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Companies House deadline checker
Enter a client's year end and get the usual accounts, Corporation Tax and confirmation statement dates, plus a sensible internal deadline. Useful for onboarding a new limited company client quickly.
Key dates
Enter a year end to see the deadlines.
Stop working these out by hand. Remindoo pulls company details and filing dates from Companies House onto the client record and sets the recurring tasks and reminders for every client automatically.
This is a planning aid, not an official source. Always confirm the filing dates shown on the company's Companies House record, particularly where a period has been shortened or extended. Search Companies House ↗
Companies House deadline questions
When are company accounts due at Companies House?
For an existing private company, accounts are normally due nine months after the accounting reference date. For a first set of accounts covering more than 12 months, they are due 21 months after the date of incorporation.
When is the confirmation statement due?
A confirmation statement must be filed at least once every 12 months, within 14 days of the end of the review period. The review period normally starts the day after the previous statement date.
When is Corporation Tax due?
For companies outside the quarterly instalment regime, Corporation Tax is normally due nine months and one day after the end of the accounting period, while the CT600 return is due 12 months after the period end.
Is this checker official?
No. It calculates the usual statutory dates from the year end you enter, as a planning aid. Always confirm the filing dates shown on the company's own Companies House record, especially after a period has been shortened or extended.
Does Remindoo do this automatically?
Yes. Remindoo pulls company details and filing dates from Companies House onto the client record and creates the recurring tasks and reminders, so you are not calculating dates by hand for every client.
What if the year end has been changed?
Shortening or extending an accounting period changes the filing deadline, and extensions are limited. Where a period has been changed, use the date shown on the Companies House record rather than a calculation.
Every deadline. Every client. One system.
Start with the workflows that cause the most chasing, then bring leads, AML, proposals and clients into the same calm operating system.
Why a single client record matters
When client details, deadlines, documents and conversations are spread across inboxes and spreadsheets, time goes on searching instead of on client work.
One version of the truth
Everyone sees the same services, contacts, deadlines and notes for each client.
Accurate deadlines
Companies House sync brings in company details and filing dates, reducing manual errors.
Better client service
A full timeline means anyone can answer a client question with the history in front of them.
Secure document sharing
A client portal is safer than sending financial documents as email attachments.
Practical tips from UK practice
- Import companies from Companies House rather than typing details by hand.
- Record every service a client takes, so recurring work is created automatically.
- Add a short note after every important client call.
- Ask clients to upload documents through the portal rather than by email.
Related Remindoo features
Written and reviewed by Waqas Sagar ACA FCCA FMAAT, Chartered Accountant with 18+ years in practice. Founder and MD of Accotax, an ICAEW, ACCA and AAT regulated London practice that has served over 5,000 clients, and founder of Remindoo. Guidance is general; check current GOV.UK and professional body guidance for your firm.
What UK practices say about Remindoo
Read all reviews on Trustpilot“With Remindoo, everything from the first enquiry to onboarding and ongoing client management is tracked in one place… It saves us hours and gives me, as a practice owner, complete visibility of where the firm stands.”
“The biggest benefit is having clients, tasks, deadlines, workflows, proposals and communication all organised in one place.”
“During my trial, the team were absolutely amazing. They helped onboard my clients, set up my settings and made sure everything was ready for me to use… they made the whole process completely stress-free.”
“It brings client information, tasks, recurring deadlines, workflows and reminders together in one place, giving us much better visibility across the team.”
