Leaving the UK? What the Temporary Non-Residence Rules, Post-Departure Profit Traps, and the Abolition of the Notional Dividend Tax Credit Mean for You

For many UK residents, whether entrepreneurs looking to monetise a business sale, high earners seeking a period of tax efficiency, or individuals relocating permanently leaving the UK can appear to be the obvious solution to a growing UK tax burden. 

However, the rules governing temporary non-residence are some of the most misunderstood and misjudged areas of UK tax planning. Get them wrong, and income or gains you believed were safely outside the UK tax net can follow you home.

This blog sets out how the temporary non-residence rules work, explains the significant changes introduced by the recent Budget targeting post-departure profits from close companies, and covers the upcoming abolition of the notional dividend tax credit announced in the latest Budget. 

What Are the Temporary Non-Residence Rules?

In broad terms, they operate as an anti-avoidance mechanism designed to prevent individuals from leaving the UK, triggering gains or extracting income that would otherwise be taxable in the UK, and then returning after a short period abroad.

The key trigger is the length of absence. If an individual leaves the UK and returns within five complete UK tax years, they are treated as temporarily non-resident.

Any chargeable gains realised on the disposal of assets during the period of non-residence are brought back into charge in the tax year of return as if those gains had been made in that year. The same logic applies to certain types of income.

Practical example: 

A shareholder leaves the UK in October 2024, sells shares in a trading company in January 2026 and crystallises a gain of £1.8 million, then returns to the UK in March 2029. Despite realising the gain as a non-resident, the entire gain is assessed on them in 2028/29 - the year of return. There is no exemption.

The five-year rule applies from the year of departure to the year of return, measured in complete tax years. Careful structuring around the split year provisions and the Statutory Residence Test (SRT) tie-breaker tests is essential before any planning is undertaken.

Assets and Income Caught by the TNR Rules

Not all assets and income are subject to the TNR rules but the scope is broader than many people assume. On the capital gains side, the rules catch gains on the disposal of assets held at the point of departure, together with assets acquired during the period of non-residence and disposed of before return.

Assets within a trust or personal portfolio company may also fall within scope depending on structure.

On the income side, the TNR rules target specific categories including distributions from close companies, certain employment-related income, and income from pension arrangements.

It is in the close company distribution category where the recent Budget introduced the most significant change.

Post-Departure Profits: The Budget 2025 Changes

Prior to the Autumn Budget 2025, owner-managed business shareholders in a close company could, in some circumstances, time dividend distributions after their departure from the UK in order to receive them as a non-resident where UK income tax would not apply.

This was a recognised, if increasingly scrutinised, planning opportunity particularly for entrepreneurs who had built up significant retained profits before leaving.

The Budget closed this window. New provisions now treat distributions from a close company as arising in the period of temporary non-residence and bring them into charge on return, where those distributions relate to profits that had accumulated before the individual's departure.

In effect, the legislation looks through the timing of the distribution and asks: when did those profits arise?

The key test is whether the profits underlying the distribution accrued during the UK residence period. If they did, HMRC can assess the dividend income on the returning individual regardless of when it was actually paid out.

This change has materially altered the planning landscape for business owners considering a period of non-residence. Where previously the sequencing of a dividend paying it after departure offered a degree of shelter, that shelter has now largely been removed for close company shareholders within the five-year window.

Those with longer-term non-residence plans of over five complete tax years may still be able to extract profits free of UK income tax, but this requires genuine, sustained non-residence and careful documentation to demonstrate that the SRT conditions are met throughout.

The Notional Dividend Tax Credit

To understand what is being removed, it is necessary first to understand the existing mechanism. Non-UK residents with UK-source income do not generally pay UK income tax on all of that income in the same way a UK resident would.

However, the position becomes more nuanced where a non-resident has more than one category of UK income — specifically, where they receive both UK dividend income and UK rental or partnership income.

In that situation, HMRC permits the non-resident to calculate their UK tax liability using whichever of two alternatives produces the lower charge.

Under Alternative 1, all UK income is brought into assessment, the personal allowance may be given depending on client’s circumstances and legislation under the Income Tax Act grants a notional tax credit equal to the Ordinary Rate of dividend tax (currently 8.75%) applied to the gross dividend income. Under Alternative 2, only the UK rental or partnership income is assessed, with dividend income being disregarded but the personal allowance is not available.

The credit was originally introduced to mirror the tax credit that attached to UK dividends under the old imputation system; the idea being that dividends had already borne corporation tax at source and the individual should not be taxed again.

That underlying rationale disappeared when the UK resident dividend tax credit was abolished, but the credit was inadvertently left on the statute book for non-residents. Its removal is therefore a tidying-up exercise in policy terms, but the financial impact on affected individuals is real.

The Change: What the Autumn Budget 2025 Announced

The Autumn Budget 2025 announced the repeal of section 399 ITTOIA 2005 in its entirety.

The measure will take effect for distributions received on and after 6 April 2026, meaning the current tax year (2025/26) is unaffected but planning for 2026/27 onwards should begin now. 

HMRC estimates that fewer than 1,000 non-resident individuals per year are directly affected ,a relatively small population, but one that is disproportionately represented among the kind of high-net-worth internationally mobile clients who retain UK property portfolios and UK equity holdings after leaving the UK.

For that group, the practical impact on their annual UK tax position can be significant.

Worked Example: Before and After 6 April 2026

To illustrate the impact, consider the following scenario. Margaret is a UK national now resident in the United States. She holds a UK buy-to-let property generating £20,000 net rental income per year, and a UK equity portfolio paying £30,000 in dividends annually. She is entitled to the UK personal allowance of £12,570.

	Before 6 April 2026	After 6 April 2026
Client Profile
UK rental income	£20,000	£20,000
UK dividend income	£30,000	£30,000
Personal allowance	£12,570	£12,570
Alternative 1 — All UK income assessed
Taxable rental income (after PA)	£7,430	£7,430
Tax on rental @ 20%	£1,486	£1,486
Dividend nil rate band	(£500)	(£500)
Taxable dividends @ 8.75%	£2,581	£2,581
Total tax before s.399 credit	£4,067	£4,067
s.399 notional tax credit (8.75% × £30,000)	(£2,625)	NIL
Tax under Alternative 1	£1,442	£4,067
Alternative 2 — Rental income only, no personal allowance, dividend income disregarded
Tax on £20,000 rental @ 20%	£4,000	£4,000
Tax under Alternative 2	£4,000	£4,000
Outcome — Best Alternative Selected
Alternative chosen	Alt 1	Alt 2
UK income tax liability	£1,442	£4,000
Additional tax cost from s.399 abolition	-	£2,558

The table shows how the abolition of the section 399 credit changes not just the quantum of tax but the entire calculation. Before 6 April 2026, Margaret benefits from Alternative 1: her dividend income is brought into the assessment alongside her rental income, the personal allowance reduces her rental liability, and the notional credit eliminates most of the dividend tax producing a total UK tax bill of £1,442. 

After 6 April 2026, with no credit available, Alternative 1 produces a tax bill of £4,067, which is worse than Alternative 2 (rental only, no allowance, at £4,000). Margaret therefore defaults to Alternative 2, paying £4,000 an increase of £2,558 on her current position.

It is worth emphasising that this is an annual recurring cost. Over a five-year period, assuming stable income levels, the cumulative additional UK tax burden in this example is £12,790. For clients with larger rental portfolios or more substantial dividend income, the numbers increase accordingly.

Planning Considerations

Given the breadth of these changes, there are several areas where early advice is critical:

• Review the two-alternative calculation now: for clients approaching 6 April 2026 it is beneficial to quantify the increase in their UK tax position and model whether any restructuring of their UK income is warranted before the change takes effect.

• Portfolio restructuring: consider whether retaining UK-listed equities directly is still the most efficient approach, or whether holding UK dividend-yielding investments through an offshore wrapper (such as an offshore bond) would shelter future dividend income from the UK tax calculation entirely.

• Departure date and split-year treatment: for those yet to leave, the timing of departure relative to the tax year can significantly affect which assets are within the TNR window and how long the five-year period runs.

• Close company profit extraction: for shareholders with retained profits in a UK close company, the budget changes to post-departure profits must be reviewed before any dividend is declared after the date of departure.

• Five-year planning horizon: those who genuinely intend to remain non-resident beyond five complete tax years may still access substantial planning opportunities, but the five-year line must be maintained without triggering UK residence through excess UK ties under the SRT.

How ASWATAX Can Help

At ASWATAX, we regularly advise entrepreneurs, business owners, and high-net-worth individuals on international residence planning, the structuring of pre-departure asset disposals, UK investment portfolio reviews for non-residents, and the tax-efficient extraction of profits from owner-managed businesses.

Whether you are considering a move abroad, have already left the UK, or are planning to return, the rules in this area require careful and detailed analysis specific to your circumstances.

If any of the issues discussed in this blog are relevant to your situation, we would strongly encourage you to seek specialist advice before taking any action. The consequences of getting this wrong; whether through a mistimed disposal or an unplanned distribution, can be substantial and in many cases entirely avoidable with proper advance planning.