Personal income tax, Portugal vs Belgium: the 2026 brackets and what they cost

The two tariffs for 2026 income

Belgium then exempts the first 11 550 € of taxable income (the tax on that slice is deducted), adds a communal surcharge of a few percent of the tax set by each commune, and deducts flat professional expenses from salaries. Portugal deducts 4 587 € from salaries and pensions (or the 11 % social contributions if higher), applies a solidarity surcharge of 2,5 % above 80 000 € and 5 % above 250 000 €, and lets married couples and registered partners split the income in two before applying the table.

• 50 % from 51 070 € in Belgium, plus commune; 48 % from 86 634 € in Portugal
• 11 550 € Belgian tax-free quotité; 4 587 € Portuguese deduction
• 30 % vs 28 % on dividends and interest (833 € of dividends exempt in Belgium)
• Joint filing only in Portugal; Belgium taxes spouses separately with a marital quotient

What a single employee pays

Belgian figures apply the tariff to salary minus social contributions (13,07 %) and the flat professional-expense deduction (30 %, capped), then subtract the tax on the exempt quotité; the communal surcharge is taken at 7 %. Portuguese figures apply the tariff to salary minus 4 587 € (or the 11 % contributions above 41 700 €), before the personal credits that typically return a few hundred euros. Belgium is lighter on modest salaries — the 11 550 € quotité and the expense deduction outweigh its higher rates — the two converge around 60 000 €, and Portugal is lighter above 80 000 €. Net pay tells a different story: Belgian contributions take 13,07 % against 11 % in Portugal.

Couples. Portugal’s quotient halves the income before the table: a one-earner couple on 60 000 € pays about 10 400 €. Belgium’s marital quotient shifts up to 30 % of the earner’s income to the non-earning spouse within a ceiling — a smaller effect. Two-earner couples are taxed on each income in both countries.

Where the systems differ beyond the tariff

• Capital income. Belgium: 30 % withholding, final for most people, with 833 € of dividends exempt; no tax on savings-account interest up to a ceiling. Portugal: 28 %, no allowance, optional aggregation.
• Capital gains. Belgium: 10 % on financial assets since 2026 after 10 000 € a year (details on the withholding and gains page). Portugal: 28 %, reduced for listed securities held over two, five or eight years; property gains at 50 % in the progressive table.
• Rents. Belgium taxes private lettings on the indexed cadastral income, not the rent; Portugal taxes actual rents at 25 % (15 / 10 / 5 % for long leases).
• Pensions. Belgium taxes pensions at the progressive rates with a pension tax reduction; Portugal after the 4 587 € deduction, at the progressive rates, with no NHR rate for new residents.
• Special regimes. Portugal’s IFICI: 20 % for ten years on listed activities and exemption of foreign income (with progression), for people not resident here in the previous five years; not for pensioners.

Filing

Portugal: online return 1 April – 30 June, refund or payment by 31 August. Belgium: paper by end of June, Tax-on-web by mid-July, with a proposed simplified return for many employees and pensioners; the assessment arrives up to two years later.

Questions