Withholding Tax (Retenção na Fonte) for Freelancers in Portugal - English Guide

When I issued my first recibo verde to a Portuguese company, I received less than I had invoiced. They had deducted 25%, which was the legal rate at the time, and paid the rest directly to the tax authority on my behalf. Nobody had told me that was how it worked.

The mechanism is called retenção na fonte, which translates literally as "retention at source." The part that surprises most expat freelancers: it only applies to Portuguese clients. Foreign clients pay your full invoice, every time.

What it is and why it exists

Withholding tax is a collection mechanism. Instead of waiting for you to calculate and pay your annual IRS in June, the state collects it in installments through the companies that pay you. Each Portuguese client that pays you for professional services deducts a percentage before transferring the money.

It is not an extra tax. It is an advance on the IRS you would owe anyway. At year end, the withheld amounts are credited against your total tax liability. The mechanism exists because individual IRS payments (especially for self-employed people with variable income) are harder to enforce than employer-side deductions.

The rate in 2026: 23%

OE2025 (Lei 45-A/2024) reduced the standard withholding rate from 25% to 23%, effective 1 January 2025. The reduction applies to activities listed in Article 151 CIRS, which covers most independent professionals: consultants, IT specialists, designers, translators, architects, engineers, and others.

In concrete terms: invoice €1,000, your client pays €770 and sends €230 to AT.

You have the option to keep 25% on any given invoice if you prefer a larger advance against a potential year-end balance. But 23% is the default, and for most freelancers it is the better choice.

Specific rates for other income types:

Income type	Rate
Professional services (Art. 151 CIRS)	23%
Intellectual property (royalties)	16.5%
Regulated professions (architects, doctors, engineers)	11.5%

When you are exempt

There are two exemptions worth knowing.

First year of activity. In the year you open your activity, you can claim exemption from withholding. In some cases this extends into the second year. The exemption is not automatic: you must declare it on each invoice receipt and notify clients. If you do not, they will withhold, and they are correct to do so.

Below the €15,000 threshold. If your gross income in the previous year was below €15,000, you are exempt in the current year (Art. 101-B CIRS). The threshold tracks the Art. 53 VAT exemption value. As with the first-year exemption, you must declare this on each invoice and tell your clients. They cannot read your previous year's returns.

In both cases, the recibo verde on the Portal das Finanças has a specific field where you select the exemption and cite the legal basis. Certified invoicing software gives you the same option.

The foreign-client rule

Withholding tax applies only when the paying entity is a Portuguese company or organization. A client in Germany, the UK, France, Brazil, or anywhere outside Portugal pays your full invoice amount. They have no obligation under Portuguese law to withhold anything, and they have no mechanism to do so.

This creates an asymmetry that matters for your cash flow planning:

If you work exclusively with foreign clients, you receive full payment on every invoice. But you are also responsible for setting aside money for your annual IRS. There is no employer or client withholding it for you. At year end, that bill can be larger than expected if you have not been saving.

If you work with both Portuguese and foreign clients, your Portuguese clients are gradually paying down your IRS liability throughout the year. Your foreign clients are not. The annual declaration reconciles the total.

The quick decision table

Situation	Withholding applies?	Rate
Portuguese client, activity under Art. 151 CIRS	Yes	23%
Portuguese client, first year of activity (exemption declared)	No	N/A
Portuguese client, previous year income below €15,000 (exemption declared)	No	N/A
Client in another EU country	No	N/A
Client outside the EU	No	N/A
IP royalties, Portuguese client	Yes	16.5%

Note: "Portuguese client" includes both companies and individuals registered in Portugal. The withholding obligation in practice falls on companies (not private individuals), so the vast majority of B2B service invoices are covered.

How it reconciles at year end

When you file Modelo 3 in April-June, the process works like this: AT sums your total income, applies the simplified regime coefficients to arrive at your taxable base, calculates your IRS, and then deducts all the withholdings that your Portuguese clients submitted on your behalf throughout the year.

If the withheld total is higher than your IRS liability, you receive the difference as a refund. If it is lower (which often happens for freelancers with significant foreign-client income), you pay the balance.

The withholding amounts appear automatically in your Modelo 3 pre-fill, drawn from the recibos verdes your clients recorded. You verify the figures rather than entering them from scratch.

Descodify calculates the withholding amount automatically on each invoice and tracks your estimated annual IRS position against the withholdings already made, so you can see in real time whether a year-end balance payment is likely.

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The QR code and AT certification explainer covers the technical infrastructure behind how AT tracks invoices. The QR code on each invoice encodes the withholding tax amount as one of its data fields, which is part of how the system cross-references what clients report against what you declare.

The eFatura guide covers how to read your expense statement and verify your income records in the AT portal, useful context for understanding what AT can see before you file your annual declaration.