The standard rate applies to all companies resident in mainland Portugal. The SME rate — currently 16%, dropping to 15% from 2026 — applies to the first €50,000 of taxable income for qualifying small and medium-sized enterprises and small mid-cap companies engaged in commercial, industrial, or agricultural activities.
A company with €50,000 of taxable profit in 2026 pays 15% on all of it. A company with €200,000 pays 15% on the first €50,000 and 19% on the remaining €150,000. The blended effective rate is considerably lower than the headline standard rate suggests — which is a relevant number for early-stage businesses where the first years of profitability involve modest taxable income.