Small business accounting calendar: key tax dates and deadlines for 2023/24

Whether you’re new to the business world or a veteran, it’s always important to keep key accounting dates in mind for the year ahead to keep on top of your reporting duties to HMRC.

Here are all the major accounting dates and deadlines that you need to be aware of for 2023/24.

Every month

• 1^st - Annual Corporation Tax due for companies with a year ending nine months and a day earlier, e.g. tax due 1 January 2024 for the year ending 31 March 2023.
  

• 14^th - Quarterly instalment of Corporation Tax due for large companies (depending on accounting year-end).

• 19^th - Pay PAYE/NIC and CIS deductions for the period ending 5th of the month if not paying electronically. Submit CIS contractors’ monthly return.
• 22^nd - PAYE/NIC and CIS deductions paid electronically should have cleared into HMRC bank account.
• Submit CT600 for a year ending 12 months earlier. Last day to amend CT600 for a year ending 24 months earlier.
• If the due date for payment falls on a weekend or Bank Holiday, payment must be made by the previous working day. Electronic payments sent using the Faster Payments Service (FPS) can clear into HMRC’s account on a non-banking day.
• File accounts with Companies House for private companies with a year ending nine months earlier and for public companies with a year ending six months earlier.

2023

• March 31^st - Last minute planning for 2022-23 tax year. Make sure to use any CGT and IHT annual allowances and exemptions.

• April 5^th - Last day of tax year (6 April 2023, first day of new tax year).
• April 14^th - Due date for CT61 return and CT payment for quarter to 31 March 2023.
• May 3^rd - Submit employer forms P46 (car) for quarter to 5 April 2023.
• May 31^st - Last day to issue 2022-23 P60s to employees.
• July 5^th - Final date to agree 2022-23 PAYE Settlement Agreements (PSA).
• July 6^th - Last date for returns of expenses and benefits (forms P11D, P9D and P11D(b)) for 2022-23 to reach HMRC. Relevant employees to receive copies of forms P11D and P9D.
• July 6^th - Last date to submit annual returns for employee share schemes and employment-related securities for 2022-23 (forms 34, 35, 39, 40 and 42).
• July 14^th - Due date for CT61 return and CT payment for quarter to 30 June 2023.
• July 22^nd - Class 1A NICs for 2022-23 due (19th if paid by cheque).
• July 31^st - Due date for second payment on account of 2022-23 Income Tax and Class 4 NICs.
• July 31^st - Last day to pay 2021-22 tax to avoid second automatic 5% surcharge.
• August 2^nd - Submit employer forms P46 (car) for the quarter to 5 July 2023.
• October 5^th - Deadline to notify HMRC of chargeability to Income Tax or CGT for 2022-23.
• October 14^th - Due date for CT61 return and CT payment for the quarter to 30 September 2023.
• October 31^st - Deadline to submit 2022-23 Self-Assessment tax return if filed on paper.
• November 2^nd - Submit employer forms P46 (car) for the quarter to 5 October 2023.
• December 30^th - Last day to submit the 2022-23 tax return online to have an unpaid tax of up to £17,000 collected through the 2024-25 PAYE code.
  
  

2024

• January 14^th - Due date for CT61 return and CT payment for the quarter to 31 December 2023.
• January 31^st - Submit 2022-23 Self-Assessment return online. Pay balance of 2022-23 Income Tax and CGT plus first payment on account for 2023-24.
• February 2^nd - Submit employer forms P46 (car) for the quarter to 5 January 2024.
• March 31^st - Last minute planning for 2023-24 tax year. Make sure to use any CGT and IHT annual allowances and exemptions

Page updated on 20/05/2023