US Military UK Tax: What's Different for Service Members, Civilians and Government Employees

US military UK tax rules work differently from those for other Americans in Britain: pay from the US government to a member of the US forces, or its civilian component, stationed in the UK is exempt from UK income tax, and time spent there in that service is ignored for UK residence. The service member still files a US return, cannot use the foreign earned income exclusion on that pay, and still reports UK bank accounts on the FBAR.

Most of our guidance for Americans in the UK assumes a person who moved for a private job, pays UK tax through PAYE and then uses the US-UK treaty and foreign tax credits to avoid paying twice. US service members, Department of Defense civilians and other US government employees posted to Britain sit outside that model. The UK largely steps back from taxing them, and the US keeps taxing them as if they had never left. The gaps appear at the edges: a spouse who takes a local job, a contractor who assumes the base exemption covers them, a UK savings account that quietly crosses the FBAR threshold, or a retiree who stays on in England.

This guide sets out the rules on both sides, with each point tied to the official source. UK references are to HMRC's International Manual and the Income Tax (Earnings and Pensions) Act 2003, section 303. US references are to IRS Publication 3, the Armed Forces' Tax Guide, which for its current edition is for use in preparing 2025 returns. For the wider picture, see our page on US military UK tax and other tax help for Americans in the UK.

Do US military members pay UK tax on their pay?

No, as long as they are not British citizens. Section 303 of the Income Tax (Earnings and Pensions) Act 2003 says no liability to income tax arises on earnings paid by the government of a designated country to a member of a visiting force of that country, or of its civilian component. HMRC's guidance at INTM860600 lists the USA as a designated country, both in its main list and in the list of forces based in the UK under the NATO Status of Forces Agreement.

The exemption has three limits that matter in practice:

• It covers only pay from the US government. Basic pay, allowances and other emoluments from the US government are exempt. Income from any other source is not covered by section 303.
• It does not apply to British citizens. Section 303 excludes British citizens, British overseas territories citizens, British Nationals (Overseas) and British Overseas citizens. A US service member who is also a British citizen does not get the UK exemption on military pay.
• It needs proof of status. HMRC's guidance at INTM860620 asks claimants for a passport or equivalent document, and says a UK residence permit or residence card is not equivalent to a passport for this purpose.

Section 303(2) extends the same treatment to members of a designated country's armed forces attached to a designated international military headquarters, which can matter for Americans posted to NATO roles in the UK.

UK residence: days on the base do not count

The UK normally decides residence with the statutory residence test, which counts days spent in the UK. For the visiting forces, HMRC's guidance at INTM860630 says to ignore the period an individual spent in the UK solely in the service of the visiting force. That applies to members of the force and its civilian component who are entitled to the exemption, and to their dependants. Where such a person would otherwise be treated as UK resident, HMRC gives the full personal allowance against any income that is chargeable to UK tax.

The practical effect is that a US service family on a three-year posting is not pulled into UK tax on its worldwide income simply by living in England. Our guide to the statutory residence test explains how the ordinary day-counting rules work for everyone else.

Who counts as a member of the force or civilian component?

The exemption depends on status, not location. Working on a US base in Suffolk or Oxfordshire is not enough on its own. The table below summarises how the main groups of Americans connected with the US forces are usually treated.

Person	UK tax on the main pay	US tax on the main pay	Source
US service member (not a British citizen)	Exempt under ITEPA s.303	Taxable; no foreign earned income exclusion	INTM860600; IRS Pub 3
Member of the civilian component, e.g. a DoD civilian employee	Exempt under ITEPA s.303 if status is shown	Taxable; no foreign earned income exclusion	INTM860620; IRS Pub 3
Other US government employee in the UK, not part of the forces	Generally taxable only in the US under treaty Article 19(1), unless a UK national resident in the UK	Taxable; no foreign earned income exclusion	Treaty Art. 19; IRS FEIE guidance
Private defence contractor's employee	Almost always taxable in the UK	Taxable; foreign earned income exclusion or foreign tax credit available	INTM860620
Spouse working for a UK employer	Taxable in the UK on that salary	Taxable; foreign tax credit for the UK tax	ITEPA s.303 scope

Defence contractors: the most common misunderstanding

HMRC is blunt on this point. INTM860620 says an individual employed by a private company contracted to work on a defence contract will almost always not qualify as a member of a civilian component. It adds that the fact UK immigration rules may classify a contractor's staff as an "international civilian employee" is not relevant for UK tax.

A contractor working on a UK base is therefore normally taxed in the UK like any other employee working here, and is subject to the statutory residence test in the ordinary way. The upside is on the US side: because the pay comes from a private employer, not the US government, the contractor can usually choose between the foreign tax credit and the foreign earned income exclusion. Our comparison of the FEIE and the foreign tax credit for UK earnings explains which usually works better at UK tax rates.

US government employees outside the forces

Americans working in the UK for a US government agency that is not part of the visiting force, for example at a US government office in London, look to the treaty instead. Article 19(1) of the 2001 UK-USA Double Taxation Convention says salaries paid by a state for services rendered to that state are taxable only in that state. The exception hands the taxing right to the other country where the services are rendered there and the individual is resident there and is a national of it, or did not become resident there solely to do the work. A US citizen sent to London by a US agency normally falls in the first rule: the UK does not tax the salary. Diplomats and consular officers have separate treatment under Article 28 of the treaty.

How the US taxes military members stationed in the UK

The US taxes a service member's pay as if they had never left. The UK exemption creates no UK tax to credit, and the usual escape route for Americans abroad is closed: IRS Publication 3 says military and civilian employees of the US government are not eligible to elect the foreign earned income exclusion. The IRS page on what counts as foreign earned income lists pay received as an employee of the US government among the amounts that are not foreign earned income.

What does help is the list of excluded military allowances. Publication 3 lists housing and cost-of-living allowances abroad paid by the US government, and the Overseas Housing Allowance (OHA), as excluded from gross income. Those amounts do not go on the return at all, which for a family renting off base in East Anglia can be a large share of total compensation.

Filing deadlines: the automatic June 15 extension

A US citizen or resident in military or naval service on duty outside the United States and Puerto Rico on the regular due date gets an automatic two-month extension to file. The IRS page on the automatic 2-month extension says that for calendar-year filers the extended date is June 15, moved to the next business day if it falls on a weekend or legal holiday. No Form 4868 is needed; Publication 3 says to attach a statement to the return showing you qualify.

The extension covers filing, not payment. The IRS says interest is charged on any tax not paid by the regular April 15 due date. Our guide to the automatic two-month extension for US expats covers how it interacts with Form 4868 and the October deadline.

What income is not covered by the exemption?

Section 303 exempts earnings paid by the US government. Everything else the family receives needs its own analysis, and this is where most UK tax problems for military households start.

1. A spouse's UK salary. Pay from a British employer is not paid by the US government to a member of the force, so section 303 does not reach it. The spouse is normally taxed in the UK through PAYE on that salary, even though their time in the UK as a dependant is ignored for residence. The same salary goes on the US return, with the UK tax claimed as a foreign tax credit.
2. Self-employment in the UK. A spouse who starts a business in the UK, from tutoring to photography, should take advice before trading; the exemption does not cover it, and UK registration rules may apply.
3. Income from UK property or investments. HMRC's visiting forces guidance does not extend the exemption to these. A family that buys a house in England and lets it when posted elsewhere should look at both countries' rules; see our guide for US citizen landlords with UK rental property.
4. Dual US-UK citizens. A service member who is also a British citizen is outside section 303 altogether and should get specific advice before assuming any UK exemption.

HMRC's own manual says any case not covered by its lists should be referred to its specialist immunities and privileges team, which shows how fact-specific the edges of this exemption are.

FBAR and UK bank accounts for service members

Military status gives no exemption from US foreign account reporting. The IRS FBAR page requires a US person to file FinCEN Form 114 when the aggregate value of their foreign financial accounts exceeded $10,000 at any time during the calendar year. The FBAR is due April 15, has an automatic extension to October 15, and must be filed electronically through FinCEN's BSA E-Filing System.

A UK current account opened to pay rent and bills, a spouse's UK salary account, or a Cash ISA all count as foreign accounts. The threshold is aggregate, so two modest UK accounts can cross it together. Our guide to FBAR requirements for expats explains who must file and how to value each account, and our foreign income and FBAR reporting service handles the filing alongside the return.

What people get wrong about US military UK tax

• "The base exemption covers the whole family." It covers pay from the US government to members of the force and civilian component. A spouse's job with a UK employer is outside it.
• "Contractors on base are treated like DoD civilians." HMRC says contractor staff will almost always not qualify as a civilian component.
• "I'm abroad, so I can exclude my pay." The foreign earned income exclusion is not available on US government pay, military or civilian.
• "Article 19 means the US cannot tax me." For US citizens, the treaty's saving clause lets the US tax its own citizens; Article 1(5)(b) preserves Article 19 only for people who are neither citizens nor green card holders of the country granting the benefit. Our article on the saving clause in the US-UK tax treaty sets this out.
• "June 15 means I can pay in June." Interest runs from April 15 on any unpaid tax.

Illustrative example: a US Air Force member who is not a British citizen is posted to a base in Suffolk with a spouse and two children for three years from summer 2026. The member's military pay is exempt from UK income tax under section 303, the family's time in England is ignored for UK residence, and the Overseas Housing Allowance stays off the US return. The spouse takes a job with a local company in 2027. That salary is taxed under PAYE for 2027/28, reported on the couple's 2027 US return, and the UK tax is claimed as a foreign tax credit. The couple's UK joint current account and the spouse's salary account together pass $10,000 in the spring, so an FBAR is due for 2027. The return goes in by June 15 under the military extension, with an estimate paid by April 15 to avoid interest.

Retiring in the UK after US government service

Some service members and civilians stay on in Britain after their last posting. At that point the visiting forces exemption stops applying, because the person is no longer in the service of the force, and they become subject to the UK statutory residence test like anyone else. Article 19(2) of the treaty then deals with government pensions: a pension paid by a state for services rendered to that state is taxable only in that state, unless the individual is both resident in and a national of the other state.

For a US citizen who is not a British national, that generally keeps US government retired pay taxable only in the US, even while living in England. A retiree who is also a British citizen can find the position reversed, with the UK taxing the pension and the US still taxing its citizen under the saving clause, relieved by a foreign tax credit. Our guide to Article 19 and public-service pensions for American teachers and NHS staff walks through the same article from the UK public-sector side.

How we help military and government families

US/UK Cross Border Tax is US CPAs and UK tax advisers working as one team, with offices in London, Manchester, New York and San Francisco. For military and US government households we confirm which income the UK exemption covers, prepare the US return with the correct military exclusions and extension statement, handle the FBAR, and deal with HMRC on a spouse's UK income or a post-service move into UK residence. If a posting to the UK is coming up, or you are about to leave the service and stay, contact us for a review of both sides before the first return is due.