LLC vs Ltd: US LLC or UK Limited Company — Which Should You Form?

An LLC and a Ltd are not two words for the same thing. A US Limited Liability Company and a UK Limited Company both give you limited liability and a separate legal identity, but they are taxed on completely different principles — and for a UK resident, that difference can be expensive.

This guide, from the UpToNova Team, compares the two honestly, including the case where a US LLC is the wrong answer for you.

Last updated: August 2026.

The short version

• UK Ltd — a company for UK tax purposes. It pays UK corporation tax on its profits; you pay personal tax on salary or dividends you take out. Registered at Companies House, and your details are public.
• US LLC — by default not a taxable entity in the US at all. Profits pass through to the owners, who are taxed personally. For a non-US owner with no US-source income, that often means no US federal income tax — but always a US filing obligation.
• The catch for UK residents: HMRC does not necessarily treat a US LLC as transparent in the way the IRS does. That mismatch is the single most important thing on this page.

Liability and legal structure

Broadly equivalent. Both separate your personal assets from business debts, provided you keep finances separate and do not give personal guarantees. Neither protects you from your own negligence or fraud.

Structurally, a Ltd has shares, shareholders and directors, with a fairly prescriptive framework in the Companies Act. An LLC has membership interests and members, and an operating agreement that can be drafted with far more freedom. If you want an unusual profit-split or governance arrangement, the LLC is more flexible.

Tax — where they genuinely diverge

UK Ltd

The company pays UK corporation tax on its profits. You then pay personal tax on what you extract as salary or dividends. Two layers, but predictable, and the whole system is built for UK residents.

US LLC

By default the IRS treats a single-member LLC as a disregarded entity: it does not pay federal income tax itself. Profits are attributed to the owner. For a non-US owner whose business has no Effectively Connected Income and no US-source income, US federal income tax is frequently nil.

That is where people stop reading, and it is where the trouble starts.

The HMRC problem UK residents must understand

The IRS treating your LLC as transparent does not oblige HMRC to do the same. HMRC has generally regarded US LLCs as opaque — that is, as companies — meaning distributions to you can be taxed as dividends rather than as your own trading profits.

The consequence is a mismatch: the US may attribute the profit to you personally while the UK treats the payment to you as a separate dividend, and relief for tax paid in one country against the other may not line up cleanly. The Anson v HMRC Supreme Court decision in 2015 found a particular Delaware LLC transparent on its specific facts, but HMRC did not treat it as changing its general approach.

If you are UK-resident, take advice from a UK accountant who has actually handled US LLCs before you form one. This is not a formality. For many UK residents a UK Ltd is simply the better structure, and we would rather say so than sell you a company that creates a tax problem.

Where a US LLC clearly wins

The LLC is usually the right answer when the driver is market and payment access rather than tax:

• You need Stripe, PayPal or US payment rails that are not available in your country. This is the single most common reason our clients form one.
• You sell mainly to US customers and want a US legal entity for credibility and contracting.
• You are not UK-resident — the HMRC mismatch above does not apply to you, and the LLC's simplicity is a genuine advantage.
• You want privacy. Wyoming and Delaware do not publish LLC members. Companies House publishes UK directors and persons of significant control.
• You want a flexible operating agreement rather than the Companies Act framework.

Where a UK Ltd wins

• You are UK-resident and trade mainly in the UK. No cross-border mismatch, no US filings, and your accountant already knows what to do.
• You want UK reliefs such as R&D credits or EIS/SEIS for investors — none of which a US LLC can access.
• You want UK banking without friction. A UK Ltd opens a UK business account far more easily than a foreign-owned US LLC does.
• Cost. Incorporating at Companies House costs a small fee versus a US LLC's formation cost, registered agent and annual US filings.

Side by side

	US LLC (Wyoming/Delaware)	UK Ltd
Limited liability	Yes	Yes
Default tax treatment	Pass-through (US)	Corporation tax on profits
Owners published	No	Yes — Companies House
Annual filing	State report + Form 5472 + pro-forma 1120	Confirmation statement + accounts
Access to Stripe/US rails	Yes	Yes, if UK-supported
UK reliefs (R&D, SEIS)	No	Yes
Best for UK residents	Usually not — check with an adviser	Usually yes
Best for non-residents blocked from Stripe	Yes	No

The US filing obligation, whoever you are

If you do form a US LLC as a foreign owner, one duty is non-negotiable: a foreign-owned single-member LLC must file Form 5472 with a pro-forma 1120 every year, even with zero income and zero tax due. The penalty for missing it starts at $25,000. Read the Form 5472 guide.

Whether you owe any actual US tax is a separate question, covered in do foreign-owned US LLCs pay US tax.

Frequently Asked Questions

Is an LLC the same as a Ltd?
No. Both give limited liability, but a Ltd is a company for tax purposes while a US LLC is pass-through by default. The tax consequences differ substantially.

Can a UK resident own a US LLC?
Yes, with no restriction on ownership. The question is not whether you can, but whether it is sensible for your tax position — take UK advice first.

Can I have both?
Yes, and some businesses do — a UK Ltd for UK trade and a US LLC for US-facing sales. It adds accounting cost and complexity, so it should be a deliberate decision.

Which is cheaper?
A UK Ltd, in almost every case, once US registered agent fees and annual US filings are counted.

Does a US LLC help me avoid UK tax?
No. If you are UK-resident, your worldwide income is generally within scope of UK tax. Anyone selling a US LLC as a UK tax-avoidance tool is misleading you.

Which one is right for you?

If you are UK-resident, trading in the UK, and have no payment-access problem — form a UK Ltd and speak to a UK accountant. That is the honest answer, and it costs you nothing.

If you are outside the UK, or you specifically need US payment rails and a US legal presence, a US LLC is what you want. UpToNova forms Wyoming and Delaware LLCs for $200 flat plus the state fee, including the EIN without an SSN, a registered agent, and the compliance calendar that keeps the Form 5472 deadline from surprising you.

Start your US LLC, or compare Wyoming vs Delaware first.