UK-Morocco Double Taxation: MRE Guide Post-Brexit 2026

No, absolutely not. The 1981 tax convention between the United Kingdom and Morocco is a bilateral treaty independent of EU membership. Brexit, effective January 31, 2020, has no effect on this convention. It continues to apply fully to avoid double taxation of MRE in the UK on their Moroccan income. Only EU-related rules (free movement, European tax directives) were impacted.

Yes, if you are a UK tax resident, you must declare your Moroccan rents in your HMRC Self Assessment (form SA105 for foreign rental income). These rents are first taxed in Morocco (income tax on rental income), then you claim a Foreign Tax Credit Relief in the UK to avoid double taxation. The declared amount must be converted to GBP at the HMRC annual average rate.

The calculation is done in three steps: 1) Convert your Moroccan income to GBP; 2) Calculate the theoretical UK tax on this income; 3) The tax credit = minimum of (Moroccan tax paid converted to GBP) and (theoretical UK tax on that income). Example: you paid 2,000 MAD in Moroccan income tax on rents (about £150). The UK tax on the same rents would be £120. Your credit is £120 (capped at UK tax). The £30 differential is not refundable.

Under the UK-Morocco convention, private sector pensions (such as CNSS) received by a UK tax resident are taxable in the UK. They must be declared in your Self Assessment. If Morocco withholds tax on your CNSS pension (which can happen depending on your status), you can claim a tax credit to avoid double taxation. Moroccan public pensions (state civil servants) remain taxable in Morocco only.

Self Assessment is the British income tax filing system for people whose income is not entirely subject to PAYE (Pay As You Earn) withholding. If you have foreign income (Moroccan rents, dividends, pensions), you must register for Self Assessment, obtain a UTR (Unique Taxpayer Reference), then submit your annual return before January 31. The return is filed online at gov.uk/self-assessment and covers the tax year from April 6 to April 5.

The risks are significant: minimum £100 penalty for late filing, interest on unpaid tax (currently about 7.5%/year), penalties for undeclared income up to 30% to 200% of tax owed depending on whether it was deliberate, and potentially criminal prosecution in serious cases. HMRC has automatic information exchange agreements (CRS/FATCA) with many countries, and Moroccan banks are increasingly reporting accounts held by UK residents.

HMRC publishes official monthly and annual exchange rates on its website (gov.uk/government/collections/exchange-rates-for-customs-and-vat). You can use: 1) The HMRC annual average rate for the relevant tax year (recommended for simplicity); 2) The spot rate at the date of each transaction (more precise but more complex). In 2025-2026, the approximate average rate is 1 GBP = 13.5 MAD. Avoid using favorable rates: HMRC accepts published official rates or rates from a recognized source such as the Bank of England.