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How to file form CS01 — the Companies House confirmation statement

Form CS01 is Companies House's confirmation statement — the annual filing that confirms the information already on the public register (officers, people with significant control, registered office, share capital) is still correct, due within 14 days of the confirmation date every 12 months.

It is not a form for changing any of that information; a company that has had a director die or resign still needs the separate officer-change filing done first.

This walkthrough covers what the form is and isn't for, the lawful-purpose declaration, who's allowed to sign it, the fee, and why it matters specifically when an executor has stepped in to run a deceased relative's company.

✓ Official source checked 23 August 2026 · GOV.UK last revised this form 1 February 2026CS01 on GOV.UK
Free
United KingdomInformational, not legal or financial adviceOfficial source: GOV.UK
Official form · always current

This is the same official CS01 file Companies House publishes on GOV.UK — the link below fetches the current version live from GOV.UK the moment you click it, so it can never go out of date.

Current version: February 2026 · confirmed on GOV.UK 23 August 2026

This walkthrough takes CS01 field by field, in plain English. It's a short, mostly tick-box form — the risk isn't getting a box wrong, it's assuming the confirmation statement covers changes it doesn't: officers, PSC, registered office and SAIL address all need their own separate filing.

The thing most people get wrong
Filing CS01 does not update officers, PSC, registered office, or SAIL address — those changes need their own separate forms, filed before or alongside the confirmation statement.

An executor who files only the CS01 after a director has died or resigned leaves a dead person listed as an active officer on the public register — file the officer change first (or in the same batch), not the confirmation statement alone.
The form, in summary
Valoren
CS013 pages6 fields guided
With Valoren10 minutes
, once the company record is in one place
Without Valoren15–30 minutes
if nothing has changed since the last statement; longer if a director needs to complete identity verification for the first time, or if an officer/PSC/address change needs filing separately first
Deadline
14 daysfrom the
confirmation date
Who Files
A directoror company
secretary
£
Fee
£50online — £110 by post
(once per year)
Filed with Companies House
Draws from your Estate File
the records this form is built from
PersonalBusiness Interests & Directorships·Legal Instruments·Digital Access Map·Financial Accounts·Asset Inventory·Income & Outgoings·Civil Dossier·Policy Index·Medical Abstract·Property Folio·Succession Plan·Digital Legacy Registry·Funeral & Committal Wishes·Dependent Care & Handoff·Personal Record·RegistryPeople, Authority & Contacts·Master Registry·Renewal Register·Designated Places·Kinship & Succession Map·SecureAccess Controls·Recovery Routes·Custody & Contingency·EventsDeath & Estate Activation·Incapacity & Medical Proxy·Absence & Continuity Cover·Access Loss & Identity Recovery·Legal Dispute & Evidence Protocol·Theft & Asset Compromise·Property Damage & Incident Response·Relocation & Address Update Protocol·Separation & Custody Documentation·Business Interruption & Continuity·PersonalBusiness Interests & Directorships·Legal Instruments·Digital Access Map·Financial Accounts·Asset Inventory·Income & Outgoings·Civil Dossier·Policy Index·Medical Abstract·Property Folio·Succession Plan·Digital Legacy Registry·Funeral & Committal Wishes·Dependent Care & Handoff·Personal Record·RegistryPeople, Authority & Contacts·Master Registry·Renewal Register·Designated Places·Kinship & Succession Map·SecureAccess Controls·Recovery Routes·Custody & Contingency·EventsDeath & Estate Activation·Incapacity & Medical Proxy·Absence & Continuity Cover·Access Loss & Identity Recovery·Legal Dispute & Evidence Protocol·Theft & Asset Compromise·Property Damage & Incident Response·Relocation & Address Update Protocol·Separation & Custody Documentation·Business Interruption & Continuity·
Legal basisStatute

CS01 is the annual compliance filing every UK company must make under s.853A Companies Act 2006 — a snapshot confirming the information Companies House already holds (officers, PSC, registered office, SAIL address, share capital, SIC codes) is still correct as at the confirmation date, not a form for changing any of it.

Every company, including a dormant or non-trading one, must deliver at least one confirmation statement every 12 months. The 12-month 'confirmation period' runs from incorporation, or from the previous confirmation date — filing early resets the next one.

Since the Economic Crime and Corporate Transparency Act 2023 identity-verification rollout, the form also requires director identity-verification details (optional Part 6) as new information comes up — a new director who hasn't yet verified their identity with Companies House needs to do that first.

Section by section

The form, section by section.

Before you start, you’ll need:
  • Who Files — A company director (most common), the company secretary, a 'person authorised' under ss.270/274 CA2006, or — for specific entity types — a Charity Commission receiver and manager, CIC manager, or judicial factor. In the estate context this walkthrough serves: an executor or administrator who has taken over as a director of a small private company the deceased ran (a sole-director/shareholder company is common among small business owners), or who has been newly appointed as a director to keep the company running or wind it down in an orderly way, needs to keep the confirmation statement current so the company isn't struck off while the estate is still being administered.
  • 3 pages · 6 fields guided
  • Draws from your Estate File — Business Interests & Directorships, Legal Instruments, People, Authority & Contacts
Section 1

What CS01 is — and what it isn't

CS01 is a genuinely short form: three printed pages, plus up to six optional 'additional information' Parts, each its own separate PDF, only needed if something has actually changed.

What this form confirms

That the information Companies House already holds on the public register — officers, people with significant control (PSC), registered office and SAIL address, share capital, SIC codes — is still correct as at the confirmation date. Directors also confirm their own identity verification as part of this filing.

What it cannot do

CS01 cannot be used to change any officer, PSC, registered office or SAIL address detail. Those changes need their own separate forms, filed before the confirmation statement or alongside it — never as a substitute for it.

The six optional Parts

Part 1 (SIC codes/principal activities), Part 2 (statement of capital), Part 3 (trading status of shares/PSC exemption), Part 4 (shareholder information), Part 5 (registered email address — only for companies incorporated before 4 March 2024 filing their FIRST post-4-March-2024 statement; updating an already-registered email uses form EM01 instead), and Part 6 (director's identity verification). Attach only the Part that matches what's actually changed.

Who can sign it

A director, the company secretary, a person authorised under sections 270 or 274 of the Companies Act 2006, or — for a charity, CIC, or estate under judicial factory — the relevant receiver, manager or factor. A UK Societas filer deletes 'director' and states which organ of the Societas the signatory belongs to instead.

CS01 is a genuinely short form: three printed pages, plus up to six optional 'additional information' Parts, each its own separate PDF, only needed if something has actually changed.

Companies House · CS01
Section 2

The three boxes on the main form

Once you know CS01 is confirm-only, the main form itself is short: company identity, a date, and a single tick.

Box 1 — company details

Company number and company name in full, exactly as they appear on the public register.

Box 2 — confirmation date

The date the confirmation/review period ends. This is the date the 14-day deadline runs from — not the date you happen to be filling the form in.

Box 3 — lawful purpose

A single tick-box declaration: 'The company confirms that the intended future activities of the company are lawful.' No supporting text or explanation is required.

Box 4 — the declaration and signature

The operative legal statement — that all information required under s.853A(1)(a) has been, or is being, delivered with this statement — followed by a printed name (no signature required) and the signatory's capacity.

Once you know CS01 is confirm-only, the main form itself is short: company identity, a date, and a single tick.

Companies House · CS01
Section 3

The fee, and how to file

The fee is charged once per 12-month period, not once per filing — a common point of confusion.

£50 online, £110 by post

Only the FIRST confirmation statement delivered in a given 12-month period carries the fee. Any further statement filed within that same period — because something changed and you're updating the record early — is free.

Where the fee goes

Online filing is paid as part of the online submission. A postal cheque or postal order is made payable to 'Companies House.'

The checklist on page 3

Before sending: company name and number match the register, the lawful-purpose box is ticked, any relevant Part is attached (or the appropriate separate form has been filed instead), the form is signed with a name and capacity, director identity-verification details are supplied, and the correct fee is enclosed.

What's public

Everything on CS01 is on the public register, with two exceptions: a Part 5 registered email address, and identity-verification details — neither of those is published.

The fee is charged once per 12-month period, not once per filing — a common point of confusion.

Companies House · CS01
Section 4

Why this matters when you're running a deceased relative's company

CS01 isn't a probate form — no personal representative box, no estate reference — but it becomes urgent the moment the estate now controls a directorship.

The company doesn't pause for a death

Companies House's 14-day, 12-month clock keeps running whether or not anyone is actively dealing with the company. If the deceased was the sole director and shareholder of a small business, an executor stepping in — formally, as a newly appointed director, or informally while sorting out the estate — needs to keep this filing current.

File the officer change first

If the deceased was a listed director, that needs its own separate filing to remove them before (or alongside) the next confirmation statement. A confirmation statement filed on time with a dead person still listed as an active officer doesn't fix the underlying problem — it just confirms stale information is 'still correct.'

The real risk: being struck off

Missing the 14-day deadline risks the company being struck off the register while the estate is still trying to deal with the deceased's shareholding, access company bank accounts, or wind the company down in an orderly way. A struck-off company's assets can pass to the Crown as bona vacantia — a complication worth avoiding by simply keeping this filing current.

New director, new identity check

If an executor is appointed as a new director to keep the company running, Companies House's identity-verification requirement applies to them too — and that verification isn't instant, so it's worth starting well before the 14-day window opens, not after.

CS01 isn't a probate form — no personal representative box, no estate reference — but it becomes urgent the moment the estate now controls a directorship.

Companies House · CS01

Many people file CS01 themselves — that is what this walkthrough is for. If the situation behind it has stopped being simple — beyond what a careful person can safely do alone — Signum, Valoren’s own specialist desk, can take it on, and we say so plainly: it starts with a free intake, and if you do not need us, we will tell you. Prefer an independent adviser? STEP and the Chartered Institute of Taxation both keep public member directories, and neither pays Valoren a referral fee.

FAQ

CS01 questions, answered.

CS01 confirms that the company information Companies House already holds — officers, people with significant control, registered office, share capital, SIC codes — is still correct as at a set date.

It is a check-and-confirm filing, not a way to report a change.
No. CS01 cannot be used to change officers, PSC, registered office, or SAIL address details.

A director's death or resignation needs its own separate filing to Companies House, done before or alongside the confirmation statement — not instead of it.
Within 14 days of the confirmation date, which is the end of the company's 12-month confirmation period.

Every company — including a dormant one — must deliver at least one confirmation statement every 12 months, even if nothing has changed.
Failing to deliver a confirmation statement is a criminal offence under the Companies Act 2006, and can lead to the company being struck off the register.

A struck-off company's assets can pass to the Crown (bona vacantia) — a real complication if an estate still needs to deal with the deceased's shareholding or wind the company down in an orderly way.
£50 to file online, or £110 by post — but only for the first statement filed in a 12-month period. Any further statement filed within the same period is free.
A director, the company secretary, a person authorised under sections 270 or 274 of the Companies Act 2006, or — for specific entity types — a Charity Commission receiver and manager, CIC manager, or judicial factor.

Only a printed name is required at box 4, not a signature.
If the person who died was a director or shareholder of a small company — common among sole traders who incorporated, or small family businesses — the company still has to file on time while the estate is being administered.

A struck-off company complicates transferring or selling the deceased's shareholding, accessing company bank accounts, and dealing with company assets as part of probate.

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Where this fits

CS01 is one form. The file behind it is the rest.

The confirmation statement is only as fast as knowing what's already on the public register — the company number, the officers, and who holds significant control.

The Business Interests & Directorships record holds exactly that; People, Authority & Contacts carries the officer detail the filing checks against.

Companies House6 fields£50 to file online, or £110 by post — payable only with the FIRST confirmation statement filed in a given 12-month period; any further statement in the same period is free (current fee, effective 1 February 2026).10 minutes, once the company record is in one place with Valoren
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