Companies House Late Filing Penalties: The 2026 UK Guide
What Are Companies House Late Filing Penalties?
Late filing penalties were introduced in 1992 to ensure directors meet their legal obligation to file accurate, timely accounts. The penalty is automatic the moment accounts arrive late at Companies House. It applies to all UK registered private companies, public companies, and limited liability partnerships (LLPs). There are no exceptions based on company size, trading status, or whether this is your first filing.Filing Deadlines: How Long Do You Have?
First Accounts (Private Companies and LLPs) If your first accounts cover more than 12 months, you must file within 21 months of the date of incorporation, or 3 months from the accounting reference date, whichever is longer. First Accounts (Public Companies) Within 18 months of the date of incorporation, or 3 months from the accounting reference date, whichever is longer. Subsequent Accounts Private companies and LLPs have 9 months from the end of the accounting reference period. Public companies have 6 months. If you change your accounting reference period, your filing deadline may be reduced. Directors and designated LLP members are personally responsible for ensuring accounts are delivered on time. Delivery means actual receipt at Companies House in the correct format.Companies House Late Filing Penalty Fees 2026
| How Late | Private Company / LLP | Public Company |
| Up to 1 month | £150 | £750 |
| 1 to 3 months | £375 | £1,500 |
| 3 to 6 months | £750 | £3,000 |
| Over 6 months | £1,500 | £7,500 |
What Happens If You Do Not File At All?
Failing to file is a criminal offence under UK law. Directors and LLP designated members can be personally fined in the criminal courts. Non-payment of a late filing penalty leads to enforcement proceedings, with cases heard in the County Court or Sheriff Court. Legal costs may be recovered against the company. Companies House uses the following debt collection agencies: Bluestone Credit Management, BPO, and CCSCollect. If you have difficulty paying, monthly instalment arrangements can be requested by emailing enquiries@companieshouse.gov.uk or calling 0303 1234 500.Can You Appeal a Late Filing Penalty?
Appeals are only successful in genuinely exceptional circumstances. The following reasons alone will not be accepted:- Your company is dormant
- Your accountant was ill or you relied on them
- You were unaware of the filing requirements
- Accounts were lost in the post
- Directors were travelling overseas
- The company has financial difficulties
The ECCTA Digital Filing Reforms: What Is Changing and What Has Been Paused
The Economic Crime and Corporate Transparency Act 2023 (ECCTA) is the most significant reform of Companies House since company registration began in 1844. It is being rolled out in phases. Here is the current status as of April 2026:
What Is Already in Force
- Identity verification is now mandatory for all new directors, PSCs, and LLP members since 18 November 2025. Existing directors and PSCs are in a transition period with a final deadline of November 2026.
- Registered office rules changed in March 2024. Every company must now have a genuine physical UK address. PO boxes are no longer accepted.
- Companies House fees increased from 1 February 2026. Digital incorporation is now £100 and the annual confirmation statement is now £50.
- The joint HMRC and Companies House filing service (CATO) closed on 31 March 2026. From 1 April 2026, company tax returns and annual accounts must be filed separately. Company tax returns must be filed using commercial software.
What Has Been Paused
On 28 January 2026, Companies House updated its guidance to confirm that the accounts filing reforms will not be introduced in April 2027 as previously planned. The regulator stated that the measures are still under review and that a final decision on the timing will be announced in due course.
This means the proposed changes to small company accounts have been paused, so current filing rules remain in place for now. Small companies can still file abridged accounts, and micro-entities can continue using the micro-entity framework.
The government has committed to giving at least 21 months’ notice before any new accounts filing requirements are introduced.
What Is Still Coming
The direction of travel has not changed. Software-only accounts filing is not optional and is not limited to only large or complex companies. Micro-entities, small companies and dormant companies are all within scope. When a new date is confirmed, all UK companies will need to file accounts using commercial iXBRL-tagged software. Paper filing and WebFiling for accounts will close.
The reforms under review include:
- Mandatory iXBRL-tagged software filing for all companies including dormant ones
- Profit and loss accounts required for small companies and micro-entities
- Removal of abridged and filleted accounts options
- Enhanced balance sheet statements regarding audit exemptions
The date is paused. The destination is not.
How to Avoid a Late Filing Penalty Right Now
- Set calendar reminders well ahead of your filing deadline
- Register for email reminders directly from Companies House
- Instruct your accountant early and confirm the deadline in writing
- Use guaranteed delivery methods if filing by post
- File digitally wherever possible to confirm receipt instantly
- Deadlines falling on Sundays or Bank Holidays still apply without exception
- Complete your identity verification before November 2026 to avoid confirmation statement rejections
How DataTracks Helps UK Companies File Compliantly
DataTracks is recognised as HMRC’s first managed tagging provider, with over 450,000 files filed globally. Every iXBRL file is pre-validated before it reaches the HMRC or Companies House gateway, catching errors before they cause rejections or penalties. Submissions are processed in as little as three days.
With the ECCTA digital mandate still coming, and the CATO joint filing service already closed, now is the time to ensure your accounts are iXBRL-ready, compliant, and submitted correctly.
We support:
- Companies House iXBRL tagging
- HMRC CT600 iXBRL submissions
- CbCR XML generation for OECD Action 13 compliance
- BEPS Pillar Two GloBE Information Return filing
Submit once. Get accepted.
Visit www.datatracks.com/uk/ to learn more about how we can help. For enquiries, email contact@datatracks.com or call +44 20 8834 9596.
Frequently Asked Questions
What is the penalty for filing accounts late with Companies House?
Penalties range from £150 for private companies filing up to one month late, up to £1,500 for filings more than six months late. Public companies face higher penalties, up to £7,500.
What happens if I miss the Companies House filing deadline twice in a row?
The penalty is automatically doubled if accounts are filed late in two consecutive financial years.
Why leading Funds trust our platform:
Yes, but only in genuinely exceptional circumstances. Standard reasons such as accountant illness or lack of awareness are not accepted.
Is the April 2027 digital filing mandate still going ahead?
No. Companies House confirmed in January 2026 that the accounts filing reforms originally planned for April 2027 have been paused and are still under review. No new date has been set. Businesses will receive at least 21 months’ notice before any changes take effect.
Has the CATO joint filing service closed?
Yes. The joint HMRC and Companies House filing service closed on 31 March 2026. Company tax returns must now be filed separately using commercial software.
What is iXBRL tagging?
iXBRL (Inline eXtensible Business Reporting Language) is a digital format that makes financial data machine-readable. It is already required for HMRC CT600 filings and will eventually be required for all Companies House filings when the ECCTA reforms are confirmed.
How can DataTracks help?
DataTracks provides managed iXBRL tagging, pre-submission validation, and compliant digital filing for Companies House and HMRC, ensuring your accounts are accepted first time.
