UK Company Compliance Calendar

Key filing deadlines and penalties every UK limited company director needs to know. Missing deadlines can result in automatic fines and, in serious cases, company strike-off.

Confirmation Statement (CS01)

Confirms that company information on the public register is up to date. Must be filed even if nothing has changed.

When: Within 14 days of the review period end date (12 months from incorporation, then annually)

Penalty: Company may be struck off the register

Annual Accounts

Financial statements filed with Companies House. Micro-entities and small companies can file abbreviated accounts.

When: 9 months after the accounting reference date (first accounts: 21 months from incorporation)

Penalty: Automatic penalties from £150 to £1,500 depending on how late

Corporation Tax Return (CT600)

Filed with HMRC (not Companies House). Reports company profits and calculates tax due.

When: 12 months after the end of the accounting period

Penalty: £100 immediately, rising to £200 after 3 months. 10% surcharge after 6 months.

Corporation Tax Payment

Tax must be paid to HMRC before the return is due. Most small companies pay in a single instalment.

When: 9 months and 1 day after the end of the accounting period

Penalty: Interest charged on late payment from the due date

VAT Returns (if registered)

Required if annual taxable turnover exceeds £90,000. Returns can be filed monthly, quarterly, or annually.

When: Quarterly, 1 month and 7 days after the end of the VAT period

Penalty: Default surcharge system, escalating with repeated late filing

PAYE/RTI Submissions (if employing staff)

Full Payment Submission (FPS) must be sent to HMRC each time employees are paid.

When: On or before each pay date

Penalty: £100 per month per 50 employees for late FPS submissions

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