Portugal's simplified tax regime for freelancers: how the coefficients work

Here is the single most useful thing to understand about freelancer taxation in Portugal: under the default system, you are not taxed on your actual profit. You are taxed on a fixed percentage of your revenue, determined by a coefficient that depends on what you do. No expense tracking for income tax purposes, no profit-and-loss statement — just revenue times a coefficient.

This is the simplified regime (regime simplificado), and it covers the vast majority of self-employed workers in Portugal. It is genuinely simple, often generous — and occasionally the wrong choice. Here is how the machine works.

Who is in the simplified regime

When you open atividade (register as self-employed with Finanças, the tax office), the simplified regime is the default if your gross annual business income is below €200,000. Above that, or by choice, you move to organized accounting (contabilidade organizada) — real profit calculation with a mandatory certified accountant.

You can opt out of the simplified regime voluntarily, but the option binds you for a minimum period, so it is a decision to model, not to toggle.

The coefficients: how much of your revenue is taxed

Each type of income gets a coefficient — the fraction deemed to be your taxable profit, with the remainder treated as presumed expenses:

Example: a developer invoicing €50,000 in listed professional services has a taxable base of €37,500 (75%). The other €12,500 is presumed to be expenses — whether you actually spent it or not. That taxable base then enters the normal progressive IRS brackets (the Portuguese personal income tax — not the American IRS), together with your other income.

Your activity code, chosen when you register, is what steers income toward 0.75 or 0.35 — one of several reasons that registration form deserves care.

Tip: New freelancers get a break: in the first year of activity the applicable coefficient for services is reduced by 50%, and by 25% in the second year (conditions apply). If you are choosing when to start your atividade, this ramp-up is worth factoring in.

The 15% expense-justification rule

The regime has a wrinkle that surprises people at filing time. For services taxed at 0.75 or 0.35, the presumed-expense deduction is not entirely unconditional: 15% of your gross income must be matched by actual expenses or deductions — a fixed automatic allowance covers a large part of it, and business expenses registered in e-Fatura (the invoice platform — always give your NIF on business purchases) fill the rest.

If your income is modest, the automatic allowance alone usually satisfies the 15%; at higher incomes, failing to show enough real expenses increases your taxable base. The practical lesson: even in the "no bookkeeping" regime, collecting invoices with your tax number still pays.

What the simplified regime does not simplify

Being simplified for income tax does not exempt you from the rest of the freelancer stack:

• Social security (Segurança Social) has its own logic — quarterly income declarations, contributions at 21.4% on a separately computed base;
• VAT follows its own rules entirely — the Article 53 exemption or the normal regime, regardless of your income tax regime;
• You still issue recibos verdes (electronic invoice-receipts) for every payment and file the annual IRS return with Annex B.

Simplified vs organized accounting: when to switch

The simplified regime effectively grants you 25% (or 65%, or 85%) of revenue as expenses without proof. The comparison writes itself:

• If your real expenses are lower than the presumed share — the typical laptop-and-brain freelancer — the simplified regime wins, and it wins on compliance costs too;
• If your real expenses are higher — subcontractors, materials, significant rent, travel-heavy work — organized accounting can produce a smaller taxable profit even after paying the mandatory accountant;
• High revenues near or above €200,000 take the choice away.

Tip: Re-run this comparison whenever your cost structure changes — hiring a subcontractor, renting a studio, taking on hardware-heavy projects. The regime that was obviously right in year one can quietly become wrong by year three.

Key takeaways

The simplified regime taxes freelancers on a coefficient of revenue — 75% for listed professional services, 35% for other services, 15% for goods — with a first-year and second-year reduction for newcomers and a 15% expense-justification rule to keep an eye on. It spares you bookkeeping for income tax, but leaves VAT and social security untouched, and it competes with organized accounting the moment your real expenses grow.

If you are registering a new activity or your numbers have shifted, a short professional simulation — simplified versus organized, on your actual revenue and costs — is the cheapest way to make sure the "simple" option is also the right one.