Moving Abroad Mid-Tax Year: Pensions, Split-Year Treatment, and Timing

Moving abroad is rarely timed to coincide neatly with 6 April, the start of the UK tax year. Most people depart in summer when school years end, when job moves take effect, or simply when the logistics allow. The result is that the year of departure is almost always a split year — part UK-resident, part overseas-resident — with different tax rules applying to each part.

For pension savers, the split year creates a number of decisions and compliance obligations that are easy to get wrong. Understanding the framework before you depart — and taking pension decisions in the right order — avoids tax charges and complications that can take years to resolve.

What Is Split-Year Treatment?

The UK's Statutory Residence Test (SRT), which has applied since April 2013, determines UK tax residency in any given year. The SRT contains special provisions for the year of departure (and the year of arrival). If you meet the conditions for split-year treatment, the tax year is formally divided into:

• A UK-resident period (from 6 April to your departure date)
• An overseas-resident period (from your departure date to 5 April)

Income and gains arising in the UK-resident period are subject to UK tax as normal. Income and gains in the overseas period are subject to different rules — potentially no UK tax, or tax only under the relevant double taxation treaty.

Split-year treatment is not entirely automatic — it applies where the relevant SRT conditions are met (broadly, where you have left the UK to live or work abroad and the conditions for ceasing UK residence are satisfied in the year of departure). A tax adviser should confirm your split-year status in the year of departure.

Pension Income in a Split Year

Income Received in the UK-Resident Period

Pension income received from a UK SIPP, defined benefit scheme, or personal pension during the UK-resident part of the split year is fully taxable in the UK at normal income tax rates. Your personal allowance applies to this period. PAYE operates as normal.

If you begin drawing pension income in February, say, and leave the UK in June, four months of pension income falls within the UK-resident period and is taxed in full.

Income Received in the Overseas-Resident Period

The tax treatment of pension income received after your departure date — in the overseas-resident part of the split year — depends on the double taxation treaty between the UK and your destination country.

For many major destinations, the relevant DTT will govern which country has taxing rights over UK pension income for a non-UK resident. In some treaties, taxing rights shift entirely to the country of residence — meaning the overseas period's pension income is taxable only there, not in the UK. In others, the UK retains taxing rights regardless of residence. And some treaties distinguish between state pension (typically UK-taxable) and private pension income (which may be exclusively overseas-taxable).

This means that taking a large pension lump sum or a large drawdown withdrawal immediately before departure (in the UK-resident period) may result in higher UK tax than taking the same amount after departure (in the overseas period), depending on the DTT. However, this is not always the case — the overseas country's tax rate on pension income may be equal to or higher than the UK rate.

Getting this analysis right requires knowing the specific DTT, the nature of the pension income, and the tax rates in the destination country.

Avoiding Unintended Large Withdrawals at Departure

A common mistake is making a large pension withdrawal in the year of departure — perhaps to fund the move, purchase property abroad, or create a cash buffer — without considering the tax consequences.

If the withdrawal falls within the UK-resident period, it is fully taxable as UK income, potentially pushing the individual into higher rate bands for that portion of the year. If it falls in the overseas period, the treatment depends on the DTT.

The practical advice is: do not make significant pension withdrawals in the year of departure without first taking specialist advice. The decision to draw pension income is among the most consequential you can make in the year you leave the UK.

Pension Contributions in a Split Year

UK-Resident Period

Normal pension contribution rules apply during the UK-resident period. If you have relevant UK earnings in this period, you can contribute up to 100% of those earnings (or up to the annual allowance, whichever is lower) and receive tax relief.

Overseas-Resident Period

Once you are in the overseas-resident period of the split year, you are broadly non-UK resident for pension purposes. The general rules for non-residents apply:

• You can contribute up to £2,880 net (grossed to £3,600) regardless of earnings
• Contributions above this require relevant UK earnings subject to UK income tax
• If you have no UK earnings in the overseas period, the £3,600 gross minimum is the effective ceiling

For those who still have UK employment income in the overseas period (for example, working for a UK employer on a posting abroad that continues to generate UK-taxable income), the position is more complex — specialist advice is required.

National Insurance and the Year of Departure

Does the Year of Departure Count?

A qualifying year for state pension purposes requires approximately 52 weeks of NI contributions, credits, or a combination. If you leave the UK mid-year, the question is whether sufficient weeks of NI have been accumulated for the year to be "qualifying".

HMRC assesses the full tax year — if, by 5 April at the end of the split year, you have sufficient weeks of NI contributions or credits (from the UK-resident period and any applicable credits), the year will be a full qualifying year for state pension purposes.

Example: If you leave in June having worked full-time in the UK from April, you will have approximately 10 to 11 weeks of NI contributions. This is unlikely to be enough on its own for a qualifying year. However, some NI credits (for example, child benefit credits) may continue for part of the year even after departure.

Check your NI record in the following tax year to confirm whether the year of departure was qualifying. If it was not, consider whether a voluntary NI contribution can fill the gap (within the standard six-year window for gap-filling).

Timing Strategies: When to Leave

While departure timing should principally reflect genuine circumstances — work, family, property arrangements — it is worth being aware of the tax implications of the timing:

Departing on 5 April (or close to it) is the cleanest outcome. You complete a full UK tax year, your personal allowance is used in full, NI qualifying year is confirmed, and the split-year complexity is avoided.

Departing in late April or early May is among the most complex outcomes. Almost the entire tax year is in the non-resident period. Your personal allowance may be partially wasted (only a few weeks of UK-resident income to use it against), and you may face an NI gap for the previous year depending on when you arrived.

Departing in October to January is typically the most common split-year scenario. You have six months or more of UK-resident income (enough to potentially use the personal allowance fully), a cleaner half-and-half split for pension decisions, and a clear break before the next tax year begins.

If your circumstances allow any flexibility on departure timing, taking a few weeks to consider the tax position — particularly around any planned pension lump sum — can make a meaningful difference.

UK Tax Return in the Year of Departure

In the year of departure, you will almost certainly need to file a UK self-assessment tax return. This is because:

• Split-year treatment must be claimed on the tax return
• Any pension income drawn in the year needs to be declared
• Any employment income, rental income, or other UK-source income must be reported

Ensure you retain records of your departure date, evidence of establishing residence abroad, and all income and pension transactions in the year of departure. These will be required to complete the return.

The deadline for filing the self-assessment return is 31 January following the end of the relevant tax year.

How Global Investments Can Help

Global Investments advises British nationals at every stage of their relocation — including the critical year-of-departure planning that shapes their tax position for years to come. We can model the pension income and contribution strategy for the split year, assess the double taxation treaty position for your destination country, and coordinate with your UK tax adviser on the split-year self-assessment return.

Leaving the UK with a well-structured pension plan — rather than discovering problems retrospectively — is one of the most valuable investments of time and advice available to a departing British national.

Tax rules can change. This guide reflects the position as at 2026. The value of tax relief depends on individual circumstances. Seek regulated financial advice before making pension decisions in the year of departure.