CS01 confirmation statement: what it confirms and when it's due

Who needs it

• Every UK company on the register, including dormant and non-trading companies.
• Companies with nothing to change. The statement confirms the record is still right.
• A company being restored to the register, which must use the paper CS01 with the confirmation date that was due before it was struck off.

What you need before you start

• The company's authentication code and your Companies House account login.
• A Companies House personal code for every current director, which each gets after verifying their identity.
• A registered email address, if the company hasn't given one yet.
• Any changes to SIC codes, the statement of capital, shareholders or the trading status of shares.

How to file CS01

1. 1Check the company's confirmation date and filing deadline on the Companies House register. You can also sign up for email reminders there.
2. 2Make sure every director has verified their identity and has a personal code. Companies House won't accept the statement otherwise.
3. 3File any changes to directors, secretary, PSCs, registered office or registered email address first. These can't be made on the CS01 itself.
4. 4File online, giving each director's personal code, ticking the identity verification statement and confirming that the company's intended future activities are lawful.
5. 5Use the additional information section for changes to SIC codes, share capital, shareholders or the PSC exemption.
6. 6Pay the annual fee if this is your first statement in the current 12-month payment period. Online costs less than paper.

What the confirmation statement does

Companies House describes the CS01 as confirming that the information it holds about your company is up to date. You also state that the company's intended future activities are lawful. If you don't file, Companies House may issue a financial penalty and can strike the company off.

The review period ends 12 months after incorporation for the first statement, and 12 months after the last confirmation date after that. You then have 14 days to file.

Identity verification and the registered email address

Identity verification has been a legal requirement since 18 November 2025. Existing directors give their Companies House personal code in the company's next confirmation statement, one code per director, and a director of several companies does this for each company. You verify for free through GOV.UK One Login, which can include a Post Office visit, or through an Authorised Corporate Service Provider such as an accountant.

PSCs verify too, but they provide their code through a separate Companies House service within their own 14-day window, not on the CS01. A PSC who is also a director gives the code for each role separately.

Part 5 of the paper form collects a registered email address if the company hasn't given one. Companies House uses it to contact you and doesn't publish it. Changing an existing address is a separate process.

Fees and the paper form

The annual fee is paid with the first statement in each 12-month payment period, and any further statements in that period are free. Filing on paper costs more than filing online. Companies House publishes the current amounts on its fees page.

The paper CS01 has optional parts for SIC codes, capital, share trading status, shareholders, the registered email address and directors' identity verification. Print it full size on white A4.

Common mistakes

• Leaving director identity verification to the last day. The statement is rejected until every director's code is in.
• Trying to report a new director, PSC or address on the CS01. Those go on their own filings before you confirm.
• Not filing because nothing changed. A statement is still required every 12 months.
• Filing early without realising it resets the date. Your next review period starts the day after the new confirmation date you choose.
• Confusing the review period with the payment period. The annual fee follows the payment period, which you can't change.