To avoid double taxation between the US and UK, individuals should utilize the US-UK Tax Treaty, Foreign Tax Credit (Form 1116), and the Foreign Earned Income Exclusion (Form 2555). These mechanisms allow taxpayers to offset taxes paid to one country against liabilities in the other, often resulting in no additional tax burden for expats, especially given typically higher UK taxes.
If you're a US citizen or green card holder living in the UK, it's important to understand the US–UK tax treaty. It can help you avoid double taxation, meaning you won't be taxed twice on the same income in both the US and the UK, potentially saving you thousands of dollars in taxes.
Foreign Earned Income Exclusion (FEIE)
The FEIE allows you to exclude a significant portion of your foreign earned income from U.S. taxation. For tax year 2025 (filed in 2026), you can exclude up to $130,000. If you're married and both spouses qualify, you can each claim the exclusion for a combined total of $260,000.
To avoid the UK's 60% tax trap (an effective 60% rate on income between £100k-£125k), the key is to reduce your adjusted net income back below £100,000 by making tax-efficient contributions, primarily via pension contributions, which reclaim your full £12,570 Personal Allowance, and also through salary sacrifice for benefits like childcare or cycle-to-work, and Gift Aid donations to charity.
You may be taxed on your UK income by the country where you're resident and by the UK. You may not have to pay twice if the country you're resident in has a 'double-taxation agreement' with the UK. Depending on the agreement, you can apply for either: partial or full relief before you've been taxed.
Yes, U.S. citizens living abroad generally must file U.S. taxes on their worldwide income, creating a risk of double taxation, but mechanisms like the Foreign Earned Income Exclusion (FEIE) and the Foreign Tax Credit (FTC) help avoid paying taxes twice on the same earnings by allowing exclusion or credit for taxes paid to foreign countries. These tools, claimed by filing a U.S. return (Form 1040), significantly reduce or eliminate U.S. tax liability for many expats.
If you return to the UK within 5 years
You may have to pay tax on certain income or gains made while you were non-resident. This doesn't include wages or other employment income.
FAQs on UK Taxation
Why do the rich pay less tax? The rich often pay less tax due to the use of tax-efficient strategies, such as investing in capital gains assets, maximising pension contributions, and utilizing tax-advantaged accounts like ISAs.
Yes, £100k is a very good salary in the UK, placing you in the top 5% of earners and allowing for a comfortable lifestyle, though its real value depends heavily on location (especially London vs. rest of UK) and personal responsibilities like family and mortgage, as high taxes (including the "60% tax trap") and living costs can significantly impact disposable income.
The IRS 7-year rule primarily applies to keeping records for claiming a deduction for bad debts or losses from worthless securities, allowing a longer period to file for a credit or refund, but it's not a universal audit limit; it's often a recommended safe buffer for general record-keeping, with the standard IRS audit period usually being 3 years, extending to 6 years for substantial income omission (over 25%) or foreign income issues, and indefinitely for fraud.
Your name appears on foreign financial accounts passed on to the IRS. Your children, applying to universities in the US, provide information about your income sources. Your name appears in another US expat's foreign business documents or tax returns submitted to the IRS.
Quick answer: UK income tax rates (20-45% across 3 brackets) appear higher than US federal rates (10-37% across 7 brackets), but many US states add 5-13% state income tax on top. The UK offers a £12,570 personal allowance vs US $14,600 standard deduction (single) or $29,200 (married filing jointly) for 2025.
If you're not UK resident, you will not have to pay UK tax on your foreign income. If you are UK resident, you'll normally pay tax on your foreign income. You may not have to if you're eligible for Foreign Income and Gains relief.
US Social Security paid to a UK resident is taxed in the UK, not in the US. The repeal of WEP/GPO increases benefits for many affected claimants from benefits payable in 2024 onward.
Beating the 60% tax trap: top up your pension
One of the simplest ways to avoid the 60% income tax trap is to pay more into your pension. This is a win-win, because you reduce your tax bill and boost your retirement fund at the same time. Here's an example. You get a £1,000 bonus, which takes your income to £101,000.
Taking Advantage of Capital Gains, Not Salary
One of the biggest reasons Bezos pays little in personal income tax is that he doesn't rely on a traditional salary. Instead, he holds most of his wealth in Amazon stock. Here's why this matters: Capital gains taxes are much lower than income taxes in most cases.
A provision in the laws governing taxation that allows people to reduce their taxes. The term has the connotation of an unintentional omission or obscurity in the law that allows the reduction of tax liability to a point below that intended by the framers of the law.
As the recipient, you do not pay tax on a gift of £50,000. For the giver, this would be a Potentially Exempt Transfer. As long as they live for seven years after giving it, it will be entirely free of Inheritance Tax.
You're usually non-resident if either: you spent fewer than 16 days in the UK (or 46 days if you have not been a UK resident for the 3 previous tax years) you worked abroad full-time (averaging at least 35 hours a week), and spent fewer than 91 days in the UK, of which no more than 30 were spent working.
The complexity of the UK tax system makes it very difficult for people to understand. Participants saw the system as complex because of multiple tax types; complicated band structures; numerous personal circumstances affecting tax rates; overlapping taxes on the same income, and confusing jargon.
In this article
Many business expenses are 100% deductible, including advertising, employee wages, rent, supplies, and certain business meals like company parties or meals for the public, while personal deductions like student loan interest or charitable donations (depending on the type) can also be fully deductible for individuals. The key is that the expense must be "ordinary and necessary" for your trade or business or meet specific IRS criteria, often differentiating from the 50% rule for client meals.