of being a Portuguese citizen.
It might be acquired by several routes, such as residence, descent and marriage.
Why it matters
A residence permit does not automatically lead to citizenship.
Citizenship involves a separate application and its own eligibility requirements.
Portuguese Business Terms
CAE
PT: Classificação Portuguesa das Atividades Económicas
EN: Portuguese Classification of Economic Activities
Portugal’s official code system for classifying business activities. Every company and self-employed professional registers one main CAE and can add secondary CAEs.
Why it matters
The CAE determines the activities that can be legally carried out. It can also affect tax treatment, regulatory and licensing requirements, and access to financial and tax incentive, including certain Portuguese tax programmes.
NIPC
PT: Número de Identificação de Pessoa Coletiva
EN: Legal Entity Identification Number
The 9-digit identification number attributed to Portuguese companies and other legal entities upon registration. For companies, it also serves as the tax number (NIF).
Why it matters
You’ll need it on invoices, corporate documents, contracts, bank documents, compliance form, and most official filings, such as the annual corporate income tax (IRC / CIT) return.
Lda.
PT: Limitada
EN: Limited
The mandatory suffix that identifies a sociedade por quotas, Portugal’s standard limited liability company. Unless it is a single-member company, it must have, at least, two shareholders and and shareholders’ liability is limited to their capital contributions.
Shareholders are free to set the share capital, with a minimum of €1 per shareholder.
Why it matters
Lda. is the most common company type in Portugal, and the usual choice for small and medium-sized businesses.Compared with a public limited company (sociedade anónima / S.A.), it has lower capital requirements although, in practice, a higher amount may be advisable.
Unipessoal, Lda.
PT: Sociedade Unipessoal por Quotas
EN: Single-Member Private Limited Company
A private limited liability company with a single shareholder, who can be individual or a legal entity. Its name must include Unipessoal before Lda.
Why it matters
It’s the go-to structure for setting up a Portuguese company on your own. If more shareholders join later, it can be converted into a regular Lda.
Gerente
EN: Manager / Director
The person appointed to manage and legally represent a Portuguese limited liability company (Lda.). Only individuals can be appointed, and they do not need to live in Portugal.
The role is separate from ownership: a manager does not necessarily have to be a shareholder, and vice versa.
Why it matters
Accepting the management role is not just a formality, as it can create corporate, tax and Social Security consequences. Seek advice before accepting the appointment.
Trabalhador Independente
EN: Self-Employed Worker / Independent Worker
A person that provides services on their own as an independent professional activity rather than under an employment contract, such as a freelancer or a consultant.
Why it matters
Working independently in Portugal can require registering with the Portuguese Tax Authority and complying with tax, invoicing and Social Security obligations.
Recibos Verdes
PT: Faturas-recibo
EN: Green Receipts / Invoice-Receipts
Recibos Verdes are the common name for the electronic invoices issued by independent workers through the Tax Portal (Portal das Finanças), where they are officially called invoice-receipts (faturas-recibo).
They do not relate to an employment contract, but rather to the exercise of an independent professional activity.
Why it matters
If you work independently in Portugal, you are likely to hear this term very quickly.The self-employed worker is responsible for issuing recibos verdes within the legal deadlines and in compliance with all formal and substantive requirements, including the correct value-added tax (VAT) and personal income tax (IRS) withholding treatment.
Failure to do so can lead to fines.
Abrir Atividade
EN: Registering Self-Employed Activity
Formally registering your self-employed activity with the Portuguese Tax Authority (AT). This is where you choose your main activity code (and secondaries) as well as your tax regime.
Why it matters
You must register before you start invoicing. Registration also has Social Security consequences, although new self-employed workers are generally exempt from contributions for the first 12 months.
Certidão Permanente Comercial
EN: Online Commercial Registry Certificate
An online certificate that gives access, through an access code, to a Portuguese company's official registry information, such as shareholders, managers, share capital, registered office, among others.
Why it matters
Its access code may be requested when dealing with banks, counterparties, advisers and public entities, as official proof of a company’s details.
Direção Efetiva
EN: Place of Effective Management
Where a company’s key management and strategic decisions are actually made, regardless of where it is incorporated.
Why it matters
A company being incorporated abroad is not automatically outside the Portuguese tax net being treated as tax resident in Portugal, for corporate tax purposes, if it is effectively managed from here.
This can trigger a real risk for founders who move to Portugal but keep running a foreign company.
EE
PT: Estabelecimento Estável
EN: Permanent Establishment
A tax concept that applies when a foreign business has enough presence in another country, such as an office, someone habitually concluding contracts or other means, to create certain corporate tax obligations there.
Why it matters
An overseas company can create Portuguese tax exposure even without incorporating a Portuguese company.
The exact analysis depends on how and where the business operates.
Estate Planning and Inheritance Terms
Herança
EN: Inheritance
The assets, rights and obligations a person leaves when they pass away, which together form their estate.
Why it matters
Expats living in Portugal often have assets in more than one country, which raises cross-border questions about succession law, wills, property and tax.
Herdeiro
EN: Heir
A person who inherits all or part of an estate. In Portugal, close family members (spouse, children and, where there are none, parents) are forced heirs: the law reserves a share of the estate for them, by a specific order.
The remaining - disposable portion (quota disponível) - can be left to anyone by will or succession agreement. If there is neither, it passes under the default rules of intestacy, usually to the same close family members.
Why it matters
As a rule, a will cannot override the forced heirs’ reserved share.
Testamento
EN: Will
The legal document in which a person sets out how their estate should be distributed after death, within the limits of the applicable succession rules.
Foreign nationals living in Portugal can make a will here, abroad or both. If there is more than one, they should be coordinated, as a later will can revoke an earlier one, in whole or in part.
Why it matters
Foreign nationals living in Portugal should not assume that a will be made abroad will work as intended here. It can be perfectly valid and still not have the effect you expect. If Portugal is your habitual residence when you die, Portuguese succession law will generally apply to your whole estate, unless your will chooses the law of your nationality. For example, a British national living in Portugal leaves everything to their partner in a will made in the UK. If the will does not choose English law, Portuguese law may apply, and their children may be entitled to a reserved share of the estate, whatever the will says.
Habilitação de Herdeiros
EN: Formal Declaration of Heirs
The Portuguese procedure to formally identify who the heirs are.
Why it matters
It is normally the first step before heirs can access or transfer Portuguese assets, such as property or bank accounts
Tributação Sucessória
EN: Inheritance and Gift Taxation
Unlike countries with inheritance taxes (such as the UK or France) or wealth taxes (such as Spain or Norway), Portugal has neither formally.
However, inheritances and gifts may be subject to Stamp Duty (Imposto do Selo), depending on the relationship between the parties and the assets involved.
Close family members (spouse or partner, children and parents) are generally exempt, although Stamp Duty may still apply to Portuguese property.
IMT may also apply when an estate is divided and an heir receives more than their share of the Portuguese property.
Why it matters
Saying that Portugal has "no inheritance tax" does not mean every inheritance or gift is automatically free from Portuguese tax consequences.
Planning ahead can make a significant difference.
Common Mix-Ups
NIF vs NISS
A NIF is your tax identification number.
A NISS is your Social Security identification number.
They serve different purposes, and usually you will need both.
IRS vs Tax Return
IRS is Portuguese personal income tax, annually assessed.
Modelo 3 is the main annual personal income tax return.
Portuguese speakers often use IRS informally to refer to the entire filing process, which often confuses expats.
Residence Visa vs Residence Permit
A residence visa generally allows you to enter Portugal in order to apply for residence.
A residence permit is a document issued by AIMA that allows you to live live legally in Portugal.
They are different stages of the same immigration process for nationals of countries outside the EU, EEA and Switzerland.
Immigration Residence vs Tax Residence
Immigration residence is your legal right to live in Portugal.
Tax residence is the criterion Portugal uses to determine how you are taxed: on your worldwide income or only on your Portuguese-source income.
One does not automatically determine the other.
D7 vs D8
The D7 is for people living on passive income, such as pensions, rental income or dividends.
The D8 is for people working remotely for clients or employers outside Portugal.
Which route is appropriate depends on the person's circumstances.
IMT vs IMI
IMT is the property transfer tax, generally associated with buying Portuguese property.
IMI is the annual municipal property tax paid by property owners.
In short: IMT when you buy, IMI while you own.
Caderneta Predial vs Certidão Permanente Predial
The Caderneta Predial is the property's tax record.
The Certidão Permanente Predial is the property's registry record.
Both matter when buying a home, but they show different things.
NHR vs IFICI
NHR is Portugal's former Non-Habitual Resident tax regime, now closed to new applicants.
IFICI, which stands for Incentive for Scientific Research and Innovation, is the newer regime.IFICI is often called “NHR 2.0”, but even though it has similarities, it is a different regime with a narrower eligibility.
Golden Visa vs D7
Both can lead to Portuguese residence, but they are very different routes.
Golden Visa, officially ARI, is a residence permit (not a visa, despite its name) based on qualifying investment activity and that requires only a minimal stay in Portugal.
D7 is a long-stay visa based on proving stable passive income, like pensions, rental income, dividends or interest, designed for people who actually live in Portugal.
Portugal in Plain English
You do not need to memorise every Portuguese acronym before moving.
You just need to know which ones affect you now or may in the future.
Key takeaways:
A NIF allows you to interact with the Portuguese tax system, but it doesn’t necessarily make you a tax resident.
A residence permit gives you immigration status, but it doesn’t determine your tax residence.
Buying a property involves more than agreeing a price: CPCV, Caderneta Predial and Certidão Permanente Predial, all play a part, along with taxes, such as IMT, Stamp Duty, IMI and AIMI. Running a business raises its own questions. A Portuguese company has its own corporate and tax obligations, while managing a foreign company from Portugal can trigger a Place of Effective Management or a Permanent Establishment risk.
And once you become a tax resident in Portugal, your worldwide income, investments or foreign bank accounts can all become relevant here for tax purposes.
Each term becomes more familiar and easier to grasp once you understand how they all connect.
That is the real purpose of this guide.
Frequently Asked Questions
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