Taxes

Portugal — Tax: Double Tax Treaties

Portugal maintains a highly comprehensive network of Double Taxation Agreements (DTAs) with over 80 countries globally to prevent international double taxation and encourage foreign direct investment. These bilateral treaties regulate which country has the primary right to tax various categories of income, including salaries, pensions, dividends, interest, and royalties. By establishing lower maximum withholding tax rates on cross-border payments, the agreements significantly reduce tax friction for multinational businesses and expatriates living in Portugal.

Autoridade Tributária e Aduaneira · Last verified 2026-07-17

Key Facts

  • Portugal has signed active Double Taxation Agreements with more than 80 sovereign jurisdictions.
  • The treaties utilize standard OECD models to determine fiscal residency and resolve dual-residency ties.
  • Bilateral treaties lower standard withholding tax rates on cross-border dividends, interest, and royalties.
  • Tax credits are granted to Portuguese residents to offset income taxes already paid to foreign treaty states.
  • The treaties cover both individual income tax (IRS) and corporate profit tax (IRC).
  • Exchange of information provisions are included in all modern agreements to target tax evasion.
  • To claim treaty benefits, taxpayers must submit a certified tax residency certificate (Modelo 21-RFI).

Related Topics

tax-residency
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