The US taxes its citizens wherever they live. Britain taxes its residents. If you’re an American living in the UK with dividend income, you’re both. That means two tax authorities, one pool of money, and a treaty that helps – but only up to a point.
The treaty is actually pretty well designed. It’s just that nobody ever explains it properly.
Here’s how it actually works.
First, what HMRC and the IRS each want
As a UK resident, you pay tax on worldwide dividend income. The rate depends on your income tax band:
| Income tax band | Income range | Dividend rate |
|---|---|---|
| Personal allowance | Up to £12,570 | 0% |
| Basic rate | £12,571 – £50,270 | 10.75% |
| Higher rate | £50,271 – £125,140 | 35.75% |
| Additional rate | Over £125,140 | 39.35% |
The first £500 of dividend income each year (across all sources) is tax-free. This is your dividend allowance and sits separately from the band structure above.
The IRS also taxes your dividend income – all of it, regardless of where you live or where the dividend comes from.
The US splits dividends into two categories for tax purposes. Qualified dividends are taxed at the lower rates shown below. Non-qualified dividends are taxed at your regular income tax rate – the same rate as your salary – which can be as high as 37%.
Whether a dividend is qualified depends on two things: it must be paid by a US corporation or certain qualifying foreign companies, and you must have held the stock more than 60 days within a 121-day window starting 60 days before the ex-dividend date.
| Total taxable income (single filer) | Total taxable income (married filing jointly) | Rate |
|---|---|---|
| Up to $49,450 | Up to $98,900 | 0% |
| $49,451 – $545,500 | $98,901 – $613,700 | 15% |
| Over $545,500 | Over $613,700 | 20% |
The bracket that determines your rate is based on your total taxable income for the year, not just your dividend income. So if your salary alone puts you in the 15% bracket, your qualified dividends will be taxed at 15% even if the dividends themselves are a small amount.
The net investment income tax
The 3.8% net investment income tax (NIIT) also applies if your modified adjusted gross income exceeds $200,000 (single) or $250,000 (jointly). The NIIT is a separate federal tax on investment income – including dividends – introduced to help fund Medicare. It applies on top of the rates above, pushing the effective top rate on qualified dividends to 23.8%.
Unlike regular federal income tax, the NIIT sits outside §901 and cannot be offset by foreign tax credits. So even where the treaty and FTC mechanisms eliminate your ordinary US tax liability on the income, the 3.8% NIIT remains due in full. Higher-income readers should treat it as a hard floor on US tax exposure that the credit system cannot reach.
The US-UK tax treaty creates a credit system
How it works: you get credit in one country for tax already paid in the other. How that plays out depends on where your dividends originate.
US-source dividends (from American companies): The UK gives you credit for the US tax you’ve paid. If you own at least 10% of the voting power in the US company paying the dividend, the credit can also cover the underlying US corporate tax on the profits – not just the withholding tax on the dividend itself.
Non-US dividends (from UK or other foreign companies): For dividends from UK or other foreign companies, it works the other way round. The US gives you credit for UK tax paid, with the same 10% voting stock threshold applying for underlying corporate tax.
Article 24(6) is where things get frustrating
The basic problem is this: both countries have agreed to share the relief between them rather than one country stepping aside entirely. Think of it as two landlords who both have a claim on the same rent. The treaty doesn’t decide which one gets paid – it just sets rules for how they split it.
Here’s what that means in practice for you:
- The UK will only give you credit for the US tax you’ve paid on income that it considers to be US-source – not your entire US tax bill.
- The amount of US tax the UK will credit is also capped. It won’t credit more than what the US would charge a UK resident who isn’t a US citizen.
- The US then gives you credit for the UK tax you’ve paid – but only after taking into account whatever credit the UK has already given you.
The end result is that both countries chip in some relief, but neither eliminates the double charge entirely. Exactly how much you pay depends on the size of your dividend income, where it comes from, and the relative tax rates in each country. In most cases this means you end up paying somewhere between what you’d owe in just the UK and what you’d owe in just the US. Rarely full tax twice, but rarely just once either.
What this looks like in practice
Say you’re a US citizen living in the UK, earning a salary that puts you in the higher rate band, and you receive £20,000 in dividends from a US company.
At the higher rate of 35.75%, and after deducting your £500 dividend allowance, your UK tax bill on the dividends is around £6,961 (£19,500 × 35.75%). Assuming these are qualified dividends and you’re a higher-income taxpayer, the IRS federal rate is 15%, giving around $3,690 (~£2,925) in US tax before any credits, using an exchange rate of £1 = $1.26.
The credits work in both directions simultaneously – the UK credits you for US tax paid, and the US credits you for UK tax paid. Each credit is separately capped: the UK Foreign Tax Credit cannot exceed the UK tax attributable to that income, and the US Foreign Tax Credit is subject to its own limitation under §904.
| Tax authority | Before credits | Credit received | Final tax bill |
|---|---|---|---|
| UK tax (HMRC) | £6,961 | ~£2,925 (for US tax paid) | ~£4,036 |
| US tax (IRS) | ~£2,925 | ~£2,925 (for remaining UK tax) | ~£0 |
| Total | £9,886 | – | ~£4,036 |
Rather than paying nearly £10,000 in tax across both countries, the credits bring your total bill down to roughly £4,036 – broadly in line with what a UK-only taxpayer would pay on the same income. The UK rate prevails, and the US credit largely wipes out your American bill.
The non-dom rule change you need to know about
Until April 2025, some US citizens living in the UK benefitted from what was called the remittance basis – a special tax arrangement available to people who live in the UK but consider another country their permanent home (known in tax terms as being non-domiciled, or a “non-dom”). Under this arrangement, you only paid UK tax on foreign income – including foreign dividends – if you actually brought that money into the UK. Leave it sitting in a US bank account and HMRC largely left it alone.
That changed on 6 April 2025. The remittance basis was abolished and replaced with a new system called the Foreign Income and Gains (FIG) regime.
The FIG regime works differently: it’s based on how long you’ve been a UK resident rather than where you consider your permanent home to be. If this applies to your situation, the rules around how your foreign dividend income is taxed in the UK may have changed significantly.
This is an area where the details matter a lot and vary considerably from person to person. If you were previously claiming the remittance basis, or think you might qualify as a non-dom, contact us for specific advice on where you stand under the new rules.
Don’t try to wing it
It’s absolutely possible for Americans living in the UK to manage their dividend tax without paying twice – but it takes attention to get right. The treaty helps, the credits reduce the burden, and the new FIG regime has changed the picture for some people significantly. If any of this applies to your situation, it’s worth a conversation with a tax professional before your next filing deadline.
That’s exactly what Monx is here for – tax services for Americans living in the UK. We’d be glad to help.
