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Social Security
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About this calculator
Model employee, employer, freelancer and company-partner contributions with monthly forecasts and due windows.
Contribution planning for every working profile.
Free, no account and no card. Every figure shows the rule it came from, for the 2026 income year.
Who this calculator is for
For employees, employers, freelancers and company partners who need the contribution each profile owes and the window it is due in.
What it covers
- 4 profiles
- Quarterly adjustment
- Forecast
- Future payments
The rules it applies
- Quarterly declaration
- Last day of January, April, July and October
- Administered by
- Segurança Social — separate from the tax authority
Source: Taxovate fiscal calendar 2026 — checked 2026-08-15
Questions about this calculator
Which profiles does it model?
Four: employees, employers, freelancers and company partners. Each has its own rate and its own rhythm of declarations and payments.
What is the quarterly adjustment?
Freelancers declare quarterly - by the last day of January, April, July and October - and the contribution is trued up against real income. The forecast shows what that does.
Is this the tax authority?
No. Segurança Social is a separate institution from the Autoridade Tributária, with its own declarations, deadlines and debts.
Read the rules behind it
- How a self-employed contribution in Portugal is worked out
- Taxes in Portugal: what you actually pay in 2026
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An estimate from the inputs given, not a filed position. Anything submitted to the Autoridade Tributária or Segurança Social through Taxovate is reviewed by a qualified accountant first.