The Statutory Residence Test: When HMRC Considers You Non-Resident After Moving to Argentina

The Statutory Residence Test (SRT) is the formal mechanism that determines whether you are UK tax resident for any given tax year. It was introduced in Finance Act 2013 and replaced the older, vaguer concept of 'ordinary residence'. For British expats moving to Argentina, the SRT is the single most important piece of tax architecture to understand — because residence status determines whether HMRC can tax your worldwide income or only your UK-source income.

How the SRT works: three tests in sequence

For related context, see UK Council Tax When Moving to Argentina: What to Cancel, When, and How.

The SRT applies three tests in order. You stop at the first one that gives a definitive answer.

Test 1: Automatic Overseas Test

You are automatically non-resident if any of these apply:

• You were UK resident in one or more of the previous 3 tax years AND you spend fewer than 16 days in the UK in the current tax year
• You were NOT UK resident in any of the previous 3 tax years AND you spend fewer than 46 days in the UK
• You work full-time overseas (averaging 35+ hours/week) AND spend fewer than 91 days in the UK, with no more than 30 working days in the UK

For most British expats who have just left for Argentina, the 16-day test in year 1 is the cleanest route to automatic non-residence. If you leave in April and do not return to the UK for more than 15 days before the following April, you are automatically non-resident.

Test 2: Automatic UK Test

You are automatically UK resident if:

• You spend 183 or more days in the UK in the tax year
• Your only home is in the UK (for 91+ consecutive days, and you spend at least 30 days there)
• You work full-time in the UK for 365 days

If you have genuinely moved to Argentina and are not returning regularly, none of these should apply. But watch the 183-day count carefully if you split time between countries.

Test 3: Sufficient Ties Test

If neither automatic test gives a clear answer (you spend between 16-182 days in the UK), the SRT looks at your ties to the UK:

1. Family tie. spouse, civil partner or minor children living in the UK

2. Accommodation tie. you have a place to stay in the UK available for 91+ continuous days

3. Work tie. you do more than 3 hours of UK work on 40+ days

4. 90-day tie — you spent 90+ days in the UK in either of the 2 preceding tax years

5. Country tie (only for leavers). you were present in the UK at midnight on more days than any other single country

The more ties you have, the fewer days you can spend in the UK before becoming resident:

So if you visit the UK for 100 days but have a family home and a spouse there, you have 2 ties and are UK resident. If you visit for 50 days with 2 ties, you are non-resident.

Split-year treatment

The year you leave the UK, you may qualify for split-year treatment. This means HMRC treats part of the tax year as your UK-resident period and the rest as your overseas period. You are only taxed on worldwide income during the UK-resident portion.

Split-year treatment applies automatically when:

• You leave the UK to work full-time overseas
• You leave the UK to join a partner abroad
• You cease to have a UK home

For most Argentina movers, the "ceasing to have a UK home" case is the relevant one. If you sell or vacate your UK home when you leave, the split happens at that point and you stop being liable for worldwide UK tax from that date.

Practical implications for Argentina

If you pass the automatic overseas test (fewer than 16 days in UK):

• HMRC only taxes your UK-source income (rental income, UK dividends, UK employment)
• Your Argentine income is not taxable in the UK
• You file UK Self Assessment only if you have UK-source income above thresholds

If you are in the ties zone (16-182 UK days):

• Count your ties carefully
• Accommodation tie is the trickiest — if you keep a UK property available to you (even if rented to others with break clauses), it can count
• Family tie applies if your spouse or minor children remain in the UK

UK-source income continues to be taxable regardless of residence status:

• UK rental income: report on Self Assessment, claim allowable expenses
• UK dividends: may have withholding; claim under DTA if Argentine-resident
• UK pension: taxed under the UK-Argentina Double Taxation Agreement in the country of residence

Day-counting precision

HMRC counts days with precision:

• A "day" means you are in the UK at midnight (11:59 PM to 12:01 AM)
• Transit days (arriving and leaving on the same calendar day without staying overnight) do not count
• Days spent in the UK due to "exceptional circumstances" (illness, natural disasters) are excluded up to a maximum of 60 days

Track your UK days meticulously. Use a spreadsheet, a diary, or one of several apps designed for SRT tracking. HMRC can and does audit day counts during investigations.

The five-year rule for capital gains

Even if you are non-resident, selling UK assets within 5 years of departure may trigger UK Capital Gains Tax under the "temporary non-residence" rules. This mainly affects:

• UK property sales
• Shares in UK close companies
• Other UK-sited assets

If you sell your UK home within 5 years of moving to Argentina, CGT may still apply. Private residence relief mitigates this for your principal home, but the interaction is complex. See a cross-border tax accountant.

Common British expat SRT mistakes

1. Assuming that leaving = non-resident. It does not. You must pass one of the automatic tests or the ties test.

2. Keeping a UK property "just in case." If it is available for your use for 91+ days, it creates an accommodation tie.

3. Not counting short UK visits. Every overnight stay counts toward the 16/46/90/120/183 thresholds.

4. Ignoring the family tie. If your spouse or children remain in the UK, that tie persists even after you move.

5. Thinking the P85 form determines residence. It does not. The SRT determines residence; P85 just tells HMRC you have left.

Not tax advice. The SRT is genuinely complex for people with mixed UK-Argentine lives. A chartered accountant with international tax experience is essential if you have significant UK assets or income.

Worth reading next

• UK Council Tax When Moving to Argentina: What to Cancel, When, and How
• UK ISAs After Moving to Argentina: What Happens to Tax-Free Savings
• Getting a CUIT as a UK Buyer: Tax ID for Argentine Property Purchases