Important Tax Deadlines, Accounting Deadlines & General Dates For Small Business Owners

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Are you a small business owner who’s feeling overwhelmed by all the dates you need to remember?

CFO360 UK is here to help!

We’ve compiled a list of all the important tax deadlines, accounting deadlines and general dates that you need to know.

Plus, we’ll keep this list updated throughout the year so you always have the latest information at your fingertips.

This guide will help you stay organized and on top of your game. With everything in one place, you can easily plan ahead and make sure that you don’t miss any important deadlines.

Scroll down and and take a look at our free comprehensive list of key dates for small businesses!

Important Tax Deadlines, Accounting Deadlines & General Dates


  • FPS – Full Payment Summary.
  • EPS – Employer Payment Summary.
  • CT61 – form used to claim income tax return, interest return and return on alternate finance payments.
  • CIS – Construction Industry Scheme.
  • NIC – National Insurance Contributions. 
  • PAYE – Pay as you earn.
  • P60 – A P60 form is a statement showing how much you have earned, and the amount of tax you have paid in the last tax year.
  • P11D – A P11D form is sent to HMRC outlining the cash value of any work-related taxable expenses and taxable benefits you’ve received over the tax year (6 April-5 April). These are only benefits or expenses that have not already been included in your wages.
  • P11D(b) – P11D(b) tells HMRC how much Class 1A National Insurance you need to pay on all the expenses and benefits you’ve provided.
  • Form 42/ERS (Employment Related Securites) Annual Return – A return submitted to HMRC each year to report certain share transactions involving employees or directors.

HMRC Deadlines

  • VAT – Due and payable one month and 7 days after the end of the VAT period.
  • Annual Accounts & Corporation Tax – Annual Accounts due to Companies House 9 months and one day after company year end and Corporation Tax return due 12 months after company year end.
  • Self Assessment – Due 31 January following the end of the tax year.
  • P11D – Due 6 July following the end of the tax year.

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