UK Tax Returns for American Expats

Greenback’s UK Tax Return service includes complete preparation and electronic submission of one UK Self-Assessment Tax Return to HMRC, coordinated directly with your assigned U.S. Greenback accountant. The service covers account setup, identity verification (required for new UK clients), an online UK questionnaire, all relevant supplementary forms (employment, self-employment, foreign income, capital gains, and residency, where applicable), and final filing. Pricing is flat-fee with VAT included.

Greenback’s UK Tax Return Preparation is a flat fee of $910 USD, including VAT. A Spouse UK Tax Return (Mirror Return) is $565 USD. A Mirror Return with FIG Scheme is $820 USD. Telephone and email consultations range from $190 to $300 USD. All pricing is flat-fee, with no hourly billing and no surprise charges. See Greenback’s full expat tax pricing calculator.

Greenback offers a full set of cross-border services for Americans living in the UK: UK Self-Assessment Tax Return preparation, a reduced-fee Spouse UK Tax Return (Mirror Return) when both spouses must file, the Mirror Return with FIG Scheme add-on for qualifying new UK residents, joint U.S./UK tax consultations, standalone UK telephone or email consultations, and coordinated preparation of your U.S. federal expat tax return. All UK work is performed by a UK Chartered Accountant, in coordination with a U.S. CPA or Enrolled Agent under a single Greenback account.

Yes. Greenback’s UK Tax Return service is sold standalone or bundled with Greenback’s U.S. federal tax service. You can hire Greenback just for the UK return, whether you’re a U.S. expat who already has a U.S. preparer or a UK-only filer who is not a U.S. taxpayer. The flat fee of $910 USD covers the UK return regardless of whether Greenback also prepares your U.S. return. If you keep your own U.S. preparer, Greenback’s UK Chartered Accountant can coordinate with them to avoid double taxation or treaty errors.

UK Self-Assessment returns at Greenback are prepared by a UK Chartered Accountant with 20+ years of UK tax experience. They work directly with your assigned U.S. Greenback accountant, who is a CPA or IRS Enrolled Agent, so both returns are coordinated. You communicate with both accountants through your secure Greenback account. Greenback does not outsource UK returns to junior preparers. Meet Greenback’s accountants.

A Mirror Return is the second spouse’s UK Self-Assessment return, used when both spouses have a UK filing requirement, since the UK does not allow joint filing. Greenback offers it as a reduced-fee add-on at $565 USD, drawing on shared information from the primary return to keep the two filings aligned. Greenback also offers a Mirror Return with FIG Scheme variant for qualifying new UK residents at $820 USD.

A UK Self-Assessment return prepared by Greenback always includes the main SA100 tax return, plus any supplementary forms that apply to your situation: SA102 (employment income), SA103 (self-employment), SA105 (UK property and rental income), SA106 (foreign income), SA108 (capital gains), and SA109 (residency, remittance basis, and FIG regime claims). Greenback’s UK Chartered Accountant determines which supplementary forms apply based on your intake questionnaire, so you don’t need to know in advance.

Yes. Greenback offers a free 15-minute kick-off call with a UK Chartered Accountant before you commit to a return. You can schedule it by phone or email through the sign-up form on the services page. The call covers your situation, which Greenback services apply to you, the process, and timing. Get Started with Greenback to begin.

Paid options for deeper guidance are available through Greenback’s expat tax consultation service.

Greenback needs a valid Unique Taxpayer Reference (UTR) from HMRC and your income details for the UK tax year: wages, rental income, investments, self-employment records, and any income earned outside the UK. If you don’t yet have a UTR, Greenback will guide you through the application process (online via HMRC if you have a National Insurance number, or by mailing a paper form if not).

Not always. Greenback’s UK Chartered Accountant and your U.S. Greenback accountant determine the filing sequence on your kick-off call, based on your income sources. Because both returns are handled under one Greenback account, the two accountants coordinate directly so foreign tax credits, treaty positions, and timing all line up.

Yes. Greenback’s UK Chartered Accountant and U.S. CPA or Enrolled Agent work together to apply every available treaty and credit relief so you don’t pay U.S. tax on income already taxed in the UK. Dual-citizen filings are a common scenario at Greenback.

Most UK returns are completed within 3 to 4 weeks of Greenback receiving your full questionnaire and supporting documents. The exact timeline depends on the complexity of your return, how quickly you respond to follow-up questions, and where we are in the UK tax season. The standard online UK Self-Assessment filing deadline is January 31 following the end of the UK tax year (which runs from April 6 to April 5). Greenback’s UK Chartered Accountant will confirm a clearer estimate after the kick-off call.