UK Pension Options for Expats in the USA (2026)

Many people who move from the United Kingdom to the United States assume their UK pension can be transferred into a US retirement account, in the same way it might move to a scheme in some other countries. In practice that route is effectively closed. The reasons sit at the intersection of HMRC transfer rules, US Internal Revenue Service (IRS) treatment of foreign schemes, and the UK-US double tax treaty.

This guide sets out why a UK pension transfer to the USA is generally not possible, what retaining the UK pension involves, how the treaty allocates taxing rights over pension income, and the well-known uncertainty around the UK 25 per cent tax-free lump sum once you are a US resident.

• No US retirement scheme currently holds Recognised Overseas Pension Scheme status, so a UK transfer is generally not possible.
• A transfer to a non-qualifying overseas scheme can be treated by HMRC as an unauthorised payment, with a UK tax charge attached.
• Most expats retain the UK pension and draw it from the US instead of transferring it.
• The UK-US treaty generally gives the country of residence primary taxing rights over periodic pension income.
• The IRS often treats the UK 25 per cent tax-free lump sum as taxable; treaty relief is contested.
• Pension and tax positions depend on US residence and require advice from an authorised adviser.

Why a transfer to the USA is generally not possible

A transfer of UK pension benefits to an overseas scheme is only permitted, without an immediate UK tax charge, where the receiving scheme is a Recognised Overseas Pension Scheme (ROPS, and previously a Qualifying Recognised Overseas Pension Scheme or QROPS) on the list maintained by HMRC. The difficulty for the United States is straightforward. No US retirement arrangement currently holds ROPS status, so there is no compliant receiving scheme to transfer into.

The structural reason is that US plans do not meet HMRC conditions. A 401(k) accepts employer and employee contributions tied to US employment and can allow access before the UK normal minimum pension age; an Individual Retirement Account (IRA) has its own contribution limits and source rules. Neither is built to receive a transferred UK pension pot, and neither satisfies UK preservation and reporting requirements. Attempting a transfer to a non-qualifying scheme can be treated by HMRC as an unauthorised payment, which carries a UK tax charge. The practical outcome is that someone retiring in the United States cannot move a UK pension into a US retirement account.

Retaining the UK pension instead

Because the transfer route is closed, the common position is to leave the pension in the UK and draw an income or lump sums from it while resident in the United States. A UK personal pension, SIPP or workplace scheme continues to operate under UK rules. The benefits stay invested in the UK, and withdrawals are made under UK pension freedoms, subject to how the UK and the US each treat those payments.

Retaining the scheme avoids the transfer problem but introduces cross-border reporting. A US resident is taxed on worldwide income, so UK pension withdrawals must be reported to the IRS, and foreign financial account reporting obligations may also apply to the underlying arrangement. The interaction with the treaty determines where tax is actually due.

How the UK-US treaty taxes pension income

Article 17 of the UK-US double tax treaty deals with pensions. As a general rule, periodic pension payments are taxable only in the country where the recipient is resident. For someone living in the United States and drawing a UK pension, that points to US taxation of the regular income, with the UK generally not taxing the same payments where the treaty applies.

An important complication is the treaty saving clause, which lets the United States tax its citizens and residents broadly as if parts of the treaty did not apply. Certain pension protections are carved out of the saving clause and survive it; others do not. The result is that periodic income is usually straightforward, but lump sums are where disputes arise.

The 25 per cent tax-free lump sum problem

Under UK rules, a member can normally take a pension commencement lump sum (PCLS) of up to 25 per cent of the pension value free of UK tax, subject to the UK lump sum allowance. The difficulty is that this is a UK tax concept. The IRS does not have an equivalent automatic exemption for foreign pension lump sums, and a common conservative position among US cross-border specialists is that the PCLS is fully taxable as ordinary income in the United States.

There is genuine professional disagreement. Some advisers argue that the reciprocal pension exemption in Article 17, paragraph 1(b) of the treaty preserves the UK exemption, so the lump sum should be tax-free in both countries, and they file Form 8833 to disclose the treaty position. Others read the saving clause as allowing the US to tax it. The IRS has not given a definitive public ruling, and the point has not been settled in court. Anyone planning to take a PCLS while US resident is taking a position on an unresolved question, which is precisely why advice matters.

This article is for general information only and does not constitute financial, tax or regulatory advice. Kaeltripton.com is not authorised or regulated by the FCA. Pension and tax rules differ by country of residence and change over time. Verify any figure with official sources such as GOV.UK, HMRC or the FCA, and take advice from a suitably authorised adviser in your country of residence before acting.

FAQ

Can I transfer my UK pension to a US 401(k) or IRA?

Generally no. No US retirement scheme currently holds ROPS status, and US plan and IRS rules do not allow them to receive an inbound UK pension transfer, so the transfer route is effectively closed.

What happens if I just leave my UK pension in the UK?

Most US residents retain the UK scheme and draw income or lump sums from it. The pension stays under UK rules, but withdrawals must be reported to the IRS because the US taxes worldwide income, and the treaty governs where tax is finally due.

Who taxes my UK pension income once I live in the US?

Under Article 17 of the UK-US treaty, periodic pension income is generally taxable in the country of residence, which is the US for a US resident. The UK usually does not tax the same payments where the treaty applies.

Is the UK 25 per cent tax-free lump sum tax-free in the US?

Not reliably. The IRS commonly treats the lump sum as taxable ordinary income. Some advisers claim treaty relief under Article 17 and file Form 8833, but the point is contested and has not been settled by the IRS or the courts.

Should I take my tax-free lump sum before moving to the US?

The timing and treatment depend on residence at the point of payment and on an unresolved treaty question. Because positions differ, this is a matter for a suitably authorised cross-border adviser rather than a general rule.