Late Filing Penalties Explained: UK Companies House and HMRC Fines

Late filing penalties can turn a small administrative delay into an unnecessary cost for a UK company. For founders, the problem is often not deliberate non-compliance; it is simply losing track of deadlines while dealing with customers, banking, tax, payroll and day-to-day operations.

The important point is that Companies House penalties and HMRC penalties are separate. A company can file its accounts late with Companies House while submitting its Corporation Tax Return on time, or vice versa. Each obligation has its own deadline and penalty regime.

For private limited companies, Companies House currently charges between £150 and £1,500 for late annual accounts, depending on how late they arrive. HMRC can impose separate penalties for a late Company Tax Return, beginning at £200 immediately after the deadline. This guide explains how the penalties work, what happens when a company files late, when penalties can be appealed, and how founders can avoid them.

What Are Late Filing Penalties?

A late filing penalty is a financial charge imposed when a company fails to submit a required document by its legal deadline. For UK companies, two of the most important filing obligations are:

• Annual accounts filed with Companies House
• Company Tax Return filed with HM Revenue & Customs (HMRC)

These should not be confused with one another. A private limited company normally has 9 months after its financial year-end to file its annual accounts with Companies House. Its Corporation Tax is normally due 9 months and 1 day after the end of its Corporation Tax accounting period, while the Company Tax Return is generally due 12 months after the end of that accounting period. This means a company can have several important dates to manage rather than one single "annual filing deadline."

Companies House Late Filing Penalties

Companies House imposes penalties when annual accounts are delivered after the deadline. For a private limited company, the current penalty structure is:

These penalties apply to private companies and LLPs. Public companies have substantially higher penalties. The penalty is generally automatic. Companies House does not need to establish that the director intentionally ignored the deadline.

Example: A company files two months late

Suppose a UK private company has an accounts filing deadline of 31 March. If its accounts reach Companies House on 31 May, they are more than one month late but not more than three months late. The resulting penalty would be £375. If the company waits until October, the penalty could rise to £1,500. The lesson is straightforward: once a filing deadline is missed, delaying further can become expensive very quickly.

Does Companies House Give a Grace Period?

No. There is no general grace period simply because the filing deadline falls on a weekend or bank holiday. Companies House guidance states that accounts must be delivered by the legal deadline, and the relevant date is when acceptable accounts are actually received, rather than simply when the company sends them.

That makes last-minute filing risky. If a company leaves its filing until the final day and encounters a technical problem, missing information or an issue with the accounts, it may still end up with a penalty. For that reason, sensible businesses aim to complete their accounts well before the statutory deadline.

Can Companies House Late Filing Penalties Be Doubled?

Yes. If a company's accounts are late for two consecutive years, the late filing penalty is doubled. This makes repeated lateness particularly costly. For example, a private company that repeatedly files accounts more than six months late could potentially face:

• £1,500 for the first late year
• £3,000 for the second consecutive late year

The practical implication is important for startups: paying one late filing penalty should not become the beginning of a recurring compliance problem.

HMRC Late Filing Penalties for Company Tax Returns

Companies House is not the only organisation that can impose a late filing penalty. A company that fails to submit its Company Tax Return to HMRC on time can face separate penalties. The standard HMRC penalty structure is:

• 1 day late: £200
• 3 months late: Another £200
• 6 months late: HMRC may estimate the Corporation Tax liability and add a penalty of 10% of the unpaid tax
• 12 months late: Another 10% of unpaid tax may apply

If a company files its tax return late three times in succession, the £200 penalties can increase to £1,000 each. This is separate from the Companies House accounts penalty.

A useful distinction for founders
Think of compliance as two separate tracks:Companies House: "Have you filed your company's accounts?"HMRC: "Have you filed your Corporation Tax Return and dealt with the tax due?"
One filing does not automatically satisfy the other.

Late Filing vs Late Payment: What Is the Difference?

This distinction is often overlooked. A company may:

• File its tax return late.
• File its tax return on time but pay its Corporation Tax late.
• File both late.
• File everything on time but pay the wrong amount.

Each situation can have different consequences. For example, the standard deadline for paying Corporation Tax is generally 9 months and 1 day after the end of the Corporation Tax accounting period, whereas the Company Tax Return is normally due 12 months after that accounting period ends. So a business should maintain separate reminders for:

• Accounts filing
• Corporation Tax payment
• Company Tax Return filing
• Confirmation statement
• Payroll and PAYE obligations, where applicable
• VAT returns, where applicable

A calendar containing only the company's year-end date is not enough.

What Happens If Your Company Files Late?

The immediate consequence is usually financial, but the wider implications can be more serious.

1. You receive a financial penalty

For Companies House accounts, the penalty increases according to how late the accounts are.

2. Your compliance record suffers

Repeated late filing can signal poor financial administration to potential lenders, investors, suppliers or other parties reviewing the company's public record.

3. The problem can escalate

Failure to file accounts and other required documents can eventually contribute to Companies House taking steps to strike a company off the register. GOV.UK warns that a company can be struck off if it does not send its accounts or confirmation statement.

4. The company can face separate HMRC consequences

A late Company Tax Return creates a different penalty exposure from late accounts. For a founder managing a UK company from overseas, this separation is particularly important. Incorporating a company does not remove the responsibility to maintain ongoing UK compliance.

Can You Appeal a Late Filing Penalty?

Yes, in appropriate circumstances. Companies House allows companies to appeal a late filing penalty where there was a reasonable excuse for filing late. The appeal should explain the specific circumstances and provide relevant supporting details, including dates and evidence where appropriate. However, "I forgot" or "I did not know about the deadline" should not be treated as a reliable strategy. A stronger appeal is based on a genuine circumstance that prevented the company from filing on time.

What counts as a reasonable excuse?

The precise circumstances matter. Depending on the situation, evidence could be relevant where the delay resulted from events such as:

• Serious illness
• Unexpected technical problems
• Major disruption outside the company's control
• Exceptional circumstances affecting the ability to file

The key is to explain what happened, when it happened, how it prevented filing and what the company did to resolve the problem. An appeal is not a substitute for filing. The company should deal with the overdue accounts as quickly as possible.

What Should You Do If You Have Already Filed Late?

Don't wait for the situation to resolve itself.

• Step 1: File the overdue documents — If accounts are outstanding, get them prepared and delivered as soon as possible. Every additional delay can increase the consequences.
• Step 2: Check HMRC separately — Determine whether the Company Tax Return is also overdue. Don't assume that filing accounts with Companies House means the HMRC obligation has been dealt with.
• Step 3: Check outstanding tax — Establish whether Corporation Tax is due and whether payment is overdue.
• Step 4: Review your compliance calendar — Identify the reason the deadline was missed. Was it poor bookkeeping? Lack of accountant involvement? An overseas director misunderstanding UK deadlines? Missing bank statements? An inactive company being overlooked? A change in accounting reference date? Fixing the cause is more valuable than simply paying the penalty.
• Step 5: Consider an appeal — If there was a genuine reasonable excuse, review whether an appeal is appropriate and gather evidence.

How to Avoid Late Filing Penalties

The best penalty strategy is prevention.

Create a compliance calendar

Record the actual deadlines for:

• Companies House accounts
• Confirmation statement
• Corporation Tax payment
• Company Tax Return
• VAT
• PAYE
• Other industry-specific filings

Use multiple reminders rather than relying on one calendar alert.

Work backwards from the deadline

Don't tell your accountant, "The accounts are due next week." Set internal deadlines such as:

• 90 days before: Bookkeeping substantially complete
• 60 days before: Bank and payment records reconciled
• 30 days before: Draft accounts reviewed
• 14 days before: Final approval
• 7 days before: Filing completed

This gives the business a buffer when something goes wrong.

Keep financial records continuously

One of the biggest causes of filing delays is leaving 12 months of bookkeeping until the deadline approaches. Monthly reconciliation is far easier than reconstructing an entire year's transactions.

Keep Companies House and HMRC obligations separate

A useful compliance spreadsheet can have separate columns for:

This simple structure eliminates much of the confusion.

What About New UK Companies?

New companies have different first-account deadlines. For a private company, the first accounts are generally due 21 months after incorporation, although the precise rules depend on the accounting period and circumstances. Subsequent annual accounts are normally due nine months after the accounting reference date.

That first deadline can create a false sense of security. A founder might think: "My company was only incorporated recently, so I don't have to worry about accounts yet." The better approach is to establish the company's accounting reference date and compliance calendar immediately after incorporation.

This is particularly relevant to non-resident founders using a UK company as an international trading vehicle. Managing the company from another country does not mean its UK filing responsibilities disappear.

Are Late Filing Penalties Changing?

UK company filing requirements are evolving. Companies House has announced that from April 2028, companies will be required to file accounts using commercial software in iXBRL format, with the existing Companies House web and paper accounts filing systems being closed for accounts filings. For founders, this is another reason not to treat statutory filing as an occasional administrative task. Maintaining organised digital accounting records and using suitable accounting software is becoming increasingly important.

Late Filing Penalties: A Practical Founder Checklist

Before your company's next filing deadline, check:

• [ ] Financial records are up to date
• [ ] Business bank accounts are reconciled
• [ ] Sales and expenses have been recorded
• [ ] Director transactions have been reviewed
• [ ] Accounts preparation has started
• [ ] Your Companies House deadline is confirmed
• [ ] Your HMRC Corporation Tax payment deadline is confirmed
• [ ] Your Company Tax Return deadline is confirmed
• [ ] Confirmation statement deadline is recorded separately
• [ ] Your accountant or filing provider has sufficient time
• [ ] Final documents are filed before the deadline
• [ ] Evidence of filing has been retained

For international founders, add another check: make sure someone in the business is explicitly responsible for UK compliance. IncorpUK, as a UK company formation and management platform for global founders, operates in a space where this distinction matters: company formation is only the beginning; maintaining the company's ongoing statutory obligations is equally important.

Frequently Asked Questions

How much is a late Companies House filing penalty?

For a private limited company, the penalty is currently £150 for accounts up to one month late, £375 for more than one to three months late, £750 for more than three to six months late and £1,500 for more than six months late.

What happens if my company files its accounts late?

Companies House normally imposes an automatic financial penalty. If accounts remain outstanding, the company can face more serious compliance consequences, including potential strike-off action.

Can Companies House waive a late filing penalty?

You can appeal a penalty where you have a genuine reasonable excuse. The appeal should explain the circumstances and provide relevant supporting evidence.

Is the Companies House penalty separate from an HMRC penalty?

Yes. Companies House accounts and the HMRC Company Tax Return are separate filing obligations, with separate deadlines and penalty regimes.

How much is an HMRC late Company Tax Return penalty?

The standard penalty is £200 immediately after the filing deadline and another £200 after three months. Further tax-related penalties can apply when a return remains outstanding for longer.

Does a dormant company have to file accounts?

A dormant company can still have Companies House filing obligations. Dormancy does not automatically mean the company can ignore its statutory requirements.

Can I avoid a penalty if my accountant was responsible for filing?

The company and its directors should not assume that using an accountant removes the need to monitor deadlines. Directors remain responsible for ensuring accounts are delivered on time.

Can filing late affect a company's reputation?

Yes. Although a late filing penalty is primarily a compliance issue, repeated late accounts can make a company appear less financially organised to people reviewing its public record.

Conclusion

Late filing penalties are avoidable costs, but avoiding them requires more than knowing that annual accounts exist. For UK companies, the critical point is to treat Companies House filings, HMRC tax returns and tax payments as separate compliance obligations. A private company normally has nine months after its financial year-end to file its annual accounts, while Corporation Tax and the Company Tax Return follow different deadlines.

If you have already missed a deadline, act quickly: file the outstanding documents, check whether HMRC obligations are also overdue, settle outstanding tax where necessary and consider an appeal if you have a genuine reasonable excuse. For founders, especially those running UK companies from abroad, the safest approach is simple: know every deadline, start early, keep records continuously and assign clear responsibility for filing.

A UK company should never be treated as compliant simply because it was successfully incorporated. The real test is whether its obligations continue to be met year after year.