Portugal vs Iceland tax in 2026: three Icelandic brackets against nine

Residence: six months against 183 days

Iceland makes you fully liable after six months in the country in a twelve-month period, or from the day you take up domicile; leaving, the liability ends when you deregister from Registers Iceland and move your domicile, with limited liability continuing on Icelandic-source income. Portugal counts 183 days or a habitual home (IRS Code, art. 16.º). Article 4 of the convention settles a conflict by permanent home, centre of vital interests, habitual abode and nationality.

• 31,49 % / 37,99 % / 46,29 % Icelandic brackets (municipal share included) less a credit of ISK 72 492 a month; 12,5 % to 48 % in Portugal
• 22 % vs 28 % on interest, dividends and gains; Iceland exempts the first ISK 300 000 of listed income
• Pensions: residence state (art. 18), public-service pensions excepted
• 10 % / 15 % — 10 % — 10 % treaty ceilings on dividends, interest, royalties

Income tax, side by side

An employee on ISK 800 000 a month (about 63 000 € a year) pays roughly 23 % of income tax in Iceland after the credit, 27 % with the 4 % pension premium; in Portugal about 16 600 € of IRS plus 6 900 € of contributions, 37 %. On capital income Iceland’s 22 % beats Portugal’s 28 % (though Portugal’s holding-period reductions close part of the gap), and on VAT Portugal’s 23 % beats Iceland’s 24 %. The residency and planning page works through the move.

The 1999 convention

• Pensions (art. 18): pensions for past employment taxable only in the residence state; public-service pensions (art. 19) only in the paying state unless the pensioner is resident and national of the other. Icelandic occupational pension funds (the second pillar that holds most Icelandic retirement savings) pay to Portugal and, on a residence certificate, without Icelandic tax; Portugal taxes at the progressive rates after the 4 587 € deduction.
• Dividends (art. 10): 15 %, or 10 % for a company holding 25 %. Interest (art. 11) and royalties (art. 12): 10 %. Iceland’s 22 % withholding on dividends to individuals is reduced on a treaty form; Portugal’s 28 % falls to the treaty rate on Modelo 21-RFI.
• Capital gains (art. 13): property where it stands; shares in the residence state.
• Relief: credit in both countries. The treaty page reads the articles.

Companies and VAT

Iceland’s corporate tax applies at a flat rate to limited companies with 20 % withheld on dividends paid to non-resident companies (reduced by the treaty); VAT 24 % and 11 %. Portugal: IRC 19 % in 2026 (17 % from 2028), 15 % on the first 50 000 € for SMEs, VAT 23 / 13 / 6 %. Iceland is in the EEA, so the EU parent-subsidiary and interest-royalties directives do not apply; the treaty rates do.

Social security

Iceland is an EEA state: Regulation 883/2004 applies — one system at a time, A1 postings up to 24 months, pension periods combined, S1 for pensioners. An Icelander employed by a Portuguese company pays 11 % (employer 23,75 %); the Icelandic occupational-fund contribution stops and the Portuguese state pension accrues instead.

Property

Buying in Portugal: IMT by bracket (7,5 % flat while you are still non-resident since 25 May 2026, refundable within two years of becoming resident) plus 0,8 % stamp duty; IMI 0,3–0,45 % of the tax value; AIMI above 600 000 €. Rents at 25 %; half the gain at sale. Iceland’s own property tax is municipal, and rents are taxed as capital income at 22 % after the 25 % allowance.

Special regimes

NHR closed on 1 January 2024. IFICI gives 20 % for ten years on Portuguese income from listed activities and exempts foreign income with progression for people not resident here in the previous five years — the NHR page for Icelanders has the detail. Pensions are excluded.

Before you move

Questions from Icelandic clients