Reference
Social Security for Freelancers in Portugal, Rates & Rules 2026
Last updated: 2026-05-03
How contributions are calculated
As a trabalhador independente, your Social Security contributions are based on income you received (cash-basis), not invoiced.
| Parameter | Value |
|---|---|
| Base rate | 21.4% of relevant income |
| Income coefficient (services) | 70% of gross income |
| Income coefficient (goods) | 20% of gross income |
| Monthly cap | 12× IAS = €6,445.56/month (2026) |
Effective rate on services revenue: 21.4% × 70% = 14.98% of gross income received.
Quarterly declaration (Declaração Trimestral)
Every quarter you declare your income from the previous quarter to Segurança Social. This determines your monthly contributions for the following quarter.
| Quarter's income | Declared in | Contributions paid |
|---|---|---|
| Jan–Mar | April | May–Jul |
| Apr–Jun | July | Aug–Oct |
| Jul–Sep | October | Nov–Jan |
| Oct–Dec | January | Feb–Apr |
Contributions are paid between the 10th and 20th of each month.
Deferred enrolment in the first year
A first-time trabalhador independente is not enrolled in the regime immediately. Enrolment takes effect on the first day of the 12th month after início de atividade, so nothing is owed and no quarterly declaration is due before that date. It runs from the activity start date rather than a calendar year, and income has no effect on it.
This is a deferral, not an exemption: you are outside the regime rather than excused from it, so no contributory record builds up during it. It applies to a first-ever registration only, and a reinício contributes from the first day of its own month.
Once you are enrolled, your first quarterly declaration covers the income from the quarter in which enrolment took effect.
Exemptions
The statutory exemptions are a different thing from the deferral above: an exempt worker is enrolled in the regime but does not contribute.
| Exemption | Duration |
|---|---|
| Simultaneous employment | While four cumulative conditions hold (income and pay thresholds apply); partial, reassessed quarterly |
| Pensioner | Ongoing, where the activity is legally cumulable with the pension |
| No income, or prior year met at the minimum | Assessed each January |
The 15% expense proof connection
Social Security contributions count toward the 15% expense proof requirement under the simplified regime. They're automatically included, no separate documentation needed.