Taxes
Simulador de IRS (IRS Tax Simulator)
Use the official IRS simulator to estimate your refund or tax due before submitting your return. Available free of charge on Portal das Finanças.
What you need before you start
- NIF and Portal das Finanças password or Chave Móvel Digital
- Previous year's income data (payslips, rent receipts, etc.)
- Deduction information (health, education, housing, etc.)
- Household data
Step by step
Go to www.portaldasfinancas.gov.pt and authenticate
Search for 'Simulador IRS' or navigate to Cidadãos → IRS → Simulador
Fill in the fields with income earned in the previous year
Enter applicable deductions and tax benefits
Provide the household composition
Click 'Simular' (Simulate) to see the estimated result
Compare results between joint and separate filing (if married/cohabiting)
The result is an estimate — the final amount depends on validation by the Tax Authority (AT)
Tip: If in doubt, always contact the official service directly.
Ready to get started?
Go to Simulador de IRS (IRS Tax Simulator)Disclaimer: This guide is for general informational purposes only. Information may have been updated. Always check the official website for binding and up-to-date information. This site is not affiliated with the Portuguese Government or any public entity.