US & UK tax accountants in London and UK


Xerxes Associates LLP are expert specialist US & UK tax advisers based in London with over 10 years of valuable experience. As US and UK tax accountants, we offer a professional, responsive and personalised service to all US and UK expats.


We work closely with US and UK expats from all different backgrounds, circumstances and occupations as well as high-net worth individuals in order to help them through the complexities of US and UK tax compliance requirements.


As UK & US Tax Accountants, Xerxes Associates LLP offer more than just the basic advisory and tax return preparation services. We also offer all of the required key services to expats in both the United States and United Kingdom.

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    We offer a private client relationship, helping you to overcome even the most complex situations, so please get in touch and one of our trusted partners will respond to your enquiry within 48 hours.

    US & UK Tax Accountants In London & UK

    As part of our US & UK expat services, we offer the following tax services, along with a bespoke service tailored to your individual needs.

    US Federal & State Income Tax Returns

    US Federal & State Income Tax Returns

    We complete US Federal and State income tax returns as required by the IRS and State authorities by a team of experienced IRS Enrolled Agents, who understand all the complexities of expat tax preparation…

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    UK Self Assessment Tax Returns

    UK Self Assessment Tax Returns

    In addition to our comprehensive US individual tax compliance services, we also complete UK Self Assessment Tax Returns, with qualified ICAEW accountants as part of our growing team…

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    Consulting and Planning

    Consulting & Planning

    Require a bit more advice, perhaps in preparing for future moves, family or business changes? We offer a full range of consulting and planning services…

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    Even more

    Even more…?

    Be assured by expert assessment and confidentiality from our team of trusted partners. Discuss your circumstances by requesting a callback or contact us today…

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    US & UK Tax Updates

    Our Latest Articles

    US Expat Tax Advice When Living In the United Kingdom

    A PAYE system is used by most UK employers to withhold taxes from employees’ paychecks.
    You will need to file a UK tax return if ‘any’ of the following applies to you;

    US Tax Returns And Tax Planning For US Citizens Living In The UK

    Xerxes Associates LLP have been preparing US taxes for Americans living in the UK for over 20 years. We are experts in all aspects of US tax procedures and we offer a professional, responsive and personalised service to all US and UK expats. Every US citizen including Green Card holders (equivalent to a permanent stay [...]

    Choosing The Right US Expat Tax Advisor

    Who Can Provide US Expats With Expat Accountant Service And Expat Tax Assistance? Xerxes Associates LLP are expert specialist US & UK tax accountants and advisers based in London with over 10 years of valuable experience. As US and UK tax accountants, we offer a professional, responsive and personalised service to all US and UK [...]

    FBAR Tax & PFIC 8621 Tax Forms Explained

    What Is A FBAR And Who Needs To File One? An FBAR form must be filed by all U.S. citizens, residents, corporations, partnerships, limited liability companies, trusts, and estates. The purpose of an FBAR is to notify a financial interest in a bank account including any type of authority over a financial account which is [...]

    Expat Tax Advice: If You Received A Letter From The IRS, Here’s What You Should Do

    The IRS sends millions of notices to taxpayers every year. Reasons for sending these letters vary. The following list contains ten simple steps you should take when this notice arrives. 1. It shouldn't be ignored. The IRS mostly sends letters and notices in connection with federal tax returns. The letter or notice will tell you [...]

    What Are Tax Extensions & Why Do You Need Them?

    What are the most common reasons for not filing an IRS Tax extension? - IRS may raise a red flag when you extend, increasing your audit risk - I'm always late filing my tax returns - I may be late in October as well if I file an extension. - Everything I need for my [...]

    US Expat Tax Requirements In The UK

    Being an US expat in the UK can be very difficult – especially when you have to deal with the US tax process. Working with us makes it much easier! That’s why we are working hard to earn your trust. Our team works seamlessly, which means you only have to focus on what matters most – enjoying your overseas experience!

    We provide US/UK tax advisory services to individuals across a variety of sectors and industries. We provide sound advice from start to finish by providing expert tax-related compliance guidance and assistance in navigating complex situations related to your taxation. Xerxes Associates LLP specialises in meeting the specific needs of U.S. & UK citizens living abroad, and we have a team on hand to ensure that you comply with applicable tax laws

    US Expat Tax Services In UK

    Contact us

    Our market beating fee starts at £299 + VAT for UK Self Assessment Tax Return. Please call, e-mail us or use our contact form if you would like to discuss your requirements.

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