US & UK · Calculator
Do I need to file? US and UK checker
Check which returns apply to you this year: the US Form 1040 filing threshold, FBAR, Form 8938 for taxpayers abroad and HMRC's Self Assessment triggers, with the reason for each.
United States
Before any foreign earned income exclusion.
Add each account's highest balance in the year.
United Kingdom (tax year 6 April 2025 to 5 April 2026)
Not required on these answers
US federal return (Form 1040), tax year 2025
Gross income is below the $15,750 threshold for your status. Filing may still be worthwhile, for example to claim refundable credits.
More on thisNot required on these answers
FBAR (FinCEN Form 114)
Your non-US accounts together stayed at or below US$10,000.
More on thisNot required on these answers
Form 8938 (FATCA), filed with the return
Below the thresholds for taxpayers living abroad ($200,000 year end / $300,000 any time).
More on thisNot required on these answers
UK Self Assessment return (SA100), tax year 2025/26
None of HMRC's main triggers apply on these answers. HMRC can still send you a notice to file, which you must follow.
More on thisIndicative only and not stored. Filing thresholds shown are for filers under 65. Other forms (8621, 3520, 5471) depend on what you own; the forms list explains each.
Assumptions and limits
- US filing thresholds are the 2025 standard deduction for filers under 65 ($5 for married filing separately); gross income includes foreign earned income you later exclude.
- Net self-employment earnings of $400 or more always require a US return.
- FBAR uses the combined highest balances of all non-US accounts; Form 8938 uses the thresholds for taxpayers living abroad.
- UK triggers follow GOV.UK 'Who must send a tax return' for 2025/26. HMRC's own checker and any notice to file take precedence.
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This is an estimate for orientation, not advice. We confirm the position on your facts before any filing.
Written by the US UK Expat Tax advisory team. Last reviewed 9 November 2026 · Figures relate to the 2025 / 2025-26 tax year unless stated.
Primary sources checked
General information, not personal tax advice. Rules and thresholds change; we confirm the position for your facts before any work.
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Where you live, which years are involved, what has been filed, and every source of income in each country. We reply by email within two working days with what is needed and a written fee. No free consultations, and no work starts before you have the quote.