What is a confirmation statement (CS01)?
By DormantFile · Updated 28 March 2026
A confirmation statement (CS01) is a filing with Companies House that confirms your company's details are up to date. It replaced the old Annual Return in June 2016.
What it confirms
The confirmation statement checks that the following details on the Companies House register are correct:
- Registered office address
- Directors and secretaries
- Shareholders and share capital
- SIC (industry) codes
- People with significant control (PSC)
If anything has changed, you update it as part of the filing. If nothing has changed, you confirm the existing details.
How it differs from annual accounts
The confirmation statement and annual accounts are separate filings with different deadlines:
- Annual accounts: report the company's financial position. Due 9 months after your accounting reference date.
- Confirmation statement: confirms company details are correct. Due at least once every 12 months from incorporation (or the last CS01).
You need to file both, even if your company is dormant. If the company is registered for Corporation Tax, a CT600 to HMRC is also required.
Filing fee
The confirmation statement costs £50 (online) or £110 (paper), payable to Companies House. You pay it once per 12-month payment period, with the first statement you file in that period — any further statements in the same period are free.
What we handle
We handle dormant accounts (to Companies House) and nil CT600 returns (to HMRC) — see our pricing. You file the confirmation statement directly with Companies House via their WebFiling service.
Read the full guide: First year filing for a new dormant company