US LLCs and UK Tax: The Anson v HMRC Double-Taxation Trap (2026 Update)

UK residents forming a US LLC run into a problem founders from most other countries don't face: the US and the UK don't agree on what kind of entity your LLC even is. The US treats it as transparent (a flow-through, like a partnership); HMRC generally treats it as opaque (like a corporation). That mismatch can create genuine double taxation — and as of August 2026, the UK government is actively considering a fix, but hasn't implemented one yet.

This guide covers where that risk comes from, what the landmark Anson v HMRC case did and didn't settle, and where the current 2026 reform effort stands.

Why the Mismatch Happens

For US federal tax purposes, a single-member LLC is disregarded and a multi-member LLC defaults to partnership treatment — either way, profits pass through and are taxed on the members as they arise, with no entity-level US tax in between.

HMRC sees it differently. In the absence of a UK "check-the-box" style regime, HMRC classifies foreign entities as either "opaque" (taxed like a company) or "transparent" (taxed like a partnership) based on case law and its own International Manual guidance. For Delaware LLCs specifically — and US LLCs generally — HMRC's default position is that they're opaque for UK tax purposes. That means a UK-resident member is taxed on distributions received from the LLC, not on their share of profit as it's earned inside the LLC.

The Double-Taxation Risk in Practice

Put the two systems together and you get a genuine mismatch:

• The US taxes the member on their share of the LLC's profit as it arises, regardless of whether it's distributed.
• The UK taxes the member on distributions, when they're actually received — a different point in time, and a different type of income in HMRC's eyes.
• Because HMRC can treat "a distribution" and "a share of profit" as two different categories of income, a foreign tax credit for the US tax already paid isn't automatically available against the later UK tax on the distribution — HMRC's general position requires the credit to be claimed against income of the same type.

The result: US tax paid on profits as they're earned, and UK tax later due on the distribution of those same profits, without a guaranteed credit connecting the two. That's real, not theoretical, double taxation — not a paperwork inconvenience.

Anson v HMRC: What It Did and Didn't Establish

Anson v HMRC is the case UK advisors reference constantly on this topic, and it's worth understanding precisely what it settled — because it's narrower than it's often assumed to be.

Mr. Anson was a UK resident, non-domiciled individual and a member of a Delaware LLC. The UK Supreme Court ultimately ruled in his favor, finding — based on the specific facts and the particular LLC agreement's terms — that the profits belonged to the members as they arose, not to the LLC itself, and allowed him a credit for the US tax paid.

HMRC's response, though, was explicit: it does not treat Anson as a decision of general application. HMRC's updated guidance (in its International Manual, most recently revised) states it will continue to treat US LLCs, particularly Delaware LLCs, as opaque for UK tax purposes as a general matter, and will consider Anson-style credit claims case by case rather than as an automatic entitlement. In other words: winning double-tax relief the way Mr. Anson did isn't guaranteed just because your situation looks similar — it depends on your specific LLC agreement's terms closely matching the facts that made his case succeed.

The 2026 Consultation: A Possible Fix, Still Pending

This is the genuinely current development worth knowing about: on June 10, 2026, HMRC opened a formal consultation on reforming the UK tax treatment of US LLCs and other "reverse hybrid" entities — specifically considering whether to provide matching transparent tax treatment for qualifying UK residents who are members of US LLCs that are transparent in the US.

The consultation closed on July 31, 2026. As of the time of writing, no legislation has been introduced, and the existing opaque-by-default treatment remains in force. If enacted, a matching-transparency rule would directly fix the mismatch described above for LLCs that qualify — but until it actually becomes law, plan around the current rules, not the proposed ones.

Practical Ways Founders Manage This Today

Until (or unless) reform changes the default treatment, a few approaches reduce the practical risk:

• Structure the LLC agreement deliberately, rather than relying on default terms. Some advisors suggest building in an intervening decision-making step between the LLC earning profit and distributing it (rather than distributions following automatically), which can support an argument that the entity behaves differently from Mr. Anson's — though this cuts both ways and needs specialist input, not a DIY template change.
• Time distributions carefully in consultation with a UK tax advisor, since the mismatch is partly about timing (US taxes as earned, UK taxes as distributed) — thoughtful planning around when distributions happen can reduce, though not eliminate, the practical exposure.
• Get UK-specific advice before your first distribution, not after. Once profits have been taxed in the US and a distribution has already been made, your planning options narrow considerably.

Common Mistakes

• Assuming Anson settled the issue for all US LLCs. HMRC has explicitly said it hasn't — it's assessed case by case, tied to your specific LLC agreement's facts.
• Assuming the 2026 consultation means the rules have already changed. As of this writing, they haven't — the consultation closed, but no legislation has followed yet.
• Treating this as a US-side problem. It isn't — your US filing obligations (Form 5472, pro forma 1120, and so on) proceed independently of this UK-side classification question.
• Waiting until after a distribution to get advice. The planning window that actually helps is before profits are earned and distributed, not after the fact.

Frequently Asked Questions

Does this affect every UK resident with a US LLC, or only certain structures?

It's most relevant to UK-resident individuals who are members of a US LLC that's transparent for US tax purposes but treated as opaque by HMRC — which, per HMRC's default position, is most US LLCs, particularly Delaware ones. Your specific exposure depends on your LLC's structure and distribution pattern.

Can I just claim the Anson precedent on my own tax return?

Not safely, on its own. HMRC treats Anson as confined to its specific facts and reviews similar claims case by case — you'd need your LLC's actual terms and circumstances to closely resemble what made that case succeed, which is a judgment call worth making with a UK tax advisor rather than assuming.

Should I wait for the consultation outcome before forming my LLC?

Not necessarily — LLC formation and this UK tax question are separate decisions. Many founders proceed with formation for the underlying US-business reasons (liability protection, access to Stripe/banking, US market credibility) and manage the UK tax side with proper structuring and advice, rather than pausing indefinitely for a reform that may or may not happen on any particular timeline.

Does my US Form 5472 filing change based on how the UK classifies my LLC?

No — Form 5472 and the pro forma Form 1120 are US federal filing obligations tied to foreign ownership of the LLC, independent of how HMRC classifies the entity for UK purposes.

Information reviewed August 2026. This is a genuinely complex, fact-specific area of UK tax law under active reform consideration — this guide is not a substitute for advice from a UK tax advisor familiar with your specific LLC structure and circumstances.

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