Does HMRC know about my US LLC?

Under the Common Reporting Standard (CRS) — the international equivalent of FATCA — UK financial institutions share account information with HMRC and HMRC shares UK account information with other tax authorities, including the IRS. If you hold a US LLC bank account funded from your UK bank, that information may flow to the IRS through information exchange agreements. This is one reason IRS compliance for UK-owned US LLCs has increased significantly since 2020.

Do I need to declare my US LLC income on my UK Self Assessment?

UK residents are generally taxed on worldwide income. Income earned through your US LLC may be reportable on your UK Self Assessment tax return depending on your UK residence status and domicile. You should consult a UK tax adviser with international experience, as this is separate from your US Form 5472 filing obligation.

Does the US-UK tax treaty eliminate my Form 5472 obligation?

No. The US-UK tax treaty governs income tax, not information return filing requirements. Form 5472 is an information return with no associated tax — it is not a tax return. Tax treaty provisions do not exempt you from US information reporting obligations.

What is the best UK bank for funding a US LLC?

Transferwise (Wise), Barclays, and Starling Bank are commonly used by UK entrepreneurs to fund U.S. LLCs. The choice of bank does not by itself determine the Form 5472 analysis. A transfer from an owner to an entity may need to be evaluated as a related-party transaction under the entity's facts and current IRS instructions.

My US LLC is my Amazon FBA business — do I still need to file Form 5472?

Possibly. Amazon activity and foreign ownership do not alone determine the obligation. Review the entity classification and reportable related-party transactions; owner funding and distributions may require evaluation under the current IRS instructions.

Form 5472 Filing — CPA-Reviewed, $299 All-In

Form5472.ai

Form 5472 for UK LLC Owners

UK entrepreneurs with U.S. LLCs can review when Form 5472 may apply, plus UK-specific considerations, the U.S.-UK tax treaty, and HMRC interaction.

Form 5472 Filing — CPA-Reviewed, $299 All-In