Portugal tax guide for UK expats: freelancing, IFICI, VAT and Social Security

UK nationals thinking about freelancing in Portugal tend to ask the same thing: what does self-employment look like here, and how does it compare to what I had at home?

This guide covers the tax regime for UK nationals who are moving to Portugal and planning to work as freelancers or run a small business: income tax, Social Security, VAT, the IFICI tax incentive that followed the old NHR regime, and the UK-Portugal tax convention. It is not a substitute for professional advice, but it gives you the numbers and the structure to have an informed conversation with an accountant.

Your starting point: residency and registration

Before anything else, you need to know whether you are a tax resident in Portugal. There are two tests, and meeting either one is enough. The first is a day count: more than 183 days in Portugal, consecutive or not, in any 12-month period that begins or ends in the tax year. It is not the calendar year. The second is a home: you hold a dwelling here, on any day of that period, in circumstances that suggest you intend to keep it and live in it as your habitual residence.

Residency starts on the first day of your stay, not on 1 January and not on the day you update your address with AT. Tax residency is also separate from your legal right to live in Portugal. You can have one without the other, so check the immigration side with the Portuguese immigration authority (AIMA) in parallel.

Once you are a tax resident, you register as a sole trader with AT (Autoridade Tributária e Aduaneira, Portugal's tax authority). This is called abertura de atividade and you do it through the Portal das Finanças. You pick the activity code that matches your work. For most professional services that is a code from the Art. 151 CIRS table (a programmer, for example, uses 1332). From then on you are a trabalhador independente: a sole trader issuing recibos verdes for your services.

The simplified tax regime

Most freelancers in Portugal start on the simplified tax regime (regime simplificado). It is open if your gross Category B income in the previous year did not exceed €200,000. Under this regime, AT calculates your taxable income by applying a fixed coefficient to your gross revenue instead of requiring a full accounting ledger. Going over the limit once does not end it; the regime stops only after two consecutive years over, or in one year when you are more than a quarter over.

For services from a profession listed in the Art. 151 table (the category most freelancers fall into), the coefficient is 0.75. That means 75% of your gross revenue is taxable income and AT treats the rest as presumed business costs, though for services part of that must still be backed, as below. Services not specifically listed in the table use 0.35 instead.

There is a catch for service income. AT expects at least 15% of your gross services revenue to be backed by proof, and adds the shortfall to your taxable income. Without any invoices, you start with the larger of two amounts: your specific deduction (€4,587.09 for 2026) or the Social Security you paid, counted up to 10% of your gross revenue. They do not add together. Documented expenses (invoices, contracts, receipts) cover whatever is still missing.

The tax rates that apply to your taxable income are Portugal's progressive IRS (income tax) brackets. For 2026, the marginal rates run from 12.5% to 48%, with each rate applying only to the slice of income inside its bracket. At typical freelance income levels, the effective rate is well below the top bracket.

Two things reduce your tax:

The first-years reduction. In the tax year you start activity, the services coefficient is cut by 50%. In the following tax year it is cut by 25%. Both are calendar tax years, not 12 months from the day you start. There are conditions: you must have no employment (Category A) or pension (Category H) income in that year, and you must not have closed any activity in the previous five years. Miss one and that year's reduction is lost.

Social Security above the line. If the Social Security you paid is more than 10% of your gross services revenue, the part above that line is deducted from your net taxable income, down to zero at most (Art. 31.º n.º 2 CIRS). The part up to the line is the part that counts toward the proof described above, so the same euro is never used twice.

IFICI: the flat-rate tax incentive

IFICI (Incentivo Fiscal à Investigação Científica e Inovação) is the successor to the old NHR regime. If you have not been a Portuguese tax resident in the previous five years, you may qualify, but only through one of seven specific routes written into Art. 58.º-A of the tax benefits statute (EBF). Each route is tied to a particular kind of role or entity: higher-education teaching and research, qualified positions at companies with certain investment tax benefits, highly qualified professions at eligible export-oriented companies, activities recognised as economically relevant, R&D personnel, employees and board members of certified startups, and a regional route for Madeira. A competent entity confirms the route. Being a freelancer in a listed profession does not by itself qualify you, so check which route, if any, fits before you plan around it.

If you qualify, IFICI applies a flat 20% IRS rate to your Portuguese-source employment and self-employment income from the qualifying activity, for ten consecutive years. Other Portuguese income is taxed at the normal progressive rates. You have to keep meeting the conditions every year to claim the rate for that year.

Foreign income is treated differently. Under IFICI, foreign-source employment, self-employment, capital, rental and capital-gains income is exempt in Portugal, with exceptions for certain capital income paid from low-tax jurisdictions. Foreign pensions are not exempt and are taxed at the general progressive rates. Whether foreign income is taxable in the source country is then a matter for that country and the treaty.

IFICI is not automatic. You submit the inscription request on the Portal das Finanças by 15 January of the year after the year you became tax resident. A late request does not void the benefit forever, but it shortens the ten-year window.

UK-Portugal tax convention

The UK and Portugal signed a new double taxation convention in London on 15 September 2025. It entered into force on 29 December 2025. Portugal applies it to tax periods starting on or after 1 January 2026, and to withholding on or after that date. The UK applies it to income tax and capital gains tax from the 2026-27 tax year, which starts on 6 April 2026. The previous convention, from 1968, still governs earlier periods, so a Portuguese 2025 return is decided under the old text.

For a freelancer, one rule matters most. Under Art. 7.º n.º 1 of the new convention, your fees are business profits, and business profits are taxed only in the country where you are resident, unless you run the business through a permanent establishment in the other country. Where a double tax credit applies, Portugal gives you a credit for the tax you paid in the UK on that income, capped at the Portuguese tax on it. You claim it on Anexo J of your IRS return.

Portugal taxes its residents on their worldwide income. How the convention treats other kinds of income (employment, pensions, rental income from a UK property) depends on the specific article, and this guide does not cover those articles. If you have UK-source income, a bilateral tax adviser is worth the cost in the first year.

Social Security contributions

If you are a sole trader in Portugal, you contribute to Portuguese Social Security (Segurança Social). If this is your first-ever registration as a sole trader, the contributions are deferred: they start on the first day of the 12th month after you open activity (início de atividade). If you have been a sole trader before, contributions start on the first day of the month you restart. If you closed activity during that first deferral period and restart within the following 12 months, the count pauses and then picks up from the first day of the month you restart. Once contributions apply, you pay €20.00 a month until your first quarterly declaration; after that, each month's contribution is based on the income you declared for the previous quarter, and never falls below that minimum.

The standard contribution rate is 21.4% of your contribution base. The monthly contribution base is one third of your relevant income from the previous quarter. For services, relevant income is 70% of your gross income in that quarter.

How your earlier UK National Insurance record fits with Portuguese Social Security, for healthcare access and pension, is a question for the relevant authorities or a bilateral adviser. This guide does not cover it.

VAT: Art. 53 exemption for services freelancers

Portugal's Art. 53 VAT exemption lets you invoice without charging IVA (VAT) if your turnover in Portugal in the previous year was not above €15,000. Exactly that amount still qualifies. Most new arrivals with modest Portuguese client bases qualify initially.

The thresholds work like this:

• Up to €15,000 in the previous year: exempt from IVA. Your invoices must carry the mention "IVA - regime de isenção".
• Between €15,000 and €18,750 during the year: the exemption ends on 1 January of the following year.
• Above €18,750 mid-year: VAT applies immediately. The invoice that crosses the ceiling must include IVA.

The test counts supplies made in Portuguese territory. A service to a business customer in another country, the UK included, is outside Portuguese VAT, so it does not count toward the threshold. That invoice carries the mention "IVA - autoliquidação" instead of the exemption mention. A service to a private individual outside the EU, the UK included, is a different case: Portuguese VAT applies to it by default, with a closed list of exceptions, so it can count. If you work mainly for UK or other foreign businesses, your Portuguese turnover may stay well under the threshold even as your total income grows.

AT-certified invoicing

Certified invoicing software is required once your turnover in the previous year went above €50,000. It is also required at any turnover if you use invoicing software at all or keep organised accounting. Below that, without software or organised accounting, you can use pre-printed documents from an authorised printer or AT's own free invoicing tools. AT's Portal and mobile app issue Portuguese-language documents only, so if you need English invoices you will need software. The certified system generates an ATCUD code for each invoice, which appears alongside a QR code.

Descodify is an invoicing platform built specifically for freelancers in Portugal. Invoicing is free on every plan. The Completo plan adds guided VAT returns, Social Security declarations, and IRS filing support.

What to do first

The sequence that works:

1. Get your NIF (tax number) and check your tax residency position, and the immigration side with AIMA
2. Register as a sole trader on Portal das Finanças (abertura de atividade, choosing your activity code)
3. If you think you might qualify for IFICI, work out which of the seven routes applies and submit the request by 15 January of the year after you became resident
4. Set up your invoicing before you issue your first invoice
5. Speak with a bilateral tax adviser to understand your UK obligations, especially if you have UK-source income, rental property, or pension income

Step 5 is not optional if you have ongoing UK ties. The convention needs careful reading for dual-income situations, and IFICI adds another layer.