Companies House confirmation statement (CS01)
The annual return every UK company files with Companies House confirming that the data on the public register — directors, PSCs, registered office, share capital, SIC codes — is up to date.
At a glance
Compliance- Why it matters
- UK statutory
- Related
- 3 terms
- Walkthroughs
- 3 guides
- Watch out
- Common misconception below
Plain English. UK spelling. No marketing filler.
Why this matters
Filing the confirmation statement on time is a legal duty for every UK limited company and LLP. The deadline is one year minus a day from the date of incorporation (or last filed statement), with a 14-day grace period. Miss it and Companies House can strike the company off the register — and the directors stay personally liable for the company’s debts during strike-off proceedings.
How YionStack handles it
The YionStack accounting module assembles the confirmation statement from the live business data — directors, PSC list, registered office, share capital, SIC codes. The Companies House integration verifies what the public register currently holds and highlights any differences for review. Once approved, the CS01 submits directly to Companies House through the WebFiling connection. The Companies House submission reference attaches to the return record and the next-due-date updates on the business profile so the reminder fires automatically twelve months out.
Common misconception
It is not the same as the company accounts
The confirmation statement is a snapshot of who and what — directors, PSCs, address, SIC codes. The annual accounts are a separate filing about the company’s financial position. Both are due to Companies House (and the accounts are also due to HMRC), but on different dates and through different filings.
The whole UK Business Operating System.
VAT, PAYE, Companies House, CIS, payroll, CRM and the AI that watches them — in one place built for UK businesses.