How to Leave the UK Tax System Properly
Leaving the UK tax system involves more than getting on a plane. It is a sequence of administrative and structural steps that, taken in the right order at the right time, give you a clean tax position from year one. Skipped or done late, the same steps create avoidable HMRC enquiries five years later — usually triggered by something else entirely (a property sale, a return to the UK, a self-assessment inconsistency) that brings the original departure under scrutiny.
This article walks through the practical departure checklist for a UK founder relocating to Dubai — what to file, when, and what comes next.
Pre-departure: structural decisions
Before the administrative housekeeping, the structural decisions need to be made. Most of these are covered in detail in our companion articles:
Personal residence and split year. Identify the SRT route you will rely on (typically the third automatic overseas test) and the split year case (typically Case 1 for working founders, Case 3 for those without overseas employment). Work back from those to the practical departure date and post-arrival working pattern. Detail in The UK Statutory Residence Test Explained and Split Year Treatment Explained.
UK home. Decide whether to sell, let on a real tenancy, or otherwise make unavailable. Available accommodation triggers the SRT accommodation tie and complicates Case 3 split year. Most founders we work with sell or let on a 12-month-plus tenancy before departure.
UK Ltd. Decide between keep, migrate, sell, or restructure. Detail in Moving a UK Business to Dubai.
UAE side. Trade licence, free zone, residence visa, banking shortlist all scoped before departure.
With those decided, the administrative side becomes a checklist rather than a series of judgements.
The P85 — notify HMRC of departure
Form P85 is the standard notification to HMRC that you have left, or are leaving, the UK. It is not what makes you non-resident — that is determined by the SRT — but it is the document that opens the conversation with HMRC about your departure year.
Filing P85 typically does three things: notifies HMRC of your departure date and new residence; allows you to claim a refund of any UK income tax overpaid in the year of departure (PAYE often over-deducts on the assumption of a full year of UK earnings); and adjusts your UK tax code for any continuing UK employment income to reflect non-resident status.
P85 can be filed online or by post. The form asks for your departure date, expected duration overseas, employment details, expected UK income, and details of any UK property remaining. It can be filed shortly before or shortly after departure.
For a founder who is within self-assessment (which most are, given UK Ltd directorships, property income, or other complexity), P85 alone is not enough — you also confirm your residence position and claim split year on the year-of-departure tax return.
Self-assessment for the year of departure
The tax return for the UK tax year in which you leave is critical. It does several things in one document: confirms your residence status under the SRT (resident, non-resident, or split year); claims split year treatment under the relevant case (typically Case 1 or Case 3); reports UK and worldwide income for the UK part of the year; reports UK-source income only for the overseas part of the year; calculates any UK tax due and any refund owed.
The return is filed under the standard self-assessment timetable — by 31 January following the end of the relevant tax year (so the 2026/27 return is due by 31 January 2028). Earlier filing is allowed and often advisable to lock in any refund and close the residence position.
Specifically for the year of departure, the return uses supplementary pages — primarily SA109 (Residence, Remittance Basis, etc.) — to capture the residence claim. SA109 is where the split year case is identified, the split date stated, and the working basis for the SRT confirmed.
For founders, the year-of-departure tax return is rarely a DIY exercise. We treat it as a specialist UK tax piece, typically completed by the same UK adviser who scoped the SRT and split year position from the start.
NT (No Tax) tax code for continuing UK employment
If you continue to receive UK employment income after relocating — perhaps as a non-executive director of your former UK Ltd, or as an employee of a UK company on continuing UK workdays — the default PAYE treatment will deduct UK tax at the standard rates. For a non-resident with no UK workdays, this is over-deduction.
The NT tax code (No Tax) instructs the UK employer to apply nil PAYE deduction. It can be applied for through HMRC, supported by your residence position and the proportion of duties performed outside the UK. The application typically follows P85 filing, and the NT code is granted for forward periods rather than retrospectively.
For continuing UK directorships, it is common to draw nil salary from the UK Ltd post-relocation and rely on dividend extraction (which has limited UK tax cost for non-resident shareholders) instead of a salaried structure that requires NT code maintenance. The exact answer depends on the amounts and the surrounding structure.
Non-resident landlord scheme — for any continuing UK property income
If you continue to own and let UK rental property after relocating, the non-resident landlord (NRL) scheme governs how the UK rental income is taxed. By default, your UK letting agent (or your tenant, if you have no agent) is required to deduct UK tax at the basic rate (20%) on the rental income at source.
To receive rental income gross (without withholding), you can apply to HMRC for approval under the NRL scheme. Approval is generally granted where you have a clean UK tax compliance record and have undertaken to file UK self-assessment for the rental income. Once approved, the agent or tenant pays you the rent without deduction, and you account for the UK tax via your self-assessment return.
NRL approval is not retrospective — you need to apply before the income starts being paid (or shortly thereafter). For a relocating founder with a UK rental property, NRL scheme registration is one of the standard departure-time administrative actions.
UK pension considerations
UK pensions remain a UK tax matter for non-resident retirees in most cases. The UK–UAE treaty does not give the UAE primary taxing rights over most UK pension income.
For founders some years from drawing pension, the practical departure-time considerations are limited:
Continuing UK pension contributions after non-residence are typically not eligible for UK tax relief (relief is generally limited to relevant UK earnings, and a non-resident with no UK earnings has no relevant earnings). State pension entitlement can be maintained through voluntary Class 2 or Class 3 National Insurance contributions during the non-resident period — typically valuable for founders some years from state pension age. Pension transfers (QROPS) are a specialist area; the rules have changed materially in recent UK Budgets and the cost-benefit of a transfer is fact-specific. We treat pension transfers as a separate planning question and would not default-recommend one.
UK National Insurance after departure
UK National Insurance has its own residence rules separate from the SRT. For a founder ceasing UK employment on departure, NI contributions stop with the employment.
For continuing UK self-employment or UK directorships, NI rules can be complex, particularly in the first year. The 52-week continuation rule for UK employees moving overseas is the most common edge case to watch for.
Voluntary contributions (Class 2 for the self-employed, Class 3 for others) remain available to maintain UK state pension entitlement during the non-resident period. For founders with substantial accumulated NI history but some way to go to qualifying years, voluntary contributions can be cost-effective.
UK assets and the temporary non-residence rule
For founders with substantial UK assets — shares in private companies, investment portfolios, large rental property holdings — the temporary non-residence rule should be in scope of the planning.
The rule operates as follows: if you become non-UK resident, then return to UK residence within five tax years, certain gains and income realised during the non-resident period are reassessed to UK tax in the year of return. The categories include disposals of assets owned at the time of departure, distributions from close companies, and certain pension events.
The practical implication: a relocation expected to last fewer than five years requires deliberate planning around any major one-off transactions during the non-resident period. The UK CGT exposure on a private company share sale, for example, can be triggered retroactively if you return within the five-year window. Detail in Can HMRC Still Tax You After Moving to Dubai?
UK property — the specific exposure that doesn’t go away
UK residential property is the asset class where non-residence does not provide a CGT shelter. Non-resident CGT applies to disposals of UK residential property by non-resident individuals at the standard CGT rates (currently 18% / 24% for residential property as of 2026, with rates having shifted in recent UK Budgets).
For founders selling a UK home as part of relocation, the timing of the sale relative to departure matters. Pre-departure sale: principal private residence relief may apply, often eliminating the CGT charge. Post-departure sale: PPR relief may still apply for the period of UK residence, but the rules are detailed and require specialist input.
UK rental property continuing to be held generates ongoing UK rental income (NRL scheme) and a future CGT exposure on eventual sale. Holding UK rental long-term as a non-resident is workable but not tax-free.
UK inheritance tax — now residence-based, not domicile-based
From 6 April 2025, the UK moved to a residence-based inheritance tax regime, replacing the older domicile concept that had governed IHT scope for decades. The new test is “long-term resident” status: you are within the UK IHT net on worldwide assets if you have been UK tax resident in 10 of the previous 20 tax years.
For founders leaving the UK, the practical implication is the IHT “tail” — the period for which you remain within UK IHT after physically leaving. The tail is a minimum of 3 tax years (for founders who were UK resident in 10 to 13 of the prior 20 years) and rises by one year for each additional year of UK residence, up to a maximum of 10 years. So a founder who has been UK resident for 20 of the last 20 years carries a 10-year IHT tail after departure; a founder with shorter UK residence history carries a shorter tail.
For founders with substantial estates, particularly those with deep UK residence history, IHT planning is a separate workstream from income and CGT residence work and benefits from specialist UK input. The new regime also affects trust structures — trusts settled by long-term residents are within UK IHT, with periodic and exit charges.
Financial accounts and reporting
UK and UAE both participate in the OECD Common Reporting Standard (CRS). UK banks report account information for non-UK residents to the relevant home tax authority (the UAE FTA for UAE-resident UK bank account holders). UAE banks report on UK-resident account holders to HMRC. CRS is the data layer that makes residence inconsistencies visible to tax authorities; founders who say they are non-UK resident but have a UK banking footprint that suggests otherwise create exactly the data signature CRS surfaces.
Practical implication: update your UK bank with your new residence status promptly after departure. The bank will move you to a non-resident product, may close some account types, and will report your account to the UAE FTA going forward. The UK side of the CRS reporting is then consistent with your UK tax position.
The departure checklist — practical sequence
Pulled together, the typical sequence for a founder relocating from the UK to Dubai:
Months -3 to -1: Confirm SRT and split year route. Confirm UAE side (visa, company, banking shortlist). Make decisions on UK home (sell, let, retain) and UK Ltd (keep, migrate, sell, restructure). Begin UK Ltd actions (sale process, wind-down, restructuring documentation). Begin UAE company formation and visa process.
Around departure date: Receive UAE residence visa. File P85 with HMRC. Update UK bank with new residence status and overseas address. Apply for NT tax code if continuing UK employment income. Apply for non-resident landlord scheme approval if continuing UK rental property.
Months +1 to +3: Receive UAE Emirates ID. Open UAE bank account. Confirm new residential lease in UAE for permanent residence record (Ejari registration in Dubai). Begin tracking UAE day count.
Months +4 to +6: Cross UAE 90-day threshold (most founders). Apply for UAE Tax Residency Certificate via FTA EmaraTax portal. Continue UK day-count discipline.
Months +6 to +12: UAE corporate tax registration. UAE QFZP / SBR election decided for first tax period. UK self-assessment for departure year prepared (filed by 31 January following the relevant year-end).
Year 2 onwards: Annual UAE TRC renewal. Annual UAE corporate tax return. Annual UK self-assessment if there is continuing UK income or property. Continued UK day-count discipline through the temporary non-residence five-year window.
What “doing it properly” looks like, summarised
The cleanest UK departures we see share a recognisable shape:
The structural decisions are made before the move, not after. Personal residence, company position, UK home, UK Ltd, UAE side — all scoped and aligned on a single timeline. The administrative actions are taken at the right time, not rushed at year-end. P85 within weeks of departure, NT and NRL applications promptly, UAE visa and Emirates ID sequenced, TRC application as soon as eligible. The day count is tracked from day one. UK days, UK workdays, UAE days — in a simple personal record cross-checked annually. The first UK self-assessment after departure properly claims split year and confirms residence position. Specialist UK tax input is taken before the move on the year-of-departure return preparation, not after. UK property, pension, IHT and other specific exposures are assessed individually rather than assumed away. The first five years post-departure are treated as the temporary non-residence window — major one-off transactions are timed deliberately.
None of this is exotic. It is the structural and administrative housekeeping that turns “I moved to Dubai in 2026” from a casual claim into a properly documented and defensible tax position. The cost upfront is a few weeks of planning and a few hundred pounds of administrative filings. The cost of skipping it is a HMRC enquiry years later that has all the time it needs to find what was missed.
FAQs
When should I file a P85?
Shortly before or shortly after physically leaving the UK. P85 notifies HMRC of your departure date, allows any over-deducted PAYE in the year of departure to be refunded, and adjusts your tax code for any continuing UK employment income. There is no specific deadline, but earlier is better — it closes the loop with HMRC and starts the administrative side of your departure cleanly.
Do I still file a UK tax return after I leave?
Yes — at least for the year of departure (to confirm residence and claim split year), and for any subsequent year in which you have UK-source income (rental income, UK directorships, UK pension income, UK capital gains). Founders with no continuing UK income may eventually drop out of self-assessment after a few years; those with continuing UK property or directorships will not.
What’s an NT tax code?
NT (No Tax) is the PAYE tax code instructing a UK employer to apply nil tax deduction at source. It applies for non-resident employees with no UK workdays, where standard PAYE would over-deduct. The NT code is applied for through HMRC after departure, supported by the residence position and duties location.
Do I need to register as a non-resident landlord if I keep UK property?
If you continue to receive UK rental income after relocating, the non-resident landlord (NRL) scheme applies. By default, your letting agent or tenant deducts 20% UK tax from the rental income at source. To receive the rent gross, you apply for NRL approval from HMRC, which is generally granted to landlords with a clean UK tax compliance record. You then account for the rental income via UK self-assessment.
Can I claim a tax refund when I leave the UK?
Often yes — particularly if you leave part-way through a tax year and your PAYE deductions were calculated on the assumption of a full year of UK earnings. P85 prompts HMRC to recalculate and refund any over-deducted tax. The refund is processed through the next available payroll cycle or by direct payment.
What about my UK National Insurance contributions?
UK NI contributions stop with UK employment ceasing on departure. Voluntary Class 2 (for self-employed) or Class 3 (general) contributions can be made during the non-resident period to maintain UK state pension entitlement. For founders some years from state pension age but with substantial accumulated NI history, voluntary contributions to fill any gap can be cost-effective.
Will I lose my UK pension if I move to Dubai?
No. Your UK pension entitlement is preserved — accrued benefits remain payable when you reach pension age, and UK state pension is paid to you in the UAE (subject to the UK rules on non-resident state pension). What changes is the tax treatment of contributions (UK relief generally not available without UK earnings) and ongoing planning options. Existing pensions remain UK-taxable in most cases under the UK–UAE treaty.
Should I tell my UK bank I’ve moved?
Yes — promptly. UK banks are required to know their customers’ tax residence status under CRS, and your overseas residence is reportable to the UAE FTA. The bank will move you to a non-resident product (some account types may not be available), and the CRS reporting will then match your UK tax filing. Failing to update the bank creates an inconsistency that surfaces later.
What if I sell my UK home after I leave?
Non-resident CGT applies to disposals of UK residential property by non-resident individuals. Principal private residence relief may apply for the period of UK residence (and a final qualifying period, currently 9 months). The post-departure period is in scope of CGT. Timing of the sale, both pre- and post-departure, has different CGT consequences and benefits from specialist UK input.
Does HMRC follow me to Dubai?
HMRC’s tax claim follows you for any UK-source income you continue to earn (UK property rental, UK dividends in some cases, UK pension income), and for any UK gains realised within scope. HMRC’s information access also follows through CRS — UAE banking activity is reported to HMRC for UK-resident account holders, and to the UAE FTA for UAE-resident account holders. HMRC does not “follow” non-residents on UAE-source income; the tax claim is on UK-source income only.
What’s the temporary non-residence rule?
If you leave the UK, become non-resident, and return to UK residence within five tax years, certain gains and income realised during the non-resident period are reassessed to UK tax in the year of return. Categories include disposals of assets owned at departure, close company distributions, and certain pension events. A relocation expected to last fewer than five years requires deliberate planning around any major one-off transactions in the non-resident window.
Can I prepare the year-of-departure UK tax return myself?
Technically yes, but for most founders we would not recommend it. The departure-year return is the document that confirms your residence position and claims split year — it is the legal foundation on which your subsequent tax position rests. Mistakes are not always cheap to fix later. Most founders we work with use a UK tax adviser for the departure-year return, with self-prep returning in subsequent years if the position is straightforward.
How long should I keep UK tax records after leaving?
HMRC’s discovery powers extend to four years from the end of the relevant tax year in normal cases, six years for carelessness, and twenty years for deliberate behaviour. We would recommend keeping departure-year records — SRT day counts, P85 confirmation, departure return and supporting documents, NRL approval, NT code letters, TRC application records, UAE residence and visa documents — for at least seven years and ideally longer for the first five (temporary non-residence) years.
What if I miss the P85 or other administrative steps?
P85 is not strictly mandatory — your residence is determined by the SRT, not by P85 filing. Missing P85 doesn’t make you UK resident; it just leaves an administrative gap that HMRC will pick up later. NRL approval can be applied for retrospectively, but only after withholding has been applied. NT codes are forward-looking and not retrospective. The general principle is that delays accumulate cost rather than create permanent damage — but cleaning them up later is more work than doing them at the time.
How does the firm coordinate UK and UAE tax work for relocations?
UK qualified tax input is held in-house alongside the UAE side, so the SRT, split year, and year-of-departure return work happens in coordination with UAE company formation, visa, banking and TRC. The two sides are designed together rather than sequenced — typical relocation engagement covers the structural decisions, the UAE setup, the UK departure administration, and the first UAE-resident tax cycle as one coordinated workstream.
Where to read next
For HMRC’s reach after departure: Can HMRC Still Tax You After Moving to Dubai? For SRT mechanics: The UK Statutory Residence Test Explained. For split year: Split Year Treatment Explained. For UAE residency on the other side: UAE Tax Residency for UK Business Owners. For the company-side decision: Moving a UK Business to Dubai.
Disclaimer: This article is intended for general informational purposes only and is based on regulations, policies, and practical experience at the time of writing. While we aim to keep all information accurate and up to date, business, banking, tax, and compliance requirements can change and may differ depending on individual circumstances.
Nothing contained in this article should be considered formal legal or financial advice. If you are unsure how any information may apply to your situation, we recommend seeking advice from a suitably qualified professional.
