The purchase value is adjusted by the currency-devaluation coefficient for the year you bought (Portaria 382/2025/1), and only 50% of the gain is taxed. That amount is added to your income and taxed at the progressive IRS rates (mandatory aggregation); set the marginal rate to fit your case (from 12.5% to 48%). Costs include IMT, stamp duty, the deed and the estate-agent fee; improvement works are invoiced renovations from the last 12 years.

Educational estimate, not financial advice. Covers property sold by residents in mainland Portugal; it does not cover the main-home reinvestment exemption, properties bought before 1989 (exempt) or non-residents.