A pension, twenty shares and a gilt ladder walk into a portfolio

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

There are four routes an American in Britain can invest through without creating a tax problem. A workplace pension, individual company shares, a dual qualified fund, and plain cash on deposit.

None of them is exotic and none of them is expensive. They are simply not what a British adviser reaches for first.

This article ranks those four, adds gilts, property and employer share schemes to the list, and prices the running cost of each. Together they are the ISA alternatives that survive an American passport.

Key takeaways

• A workplace pension carries treaty protection on its growth.
• Individual company shares escape the pooled fund regime entirely.
• A dual qualified fund satisfies both tax systems at once.
• Gilts suit the cautious end and avoid British capital gains tax.
• Employer share schemes and property both sit outside the fund rules.
• Pooled vehicles, including investment trusts, are the thing to avoid.
• Running costs usually fall rather than rise on these ISA alternatives.

Which ISA alternatives actually work?

Four routes, in order of usefulness. A workplace or personal pension comes first because the treaty protects its growth. Individual company shares come second, dual qualified funds third where your platform allows them, and plain cash deposits fourth for anything short term.

The right mix of ISA alternatives depends on your horizon rather than your nationality.

Most of our clients end up holding two or three of the four.

Why is a pension the best wrapper?

Because the treaty protects growth inside a recognised British scheme from American tax until you draw it. No other wrapper on the list of ISA alternatives gets that. No other British wrapper gets that treatment. Add employer contributions and relief at your marginal rate and nothing else comes close.

Our guide to UK pensions and US retirement reporting covers the mechanics.

The constraint is access, since the money stays locked until pension age.

How do individual shares help?

They avoid the fund rules completely, because the punitive regime targets pooled vehicles rather than operating companies. A portfolio of twenty shares produces dividends and gains that both systems tax in an ordinary way. The trade off is concentration risk.

Some clients build a spread of large listed companies for exactly this reason.

Others accept the narrower diversification as the price of simplicity.

What is a dual qualified fund?

A fund that America treats as a domestic vehicle while Britain grants it reporting fund status. That combination removes the punitive American regime and keeps British gains in the capital gains net. A handful of large American funds carry both characteristics.

Our guide to UK reporting fund status explains the British half, and HMRC guidance publishes the list of funds that currently hold the status.

Check the specific share class, because status attaches at that level.

Can you actually buy those funds in Britain?

That is the practical obstacle. British retail rules restrict access to American domiciled funds for most private investors, because the required disclosure documents do not exist in the right format. Some platforms accept Americans and some classify experienced investors differently.

So the answer depends on the platform more than on the fund.

Ask before opening an account rather than afterwards.

What about gilts?

British government bonds carry no capital gains tax, which made low coupon issues popular with higher rate taxpayers. America taxes both the interest and the gain in the ordinary way. The British advantage survives, though it is smaller for you than for a neighbour.

They still suit the cautious part of a portfolio.

Hold them directly rather than through a bond fund.

Do workplace share schemes count?

They sit outside this discussion, because employer shares are shares rather than funds. That makes them clean from the fund rules, though the timing of the American charge differs from the British one. The employer discount is usually worth taking anyway.

Our guide to share incentive plans and US tax covers the timing.

Treat the proceeds as ordinary shares once they leave the scheme.

Is property a sensible route?

Plenty of British investors think so, and it avoids the fund rules completely. The complications sit elsewhere: both countries tax the rent, the mortgage can create a currency gain, and the eventual sale needs two separate computations.

Our guide to UK rental income and US tax sets out the running position.

It is a real option rather than an easy one.

A worked example

Take an illustrative example. An American in Leeds has £20,000 to invest in 2025 and a workplace pension with a six per cent employer match.

Putting it in a stocks and shares ISA buys British funds that produce American reporting every year and a heavy charge on sale.

Putting it through the pension instead captures the match, grows without an American charge and needs no annual fund reporting.

The remainder goes into individual shares in a general account, the simplest of the ISA alternatives. Neither route involves an ISA at all.

The main routes compared

Are investment trusts an option?

Rarely, despite their popularity in Britain. They are pooled vehicles, so the American fund rules generally apply to them just as they do to open ended funds. Their closed ended structure makes no difference to that analysis.

In our practice this surprises more clients than anything else.

British advisers recommend them constantly and rarely know the American position.

What about premium bonds and savings products?

Premium bond prizes are tax free in Britain and taxable in America, which removes much of their appeal against other ISA alternatives. Ordinary savings accounts behave predictably in both systems. Neither carries the fund problem, so neither needs annual reporting beyond the usual account disclosures.

Our guide to premium bonds and US tax covers the prize treatment.

For an emergency fund, a plain savings account remains hard to beat.

Do ISA alternatives cost more to run?

Usually less, once you count the preparation fees an ISA full of British funds generates. Each fund needs its own annual reporting form, and a portfolio of eight funds produces eight of them. Shares and pensions need none of that.

The saving on fees often exceeds the British tax the ISA would have saved.

That calculation turns the usual advice on its head.

What if you plan to leave Britain?

That shortens the horizon and changes the ranking. A pension locked until later life suits somebody staying, while shares in a general account travel with you easily. An ISA stops accepting contributions once you leave and becomes awkward.

Our guide to moving back to the US covers the wider checklist.

Plan the exit before building a portfolio around British wrappers.

What is wrong with an ISA for an American?

Two things, and the second is worse. America ignores the wrapper, so the income and gains inside remain fully taxable there. More seriously, most funds held inside one count as passive foreign investment companies and attract a regime designed to discourage them.

That regime taxes gains at the highest rate with an interest charge on top.

Our guide to the lifetime ISA and US tax shows how the arithmetic works out.

Is a cash ISA worth keeping?

It does no harm, which is the strongest thing to say for it. Interest inside escapes British tax and remains taxable in America, usually at a small cost after the foreign tax credit. There is no fund problem because there is no fund.

According to GOV.UK guidance on individual savings accounts, interest inside the cash version escapes British tax, and the personal savings allowance already shelters modest amounts outside it.

So the wrapper only earns its keep at larger balances.

Does the allowance simply go to waste?

Only the stocks and shares half, and only if nobody else in the household can use it. A non-American partner can take the full allowance each year. Where you are single, the cash version still shelters interest without any American complication.

So very little is genuinely wasted in practice.

The loss is the tax free growth on funds, which you were never going to enjoy anyway.

What if you already hold an ISA full of funds?

Deal with it deliberately rather than leaving it to drift. Selling crystallises the charge now, while holding defers a larger one and adds reporting each year. The right answer depends on the size of the gain and how long you intend to stay.

A purging election sometimes cleans up the position.

Our guide to the PFIC purging election sets out when it helps.

Does a British spouse change the plan?

Considerably, because they can hold the wrappers you cannot. A non-American spouse can run the stocks and shares ISA for the household while you hold shares and pensions. That split is legitimate where the money genuinely belongs to them.

Moving money to achieve it raises a gift question above the annual allowance.

Our guide to the marital deduction for a non-citizen spouse covers the limits.

What about children's savings?

Only if the child is not American, which depends on where they were born and your own history. An American child inherits the same fund problem in a junior ISA. A cash version avoids it, and grandparents can often hold investments instead.

Our guide to the junior ISA and US child tax covers the position.

Check the child's status before opening anything.

What records should you keep?

Keep purchase contracts, dividend vouchers and annual statements for everything held outside a pension. American reporting works from cost and date, and British statements routinely omit both. Platforms show a current value and a percentage return rather than what you actually paid.

Record the dollar cost at purchase as well as the sterling one.

Doing it at the time takes minutes and saves hours later.

How to build the portfolio

1. Fill the workplace pension to at least the employer match.
2. Hold an emergency fund in cash, inside or outside a wrapper.
3. Choose individual shares over pooled funds in general accounts.
4. Check any fund for both reporting status and American treatment.
5. Confirm your platform will deal for an American client.
6. Use a non-American spouse's allowances where the money is theirs.
7. Review existing holdings before adding to any ISA alternatives.
8. Record cost and date in both currencies at every purchase.

Mistakes and penalties we see with ISA alternatives

The first is following standard British advice without looking at the ISA alternatives at all. The ISA first rule does not survive American citizenship.

The second is assuming an investment trust escapes the fund rules. It does not.

The third is buying a fund without checking its British reporting status, which converts a gain into income here.

The fourth is ignoring an existing ISA for years. Each year of holding adds reporting and defers a larger charge.

How US UK Tax Accountants helps

We look at a portfolio line by line and tell you which holdings cause American trouble and which are clean. Then we set out the routes that work on both sides, with the running cost of each.

Where an ISA already holds funds, we model selling against holding. Our PFIC reporting service covers the forms while the position unwinds.

If a British adviser has just recommended an ISA, get in touch before you act on it.

Last reviewed 15 October 2026. This article is general information and not personal tax advice, and nothing here is a recommendation to buy or sell any investment.