A Complete Guide to Filing U.S. Taxes from the UK
By US-UK Tax Advisors · Last updated DEC 21, 2025
Learn the essential steps for filing your U.S. tax returns while living in the United Kingdom. Our comprehensive guide covers deadlines, required forms, and common deductions for American expats.
Key Takeaways
- Covers tax guide for US-UK cross-border taxpayers
- Applies to US persons with UK ties and UK residents with US income
- Highlights the filing, reporting and tax-treaty points to check
- Get personalised advice before acting on your own facts
Introduction
Filing U.S. taxes from the UK can seem daunting, but with proper guidance and understanding of the process, it becomes manageable. This comprehensive guide walks you through everything you need to know.
Key Filing Requirements
As a U.S. citizen or green card holder living in the UK, you must file a U.S. tax return annually if your income exceeds certain thresholds, regardless of where you live.
Important Deadlines
The standard deadline for filing is April 15th. However, U.S. citizens abroad typically receive an automatic two-month extension to June 15th.
Common Forms and Deductions
Learn about essential forms such as Form 1040, FBAR (FinCEN Form 114), and how to claim the Foreign Earned Income Exclusion (FEIE).
Next Steps
Contact our team of specialist tax advisors to ensure your return is filed correctly and you maximize available reliefs.
Authoritative Sources
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