Confirmation Statement (CS01)
Your annual confirmation to Companies House that your company details are correct. Every UK limited company must file a confirmation statement at least once a year.
What is a Confirmation Statement?
A Confirmation Statement (previously called the Annual Return) is a yearly snapshot of your company's information. It confirms to Companies House that the details they hold about your company are accurate and up-to-date.
Unlike the Annual Accounts (which show financial performance), the Confirmation Statement is about your company's structure: who owns it, who runs it, and where it's based. It costs £50 to file online, or £110 for a paper CS01. You pay that fee with the first confirmation statement in each 12-month payment period.
Pre-Filing Checklist
Before filing your CS01, verify all of the following information is correct. AccountsOS automatically checks these against Companies House data.
Registered Office Address
Confirm your registered office address is correct and up to date.
Where official correspondence is sent. Must be in the UK.
Directors
Verify all current directors are listed with correct details.
Names, DOB, nationality, occupation, and service addresses.
Shareholders & Share Capital
Confirm shareholding structure and share classes are accurate.
Who owns what percentage of the company.
Persons with Significant Control (PSC)
Verify PSC register is complete and accurate.
Anyone who owns >25% shares or has significant influence.
SIC Codes
Check your Standard Industrial Classification codes reflect your business activities.
The 5-digit codes that describe what your company does.
SAIL Address
Single Alternative Inspection Location (if applicable).
Where you keep statutory registers if not at registered office.
When to File
You must file your Confirmation Statement at least once every 12 months. The "review period" runs from either:
- The date of incorporation (for first filing)
- The date your last confirmation statement was made up to
Example: If your company was incorporated on 15 March 2024, your first confirmation statement is due by 29 March 2025 (12 months + 14 days).
Penalties for Late Filing
Strike-off: If Companies House doesn't receive your confirmation statement, they can start proceedings to dissolve your company.
How AccountsOS Helps
We make sure you never miss your confirmation statement deadline.
Frequently Asked Questions
Can I file my confirmation statement early?
What if I need to update information before filing?
Is the confirmation statement the same as annual accounts?
What's the difference between CS01 and the old Annual Return?
Identity verification
Directors must verify their identity with Companies House and give their personal code on the confirmation statement. This has been a legal requirement since 18 November 2025. The company cannot file the statement unless every director is verified.
Related Resources
Never Miss a Filing Deadline
Let AccountsOS track your confirmation statement deadline and remind you in advance.