San Marino Corporate Income Tax

Corporate income tax (IGR for legal persons)

Companies pay the IGR at a flat proportional rate on taxable profits. San Marino offers a substantial reduction for newly incorporated companies and applies withholding taxes on outbound dividends, interest and royalties.

• Standard corporate IGR rate — 17% % (Law no. 166 of 16 December 2013 (Imposta Generale sui Redditi))
• Transitional corporate rate 2026–2030 — 18% (raised from 17%) for tax periods 2026, 2027, 2028, 2029, 2030 % (Law 141/2025 amending Law no. 166 of 16 December 2013)
• New-company tax reduction — 50% reduction of corporate IGR for the first 5 years (effective rate ~8.5%) (subject to investment/employment conditions; confirm eligibility) (subject to investment/employment conditions; confirm eligibility) (Law no. 166 of 16 December 2013 (Imposta Generale sui Redditi) and economic-incentive decrees)
• Corporate tax base — Net business income (worldwide income for resident companies; San Marino-source income for non-resident companies) (Law no. 166 of 16 December 2013 (Imposta Generale sui Redditi))
• Withholding tax on dividends — 5% on dividends paid to resident and non-resident individuals; generally exempt when paid to non-individual recipients that so declare % (Law no. 166 of 16 December 2013 (Imposta Generale sui Redditi))
• Withholding tax on interest — 13% on interest from loans granted by foreign companies, unless lender is a credit institution ((confirm bank-deposit vs loan-interest treatment)) % (confirm bank-deposit vs loan-interest treatment) (Law no. 166 of 16 December 2013 (Imposta Generale sui Redditi))
• Withholding tax on royalties — 20% on royalties paid to non-resident individuals or entities % (Law no. 166 of 16 December 2013 (Imposta Generale sui Redditi))
• Tax-treaty relief on withholding — Domestic withholding rates may be reduced under San Marino's bilateral double-tax treaties (San Marino double taxation treaties (DTTs))
• Corporate return filing deadline — Annual IGR return filed after year-end, broadly aligned with the personal deadline (commonly mid-year following the tax year) ((approx — confirm exact corporate date with accountant)) (approx — confirm exact corporate date with accountant) (Law no. 166 of 16 December 2013 (Imposta Generale sui Redditi))