Portugal 2026: the new tax rules your company needs to know

The 2026 tax package changes deadlines, deductions and the corporate tax regime. We summarise the essentials, in plain language.

Every year, the State Budget introduces changes that force companies to review deadlines and estimates. In 2026, the most relevant changes are in income taxation, investment incentives and new filing deadlines.

For most SMEs, the practical impact is felt mainly in the planning of special advance payments and in the documentation supporting deductions. A timely review avoids surprises at year-end.

Our tax team helps Portuguese and international companies adapt to these rules with a practical reading of each scenario. If you have questions about the impact on your case, talk to us.