UK Tax on a US LLC: The Hybrid Mismatch Explained

In most cases, HMRC treats a US LLC as an opaque entity, meaning it is looked at like a company rather than a partnership. HMRC's manual guidance (INTM180050) states that HMRC generally considers Delaware and other US LLCs to be opaque for UK tax purposes, because it views the profits as belonging to the LLC in the first instance rather than to the members. The practical consequence for a UK-resident member is that you are generally not taxed on the LLC's underlying profits as they arise. Instead, you are taxed only when the LLC distributes profit to you, and that distribution is usually treated as a dividend from a foreign company.

That matters because of the UK dividend rules. From 6 April 2026, UK dividend tax rates rose by two percentage points at the two lower bands: the ordinary rate is now 10.75%, the upper rate is 35.75%, and the additional rate remains 39.35%, with only a £500 dividend allowance. So a higher or additional-rate UK member who receives an LLC distribution faces a UK dividend charge of up to 39.35% on that distribution.

The trap is what happens on the US side in the meantime. If the LLC is transparent for US purposes, you will already have paid US tax on your share of the LLC's profits as they arose, potentially years before any distribution and at income tax rates, not dividend rates. When the UK then taxes the distribution as a dividend, the UK is taxing a different event, at a different time, in a different character, from what the US taxed. The mechanics of foreign tax credit relief struggle to bridge that gap, which is where double taxation creeps in. This is a UK-US corridor issue, so it interacts with the wider picture set out in our [[us-uk-tax-guide]].

The disagreement starts with how each country classifies the entity. In the US, an LLC's default federal tax treatment depends on how many members it has. A single-member LLC is a disregarded entity, so its income is reported directly on the owner's return as if the LLC did not exist. A multi-member LLC is treated as a partnership, so profits are allocated to and taxed on the members as they arise. In both defaults the LLC is transparent: the entity is looked through, and the members are taxed.

The US also lets an LLC change that default by filing a check-the-box election on Form 8832 to be taxed as a corporation. That election affects federal tax classification only, not the entity's legal form, and it is subject to timing limits (the effective date can be no more than 75 days before, or up to 12 months after, the date the form is filed) and a 60-month lock before the classification can generally be changed again.

The UK does not follow the US label. HMRC applies its own analysis, looking at the foreign law under which the entity is formed and asking whether it has characteristics closer to a company or to a partnership: does it have separate legal personality, does it issue something like share capital, do the profits belong to the entity or to the members, and so on. Applied to a typical US LLC, HMRC generally concludes the entity is opaque. So the US looks through the LLC to tax the member on profits, while the UK stops at the entity and taxes the member only on distributions. This is the classic reverse hybrid: transparent where it is formed, opaque in the UK.

The double tax is not a rate problem, it is a matching problem. Double tax relief, whether by treaty or by unilateral UK credit, generally requires that the same person is taxed by both countries on the same income. When the US taxes you on your share of LLC profits as they arise, and the UK taxes you on a later distribution treated as a dividend, HMRC's position has often been that these are not the same income in the same person at the same time, so the US tax cannot be credited against the UK dividend charge.

The numbers can be severe. In its own 2026 consultation, HMRC acknowledges that stakeholders have reported effective tax rates in excess of 60%, and the document illustrates a case in excess of 75%, precisely because the same economic profit is taxed twice with no relief. In HMRC's stylised example, a UK member's share of LLC profit is taxed in the US as it arises at US federal income tax rates of up to 37% plus state tax, then when that same profit is distributed the UK taxes it again as a dividend at up to 39.35%, and the US tax already paid does not reduce the UK charge.

Two further wrinkles make it worse. First, character mismatch: US tax on business profits is income tax, while the UK charge is a dividend charge, and credit relief works best when the character lines up. Second, timing mismatch: US tax may arise years before the UK distribution, and credit relief generally cannot be carried across years to meet a later charge. The result is that the very reason people choose an LLC, its US flow-through simplicity, is what causes the UK problem.

Anson v HMRC [2015] UKSC 44 is the case everyone cites, and it is widely misunderstood. Mr Anson was UK resident and a member of a Delaware LLC that was transparent for US tax, so he paid US tax on his share of profits as they arose. HMRC then tried to tax the distributions again in the UK without full credit for the US tax. The Supreme Court found for Mr Anson: on the specific facts, and on the tribunal's finding about Delaware law, the LLC's profits belonged to the members as they arose rather than to the LLC, so Mr Anson was taxed by both countries on the same income and was entitled to treaty relief.

Crucially, the Supreme Court did not rule that all US LLCs are transparent for UK purposes. It decided one case on its findings of fact. HMRC responded that it viewed the decision as fact-specific and would consider claims case by case, while continuing to treat most US LLCs as opaque.

HMRC then hardened its stance. In updated manual guidance published in December 2024 (INTM180050), HMRC states that, based on its understanding of Delaware LLC law, the profits of an LLC will generally belong to the LLC in the first instance, and that members will generally not be treated as entitled to those profits as they arise. In plain terms, HMRC is signalling that it will not accept Anson-style transparent treatment as a general rule, and that taxpayers relying on Anson to claim credit relief may face enquiries. So while Anson technically stands, its practical usefulness as a self-help route has narrowed sharply, and you should not assume it protects your position.

Yes, it can, and this is a separate risk from the member-level mismatch. If a US LLC is centrally managed and controlled from the UK, HMRC can treat the LLC itself as UK tax resident, bringing its worldwide profits within UK corporation tax. The UK domestic test is central management and control, which asks where the real strategic and top-level decisions are actually made, not where the entity is registered. If you run a US LLC from your kitchen table in London, making the key decisions here, the LLC may be UK resident regardless of its Delaware or Wyoming filing.

Even short of full residence, activity in the UK can create a UK permanent establishment for the LLC, so that UK-attributable profits fall into UK corporation tax. Where both the US and the UK claim the entity, the UK-US treaty tie-breaker looks to the place of effective management, but resolving that is fact-heavy and not automatic.

The takeaway is that using a US LLC does not put your affairs offshore for UK purposes. Two things need managing: how you as a member are taxed, and whether the LLC itself has become a UK taxpayer. The second point is easy to trip over for founders and consultants who relocate to the UK and keep running a US LLC. It connects closely to the issues in [[running-a-uk-company-from-abroad]] and [[company-tax-residence-and-cfc-rules]].

There is no single fix, but the sensible options aim to make both countries agree on the entity's character, so relief works. The first question is whether an LLC is even the right vehicle for someone who is, or is about to become, UK resident.

Common approaches include the following, each with trade-offs to work through with an adviser:

• Check-the-box to a corporation: electing on Form 8832 for the LLC to be taxed as a US corporation aligns both countries on opaque treatment, so the UK charge on distributions can more readily be relieved. The cost is US corporate-level tax and added complexity, and it does not suit every business.
• Use a different vehicle: for genuinely transparent treatment on both sides, a US LP or LLP, or a UK entity, may match better than an LLC and avoid the reverse-hybrid problem entirely.
• Manage where the LLC is controlled: keep clear evidence of where key decisions are made to manage the central management and control and permanent establishment risks, especially after a move to the UK.
• Consider FIG timing on arrival: the UK abolished the non-dom remittance basis from 6 April 2025 and replaced it with the four-year foreign income and gains (FIG) regime for qualifying new arrivers (broadly, those UK resident after at least 10 years of non-residence); a new arriver within the window may shelter LLC income for a period, but this is time-limited, forfeits the personal allowance and CGT annual exempt amount, and needs planning (see [[uk-tax-moving-to-the-usa]] for the reverse journey).
• Watch US real property: if the LLC holds US real estate, a disposal by a foreign person is generally subject to FIRPTA withholding at 15% of the amount realised, recoverable only through a US filing, which is a cash-flow and compliance point to plan for.
• Mind exit and expatriation: US citizens giving up citizenship can face the section 877A exit tax if they are covered expatriates (broadly, net worth of $2 million or more, or average annual net US income tax over an inflation-indexed threshold, with a mark-to-market gain exclusion applied). For 2025 the exclusion is $890,000 and the average-tax threshold is $206,000; for 2026 the exclusion is $910,000 and the threshold is $211,000 (indexed annually, so confirm the current IRS figure before relying on it).

The most important near-term development is the reform itself. On 10 June 2026 HMRC published a consultation on the taxation of UK-resident individual members of US LLCs and other reverse hybrids, closing on 31 July 2026. The government's preferred approach is to let eligible reverse hybrids be treated as transparent for UK income tax and capital gains tax, so UK-resident individual members are taxed on the underlying profits (matching the US) and not taxed again on distributions, enabling double tax relief. If enacted, this would largely solve the mismatch for individuals on a prospective basis, but it is not yet law, the detail is not settled, and HMRC has confirmed no equivalent change is proposed for UK-resident corporate members. Until it lands, the trap described above is still live.