About TaxStone
US–UK tax.
Both sides, done right.
TaxStone is run by qualified accountants and an IRS Enrolled Agent. We're small on purpose — so every return is reviewed by someone who's actually seen your situation before, and every client gets answers from the person doing the work.
Who we are.
For US citizens abroad, Green Card holders, dual nationals, and non-residents with US-source income, TaxStone delivers the clarity, control, and filing rigour of a top-tier cross-border tax practice without the overhead of a big firm. We handle both sides of the equation—US and UK—so every filing works together, strategically, and with integrity.
TaxStone at a glance
The facts, in one place.
- Legal entity
- TaxStone Ltd, 86–90 Paul Street, London EC2A 4NE, United Kingdom
- What we do
- US federal and state tax returns, FBAR and FATCA reporting, PFIC reporting, Streamlined Filing Compliance Procedure catch-up, expatriation filings, US business returns, and US–UK cross-border tax advice.
- Who we serve
- Americans in the UK, British nationals in the US, dual US–UK citizens, Green Card holders, non-resident aliens with US-source income, and people planning a move between the two countries.
- Credentials
- IRS Enrolled Agents (regulated under Treasury Circular 230) and ACCA-qualified accountants. Every return is second-reviewed by an Enrolled Agent before release.
- How we charge
- Fixed fees quoted in writing before any work starts — from £550 (+ VAT for UK-resident clients). No hourly billing and no percentage of tax saved.
- How to reach us
- Work is handled by email so everything is documented. Send your situation via the enquiry form or to hello@taxstone.us; we reply within 2 working days. Office hours Mon–Fri · 9:00am – 6:00pm GMT.
What drives us.
Clarity from complexity.
Cross-border tax is intricate — but confusion is optional. We cut through the noise and translate the most tangled US-UK filing issues into clear, actionable solutions.
Integrity without compromise.
Every position we take is built to stand up — to the IRS, to HMRC, to time, and to your own standards. Defensible. Ethical. Always.
Strategic agility.
Enrolled Agent rigour, boutique responsiveness. We move quickly without cutting corners, keeping you ahead of deadlines and ready for whatever comes next.
Full-picture expertise.
US and UK tax don't live in silos. Neither do we. With both systems under one roof, we deliver complete cross-border strategies, not piecemeal answers.