The short answer: Self Assessment returns are due online by 31 January, Corporation Tax is payable 9 months and 1 day after the year end, VAT returns are due 1 month and 7 days after each period, and every company must file a confirmation statement at least once a year. Directors and PSCs must also verify their identity with Companies House.
Missing a deadline does not just trigger penalties; it can disrupt your cash flow and create unnecessary stress.
Quick Reference
| Obligation | Deadline |
|---|---|
| Self Assessment online return | 31 January after the tax year |
| Payments on account | 31 January and 31 July |
| Corporation Tax payment | 9 months and 1 day after year end |
| Company Tax Return (CT600) | 12 months after year end |
| Company accounts to Companies House | 9 months after year end (private companies) |
| VAT return and payment | 1 month and 7 days after period end |
| PAYE RTI submission | On or before each payday |
| Confirmation statement | At least every 12 months (£50 online) |
Self Assessment
Sole traders, landlords and directors with untaxed income must file by 31 January following the tax year ending 5 April. Payments on account are due on 31 January and 31 July.
Corporation Tax
Limited companies pay Corporation Tax 9 months and 1 day after the end of their accounting period and file the CT600 within 12 months.
VAT
Registration is required once taxable turnover exceeds £90,000. Returns are usually quarterly, with payment due one month and seven days after the period end.
Payroll (PAYE)
RTI submissions must be made on or before each payday. An Employer Payment Summary (EPS) is due by the 19th of the following month where adjustments are needed.
Confirmation Statement
Every limited company must file a confirmation statement with Companies House at least once every 12 months. The fee is £50 online.
Companies House Identity Verification
Under the Economic Crime and Corporate Transparency Act, directors and persons with significant control (PSCs) must verify their identity with Companies House. New directors must verify before appointment, and existing directors and PSCs must verify within the transition period, typically by the time of the company's next confirmation statement. Verification can be done through GOV.UK One Login or an Authorised Corporate Service Provider.
How We Help
We set up deadline reminders and handle filings so you never miss a date. Based in Andover, Hampshire, we support businesses across the UK. Get in touch.