Self-invested personal pensions for American Expats
Updated on February 11, 2026
Published by
Darshana Dhanani,, an IRS Enrolled Agent with 9 years of expat tax experience, specializes in US tax preparation, tax planning, and tax advice for US citizens and Green Card holders living and working abroad.
Table of Contents
Self-invested personal pensions (SIPPs) for US expats
A self-invested personal pension (SIPP) is a UK retirement account that gives you more control over how your pension money is invested. For Americans living abroad, though, SIPPs come with extra layers of tax complexity that don’t always fit neatly into the IRS framework.
Let’s unpack how they work, who can use them, and where the tax quirks lie.
What is a SIPP and how does it work for US citizens abroad?
A SIPP is a type of defined contribution pension in the UK, meaning your balance depends on what you put in and how your investments perform. You can choose your provider, decide how often you contribute, and invest in assets such as funds, shares, or even commercial property—as long as it’s within HMRC rules.
When you contribute, the UK government usually adds tax relief. For example, a £100 contribution might only cost £80 out of pocket if your provider claims the 20% basic-rate relief for you. Additionally, higher-rate taxpayers can claim extra through HMRC or their Self Assessment return.
For US expats, the basic structure stays the same. But the tax recognition may differ depending on your treaty position and how you report the account back to the IRS.
Can US citizens open or keep a UK SIPP while living outside the UK?
Yes, you can usually keep a SIPP after moving abroad. Opening a new one while already living in the US, however, can be trickier.
Most mainstream UK SIPP providers do not accept new clients from the US due to FATCA and SEC compliance requirements. A few “international SIPP” providers cater to expats but often charge higher fees.
If you already have a SIPP, you can still manage it remotely, view balances online, rebalance investments, or even take withdrawals later. Just make sure your provider knows you’re non-UK resident and will continue supporting US-based clients before you rely on it long-term.
How much can non-residents contribute and still receive UK tax relief?
If you’re no longer earning in the UK, you can still contribute up to £3,600 gross each year.
- £2,880 from you;
- £720 in UK tax relief
This option usually remains open for up to five tax years after you leave, provided you joined the pension before becoming non-resident and have no relevant UK earnings.
The five-year limit applies only to tax relief, so you can still contribute beyond that period, just without any UK tax top-up unless you have UK-taxable income.
Those with ongoing UK-taxable income can contribute up to the annual allowance of £60,000, or 100% of their UK earnings, whichever is lower.
If you’ve accessed any UK pension flexibly (through drawdown or lump sums), the Money Purchase Annual Allowance is cut to £10,000.
Note: There’s no penalty for contributing while abroad. You just might not receive tax relief beyond those limits once you’re fully non-resident.
SIPP and US tax requirements unclear? Get in touch today for answers.
How does the US tax a UK SIPP?
The IRS doesn’t officially recognize or classify UK SIPPs under any single, defined category in US tax law. Depending on the structure, a SIPP might be treated as:
- a foreign grantor trust
- an employer plan
- a foreign retirement account.
Because the IRS doesn’t label it, tax professionals classify SIPPs in various ways, and that choice affects:
- whether your investment growth is tax-deferred or taxable each year,
- whether you file Form 3520/3520-A (foreign trust),
- whether you report funds inside it as PFICs on Form 8621,
- and whether you can claim treaty protection under Article 17 or 18 of the US-UK tax treaty.
For example:
If you have a UK workplace pension, the IRS might accept that it’s an “employer pension” (like a 401k). But a SIPP is self-directed; you opened it yourself, so it doesn’t clearly count as an employer plan.
That’s why the IRS hasn’t given it a simple label or default treatment.
Without treaty protection, the IRS may treat the account as if it’s just another investment wrapper, meaning income and gains are reportable annually. That can undo the deferral you expect under UK rules.
Why do PFIC rules matter for Americans with SIPPs?
Most UK mutual funds and OEICs count as Passive Foreign Investment Companies (PFICs) to the IRS. Owning even one of these funds can trigger complex Form 8621 filings and often punitive US tax rates on gains.
The IRS hasn’t issued a blanket exemption for PFICs held inside UK pensions, so treatment depends on how your account qualifies under the US-UK tax treaty and how you report it.
Many expats prefer holding individual shares, US-listed ETFs, or specific global trackers that report properly to the IRS. You can safely ask your provider whether they support US-compliant investments before funding the account.
When can you take money from a SIPP, and how is it taxed?
You can normally start taking money from your SIPP at age 55. That minimum age will rise to 57 in April 2028. That’s called the “normal minimum pension age.” It’s there to prevent people from tapping into retirement funds too early, unless there’s a serious health reason.
You can take up to 25% tax-free, and the rest is taxed as income in the UK. Tax-free cash is now limited by the new lump-sum allowances that replaced the Lifetime Allowance from 6 April 2024. For most people, the maximum remains £268,275.
If you live in the US when you draw that money, things get more complicated. The US will typically view those withdrawals as taxable ordinary income as well. In many cases, though, you can use foreign tax credits to offset the UK tax you’ve already paid. The US-UK tax treaty helps prevent double taxation by letting one country give credit for tax paid in the other.
How much should you save into a SIPP if you’re living in the US?
If you’ve left the UK permanently, smaller contributions often make more sense, enough to keep your UK pension active but not so much that you trigger extra US paperwork.
Think of your SIPP as one piece of a wider retirement mix that might include US IRAs or employer plans. Tools like the Retirement Living Standards can still guide your target numbers.
The earlier you start, the more time compounding has to work, even if you keep contributions modest while abroad.
Can you transfer other UK pensions into a SIPP if you live overseas?
Yes, but proceed carefully. Transferring from a defined benefit (final salary) plan can result in the loss of valuable guaranteed income. If you’re in the US, note that not all providers accept inbound transfers for US residents because of FATCA reporting.
Before transferring, ask:
- Will the new provider serve US clients?
- What fees apply?
- Will you lose existing benefits, such as protected tax-free cash or early access, by moving?
If you’re consolidating multiple small pots, a SIPP can make management easier. But if you’re chasing investment control, double-check that control doesn’t come at the cost of extra tax exposure.
What happens to a SIPP when the account holder dies?
When you open a SIPP, you’ll fill out an expression of wish form naming who should receive your remaining pension. SIPP funds have typically fallen outside the UK inheritance tax estate. That could change in April 2027, when most unused pension funds and death benefits could be included in the estate for IHT purposes.
That shift makes estate planning even more relevant for US expats, since the US also imposes estate tax on worldwide assets. So coordinating both systems early can save your family a lot of confusion later.
Should Americans abroad get professional help with SIPPs?
If you hold UK pensions while living in the US, you’re juggling two tax codes that rarely agree on definitions. That’s usually not a DIY exercise.
Look for advisers who understand both IRS and HMRC treatment. Ideally, those familiar with the treaty and foreign trust reporting. Even a short consultation can help you avoid costly missteps like unfiled PFIC forms or incorrect treaty elections.
FAQs
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Can I move my SIPP into a US retirement account like an IRA?
Not directly. There’s no IRS-approved rollover route between UK pensions and US IRAs. You’d have to withdraw the funds from your SIPP and then contribute to a US plan separately, but that would trigger UK income tax and possibly US tax, too.
In most cases, it’s not efficient. Keeping your SIPP in the UK and managing it from abroad is usually the better move.
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What happens if I stop contributing to my SIPP after leaving the UK?
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Is it possible to lose money in a SIPP?
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Will taking money from my SIPP affect my US Social Security or Medicare?
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Can I contribute to both a US retirement plan and a UK SIPP?
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