Do I need an accountant for my Portuguese tax declaration (IRS)?

No, you are not legally required to hire an accountant if you are on the simplified regime (regime simplificado) with a single source of freelance income. But some situations genuinely call for professional help, and the cost of getting it wrong in the wrong year is real.

Here is how to figure out which category you are in, without any spin toward either answer.

(IRS, Imposto sobre o Rendimento das Pessoas Singulares, is Portugal's annual income tax declaration. If you have heard people say "file my taxes" in Portugal, this is what they mean.)

One thing worth knowing upfront: in Portugal's expat scene, especially in the Algarve, the person handling your taxes is often not a certified accountant (contabilista certificado). Many are consultants, fiscal representatives, or simply "the person someone in a Facebook group recommended." Some are great, some are not, and there is no mandatory credential for filing a simplified regime IRS on someone's behalf. Keep that in mind when weighing the "hire someone" option.

The simplified regime is simpler than you think

If you are a freelancer on the regime simplificado, you are in the bracket Portugal specifically designed to be manageable for solo entrepreneurs. AT does a lot of the calculation automatically. You declare your turnover, the system applies the expense coefficients, deductions are mostly pre-filled from your e-fatura data.

This is different from corporate accounting, which is where the real complexity lives. Simplified regime IRS is not that. Many people who have been paying €300–500 a year to a consultant or accountant for IRS filing are paying for work that takes a few focused hours if you know where to look.

That said, "simplified" does not mean there are no traps.

Situations where you probably do not need one

Single source of freelance income, nothing else. If your income for 2025 was all Recibos Verdes (no rental income, no foreign pension, no employment alongside your freelance work), you are filing Anexo B and little else. The structure is standard, the numbers flow from your AT invoicing record, and the annual IRS guide for this situation is well-documented. If you want to know exactly what each field in Anexo B means and requires, the Anexo B field guide covers every campo.

Same situation as last year, or the year before that. First-year filings have some setup: activity codes, regime confirmation, getting the correct annexes. But once you have done it once correctly, the second year is mainly reviewing pre-filled fields and updating your numbers. And the third year is the same again. If your life situation has not changed (same income source, same marital status, same address), your IRS declaration is structurally identical year after year. The numbers change, the form does not. At some point, paying someone to repeat the same filing you could copy from last year stops making sense.

You are comfortable navigating in Portuguese (or using a tool that translates it). The Portal das Finanças is entirely in Portuguese, and some of the field labels are genuinely cryptic. But this is a solvable problem. Each campo (field) has a description if you know where to find it, and the logic of the form is consistent once you understand the pieces.

Your income stayed below the threshold for provisional income payments (pagamentos por conta). If you are a new freelancer or your income was modest, you may not have the complication of provisional payments. Once you are above certain thresholds that trigger advance payment obligations, your quarterly filings interact with your annual IRS in ways worth understanding clearly.

Situations where professional help is worth it

NHR or IFICI status. Non-Habitual Resident and its successor regime IFICI are not self-explanatory, and the rules have changed. If you have NHR (registered before 2024) or applied for IFICI, the tax treatment of foreign income (pensions, foreign employment income, dividends) is specific to those regimes. Getting it wrong in the first year under a special regime is the kind of mistake that is hard to unwind. This is one area where a consultation with someone who knows the regime is genuinely worth the money.

Multiple income sources across annexes. Anexo B for freelance income, Anexo F for rental income, Anexo J for foreign income: once you are combining these, the interactions between them matter. Foreign income in particular requires understanding which country's tax treaty applies and what that means for how Portugal taxes it. A single-annex filing is one thing. Multi-annex with foreign components is another.

First year as a freelancer, income threshold questions. Your first year on regime simplificado involves choosing your activity code, confirming your VAT exemption status, and understanding which coefficients apply to which income types. These decisions do not just affect your current IRS. They set up your baseline for quarterly obligations going forward. If you are uncertain about any of them, a single session with a certified accountant (contabilista certificado) to confirm the setup is worth more than years of guessing. For this one, go with a certified professional, not a consultant.

Cross-border complications. Foreign pension? Property in multiple countries? Income from a company in another EU member state? These are not edge cases for expats. They are common. And they typically require understanding double-taxation treaties, which are specific to the countries involved. Nobody is going to help you more here than a professional who files these regularly.

A year where something big changed. Got married or divorced. Had a child. Sold property. Started receiving a pension from abroad. Moved partway through the year and you are dealing with partial-year residency questions. Changes in family status interact with IRS in specific ways. The agregado familiar (household composition) affects your quociente familiar and certain deductions. When the structure changes, it is worth reviewing with someone the first time it changes.

The real cost calculation

What people charge to file your IRS varies widely. A qualified contabilista certificado (certified accountant) typically charges €300–500 for a standard situation. But many expats are not using certified accountants. They are using consultants, fiscal helpers, or someone recommended in an expat group, and prices range from €150 to €500+ depending on who you found and what they claim to cover.

What you are buying is their time to navigate the portal, confirm that the right annexes are included, verify the numbers, and submit. With a certified accountant, you are also buying professional liability: if they file it wrong, that is on their professional insurance.

With an informal consultant, you are buying convenience, but the liability stays with you. The person whose NIF is on the declaration is ultimately responsible, regardless of who typed in the numbers. A rough sense of what you would owe is also worth having before you decide. The tax calculator gives you an estimate based on your income. And many freelancers who have moved to self-filing have found that declarations were filed with wrong or missing information over the years: missing dependents, incorrect annex selections, foreign income declared under the wrong category. It happens more often than you would expect.

If your situation is simple and stable, paying someone hundreds of euros for a filing you never review is a high price for a service you could do yourself in a focused afternoon. If your situation is genuinely complex, getting a qualified professional (and making sure they actually are qualified) is money well spent.

The middle path most people miss

The decision is not binary. You do not have to choose between "hand everything to someone" and "figure it all out alone."

The middle path: understand what is in your declaration, even if someone else files it.

This is something most expat freelancers do not do. They receive a PDF after filing, glance at the final number, and file it away. But reading your own declaration (understanding which annexes are included, what income was declared in each one, which expenses were claimed, and what the final calculation means) takes maybe 30 minutes once you know what you are looking at. And it changes your relationship to the whole thing.

Whether you use a certified accountant, a consultant, or file yourself, you should be reviewing the declaration before it is submitted. It is in your name, your NIF, your responsibility. If you are paying someone, reviewing their work is how you know whether you are getting what you are paying for.

Two free tools worth knowing about:

IRS reader: upload a previous year's declaration and it explains every campo in clear, step-by-step language. Takes a few minutes. Useful whether you are checking an accountant's work or preparing to file yourself.

Guided IRS filer: the full filing flow. Prepare, review, and submit your 2025 declaration step by step. Free to try during early access. Worth a look before you decide how to handle this year's filing.

If you want to walk through the filing process before committing, here is a step-by-step guide for freelancers and expats. And if you are curious what changed this year versus last, here is what is different for 2025.

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Quick reference: hire someone or do it yourself?

Your situation	Likely verdict
Recibos Verdes only, nothing else	You can probably do this yourself
Same as last year, no changes	You can probably do this yourself
NHR or IFICI status	Get professional advice at least once
Foreign income in Anexo J	Worth a consultation
Multiple annexes (B + F + J, etc.)	Worth a consultation
First year filing as a freelancer	Consider a single review session
Cross-border pension or property	Professional help is worth it
Big life change this year	Review your situation

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Related: I gave my tax portal password to my accountant: here's what I learned

Related: Two years in Portugal before I logged into the AT portal: you should probably log into yours

Related: I compared three years of declarations my accountant filed: the numbers didn't add up