The college fund that stops being tax free at Heathrow

Figures relate to tax year 2025-26 (UK) · 2025 (US)

A college savings account is one of the few genuinely simple things in American tax. Money goes in, grows untouched, comes out free for education.

Britain has never heard of it. To HMRC it is an investment account in somebody's name, taxed like any other.

So the clean American answer and the messy British one sit on top of the same pot of money.

Key takeaways

• 529 plans are tax free in America and unrecognised in Britain.
• HMRC taxes the growth as it arises, not when you draw it.
• The treaty has no article that rescues the wrapper.
• Who HMRC treats as the owner depends on how the plan is set up.
• A plan can look like a settlement, which brings its own rules.
• Qualified withdrawals can still be taxable to a UK resident.
• Junior ISAs carry their own American problem in reverse.
• The best answer usually depends on where the child will study.

What are 529 plans?

State-sponsored savings accounts for education costs. According to IRS guidance on education savings, money grows free of federal tax and comes out free of tax when spent on qualifying costs. Contributions get no federal deduction, though many states give one of their own.

They are simple, cheap and very widely used in America.

Almost every American parent has heard of one.

Does HMRC recognise 529 plans?

No. There is no British equivalent and no treaty article covering them, so the wrapper simply falls away at the border. HMRC looks straight through to the underlying investments and taxes whoever it regards as owning them in the ordinary way.

Our guide to the US-UK tax treaty covers what the treaty does protect.

Pensions got an article. Education savings did not.

What do 529 plans cost in UK tax?

The income and gains inside the account, as they arise. Dividends from the underlying funds are dividend income, and a fund switch inside the plan is a disposal. None of that is visible on an American statement, which reports nothing until you withdraw.

Our guide to UK dividends and US tax covers dividend treatment.

So the British tax arrives years before any American one would.

Who owns 529 plans for HMRC?

Usually the account owner, who is normally the parent rather than the child. That means the growth lands on the parent's return at the parent's rates. Some plan structures point elsewhere, so the paperwork matters more than the label on the website.

Read the plan documents rather than assuming.

Custodial arrangements can give a different answer.

Could 529 plans count as a settlement?

It can, and that is the uncomfortable possibility. Where money is put aside for somebody else under terms that restrict it, British rules may treat the arrangement as a settlement with its own reporting and its own anti-avoidance provisions. The analysis turns on the particular plan.

Our guide to the Trust Registration Service covers registration.

Take advice on this rather than guessing at it.

Two countries, one college fund

Are 529 plans taxed again on withdrawal?

Not usually, because Britain already taxed the growth on the way through. Taxing the withdrawal as well would charge the same money twice. The practical problem is the opposite: British tax falls due in years when no cash has come out to pay it.

Budget for a tax bill on money you cannot touch.

That mismatch is the real difficulty with the whole arrangement.

Do 529 plans give a foreign tax credit?

There is usually nothing to credit, which is the awkward part. America charges no tax on the growth, so there is no American tax for Britain to relieve. You end up paying British tax in full on income that America deliberately exempted.

Our guide to Form 1116 income baskets covers the credit mechanics.

A relief against nothing is worth nothing.

Do the funds inside 529 plans cause trouble?

Not for an American, because the underlying funds are American ones. That is a genuine advantage over the British alternatives, which are full of pooled investments the IRS treats harshly. Keeping the money where it is avoids that particular trap.

Our guide to the ISA and PFIC problem covers the reverse case.

American funds are the easy half of this puzzle.

What about a Junior ISA instead?

It is tax free for the child in Britain and invisible to that relief in America. According to GOV.UK guidance on junior accounts, the wrapper shelters the growth from British tax entirely, but the IRS ignores the wrapper and may treat the funds inside unkindly.

Our guide to Junior ISAs and US child tax covers that side.

Each country shelters what the other taxes, which is the whole story.

A worked example

Take an illustrative family. An American couple move to Edinburgh holding a college pot opened eight years earlier.

It throws off dividends and the manager rebalances it twice a year.

America sees none of that and charges nothing at all.

Britain sees dividend income and several disposals, and wants tax on both from a pot nobody can draw on for a decade.

Should you close 529 plans when you move?

Rarely, and certainly not in a hurry. A non-qualified withdrawal brings American tax on the growth plus an additional charge, which is a heavy price for tidiness. Holding the account and reporting it properly is usually cheaper than unwinding it.

Work out the cost of exit before deciding.

Moving abroad is not itself a reason to close one.

Can you keep paying into 529 plans?

The plan will usually accept money, and the question is whether it is sensible. Every pound you add generates British tax on its growth with no American relief to offset. For a family settled in Britain, new money often works harder somewhere else.

Stop adding before you consider closing.

Existing balances and new contributions are different decisions.

What if the child studies in Britain?

Many British universities are on the eligible list, so withdrawals for them can still qualify on the American side. That is worth checking before you assume the plan is useless here. The British tax on the growth happened either way.

Check the institution's eligibility code before drawing.

Eligibility is specific to the institution, not to the country.

What if the child never goes?

You can change the beneficiary to another family member, which is the usual answer. Failing that a non-qualified withdrawal brings tax and an extra charge on the growth alone. Recent American rules also allow a limited transfer into a retirement account.

Our guide to US retirement accounts in the UK covers the receiving side.

Britain would look at such a transfer on its own terms.

Do 529 plans go on your FBAR?

No, because it is an American account rather than a foreign one. The reporting problem runs the other way: it is your British accounts that need listing. A college pot in Ohio is simply domestic as far as those rules go.

Our guide to FBAR signature authority covers what does count.

Nothing about the plan goes on an American information return.

Does HMRC need to hear about it?

Yes, through your return. Foreign income and gains belong on the foreign pages whether or not any money has reached your hands. Leaving it off because the American statement shows nothing is the mistake we see most often here.

Our guide to registering for Self Assessment covers the filing.

The American statement is not a British tax document.

What records will you need?

Fund level detail, which the plan does not volunteer. You need dividends by date, every internal switch, and the value of each holding, because the British computation needs all three. Ask the provider for transaction level statements each year.

Our guide to exchange rates on a US return covers converting the figures.

Annual summaries alone are not enough to compute a British charge.

Is there a simpler way to hold it?

Some families move the investments into a single fund that rarely trades, which cuts the number of disposals to compute. That does not solve the dividend side, but it makes the annual work far lighter. It is a practical fix rather than a tax one.

Fewer moving parts means fewer British calculations.

Ask the provider which options trade least.

What should a cross-border family use?

There is no wrapper that works in both systems, so the honest answer is to pick the country the child will probably study in and accept friction in the other. Plain savings in the parent's name are sometimes simplest of all.

Our guide to tax-free childcare for US citizens covers another mismatch.

In our practice simplicity usually beats the last point of relief.

Does a grandparent's plan help?

It can, if the grandparent is not British resident. A plan owned by somebody outside the British system keeps the annual growth outside it too, and the child only meets British tax if money is paid to them. The structure has to be genuine.

Our guide to Form 3520 and foreign gifts covers gifts across borders.

Do not treat a relative as a parking space for your own money.

Do 529 plans recover if you move back?

It restores the simple American position. Once you stop being British resident, HMRC stops taxing the growth and the wrapper does what it was designed to do again. People who expect to return often leave the plan untouched for exactly that reason.

Our guide to moving back to the US covers the return.

A few British years do not spoil the account permanently.

Do 529 plans affect child benefit?

They can, through the back door. The high income charge looks at adjusted net income, and British tax on the plan's growth lands in that figure. A family sitting near the threshold can be tipped over it by investment income nobody has actually received.

Our guide to the high income child benefit charge covers the threshold.

Model the two together rather than one at a time.

Does it affect UK student finance?

Student finance in Britain is assessed on household income rather than on savings, so the balance itself is ignored. The income the account throws off does count, which is the same point again. A large pot is invisible and its dividends are not.

Savings are not means tested for English undergraduate support.

Rules differ across the four nations, so check the right one.

What if both parents are American?

Then only one of you is likely to be the account owner, and the British tax follows that person alone. Splitting a single plan between two parents is not possible, though opening a second plan for the same child is. That can spread the income across two sets of allowances.

Our guide to joint accounts for US-UK couples covers shared ownership.

Two smaller plans are sometimes better than one large one.

Do 529 plans count for inheritance tax?

The balance generally sits in the owner's estate, which is the parent rather than the child. American rules treat a contribution as a completed gift while British rules look at who still controls the money. Those two views do not always agree.

Our guide to UK inheritance tax and the US system covers the estate position.

A plan you can take back is still yours in substance.

Can you move a plan between states?

Yes, and a rollover once a year is generally allowed without an American charge. Britain would look at whether the underlying investments were sold to do it, which usually they are. So a tidying exercise in America can create a taxable disposal here.

Our guide to state tax for expats covers the state angle.

Time any rollover with the British computation in mind.

What about the state relief you already claimed?

Most states give a deduction for contributions and claw it back if you later move the money out of their plan. Leaving the state does not usually trigger that, but a rollover elsewhere can. Check the rules of the state that gave you the relief.

Clawback is a state matter and varies widely.

It has nothing to do with your British position.

Does the plan provider know you moved?

Only if you tell them, and many families do not. Some providers restrict accounts held by people with a foreign address, so a change of address can prompt awkward letters. Others carry on without comment for years, which is the commoner outcome.

Ask the provider before you update the address, not after.

Keep a US address only if it is genuinely yours to use.

How to handle 529 plans from Britain

1. Find out who the plan documents treat as the owner.
2. Ask the provider for transaction level statements each year.
3. Compute the British income and gains as they arise.
4. Report them on the foreign pages even with no withdrawal.
5. Take advice on whether the arrangement is a settlement.
6. Stop new contributions before considering closure.
7. Check whether the intended university is on the eligible list.
8. Leave the account alone if you expect to move back.

Mistakes and penalties we see with 529 plans

The first is reporting nothing to HMRC because the American statement showed nothing.

The second is closing the account on arrival and paying American tax plus a charge for no good reason.

The third is carrying on with monthly contributions that now cost more in British tax than they save.

The fourth is missing the settlement question entirely, which is the one with real reporting behind it.

How US UK Tax Accountants helps

We start with the plan documents, because who owns the account decides whose return the British tax lands on, and families are often wrong about it.

Then we build the annual computation the provider will never give you. Our cross-border service covers both returns.

If you moved here with a college fund still running, get in touch.

Last reviewed 27 October 2026. This article is general information and not personal tax advice, and plan terms differ between states.