Limited company filing deadlines: accounts, tax and statements

Build a calendar with separate obligations

A company’s accounts report financial information; a confirmation statement checks register information; a Company Tax Return calculates the tax position. Completing one does not complete the others. An inactive company can still have Companies House obligations.

Assign an owner for each filing, retain submission receipts and schedule preparation well before the statutory deadline. A reminder service helps, but directors remain responsible if an agent misses a date.

The usual deadlines for a private company

These are the normal rules for a straightforward private company. Changed year ends, extensions, first-period length and tax circumstances can alter the detail.

Why the first year can be confusing

A company’s first financial period commonly runs from incorporation to the end of the month of its first anniversary, so it can exceed twelve months. A Corporation Tax accounting period cannot be longer than twelve months. A long first accounts period can therefore need two tax returns.

Ask your accountant to confirm both the Companies House accounting reference date and HMRC accounting periods. Do not copy a single anniversary date across every deadline. If you shorten or extend the year end, check the revised filing dates before relying on the old calendar.

Confirmation statements need review, not a blind click

Review the required company details, such as business activity, capital, shareholders and PSC information. Some changes must be reported separately and cannot simply wait until the statement. You must make the required lawful-purpose statement and meet applicable identity verification requirements.

The current digital fee is £50 for the first confirmation statement in a twelve-month payment period. Filing more often can be appropriate after changes, but review periods and fee periods work differently. Read the official guidance before deciding when to submit.

What to do if a deadline is at risk

Contact your accountant early and investigate any permitted extension before the deadline. An extension is not automatic and not every filing has the same process. Missing accounts deadlines can trigger penalties, and persistent non-compliance can put the company at risk of strike-off.

If a filing has been rejected, it may not count as delivered. Check acknowledgement and acceptance rather than assuming clicking submit is enough. Pay attention to official mail, authentication access and verification issues while there is still time to resolve them.

Worth knowing: Your calendar should contain preparation dates and confirmation checks as well as final legal deadlines.

Worked first-year timeline: one set of accounts, potentially two tax returns

Illustrative company: incorporated and active from 13 October 2026, first financial year end 31 October 2027. As first accounts exceed 12 months, the ordinary Companies House deadline is 13 July 2028: 21 months from incorporation. Official guidance uses the later of 21 months from incorporation and three months from the accounting reference date. First accounts covering 12 months or less instead use the normal nine-month filing allowance.

Corporation Tax is separate. A first tax period ending 12 October 2027 normally has payment due 13 July 2028 and a return due 12 October 2028. A second short period ending 31 October 2027 normally has payment due 1 August 2028 and a return due 31 October 2028. These dates assume ordinary payment rules and the actual business start shown above.

The confirmation statement is different again: the default first review period ends 12 October 2027, followed by 14 days to file, giving 26 October 2027. Filing an early statement can change the future review timetable. Always use the actual review end recorded for the company rather than recycling the incorporation anniversary indefinitely.

Run a filing process that survives changed year ends and rejected submissions

For normal annual accounts, Companies House applies a month-end rule where the accounting reference date is the last day of a month. For example, accounts ending 30 April ordinarily have a 31 January deadline, not 30 January. Tax payment calculations use their own rules; do not reuse an accounts deadline as a universal payment deadline.

Year-end changes, extensions and special circumstances can change the result. When shortening an accounting period, official guidance uses the longer of nine months from the new reference date and three months from receipt of the change notice for a private company. The calendar cannot infer that notice date or an approved extension. Enter the official date as an override.

Assign a preparer and an approver for each task. Set an internal target well before the statutory deadline so missing invoices, identity-code issues and rejected accounts can be fixed. Keep an acceptance receipt, not just proof that someone pressed submit. Filing accounts at Companies House does not mean a Company Tax Return has been delivered to HMRC or tax has been paid.

Worth knowing: Use the interactive calendar for planning, then verify every date against the company register and HMRC account.

Dormant vs. Active: A Lighter, but Not Zero, Filing Burden

A common misconception is that a 'dormant' company has no filing obligations. This is incorrect and can lead to penalties and the company being struck off. It's crucial to understand that 'dormant' has slightly different meanings for Companies House and HMRC. For Companies House, a company is dormant if it has had no 'significant accounting transactions' during the financial year. These are transactions that must be entered into the company's accounting records, such as sales or purchases. Specific allowable transactions include the initial subscription for shares and paying Companies House fees.

For HMRC, a company is dormant for Corporation Tax if it has not been active, meaning it isn't trading, receiving income, or employing anyone. You must inform HMRC that your company is dormant. If HMRC agrees your company is dormant, it will send a letter confirming you do not need to pay Corporation Tax or file a Company Tax Return for that period. However, this HMRC 'dormancy' does not absolve you of your Companies House duties. You must still file a Confirmation Statement and annual accounts every year, even if they are the simplified 'dormant accounts'.

Filing dormant accounts is a much simpler process. Using the Companies House online service, a director can complete the submission in minutes by confirming the company had no significant transactions. This avoids the cost and complexity of preparing full statutory accounts. However, if the company undertakes any trading activity, even a single small sale, it loses its dormant status for that period and must file full accounts and a Corporation Tax return. The decision to remain dormant or begin trading has significant implications for your filing requirements and administrative workload.

• It has not engaged in any business activity or generated any income.
• It has had no 'significant accounting transactions' as defined by the Companies Act 2006.
• Allowable transactions that do not break dormancy include paying for shares at incorporation, fees paid to Companies House (like the Confirmation Statement fee), and penalties for late filing.
• Receiving interest or making a small sale would count as a significant transaction, breaking the company's dormant status.

Worth knowing: A dormant company's administrative burden is significantly lower, but the legal requirement to file annual accounts and a confirmation statement with Companies House remains.

The Costs of Compliance vs. the High Price of Penalties

Directors should view compliance costs as a necessary investment to protect the company and themselves. Proactive spending on accounting software, professional advice, and timely filing fees is minimal compared to the punitive costs of failure. As of October 2026, key mandatory fees include the £50 digital Confirmation Statement fee and the Information Commissioner's Office (ICO) data protection fee, which starts at £52 for most small businesses. Beyond these, costs for an accountant to prepare and file year-end accounts and a tax return can range from a few hundred to several thousand pounds, depending on the complexity of the business.

These predictable costs stand in stark contrast to the automatic, non-negotiable penalties for late filing. Companies House imposes a rigid penalty structure for accounts filed even one day late, which doubles if the company was also late in the previous year. For Corporation Tax, HMRC issues penalties for late filing of the CT600 return, starting at £100, and charges daily interest on any unpaid tax. Unlike some other tax issues, there is very little scope for negotiation on late filing penalties for accounts; the only excuse is a rare, unforeseen event that physically prevented the submission, and proof is required.

Worth knowing: The chart shows the standard Companies House penalties as at October 2026, which automatically apply and double if accounts are filed late for two consecutive years.

Beyond Fines: A Director's Personal Liability for Filing Failures

While late filing penalties are levied against the company, it is the directors who are legally responsible for ensuring those filings are made on time. Persistent failure to meet these obligations can lead to severe personal consequences that go far beyond corporate fines. Under the Companies Act 2006, failure to file accounts or a confirmation statement is a criminal offence. The Registrar of Companies can, and does, pursue prosecution against the directors of companies that are serially non-compliant. A successful prosecution results in a criminal record and a potentially unlimited fine for the director personally.

The introduction of mandatory identity verification for all new directors and Persons with Significant Control (PSCs) from 18 November 2025 has significantly increased personal accountability. This system makes it easier for authorities like Companies House and the Insolvency Service to trace and take action against delinquent directors. A director's filing history is public and can impact their ability to secure credit, run other companies, or even hold certain jobs. In the event of company insolvency, a history of non-compliance can be used as evidence of unfit conduct, potentially leading to director disqualification for a period of up to 15 years.

• A criminal record and a personal fine upon summary conviction in a magistrates' court.
• Disqualification from acting as a company director or being involved in the management of a company for 2 to 15 years.
• Damage to professional reputation, making it difficult to secure future directorships, loans, or investment.
• In the event of insolvency, a history of filing failures can support a case for wrongful trading, potentially leading to personal liability for the company's debts.
• Prosecution by Companies House, which is a matter of public record and can be highly damaging.

Worth knowing: Directors are personally and legally responsible for company filings, with failures potentially leading to criminal prosecution and disqualification, a risk amplified by new identity verification rules.

Procedure: How to Change Your Accounting Year End

A company's first accounting period is automatically set upon incorporation, ending on the last day of the month one year after its formation. This date is known as the Accounting Reference Date (ARD). While this default works for many, there are valid strategic reasons to change it. A common reason is to align the company's financial year with the UK tax year (ending 31 March or 5 April) to simplify tax calculations. Other reasons include aligning with a parent or subsidiary company for consolidated accounts, or shifting the year-end away from a period of intense business activity to allow more time for accounts preparation.

The rules for changing the ARD are strict. You can shorten an accounting period as many times as you wish and by any number of months. However, you can generally only lengthen an accounting period once every five years, with some specific exceptions (e.g., aligning with a subsidiary). An extension cannot make the accounting period longer than 18 months. The decision to change your ARD must be made strategically, as it resets the deadlines for filing both your accounts with Companies House and your Company Tax Return with HMRC, which can cause confusion if not managed carefully.

1. 1

   First, decide on your new desired accounting year end date, carefully checking that the change complies with the rules on extending and shortening.

2. 2

   Next, you must formally notify Companies House by completing and submitting form AA01 'Change of accounting reference date'. This can be done online via the WebFiling service or by post.

3. 3

   Critically, you must submit the form AA01 before the filing deadline of the accounting period you are changing. Filing it after the deadline has passed will result in the change being rejected.

4. 4

   Once Companies House accepts the change, you will receive a confirmation letter. You must then update your internal records and calendars to reflect the new accounts filing deadline.

5. 5

   Finally, ensure you inform your accountant immediately and update your accounting software to correctly reflect the new, shortened or extended, financial period for accurate bookkeeping and reporting.

Worth knowing: To change your year end, you must file form AA01 with Companies House before the original deadline, remembering you can shorten freely but can only extend beyond 12 months once every five years.

Beyond Annual Returns: Managing PAYE, VAT, and CIS Filings

While annual accounts and tax returns are major milestones, many businesses face a more frequent cycle of operational filings with HMRC. These are triggered by specific activities like employing staff, exceeding turnover thresholds, or working in certain industries. The three most common are Pay As You Earn (PAYE) for employees, Value Added Tax (VAT), and the Construction Industry Scheme (CIS). Each has its own registration trigger, filing frequency, and payment deadlines. Unlike annual filings where there is a long lead time, these operational returns are often due monthly or quarterly, requiring a robust bookkeeping process to ensure accuracy and timeliness.

Managing these high-frequency filings is critical for cash flow and compliance. PAYE, submitted via Real Time Information (RTI), requires a report to be sent to HMRC on or before every payday. VAT returns are typically filed quarterly, requiring payment of the VAT owed within one month and seven days of the quarter's end. For construction businesses, monthly CIS returns are needed to declare payments made to subcontractors. Failure to manage these correctly leads to immediate and escalating penalties from HMRC, as well as significant interest charges on late payments. All these systems are digital, requiring compatible software for submissions.

Worth knowing: Operational tax filings like PAYE, VAT, and CIS often have monthly or quarterly deadlines, demanding disciplined bookkeeping and cash flow management to avoid immediate penalties.

Edge Case: When UK Companies Must Engage with the Register of Overseas Entities

The Register of Overseas Entities (ROE) was established to increase transparency about the beneficial owners of overseas entities that own UK land or property. While the primary obligation falls on the overseas entity itself, UK companies can be indirectly affected. A UK company must check if any of its registrable beneficial owners are corporate entities governed by the law of a country outside the UK. If such an overseas entity holds more than 25% of the UK company's shares or voting rights, it may need to register on the ROE if it also owns UK property, creating a due diligence duty for the UK company's directors.

The practical implication for a UK company's directors is to be aware of this regime when recording their Persons with Significant Control (PSC). If a corporate PSC is an overseas entity, the directors should make enquiries about its UK property holdings and its status on the ROE. The information required for the ROE is more detailed than for a UK Confirmation Statement, delving into trusts and ultimate beneficial owners. The annual 'Update Statement' for the ROE carries a significant fee (£234 as of October 2026) and failure to comply prevents the entity from transacting with its UK property and constitutes a criminal offence for its officers.

Worth knowing: UK companies with overseas corporate owners must be aware of the Register of Overseas Entities, as their owners' compliance status can indirectly affect the UK company's governance and due diligence.

Common questions

Official sources & further reading

This guide draws on the official guidance below. Rules, fees and individual circumstances can change; check the relevant source before acting.

• GOV.UK: Accounts and tax return deadlines
• GOV.UK: Confirmation statement
• GOV.UK: Corporation Tax payment
• GOV.UK: Accounting reference date
• Companies House: Detailed accounts deadline rules

General UK information, primarily for private companies limited by shares. This is not personalised legal, tax or financial advice. An accountant or solicitor can help apply the rules to your situation.