UK Tax on Foreign Income After Leaving: Cross-Border Rules

Non-resident UK tax position

Once UK non-resident under the Statutory Residence Test, the UK generally taxes only UK-source income: UK employment income, UK rental income, UK pensions, UK dividends and interest (subject to disregarded income rules), UK property gains.

Foreign-source income (employment abroad, foreign pensions, foreign investments, foreign property) is generally outside the UK tax net for non-residents. The country of residence typically taxes worldwide income, including the UK-source elements, subject to the treaty.

Year of departure: split-year treatment

Split-year treatment under Part 3 of Schedule 45 Finance Act 2013 treats the year of departure as two parts: a UK part (resident, taxed on worldwide income) and an overseas part (non-resident, taxed on UK-source income only).

Where split-year applies, foreign income arising in the overseas part is not subject to UK tax. This is significantly more favourable than full-year residence, which would tax the whole year's foreign income.

Temporary non-residence rules

Where a UK tax resident becomes non-resident for a period of less than 5 complete tax years (temporary non-residence), some gains and certain income types realised during the absence are brought back into UK tax on return. The rule prevents short-term flight from CGT and certain income.

The rule applies to specific categories: capital gains on assets held at departure, some distributions from close companies, lump sum pension withdrawals, and some other items. Most foreign income (employment, rental, dividends from non-close companies) is not caught.

UK source income that remains taxable

Non-residents continue to pay UK tax on UK rental income (via the NRL Scheme), UK pensions (subject to treaty allocation), UK-source employment income (for any continued UK work), gains on UK property (via NRCGT) and some other UK-source items.

The disregarded income rules in section 811 ITA 2007 limit UK tax on UK dividends and interest received by non-residents to the amounts withheld at source (typically nil for UK companies). Most UK dividend and interest income for non-residents is effectively UK tax-free.

Country of residence's worldwide tax position

Most countries tax their residents on worldwide income, including UK-source income. The Double Taxation Treaty between the UK and the country of residence determines how double taxation is avoided.

Typical treaty allocation: UK property income and gains - UK has primary taxing rights, country of residence taxes with credit. Pensions - usually country of residence has primary rights, UK reduces tax accordingly. Dividends and interest - usually country of residence has primary rights, with limited UK withholding.

Reporting and compliance

Year of departure: the self-assessment tax return covers the UK part of the year (resident) and reports the split-year claim. P85 notifies HMRC of departure.

Subsequent years as non-resident: self-assessment may still be required if UK-source income exceeds certain thresholds or if the landlord is in the NRL Scheme. The country of residence's tax filings cover worldwide income including the UK-source elements.

Specialist cross-border tax advice is the norm for departures involving substantial assets, income or complex residence patterns. The first year of non-residence is the most complex; subsequent years stabilise.

Frequent scenarios after departure

Retired abroad with UK pension and rental income: UK self-assessment for the rental income (NRL Scheme), country of residence taxes the worldwide position with credit for UK tax. The position is generally manageable with annual reporting.

Working abroad with UK investments: most UK investment income is disregarded for non-residents. Country of residence taxes the worldwide position. Simple if no UK property; more complex with UK property.

Returning to the UK within 5 years: temporary non-residence rules may bring some gains realised during the absence into UK tax on return. Planning the timing of disposals is part of cross-border tax management.

UK-source income that remains taxable after departure

UK rental income: under the NRL Scheme. The landlord files annual self-assessment for the rental year. Tax is paid via self-assessment or through NRL withholding (where rent gross approval is not in place).

UK pensions: subject to the DTT with the country of residence. Most DTTs allocate taxing rights to the country of residence; the UK applies an NT (no tax) code. Some DTTs have specific State Pension or government pension provisions.

UK employment income from continued UK employment: where the leaver continues to do work in the UK after departure (occasional travel back, remote work physically in the UK for periods, secondment). The UK source character is determined by where the work is performed.

UK dividends and interest: subject to disregarded income rules under section 811 of the Income Tax Act 2007. Practical UK tax is typically nil for non-residents on most UK dividends and interest.

UK property gains: subject to NRCGT on disposal. The 60-day return filing and standard NRCGT calculations apply.

Split-year treatment in the year of departure

Eight Cases for split-year: Part 3 of Schedule 45 FA 2013 specifies the conditions for each Case. Case 1 (full-time work overseas), Case 2 (partner of Case 1 worker), Case 3 (ceasing to have UK home), and the arrival Cases 4-8.

Tax treatment under split-year: the year is treated as part UK (resident) and part overseas (non-resident). UK-source income in the overseas part is taxed under non-resident rules; UK-source income in the UK part is taxed under standard rules.

Foreign income in the overseas part: not UK-taxable under split-year treatment. This is the key benefit; without split-year, full-year residence would tax the whole year's foreign income.

Conditions and elections: each Case has specific conditions on timing and circumstances. The HMRC RDR3 manual provides detailed guidance; the conditions are not always intuitive.

Application: in the year-of-departure self-assessment tax return. The relevant Case is identified and the split-year position is claimed. HMRC reviews and accepts (or queries) the claim.

Temporary non-residence: scope and consequences

Scope: applies to UK residents who become non-resident for less than 5 complete tax years. The 5-year test is the threshold; absences of 5 or more complete tax years remove the temporary non-residence treatment.

Categories of income/gains caught: capital gains on assets held at departure (TCGA 1992 section 10A), distributions from close companies (where specific conditions apply), lump sum pension withdrawals, certain employment-related securities. Each has its own specific rules.

Income not caught: most foreign employment income, rental income from foreign property, dividends from foreign companies, interest from foreign bank accounts. Standard non-resident treatment applies to these.

Returning before 5 years: the temporary non-residence applies. Gains and certain income realised during the absence are reported on the year-of-return self-assessment and taxed.

Planning around the 5-year mark: those with significant pre-departure gains and a possible UK return often plan to stay non-resident for at least 5 complete tax years. The day count for SRT must be carefully managed.

Country of residence's worldwide tax position

Most countries: tax their residents on worldwide income. The country of new residence typically taxes UK-source income (rental, pension, employment if any) under its rules.

Double Taxation Treaty: the bilateral DTT between the UK and the country of residence allocates taxing rights and provides relief. The treaty's specific articles cover each income type.

Credit method: most DTTs use the credit method for relief. The taxpayer pays tax in both countries (where each has taxing rights) and claims credit for the tax paid in the other country against the home country's tax on the same income.

Exemption method: some DTTs use exemption for specific income types. The income is taxed only in one country; the other country exempts it. Less common than credit method.

Treaty network: UK has DTTs with over 130 countries. Each treaty has its own specific provisions; the general principles are similar but specific articles vary.

Practical compliance for the post-departure years

Year of departure: self-assessment covers the UK part of the year and reports the split-year position. P85 has been filed; the return reflects the departure timing.

Subsequent years as non-resident: self-assessment may still be required if UK-source income exceeds the threshold (rental income, certain pensions, UK employment days). The return is filed annually; the income is reported and tax paid or refunded.

Country of residence's filings: cover worldwide income including UK-source elements. UK-source income is reported with documentation (P60 for any UK employment, NRL agent statement for rental, pension statements) and the DTT applied for relief.

Coordination: many cross-border individuals use the same adviser to coordinate UK self-assessment and country of residence filing. Specialist cross-border tax accountants (typically with affiliations in both countries) provide the service.

Risks of poor compliance: HMRC penalties for late or incorrect UK filings; country of residence penalties for failing to report worldwide income; double taxation where treaty relief is not properly claimed.

Year-of-departure tax management

Split-year planning: Case 1-3 typically apply for departures (work overseas, partner of worker, ceasing UK home). The Case that applies determines the split date.

P85 notification: form filed with HMRC notifying departure. The form is on GOV.UK; the personal tax account also reflects the change of residence.

Year-of-departure return: the self-assessment for the tax year of departure covers the UK part (resident) with the split-year claim. Foreign income in the overseas part is not UK-taxable.

Specialist cross-border tax advice: useful for departures with complex income (multiple income sources, property gains, pension actions, business interests). The advice covers both UK and country of residence positions.

Subsequent years as non-resident: self-assessment may still be required for UK-source income. Coordinated with the country of residence's tax filings.

Cross-border tax planning for ongoing UK tax position

Statutory Residence Test (SRT): determines UK tax residence on a year-by-year basis. The automatic overseas tests, automatic UK tests, and sufficient ties tests in Schedule 45 FA 2013 give the framework.

Split-year treatment: applies to the year of departure or arrival where conditions are met. Cases 1-8 cover the specific scenarios; the year is treated as part UK (resident) and part overseas (non-resident).

Double Taxation Treaty: bilateral agreement between the UK and the country of residence allocates taxing rights and provides relief. Most DTTs use the credit method; the UK or country of residence taxes with credit for tax paid in the other.

Non-resident UK tax: continues on UK-source income (rental, pensions, property gains) after departure. UK dividends and interest are typically subject to disregarded income rules with no UK tax for non-residents.

Temporary non-residence: gains realised during absence of less than 5 complete tax years can be brought back into UK tax on return. Planning the absence period and the timing of gains is part of cross-border tax strategy.

Using GOV.UK and official sources effectively

GOV.UK as the primary source: the UK government's single online portal for most public services. Immigration Rules, caseworker guidance, current fees and IHS rates, application forms, and updates are all on GOV.UK. The site is the authoritative reference for any current rule or process.

Subscribing to updates: GOV.UK allows email subscriptions to specific topics including immigration. Updates arrive when guidance is amended or new Statements of Changes are published. Practitioners and engaged applicants commonly subscribe.

Statements of Changes (SoCs): published on GOV.UK as PDF documents. Each SoC has a HC number identifying it; recent SoCs HC 590 of 2023, HC 1496 of 2023, HC 246 of 2024 introduced significant changes. The consolidated Immigration Rules on GOV.UK reflect the current text after all SoCs.

Modernised caseworker guidance: published separately from the Rules. Covers practical application; not binding but highly influential. Updates flow through new versions with effective dates.

ONS, HMRC and other primary data: GOV.UK aggregates data from across government. ONS migration statistics, HMRC tax and customs data, sectoral statistics from departments. The data underlies policy decisions and is publicly accessible.

Disclaimer

This article provides general information about UK tax rules and is not personal tax advice. Cross-border tax treatment depends on individual circumstances, residence status and any applicable double-taxation treaty. HMRC guidance changes; readers should check the current GOV.UK manuals and consider taking advice from a qualified tax adviser.

Frequently asked questions

Do I pay UK tax on foreign income after leaving the UK?

Generally no. UK non-residents are taxed on UK-source income only, not on worldwide income. Foreign-source income (employment, pensions, investments, property abroad) is outside the UK tax net for non-residents.

What is split-year treatment?

A treatment under Part 3 of Schedule 45 Finance Act 2013 that splits the tax year into a UK part (resident, taxed worldwide) and an overseas part (non-resident, taxed on UK-source only) where defined Cases 1-8 apply. Common in the year of departure or arrival.

What is temporary non-residence?

A rule that brings some gains and certain income types realised during a short absence (less than 5 complete tax years) back into UK tax on return. The rule prevents short-term flight from CGT and some other taxes.

Will my foreign country tax UK income?

Most countries tax their residents on worldwide income, including UK-source income. The Double Taxation Treaty between the UK and the country of residence allocates taxing rights and provides credit for tax paid in the other country.

Do I still need to file UK tax returns after leaving?

Self-assessment may still be required if you have UK rental income (NRL Scheme), UK property gains, UK pension income above the personal allowance threshold, or other UK-source income above relevant thresholds. The first year after departure is typically the most complex.

Frequently asked questions

Do I pay UK tax on foreign income after leaving the UK?

Generally no. UK non-residents are taxed on UK-source income only, not on worldwide income. Foreign-source income (employment, pensions, investments, property abroad) is outside the UK tax net for non-residents.

What is split-year treatment?

A treatment under Part 3 of Schedule 45 Finance Act 2013 that splits the tax year into a UK part (resident, taxed worldwide) and an overseas part (non-resident, taxed on UK-source only) where defined Cases 1-8 apply. Common in the year of departure or arrival.

What is temporary non-residence?

A rule that brings some gains and certain income types realised during a short absence (less than 5 complete tax years) back into UK tax on return. The rule prevents short-term flight from CGT and some other taxes.

Will my foreign country tax UK income?

Most countries tax their residents on worldwide income, including UK-source income. The Double Taxation Treaty between the UK and the country of residence allocates taxing rights and provides credit for tax paid in the other country.

Do I still need to file UK tax returns after leaving?

Self-assessment may still be required if you have UK rental income (NRL Scheme), UK property gains, UK pension income above the personal allowance threshold, or other UK-source income above relevant thresholds. The first year after departure is typically the most complex.