How Much Social Security Does a Freelancer Pay in Portugal?
It is not 21.4% of your invoices. It is 21.4% of a monthly base built from three months of income, with limits, and a few situations where the rule changes.
- The contribution is 21.4% of a monthly base, not of your invoices. Sole traders with commercial or industrial income pay 25.2% (art. 168.º).
- The base is one third of your relevant income: 70% of service income and 20% of income from goods, over the three months before the declaration (arts. 162.º and 163.º).
- It applies for the declaration month and the two after it, is capped at 12 times the IAS, and has a statutory floor.
- Your first enrolment takes effect on the first day of the 12th month after the month you started (art. 145.º), and some employees, pensioners and others are exempt.
- Contributions are paid monthly, between the 10th and 20th of the following month (art. 155.º).
A Portuguese freelancer does not pay 21.4% of what they invoice. The contribution is 21.4% of a monthly base: one third of a relevant income, which is 70% of your service income, or 20% of income from goods, over the previous three months. The base applies for that month and the next two, is capped at 12 times the IAS and has a statutory floor. Sole traders selling goods pay 25.2%. Next: work out your quarter with the example below, then check whether an exemption or special rule applies. The filing side is in the quarterly declaration guide.
Which rate applies to you
Art. 168.º of the Código dos Regimes Contributivos sets the rate for independent workers at 21.4% (n.º 1). It sets 25.2% for sole traders with commercial or industrial income and for holders of a limited-liability sole establishment, and their spouses (n.º 4). The line is drawn by art. 134.º n.º 1 b), which refers to income of a commercial or industrial activity under art. 3.º n.º 1 a) of the IRS Code, and it is why the activity you declare when you open atividade can change your rate. Separately, a client that takes more than 50% of your yearly activity pays a contribution of its own, but only if you are subject to contributions and earn at least six times the IAS a year from services (art. 140.º n.os 1 and 2): 10% where economic dependence is above 80% and 7% in the other cases (art. 168.º n.º 7). Other clients pay nothing. It is theirs, not deducted from you.
The calculation, step by step
- Relevant income for the quarter
Take 70% of your total service income and 20% of your income from producing and selling goods, over the three months before the declaration month (art. 162.º n.º 1). Hotel, restaurant and drinks activities declared as such are treated like goods.
- Divide by three
The monthly contribution base is one third of the relevant income of the declaration period (art. 163.º n.º 1).
- Apply the rate
Multiply the base by 21.4%, or 25.2% if the higher rate applies. The result is the monthly contribution.
- Apply the base for three months
The base takes effect in the declaration month and the two months after it (art. 163.º n.º 1).
Example: a freelancer invoices €6,000 of services from July to September and declares it by the end of October. Relevant income is €6,000 × 70% = €4,200. The base is €4,200 ÷ 3 = €1,400. The contribution is €1,400 × 21.4% = €299.60 a month, so €898.80 for the quarter, for October, November and December. The contribution for October is paid between 10 and 20 November, and so on.
The 25% option, and what it costs you
When you file the quarterly declaration you may choose a relevant income up to 25% higher or lower than the calculated one, in steps of 5% (art. 164.º). On the example, minus 25% gives a relevant income of €3,150, a base of €1,050 and a contribution of €224.70 a month. Plus 25% gives €5,250, a base of €1,750 and €374.50. A lower base costs less now and records a lower contributory income for your future benefits, so treat it as a trade-off and not as a discount.
Floor, ceiling and organised accounting
Two limits apply to the base. The ceiling is 12 times the IAS a month (art. 163.º n.º 5). With the 2026 IAS at €537.13, that is €6,445.56, so the contribution tops out at about €1,379.35 a month at 21.4%. The floor is set for the case where there is no income or the contribution would be below €20, in which case the base is fixed so that the contribution equals that amount (art. 163.º n.º 2). The code says the €20 is updated in line with the IAS, so the figure for the current year is the one Segurança Social publishes. This guide does not quote one.
If you are taxed under organised accounting, the rule is different. Relevant income is the taxable profit of the previous calendar year (art. 162.º n.º 3), the monthly base is one twelfth of it with a minimum of 1.5 times the IAS, about €805.70 in 2026, and it is fixed in October to apply from January of the following year (art. 163.º n.º 3). You can ask to be assessed quarterly instead (art. 164.º n.º 3).
Your first twelve months
For a first enrolment as an independent worker, the enrolment takes effect on the first day of the 12th month after the month you started (art. 145.º n.º 1). If you started on 10 March 2026, it takes effect on 1 March 2027. A restart of activity takes effect on the first day of the month of the restart (n.º 3), and closing your activity inside the first 12 months suspends the count, which resumes if you restart within the next 12 months (n.º 4). Until your first quarterly declaration, the base for a new enrolment is the floor (art. 165.º n.º 1). The quarterly declaration only binds workers who are subject to contributions (art. 151.º-A n.º 1), but the January confirmation of the previous year's income is due whether or not you owe contributions, except for the pensioner cases in art. 157.º n.º 1 b) and c) (art. 151.º-A n.os 5 and 6).
Employee and freelancer at the same time
Art. 157.º n.º 1 a) exempts you from contributing on freelance income when your average monthly relevant income is below four times the IAS, €2,148.52 in 2026, and three conditions all hold. The employer and the client are different and have no group or control link. The job puts you in another social protection scheme covering all the same contingencies. And your average monthly pay in that scheme is at least one IAS. If your monthly relevant income is at or above four times the IAS, the base is only the amount above that limit (art. 163.º n.º 4). The exemption is recognised automatically when Segurança Social already knows the facts, and otherwise on request (art. 157.º n.º 2).
When nothing is due
- A recognised exemption, including the employee case above (art. 159.º n.º 1 a)).
- Pensioners of invalidity or old age, where the activity can legally be combined with the pension, and holders of an occupational-risk pension with at least 70% incapacity (art. 157.º n.º 1 b) and c)).
- A justified suspension of the activity, a proven period of parental unavailability, or temporary incapacity for work (art. 159.º n.º 1 b) to d)).
Paying, and paying late
The contribution is paid monthly, between the 10th and the 20th of the month after the one it refers to (art. 155.º n.º 2). Paying late is an administrative offence: a light one if you comply within 30 days after the deadline, a serious one otherwise (n.º 4). Segurança Social also reviews each year's declarations against the income reported by the tax authority and notifies the difference, and what you pay as a result of that review is treated as paid late (art. 164.º-A).
The Social Security calculator turns a quarter's invoicing into the monthly base and contribution, with the 12 × IAS ceiling and the 25% option.
Work out my contribution
Frequently asked questions
Is Social Security 21.4% of my invoices in Portugal?
No. It is 21.4% of a monthly base equal to one third of relevant income, which is 70% of service income and 20% of goods income over the previous three months (arts. 162.º, 163.º and 168.º).
Who pays 25.2% instead of 21.4%?
Sole traders with commercial or industrial income, holders of a limited-liability sole establishment, and their spouses (art. 168.º n.º 4).
What is the maximum I can pay?
The monthly base is capped at 12 times the IAS. With the 2026 IAS of €537.13 that is €6,445.56, or about €1,379.35 a month at 21.4%.
Do I pay in my first year of self-employment?
A first enrolment takes effect on the first day of the 12th month after the month you started (art. 145.º n.º 1). The January confirmation of income is still due.
What if I also have a job?
You may be exempt on freelance income below four times the IAS if the three conditions in art. 157.º n.º 1 a) all hold. Above that limit only the excess forms the base.
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