Keep three separate tax questions on your checklist.
Bulgarian domestic residence: a more-than-183-days test, permanent address and centre of vital interests are among the relevant criteria; the full statutory circumstances matter. UK domestic residence: HMRC uses its own Statutory Residence Test, considering days, ties and other conditions across the UK tax year. Treaty residence: if both states classify you as resident, the UK–Bulgaria treaty must be applied to the circumstances and relevant income categories. A treaty tie-break does not mean tax returns, social-security rules or withholding obligations simply disappear.
Keep a dated travel log, accommodation documents, employment or company-management evidence and pension/income records. Before relying on a 183-day rule or leaving the UK, confirm the required UK departure procedure (P85 or Self Assessment/SA109 where applicable) and the Bulgarian reporting position for the actual year. A UK limited company managed while living abroad may raise separate company-tax or employer issues requiring specialist advice.
Original sources: HMRC Statutory Residence Test ↗ · HMRC current synthesised treaty text ↗ · Bulgarian Finance Ministry ↗. Evidence review: 17 October 2026. This guide cannot determine individual tax residence.
Bulgarian tax residence is more than 183 days
The Bulgarian Ministry of Finance and National Revenue Agency describe resident individuals by reference to permanent address, a stay of more than 183 days in any 12-month period, the centre of vital interests, and special situations such as an overseas assignment by the Bulgarian state. Importantly, having a permanent address in Bulgaria does not make a person tax resident if the centre of vital interests is outside Bulgaria. The facts, not a single form, control the answer.
Centre of vital interests may involve where a person's close family lives, principal home, employment, business, assets and economic interests are concentrated. Bulgarian rules also address counting entry and exit days; do not substitute the UK's 6 April tax year when doing Bulgarian day-count analysis. Bulgarian Finance Ministry: residence criteria ↗.
| Example | Why a day count is not the whole answer |
|---|---|
| Someone spending 190 days in Bulgaria | The greater-than-183-days rule may establish Bulgarian residence, subject to the actual statutory conditions and any treaty analysis. |
| Someone staying 130 days with spouse and permanent home in Bulgaria | Centre-of-vital-interests and permanent-address facts may be material even below 183 days. |
| Someone registered at a Bulgarian address but genuinely living and working elsewhere | The Ministry specifically says an address alone does not override a centre of vital interests outside Bulgaria. |
Run the UK's Statutory Residence Test separately
The UK tests residence by 6 April to 5 April tax years, automatic overseas and UK tests, and sufficient ties to the UK. 183 days in the UK is an automatic UK-residence test, but fewer days do not necessarily make a person non-resident. Available homes, family, work, prior visits and day-count rules can all matter.
HMRC's split-year treatment is conditional. Leaving Britain mid-year does not automatically end UK residence on the moving date. UK temporary non-residence rules can tax certain gains or payments on return. HMRC SRT detailed notes (updated June 2026) ↗.
If both countries claim residence: the treaty tie-break
The UK–Bulgaria 2015 Double Taxation Convention, as modified by the Multilateral Instrument, applies a sequence for individuals who are resident under both domestic systems: (1) permanent home available, (2) closer personal and economic relations / centre of vital interests if homes in both, (3) habitual abode, (4) nationality and, where necessary, (5) competent-authority mutual agreement.
The treaty tie-break determines residence for treaty purposes. It does not simply delete domestic filing duties or govern every tax. Keep evidence of housing availability, nights spent, family, economic ties and tax residence certifications. HMRC: current synthesised treaty text, Article 4 ↗.
Worldwide income, source income and special categories
Bulgarian residents are generally taxable on income from Bulgaria and abroad; Bulgarian non-residents are generally taxable on Bulgarian-source income. The well-known 10% personal income tax rate should not be used as a blanket answer for every class of pension, dividends, disposal, employment income, social security contribution or tax exemption. Check the relevant tax year and income category.
| Income or asset | Questions to establish |
|---|---|
| UK State Pension, occupational pension or government-service pension | Which treaty article applies, whether UK/Bulgarian source or residence taxation is allocated, and whether declaration or credit is necessary. |
| UK rent from a retained property | UK property income filing, Bulgarian resident worldwide-income treatment and any treaty relief. |
| UK employment while physically working from Bulgaria | Work-location rules, employer payroll, permanent-establishment and social-security implications. |
| Sale of a UK or Bulgarian property | Capital-gains rules, possible source-state taxing rights, relief, reinvestment and reporting. |
| Bank interest, dividends and investment accounts | Income type, withholding tax, foreign tax credit, account residency reporting and any exemption. |
A Bulgarian residence certificate, UK treaty relief claim or foreign tax credit may be relevant, but an adviser must assess which authority grants it and what documentary proof is required.
Claiming treaty relief without assuming zero tax
- Determine domestic tax residence for each country and period, including UK split-year and Bulgarian date rules.
- Identify each income type, source jurisdiction, payer, withholding and tax year; apply the treaty article for that specific income.
- Use Article 4 tie-break only if dual domestic residence exists; document permanent home, family, work and habitual abode.
- Ask the relevant revenue authority for tax-residency confirmation and check the paperwork required by the payer/authority for reduced withholding or refund.
- Apply treaty foreign-tax-credit or exemption rules in the appropriate tax return; retain UK and Bulgarian tax-payment certificates.
- Reconcile Bulgarian calendar-year returns against UK 6 April tax years rather than assuming one statement covers both.
Article 21 of the treaty sets out methods of eliminating double taxation, often by allowing a credit subject to limits. It does not mean the tax paid abroad is always refundable in full. The treaty covers listed income/capital-gains taxes, not Bulgarian property taxes, VAT, inheritance tax or UK National Insurance. HMRC treaty Article 21 ↗.
How to establish and document the end of Bulgarian tax residence
There is no universal "cancel tax residence" button. An individual leaving Bulgaria should determine the departure date under Bulgarian law, change address or other registrations where legally required, move the real centre of vital interests where applicable, and keep evidence of housing, family movements, employment, residence and time spent in each country.
Ask the Bulgarian NRA or an independent adviser whether the tax-residency criteria have ceased to apply and whether a certificate, annual return or final declaration is required. If you retain Bulgarian rent, employment or property, source-based tax and municipal obligations may remain after you cease to be resident. Tell HMRC if leaving or returning to the UK as relevant, using its current Self Assessment/P85 and SRT guidance.
A working evidence pack for both tax authorities
- Travel log, boarding cards and entry/exit dates for the relevant 12-month periods and UK tax years.
- Rental agreements, ownership documents and evidence showing which home was actually available.
- Family residence, employment, employer instructions, company ownership and business activity.
- Pension statements, UK P60/P45, dividend/rental records, sale documents, bank interest and withholding statements.
- Previous returns, tax residence certificates and written advice about any treaty claims.
- Documents proving a later move away from Bulgaria and any ongoing Bulgarian-source income.
General background: Bulgarian NRA ↗; HMRC residence ↗.
Official sources and review record
These primary sources are presented as starting points, not evidence that a specific taxpayer, inheritance, lender or shipment qualifies for a particular result. Rules, fees and bank products may change.
- Bulgarian Ministry of Finance — personal income tax ↗ — Resident versus non-resident tax liability.
- Bulgarian National Revenue Agency — taxation ↗ — Resident and worldwide-income framework.
- HMRC — Statutory Residence Test ↗ — UK residence and split-year rules, revised June 2026.
- HMRC — UK–Bulgaria treaty synthesised text ↗ — Article 4 and tax relief provisions.
- HMRC — tax on foreign income ↗ — Residence and reporting overview.
Editorial source review: 17 October 2026. Publisher: PluginPip Ltd. Independent information, not regulated financial services, conveyancing, tax advice or legal representation. Seek advice on your facts before signing or moving substantial funds.