Mauritania Investment Income Guide 2026

Overview — Investment Income Taxation

Mauritania taxes investment income through withholding taxes at source for most passive income streams. The withholding tax is generally a final tax for resident individuals, meaning no further tax reporting is required. For companies, withheld tax is creditable against corporate tax. For non-residents, withholding tax rates may be reduced under applicable double tax treaties. The Direction Générale des Impôts administers all withholding tax under the Code Général des Impôts.

Dividends — 10% WHT

Dividends paid by Mauritanian-resident companies are subject to withholding tax at 10%. This is a final tax for resident individuals, meaning the dividend income is not included in the individual's progressive IRPP assessment. For corporate shareholders, the 10% WHT is a creditable advance payment against their CIT liability. For non-residents, the dividend WHT rate is generally 10% (reduced under applicable DTTs).

Interest Income — 10% WHT

Interest income is generally subject to 10% withholding tax. This includes interest on bank deposits, corporate bonds, and government securities. For resident individuals, the 10% WHT is generally a final tax. For corporate investors, the WHT is creditable against CIT. Interest paid to non-residents is subject to 10% WHT unless reduced under a DTT. Interest on certain government securities may be exempt or subject to reduced rates.

Capital Gains on Securities

Capital gains on the disposal of listed shares by individual investors may be exempt from tax, provided the shares are held on a recognised stock exchange. Gains on unlisted shares and other securities may be subject to tax as ordinary income. For companies, all capital gains are included in taxable profit and taxed at the standard CIT rate.

FAQs

Do I need to report dividend income on my tax return?

If you are a resident individual, the 10% WHT on dividends is final, so no further reporting is needed. Non-residents and corporate shareholders should report and claim treaty relief where applicable.

Are foreign investment income and capital gains taxable in Mauritania?

Yes, tax residents are taxed on worldwide investment income. Foreign dividends, interest, and capital gains should be declared in the annual tax return. Foreign tax credits may be available under DTTs.

Can I claim a refund if WHT exceeds my tax liability?

Yes, where the WHT deducted exceeds the final tax liability, you can claim a refund from DGI by filing an annual return.

Disclaimer

This guide provides general information about Mauritanian investment income taxation for the 2026 tax year. Tax laws and rates may change. Always consult with a qualified Mauritanian tax advisor or the Direction Générale des Impôts for advice specific to your situation. InvestmentKit does not provide tax advice.