Filing deadline calculator
Enter a company year end and get the Companies House accounts deadline, the CT600 filing date, the corporation tax payment date and the confirmation statement date, with optional email reminders.
For writers, bloggers and forums
Free UK company tools you can link to, quote or embed
We build free tools for UK limited company directors: filing deadlines, name availability, allowable expenses, late filing penalties and a sole trader comparison. They are free to use, free to link to, and free to quote in articles, newsletters, forum answers and client guides. No sign up, no paywall, no adverts.
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What each tool does
Company name availability checker
Check whether a proposed limited company name is likely to be accepted, including the sensitive word and same-as rules Companies House applies.
Limited company expenses checker
Search a cost and see whether it is allowable for corporation tax, whether VAT can be reclaimed, and whether it creates a benefit in kind.
Sole trader versus limited company
Compare take home pay as a sole trader against a limited company at 2025/26 and 2026/27 rates, including National Insurance and dividend tax.
Is my company late? checker
Work out whether accounts or a confirmation statement are overdue, and the late filing penalty that applies.
Permission
How you may use them
- Link to any tool from an article, forum post, newsletter or resource page.
- Quote the outputs and explanations, with a link back to the page you took them from.
- Embed a tool in an iframe on your own site, as long as the link back stays visible.
- Use the tools with your own clients at no charge.
Please do not republish the tool logic as your own or strip the source link. Rates are reviewed against published HMRC and Companies House guidance for 2025/26 and 2026/27.
Copy and paste
Link and embed code
Simple text link:
<a href="https://limitedcompany.accountants/tools/filing-deadline-calculator">Free UK company filing deadline calculator</a>
Embed in a page:
<iframe src="https://limitedcompany.accountants/tools/filing-deadline-calculator" width="100%" height="900" style="border:1px solid #e5e5e5" title="UK company filing deadline calculator"></iframe>
For journalists and editors
Expert comment on UK small company tax
Waqas Sagar Member of ICAEW, Fellow of ACCA, Fellow of AAT can comment on limited company tax, Companies House filing and penalties, VAT and Making Tax Digital, payroll and IR35, landlord and property company tax, and ecommerce and marketplace VAT. We can usually turn a quote around the same working day.
Email hello@limitedcompany.accountants or call 020 3441 1258. Practice details: LimitedCompany.Accountants, 12 London Road, Morden, London SM4 5BQ.
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