Is a U.K. Pension Lump Sum Taxable in the United States?
The U.K. allows you to withdraw 25% of your pension pot tax-free under U.K. rules, but the IRS does not recognize this exemption. For U.S. tax purposes, the entire lump sum distribution from a U.K. pension is generally taxable as ordinary income in the year you receive it (IRS: Taxation of Foreign Pensions).
How the U.S. and U.K. treat the same withdrawal:
| Treatment | U.K. Rules | U.S. Rules |
| First 25% of pension pot | Tax-free (Pension Commencement Lump Sum) | Fully taxable as ordinary income |
| Remaining 75% | Taxed as income | Taxed as ordinary income |
| Employer contributions | Tax-deferred | May have been currently taxable |
| Investment growth | Tax-deferred | May have been currently taxable |
Why the mismatch hurts:
- U.K. pension is not a “qualified plan” under IRC Section 401(a), so U.S. tax deferral is not automatic
- Treaty Article 17 of the U.S.-U.K. treaty assigns pension taxing rights to the residence country, but the saving clause preserves U.S. taxing rights for citizens
- Employer contributions may have been taxable to the U.S. in the year contributed if the plan was not treaty-eligible for deferral
- Basis recovery: if you already paid U.S. tax on contributions, those amounts reduce the taxable portion of the distribution
Reducing the U.S. tax hit:
- Claim FTC on Form 1116 for any U.K. tax paid on the 75% taxable portion
- File Form 8833 to disclose the treaty position
- Spread withdrawals over multiple years to stay in lower U.S. tax brackets if the plan allows flexi-access drawdown
- Track basis carefully using records of contributions already taxed by the U.S.
For more on foreign pensions, see Foreign Pensions and U.S. Taxation.
Last updated on April 29, 2026
