Dormant UK LTD Companies: Why “Doing Nothing” Still Means Filing (and the Penalties for Getting It Wrong)

Opening a UK limited company is fast and cheap, which is exactly why so many international entrepreneurs do it "just in case" — and then never trade through it. The dangerous assumption that follows is that a company with no sales, no invoices and no bank activity has nothing to file. In UK company law, a company that exists must report, whether it earned a single pound or not. "Dormant" is not a holiday from compliance; it is a specific status with its own ongoing obligations.

This is one of the most common and most expensive mistakes non-resident founders make. The good news is that staying compliant while dormant is simple and inexpensive once you understand what is actually required.

"Dormant" Means Two Different Things

The word "dormant" is used by two different bodies, and they do not mean the same thing.

Companies House treats a company as dormant when it has had no "significant accounting transactions" during the financial year — essentially no entries in its accounts other than a few permitted items such as the cost of shares taken by subscribers.

HMRC treats a company as dormant for Corporation Tax when it has stopped trading and has no other income, or when it is a brand-new company that has not started trading yet.

A company can be dormant for one and not the other, so you have to satisfy both sets of rules separately. Neither status is automatic, and neither removes your filing duties.

You Still Have to File With Companies House

A dormant company must still deliver two things to Companies House every year: a confirmation statement and annual accounts. There is no exemption for inactivity.

The confirmation statement confirms that the public record — directors, registered office, shareholders, people with significant control and your SIC code — is still accurate. You must file it at least once every 12 months, within 14 days of the end of your review period, even if absolutely nothing has changed. From 1 February 2026, the digital filing fee increased to £50 (it was £34 previously). Paper filing costs more.

There is also a newer requirement to be aware of. Companies House introduced compulsory identity verification from 18 November 2025. Directors and people with significant control now need a verified identity and a Companies House personal code, which is tied to the confirmation statement process. A dormant company is not exempt from this.

Dormant Accounts Are Still Due Every Year

Even with zero activity, you must file annual accounts. A company that qualifies as dormant can usually file simplified dormant accounts (often a very short balance sheet) rather than full accounts, which keeps the burden light.

The deadline matters: accounts are normally due nine months after your accounting reference date. Missing it triggers an automatic penalty — there is no grace period and no "but we weren’t trading" exception.

Tell HMRC Your Company Is Dormant

HMRC does not automatically know your company is inactive. If you do nothing, HMRC will still expect a Company Tax Return (CT600) and can issue penalties for not filing one.

The fix is to tell HMRC the company is dormant for Corporation Tax — you can do this through HMRC’s online service, by phone, or in writing. Once HMRC accepts the company as dormant, it generally will not ask for a Corporation Tax return for the period it remains dormant. If the company later starts trading, you must tell HMRC within three months of becoming active.

The Penalties for Getting It Wrong

This is where "doing nothing" becomes expensive. Late filing of accounts for a private company carries a fixed penalty that climbs the longer you delay: £150 if up to one month late, £375 for one to three months, £750 for three to six months, and £1,500 for more than six months. These penalties double if you file late in two financial years in a row.

Beyond the fines, the consequences escalate. Failing to file accounts or a confirmation statement is a criminal offence, and directors can be prosecuted personally. Persistent non-filing leads Companies House to strike the company off the register — dissolving it entirely — and any money left in the company bank account can pass to the Crown. Disqualification of directors is also possible. None of this requires the company to have earned anything; the obligations exist simply because the company exists.

A Warning for Non-Resident Founders

The pattern we see most often is a founder who incorporates a UK LTD to test an idea, gets busy elsewhere, and forgets the company exists — until penalty letters arrive at the registered office (which they may never see if mail is not forwarded abroad). If you have decided you will not use the company, the clean solution is usually to keep it compliant while dormant or to close it down properly through voluntary strike-off, not to simply abandon it. Walking away quietly is what generates the penalties, the strike-off, and the potential disqualification.

Have Questions About Your Own Situation?

Every company’s position is a little different, and the rules around dormancy, accounts and Corporation Tax can be easy to get wrong from abroad. If you would like to talk yours through with the MP Partner experts team — no pressure, no hard sell, just clear answers — we are happy to help.

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