Social Security and Retirement for UK Expats in the US
Updated August 2026
Planning for retirement as a UK expat in the US means navigating two pension systems, a totalization agreement, and rules on both sides that don’t always line up neatly. As an overseas moving company that regularly coordinates UK-to-US relocations, we’re not financial advisors, but we’ve seen where clients get caught out on timing, so this covers the essentials and where to get specialist help.
Understanding US Social Security
To qualify for US Social Security benefits, you generally need 40 work credits, roughly 10 years of work, earning up to four credits per year. If you’ve previously worked in the UK, the US-UK totalization agreement lets you combine work credits from both countries to qualify, so time spent working in the UK isn’t wasted for US eligibility purposes. Contributions are mandatory and typically deducted from your paycheck; self-employed individuals pay both the employee and employer portions through self-employment tax.
Applying for Benefits
You can apply online through the Social Security Administration’s website, by phone, or in person. Apply 3 to 4 months before you want benefits to start; that lead time covers processing and gives room to resolve any documentation issues. You’ll need proof of age, your Social Security number, proof of US citizenship or lawful status if not US-born, and recent W-2 forms or self-employment tax returns.
Retirement Accounts and Transferring UK Pensions
US retirement accounts (401(k)s and IRAs, including Roth IRAs) each carry different tax treatment: 401(k) contributions are typically pre-tax, while Roth IRAs use after-tax dollars in exchange for tax-free withdrawals later.
Transferring a UK pension to the US is more complicated than it used to be. Qualified Recognised Overseas Pension Schemes (QROPS) are the standard mechanism, but the rules changed materially after the October 2024 UK Budget: HMRC removed the exemption that previously let expats transfer to an EEA-based QROPS regardless of where they actually lived. Now, to avoid a 25% Overseas Transfer Charge, you generally need to be resident in the same country as the receiving scheme, and QROPS options based in the US carry their own added complexity under US tax law. This is genuinely specialist territory; a cross-border pension adviser who works both UK and US rules is worth the cost before you transfer anything.
Healthcare in Retirement
Medicare is US government health insurance for people 65 and older, split into Part A (hospital insurance), Part B (medical insurance for outpatient care), Part C (Medicare Advantage, a private-plan alternative bundling A and B), and Part D (prescription drug coverage). Many retirees add Medigap supplemental insurance to cover the copays, coinsurance, and deductibles Medicare doesn’t. If you’re coming from the NHS, expect this to be a bigger planning item than it might seem at first, since unlike the NHS, none of this is automatic or free at the point of use.
Eligibility Has Changed, and It Matters More for Non-Citizens Now
This is worth reading carefully if you’re not planning to become a US citizen. Under a 2025 federal law, Medicare eligibility for lawfully present non-citizens is now limited to green card holders (lawful permanent residents), certain Cuban and Haitian entrants, and people residing under a Compact of Free Association. Other visa categories no longer qualify at all, regardless of age. If you’re a UK citizen relocating on a work visa without a green card, this is something to plan around well before retirement age.
Even as a green card holder, if you or a spouse haven’t accumulated 40 work credits (10 years) of Medicare-taxed work in the US, you’ll generally need five continuous years of lawful permanent residency before you can enroll and pay premiums for Part A and B. With 40 credits, you qualify for premium-free Part A at 65 like a US citizen. This timing is worth mapping out early, since the residency clock and the work-credit count don’t always align the way people expect.
Tax Considerations
Withdrawals from traditional 401(k)s and IRAs are taxed as ordinary income; Roth IRA withdrawals are generally tax-free. Required minimum distributions (RMDs) now begin at age 73 for most people born 1951–1959, rising to 75 for those born 1960 or later. This was raised from the previous age 72 under the SECURE 2.0 Act, so double-check this if you’re working from older advice. Roth 401(k) and Roth 403(b) accounts have been exempt from RMDs since 2024. As a UK expat, you’ll also want to understand how US and UK tax treaties interact with your specific accounts; our guide to US taxation for UK expats covers the broader picture.
Frequently Asked Questions
Can I still receive my UK State Pension while living in the US?
Yes, the UK State Pension can be paid to you while living in the US, and the US is one of the countries with which the UK has a reciprocal agreement covering annual increases. So unlike expats who move to Canada, Australia, or New Zealand (where the pension gets frozen at whatever level it was when they left), a UK State Pension paid to someone living in the US continues to receive the normal annual “triple lock” uprating. This is a genuine advantage of the US as a retirement destination compared to some other popular expat countries.
Is my US Social Security taxed if I’m a UK citizen?
It depends on your residency and citizenship status and how the US-UK tax treaty applies to your situation. This varies enough by individual circumstance that it’s not something to assume either way without checking with a tax professional familiar with both countries’ rules.
Getting Started
Retirement and pension planning across two countries is specialist work, and a cross-border financial advisor is worth involving early, ideally before you finalize a move date, since some decisions (like QROPS timing) are easier to get right before you relocate than after. When you’re ready to plan the shipping side of your move, request a free quote and your coordinator can help align the moving timeline with everything else you’re juggling.
