When are private company accounts due at Companies House?

For a private limited company, first accounts are generally due 21 months after incorporation. Subsequent annual accounts are generally due 9 months after the financial year end.

When is Corporation Tax due?

Corporation Tax is usually payable 9 months and 1 day after the end of the accounting period, although large companies may pay by quarterly instalments.

UK Company Filing Deadline Calculator

Q: When is a CT600 Company Tax Return due?

A Company Tax Return is normally due 12 months after the end of the accounting period it covers.

Q: When is a confirmation statement due?

A confirmation statement must be filed at least once every 12 months. The review period normally ends 12 months after incorporation or the previous confirmation statement date, and the filing deadline is 14 days after the end of the review period.

Estimate key filing and payment dates for a UK private limited company, including Companies House accounts, Corporation Tax payment, CT600 filing and confirmation statement deadlines.

Important: This calculator provides general deadline guidance for UK private limited companies. It does not cover every special case, including changed accounting reference dates, public companies, overseas companies, large company quarterly instalment payments, extensions, penalties or HMRC-specific accounting period issues.

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What this covers

Main UK company deadlines

For a UK private limited company, the most common annual compliance dates are the Companies House accounts filing deadline, Corporation Tax payment deadline, Company Tax Return deadline and confirmation statement deadline.

AccountsFirst accounts are generally due 21 months after incorporation. Later annual accounts are generally due 9 months after the financial year end.
Tax paymentCorporation Tax is usually due 9 months and 1 day after the accounting period ends, subject to rules for larger companies.
CT600The Company Tax Return is normally due 12 months after the end of the accounting period it covers.
ConfirmationThe confirmation statement is normally due 14 days after the end of the 12-month review period.

Tip: The directors remain responsible for filing on time even where an accountant or adviser prepares the submission. Use this tool for planning and confirm dates against the Companies House register and HMRC records before filing.

FAQs

UK company filing deadline frequently asked questions

Answers to common questions on company accounts, Corporation Tax, CT600 and confirmation statement deadlines.

When are first accounts due at Companies House?

For a private limited company, first accounts are generally due 21 months after the date of incorporation. Special cases can arise where the accounting reference date has been changed.

When are later annual accounts due?

For a private limited company, annual accounts are generally due 9 months after the company financial year end.

When is Corporation Tax payment due?

Corporation Tax is usually payable 9 months and 1 day after the accounting period ends. Large companies may instead have quarterly instalment payment obligations.

When is the CT600 due?

The Company Tax Return is normally due 12 months after the end of the accounting period it covers.

When is a confirmation statement due?

A company must file at least one confirmation statement every 12 months. The review period normally ends 12 months after incorporation or the previous confirmation statement date, and the filing deadline is 14 days after the end of that review period.

Can Companies House accounts filing deadlines be extended?

Companies House may allow an extension in certain circumstances, but this should be applied for before the original filing deadline. This calculator assumes no extension has been granted.