UK dividends and interest on your US return: why small British income creates real US tax

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

UK dividends and savings interest look too small to matter. A few hundred pounds from shares, a little interest from a savings account, and Britain often charges nothing at all. That is precisely what creates a US tax bill.

Where no UK tax is paid, there is no foreign tax credit to claim. So this guide covers how each type of income is taxed on both sides, when British dividends qualify for lower US rates, and why the credit often fails to help.

Key takeaways

• The UK dividend allowance is £500 for 2025-26, and the savings allowance up to £1,000.
• Income covered by those allowances bears no UK tax, so no credit is available.
• Most UK dividends qualify for the lower US rates under the treaty.
• Dividends and interest fall in the passive basket for credit purposes.
• Excess credits from your salary cannot be used against that passive income.

What is the UK treatment?

Britain taxes dividends and interest separately from salary, with their own allowances and rates. According to the GOV.UK guidance on dividend tax (opens in a new tab), the allowance covers the first £500 of dividends for 2025-26, with rates above that running from 8.75% to 39.35%.

Savings interest works similarly. Basic-rate taxpayers get £1,000 of interest free of tax, higher-rate taxpayers £500, and additional-rate taxpayers nothing. UK banks pay interest gross, with no tax deducted at source.

Those allowances are generous for small savers. They are also the source of the problem for anyone filing an American return.

The relief Britain gives you is the relief America takes back. A credit needs tax to credit.

Why does no UK tax mean a US bill?

Because the foreign tax credit only offsets tax you actually paid abroad. Income sheltered by a British allowance carries no UK tax, so there is nothing to bring across. The whole amount meets US tax at your normal rate.

The foreign earned income exclusion does not help either. It covers wages and self-employment profits, not investment income. So an American whose salary is fully excluded still owes US tax on UK dividends and interest.

The amounts are usually small, but they arrive every year. In our practice this is the most common reason an otherwise nil US return produces a modest payment.

Are UK dividends qualified for US purposes?

Usually yes, which softens the blow considerably. Dividends from a company in a country with a comprehensive US treaty can qualify for the lower rates of 0%, 15% or 20%. The United Kingdom has such a treaty, so most British company dividends qualify.

Per the IRS guidance on dividends (opens in a new tab), a holding period condition also applies. You generally need to have held the shares for more than 60 days within the 121-day window around the ex-dividend date.

Interest never gets that treatment. Savings interest is ordinary income, taxed at your marginal US rate whatever its source. Nor do most distributions from funds, which follow their own rules entirely.

Why can't your salary credits help?

Because the credit works in separate categories, and the categories cannot borrow from each other. Wages fall in the general category, while dividends and interest fall in the passive category. Surplus credits from one cannot offset tax in the other.

That surprises people who pay far more UK tax on their salary than America would charge. Those excess credits sit unused in the general category while a small passive bill goes unpaid. Our guide to Form 1116 and the foreign tax credit explains how the categories work.

Unused passive credits do carry forward for ten years, and back one. Where UK tax on investment income exceeds the US tax in a later year, those carryovers can finally come into play.

What about gilts and bond interest?

Gilts and corporate bonds pay interest, which America taxes as ordinary income. Britain exempts gains on gilts from capital gains tax, but that exemption does not cross the Atlantic. A gain on selling a gilt is taxable on your US return.

Bond funds are different again, because most UK-domiciled funds count as PFICs. Individual gilts held directly avoid that problem, which makes them simpler for American investors than a bond fund.

Does the timing of a dividend matter?

It decides which US year the income falls in. A dividend paid on 2 January belongs to that new year, even though the UK tax year running at the time ends in April. Sorting UK dividends by payment date stops the same income appearing on two returns.

Accumulation shares complicate this, since income is reinvested rather than paid out. The notional distribution still counts as income, and the date on the fund statement is the one that matters. Fund managers publish the figures a few months after the year end, so build that delay into your filing plan.

Scrip dividends and reinvestment plans

Taking new shares instead of cash does not remove the income. Britain treats a scrip dividend as taxable in most cases, and America taxes the value you received in the same way.

Reinvestment plans work identically. The cash counts as paid to you and then used to buy shares, so the dividend belongs on your return even though nothing reached your bank account. Keep the scheme statements, since they show the value used.

How do you report it properly?

Gather the British figures first, then convert them, because the two tax years never line up. UK statements run to 5 April and your US return runs to 31 December. Work through the following order each year:

1. Collect dividend vouchers and annual interest certificates from each provider.
2. Sort each payment by the date received, not by the UK tax year.
3. Convert each amount to dollars at the rate on its payment date.
4. Report dividends and interest on Schedule B of your Form 1040.
5. Check the holding period on shares to confirm qualified treatment.
6. Claim a credit for any UK tax actually paid on the same income.
7. Answer the foreign account questions and file the FBAR if required.

What if you hold shares through a UK broker?

The broker reports nothing to the IRS on your behalf, and its annual statement follows the UK tax year. You need the underlying payment dates rather than the summary totals.

Most brokers can produce a transaction history covering the calendar year. Download it each January, because older data sometimes disappears when accounts close or platforms merge. Keep the file with your tax records rather than relying on the platform.

The account itself is reportable too. Add its maximum value to your other accounts when testing the FBAR threshold.

A worked example

Take an illustrative example. An American in Manchester holds £40,000 of British shares and £25,000 in savings. She receives £1,300 of dividends and £900 of interest during 2025.

In Britain, £500 of the dividends and all of the interest fall inside her allowances, so she pays UK tax on only £800 of dividends. Her total UK tax on the lot comes to roughly £70.

On her US return, the full £2,200 is taxable. The dividends get qualified rates, the interest does not, and her £70 of UK tax is the only credit available. The result is a small but real US payment on income Britain barely touched.

What about dividends from your own company?

They follow the same qualified dividend rules, provided the company qualifies for treaty benefits. The complication sits elsewhere. An American who owns a UK company faces controlled foreign corporation reporting on Form 5471, whatever dividends are paid.

That reporting can also tax profits you never took out. So owner-directors should look at the company position as a whole rather than at the dividend alone.

Does an ISA change anything?

Not for the IRS. Dividends and interest earned inside an ISA are taxable on your US return exactly as if the wrapper did not exist. Britain exempts them, which again leaves no credit to claim.

Funds held inside an ISA bring a further problem, because the IRS treats most UK funds as PFICs. Our guide to the ISA and PFIC problem explains why those holdings cost far more to report than they earn.

Mistakes and traps with UK dividends

Most errors here come from assuming that tax-free in Britain means invisible in America. These are the ones we see most often: UK dividends are the clearest example.

• Leaving allowance-covered income off the US return entirely.
• Expecting salary credits to cover tax on investment income.
• Using UK tax year totals instead of calendar year figures.
• Assuming all foreign dividends get the lower qualified rates.
• Forgetting brokerage and savings accounts when adding up for the FBAR.
• Ignoring accumulation funds because no cash was ever received.

Accumulation funds deserve particular care. Income reinvested inside a fund is still income, and the PFIC rules apply whether or not anything reaches your bank account.

How US UK Tax Accountants helps

We convert every dividend and interest payment, place it in the right category, and claim the credits that are actually available. Our US federal returns service covers Schedule B, the credit calculation and the account disclosures together.

In our practice the savings come from the ordering rather than the arithmetic. We agree a fixed fee in writing before any work starts.

Check your investment income

If you hold British shares or savings, a short review shows what belongs on your US return and what relief applies. Tell us what you hold and where. You can book a consultation and hear back within one working day.

Last reviewed 16 September 2026 by the US UK Tax Accountants Tax Team. This article is general information, not personal tax advice — speak to a qualified US/UK tax adviser about your own position.