UK Statutory Residence Test → Bulgaria: break UK residence in 2026

Leaving the UK on paper is not the same as leaving the UK for tax. The Statutory Residence Test (SRT), set out in Schedule 45 to the Finance Act 2013, decides whether HMRC still has a claim on your worldwide income and gains in any given tax year. For ex-non-doms, founders selling a business, retirees crystallising a pension, or anyone tired of the UK's 45% top marginal rate and now-residence-based inheritance tax, the SRT is the single most important rulebook in the relocation. Get it right and you arrive in Bulgaria on a 10% flat rate, eurozone, EU-resident base — with the UK shut behind you. Get it wrong and HMRC continues to tax your worldwide income for another tax year, often with a six-figure cost. This guide walks through every limb of the SRT (the version codified in HMRC's RDR3 guidance), the split-year cases that determine the date your year actually splits, the 10-year UK IHT tail, and the Bulgarian arrival paperwork that closes the loop.

Why the SRT Matters More Than Ever in 2026

For decades, "leaving the UK" was a fuzzy concept. HMRC relied on case law (Gaines-Cooper v HMRC, Grace v HMRC) and IR20 guidance, both notoriously imprecise. Wealthy individuals could leave the UK, return for short visits, and still be treated as non-resident on the strength of a "distinct break". That regime ended in April 2013 when the SRT became statutory. Since then, residence is a day-count and ties exercise — mechanical, predictable, and unforgiving of error.

From 6 April 2025 the stakes increased. The UK abolished the non-dom regime, replaced it with the 4-year Foreign Income and Gains (FIG) regime, and most importantly switched inheritance tax from a domicile basis to a residence basis. An individual UK tax resident in at least 10 of the previous 20 UK tax years is now a "long-term UK resident" whose worldwide estate stays within 40% UK IHT for up to 10 years after leaving the UK. Every UK tax year you stay extends the tail. The SRT is therefore not just an income tax mechanism — it is the gateway to escaping the IHT residence count, and the speed at which you exit matters.

For full context on the non-dom abolition and the FIG cliff edge, see our UK Non-Dom Abolition — Bulgaria's 10% as the Post-FIG Answer guide.

The Three-Layer Structure of the SRT

HMRC's RDR3 guidance walks through the test in a strict order. If a higher layer applies, lower layers are not considered.

Note the order: if you pass any automatic overseas test you are non-resident, even if you would also have failed an automatic UK test. The hierarchy is your friend on departure — engineering your year so that one of the automatic overseas tests is met is the cleanest possible exit.

Layer 1 — the Three Automatic Overseas Tests

Test 1A — the 16-day rule (most common for leavers)

If you were UK tax resident in any of the three previous UK tax years and you spend fewer than 16 days in the UK in the current tax year, you are automatically non-resident. This is the cleanest exit from the UK. A founder who completes their move by mid-April, attends two trustee meetings in London over the following year, and otherwise stays away, can satisfy this test from year one.

Test 1B — the 46-day rule (for never-residents)

If you were not UK tax resident in any of the previous three UK tax years and you spend fewer than 46 days in the UK, you are automatically non-resident. This rarely applies to leavers (by definition they were UK resident); it is more relevant to UK-arrival planning.

Test 1C — full-time work overseas (most powerful for active earners)

You are automatically non-resident if all of the following apply across the tax year:

• You work full-time overseas (an average of at least 35 hours per week across the relevant period, calculated in line with HMRC's reference-period methodology); AND
• You have no "significant break" from overseas work (no period of 31+ continuous days without work apart from leave); AND
• You spend fewer than 91 days in the UK in the tax year; AND
• You work more than three hours per day in the UK on fewer than 31 days in the tax year.

This is the test most commonly relied on by founders who become directors of a Bulgarian EOOD (single-member private limited company) and work from Sofia, Plovdiv or Varna. It allows up to 90 UK days per year — useful for individuals with school-age children, UK business interests, or family in the UK.

Layer 2 — the Three Automatic UK Tests

If you do not pass an automatic overseas test, the next question is whether you are conclusively UK resident.

Test 2A — 183 days

Spend 183 days or more in the UK in the tax year and you are UK resident. No further analysis is needed. Departure planning therefore has a hard ceiling: you cannot keep one foot in London while claiming to be non-resident.

Test 2B — the only home test

You are UK resident if you have a home in the UK for a period of at least 91 consecutive days, at least 30 of which fall in the tax year you are testing, and during that period you have either no overseas home or an overseas home you used for fewer than 30 days in the tax year. The test bites particularly hard on UK residents who buy a Bulgarian apartment in May but do not actually move in until October — the calendar gap can be fatal.

Test 2C — full-time work in the UK

You are UK resident if you work full-time (an average 35+ hours/week, no significant break) in the UK for any 365-day period that falls partly in the relevant tax year. This catches individuals who think they have left while continuing to consult for a UK employer from a UK desk.

Layer 3 — the Sufficient Ties Test

If neither set of automatic tests applies, the SRT asks how many UK ties you have and matches that count to a day-count band. There are five ties; four apply to anyone, the fifth (the "country tie") only applies to leavers.

Day-count bands for leavers

For an individual who was UK resident in any of the three previous UK tax years (the "leaver" category — this is you, if you are reading this guide), the day-count thresholds are:

Read the table backwards. If you can keep your UK day-count below 46 with no more than 3 ties, you are non-resident. If you can keep it below 16 with up to 4 ties (and you are not caught by Test 2B/2C), you are non-resident regardless of ties. The combinations are unforgiving in either direction.

Split-Year Treatment — Cases 1, 2, 3 for Leavers

UK tax residence is normally an "all or nothing" determination for a tax year. Split-year treatment is the exception: where you leave the UK partway through a tax year and meet the conditions of one of three "leaver" cases, the year splits into a UK part and an overseas part. The income and gains arising in the overseas part are outside UK self-assessment except for UK-source items. For someone realising a large capital gain, vesting share options, or selling a UK business near the move, split-year mechanics can mean six- or seven-figure savings.

Case 1 — starting full-time work overseas

Case 1 applies if all of the following hold:

1. You were UK resident in the tax year in question;
2. You were UK resident in the previous tax year;
3. You will be non-resident in the following tax year under the third automatic overseas test (full-time work abroad); AND
4. You start to work full-time overseas during the tax year of departure and satisfy the overseas work criteria from a defined day until 5 April.

The year splits on the day you first work more than three hours overseas. Case 1 takes priority over Cases 2 and 3 where multiple cases would apply.

Case 2 — partner accompanying a Case 1 leaver

Case 2 covers a spouse or civil partner who themselves does not work full-time overseas, but joins their partner who does (and who qualifies under Case 1). The year splits on the later of the partner's Case 1 trigger date and the date the Case 2 individual ceased to have a UK home. Useful for non-working spouses and homemaker partners.

Case 3 — ceasing to have a UK home

Case 3 applies if you leave the UK to live abroad and cease to have a UK home at some point in the tax year. You must:

1. Be UK resident for the year and the previous year;
2. Be non-resident in the following tax year;
3. Cease to have any UK home during the year;
4. Within six months of ceasing to have a UK home, be tax resident in another country (or meet the ‘ties in another country’ condition).

Selling the UK family home, or letting it on an arm's-length tenancy that prevents you using it, is the typical trigger. The year splits on the date the UK home is given up. Bulgaria's tax residency certificate is the cleanest evidence of the other-country residence required.

The UK IHT 10-Year Tail — Why Speed Matters

The Finance (No. 2) Act 2024 replaced UK inheritance tax's old domicile basis with a residence-based test from 6 April 2025. The "long-term UK resident" status now hinges on whether you were UK tax resident in at least 10 of the previous 20 UK tax years. If you were, your worldwide estate remains in scope of 40% UK IHT for a tapered tail period after departure:

For a UK resident of 17+ years, the practical consequence is brutal: you carry UK IHT exposure on your worldwide estate for a full decade after leaving. Compare with Bulgaria's 0% inheritance tax for direct ascendants and descendants and spouses (the maximum band, for non-relative heirs, is 6.6%). Every year you delay the SRT exit is another year on the back end of the tail.

For full IHT planning around the tail (life cover, gift strategies, EOT and trust structures), see our UK IHT residence-based planning guide.

The UK-Bulgaria Double Tax Treaty — the Tie-Breaker

The UK-Bulgaria Double Tax Treaty (signed 26 September 1987, in force from 1988) is your safety net where both jurisdictions claim you in the year of move. Article 4(2) contains a tie-breaker that resolves dual residence in this order:

1. Permanent home — the country where you have a permanent home available wins. If you have a home in both, move to (2).
2. Centre of vital interests — the country with the closer personal and economic relations wins. If unclear, move to (3).
3. Habitual abode — the country where you ordinarily live wins. If both equally, move to (4).
4. Nationality — your nationality decides. If both or neither apply, the competent authorities settle.

In practice the tie-breaker is rarely needed for clean exits, but it provides legal cover where the SRT and the Bulgarian PITA both attach for the year of move. The treaty also allocates 5% maximum UK withholding on dividends (Article 10), 0% on interest (Article 11), and reserves taxation of capital gains on most assets to the country of residence (Article 13). These are the rates that drive the post-move tax saving on a UK-listed portfolio.

The Bulgarian Side — PITA Article 4

Bulgaria's test is simpler than the SRT. Under Article 4 of the Personal Income Tax Act (PITA), you are Bulgarian tax resident in a calendar year if any of:

• You spend more than 183 days in Bulgaria in any 365-day period (counting the day in which the 184th day falls as the year you became resident);
• Your centre of vital interests is in Bulgaria (family, economic activity, source of income);
• You have a permanent address in Bulgaria, unless your centre of vital interests is elsewhere.

Bulgaria does not have a split-year mechanic. You are either resident for the whole calendar year or not. For a UK leaver moving in April or May, this means careful coordination: the Bulgarian residency triggers around early November (after 183 days), but the UK split-year may have already operated to end UK exposure in May. The DTA tie-breaker bridges the gap.

Step-by-step on the Bulgarian arrival, see our EU citizens residence guide and the 183-day rule explained.

Closing the Loop — UK and Bulgarian Paperwork

UK side

• Form P85 — submitted to HMRC online (via your personal tax account) or by post. Triggers your departure record, PAYE code change and tax refund where applicable.
• Self-Assessment for the year of departure — with the SRT residence position and (if applicable) the split-year box ticked. SA109 supplementary pages disclose split year.
• NT (No Tax) PAYE code — for individuals continuing to draw UK employment income post-departure (e.g. UK pension), the NT code stops UK PAYE deduction where the DTT allocates taxing rights to Bulgaria.

Bulgarian side

• EU citizen residence certificate — for UK nationals: from 1 January 2021 the UK is a third country, so the route is the long-stay D visa, then a residence permit (Type D residence card) from the Migration Directorate.
• Bulgarian Personal Identification Number (LNCh) — required for tax filings, banking and any commercial activity.
• Bulgarian tax residency certificate — issued by the National Revenue Agency, used to claim treaty benefits in the UK (most importantly the 5% dividend withholding cap).
• Bulgarian tax return — first annual return filed by 30 April of the year following arrival.

For the residence permit pathway in detail, see Type D visa for UK citizens and our non-EU citizens residence guide.

Three Worked Cases

Case A — Tech founder, £8M exit pending

Sarah, a 42-year-old London-based SaaS founder, expects to sell her company in October 2026 for £8M. UK CGT on a UK resident would be £8M × 24% = £1,920,000 (BADR reduces the first £1M to 14% = approximately £1,820,000 in total). By moving to Bulgaria on 1 May 2026 and meeting Case 1 split-year (full-time work overseas as a director of her Bulgarian holding EOOD from 1 May), the disposal on 1 October falls in the overseas part of the split year. Gains on shares are taxable in the country of residence under Article 13(5) of the UK-Bulgaria DTT, so the £8M gain accrues to Bulgaria. Bulgarian individual CGT on the disposal of a private (non-EU/EEA-listed) company holding is 10% = £800,000, with planning options to use a Bulgarian holding structure to lower this further. Provisional saving: ~£1.0M–£1.4M, depending on structure. The SRT compliance is the gating item: Sarah must hit fewer than 91 UK days and fewer than 31 UK workdays from 1 May to 5 April 2027, and stay non-resident for at least 5 complete UK tax years (Section 10A TCGA temporary non-residence).

Case B — Retired private-sector executive, £180k private pension + £400k portfolio

Robert, 64, draws a private occupational pension and SIPP drawdown totalling £180,000/year and lives off £25,000/year of dividends from his UK equity portfolio. As a UK resident: pension income with no personal allowance (income > £125,140) = 20% × £37,700 + 40% × £87,440 + 45% × £54,860 = approximately £67,200 income tax; dividends at 39.35% above the £500 allowance = £9,640; total UK tax bill ~£76,800/year. As a Bulgarian tax resident with split-year on 1 May (Case 3, sold the Surrey home): under UK-Bulgaria DTT Article 18 private pensions are taxable only in the country of residence, so pension taxed in Bulgaria at 10% = £18,000; dividends taxed at 5% UK withholding + 5% Bulgarian top-up (treaty mechanism) = £2,500; total ~£20,500/year. Annual saving: ~£56,300. Robert needs fewer than 46 UK days per year (3 ties: accommodation if he keeps a UK pied-à-terre, 90-day, country) or fewer than 91 days with 2 ties. Note: UK government-service pensions (NHS, civil service, military, local authority) remain UK-taxable under DTT Article 19 even after Bulgarian residency — a different mechanic applies.

Case C — FIG-rejected returner, ex-non-dom, £2M offshore reserves

Amir, 51, was a non-dom in the UK for 18 tax years. The FIG regime does not apply to him because he never spent 10 consecutive non-UK years. From April 2025 his worldwide income is fully UK-taxable. He has £2M of unremitted foreign income from pre-2025. Plan: Amir uses the Temporary Repatriation Facility (TRF) in 2025/26 or 2026/27 to clean £2M at 12% (£240,000) before departure. He then leaves the UK on 6 April 2026 to Bulgaria, satisfies Test 1C (full-time work overseas) for 2026/27 onwards, and pays Bulgarian 10% on his ongoing investment income. Because he has 18 of the last 20 years of UK residence, his IHT tail is 8 years. He puts £3M of life cover on his life for the tail period and gifts £325,000 to his children (nil-rate band) on departure.

The Five Most Common SRT Mistakes

1. Counting days wrong. The SRT uses a midnight count: you count a day if you are in the UK at the end of the day (midnight). Transit days are excluded only if you do not engage in any non-travel activity. A late flight arriving at 23:30 with an overnight stay is a UK day.
2. Forgetting the "exceptional circumstances" cap. Days spent in the UK due to exceptional circumstances (serious illness, family emergency) can be disregarded, but only up to 60 days per tax year. Sick weeks beyond 60 days count.
3. Misjudging the accommodation tie. A holiday home you visit twice a year still counts if it is available to you for 91+ consecutive days. Locking the property or letting it on a genuine arm's-length tenancy removes the tie.
4. Treating split year as automatic. Split-year applies only when the precise statutory conditions of one of the cases are met. Where Case 1 fails (e.g. no full-time work overseas because of a sabbatical), Case 3 may still apply, but only if the UK home is given up.
5. Ignoring the 5-year capital gains anti-avoidance rule. Section 10A TCGA 1992 brings certain gains realised during a temporary non-residence (up to 5 years) back into UK CGT if the individual returns. Plan to stay non-resident for at least 5 complete UK tax years.

Next Steps

The SRT is mechanical, but the inputs — your day-count, your ties, your departure date, your split-year case — need to be modelled before you book the flight, not after. The 2026 UK tax year (6 April 2026 — 5 April 2027) is the window where the FIG cliff edge bites for first-cohort April-2022 arrivals, and where many UK residents now contemplate the IHT residence count. Bulgaria is the EU's lowest-tax destination, eurozone since 1 January 2026, and the SRT exit to it is well-trodden.

Innovires has run UK-to-Bulgaria exits for founders, traders, retirees, consultants and FIG-rejected returners since the April 2025 reforms began. We model the SRT, prepare the split-year position, file the P85, secure the Bulgarian residence permit and tax residency certificate, and remain on standby through the IHT tail. Book a 30-minute partner consultation and we will give you a free SRT outcome model for your next three tax years.

Frequently Asked Questions