Important Dates and Deadlines for the UK Tax Year 2023/24 

Important Dates and Deadlines for the UK Tax Year 2023/2024

Are you searching for important dates for taxes in the 2023/24 year?  

You are in the right spot! 

The previous tax year began on 6 April 2022 and ended on 5 April 2023. 


PAYE key tax dates


The first day of the new tax year 2023/24  6 April 2023 
Copies of 2022/23 P60 documents to employees must be issued on  31 May 2023 
The Copies of 2022/23 P11D documents must be issued to employees and 

The last date for agreeing payment settlement agreements for 2022/23 (if applicable) 

6 July 2023 
Deadline for paying Class 1A National Insurance Contributions. This only applies to benefits provided to employees, such as private medical insurance.  22 July 2023 
Second Income Tax and National Insurance payment on account deadline  31 July 2023 


Self Assessment key tax dates 


Deadline for claiming tax overpaid (2018/19) under Self Assessment  5 April 2023 
The first day of the new tax year 2023/24 

Time to gather detailed documents for tax returns for the year 2022/2023. 

6 April 2023 
Deadline to register with HMRC if you became self-employed or started receiving income from property (You should submit a form CWF1 for self-employment or form SA1 for non-self-employed income to HMRC.)  5 October 2023 


Deadline for paper Self Assessment returns (2022/23)  31 October 2023 (midnight) 

Deadline for online submission of Self Assessment tax returns (ending 5 April 2022) for HMRC to collect employment or pension income tax through PAYE tax codes if less than £3,000 is owed 

30 December 2023 
Deadline for filing company’s annual accounts (if accounting year end is 31 March)  31 December 2023 
Deadline for online Self Assessment tax returns (2022/23) 

The deadline for paying tax bill (tax year ending 5 April 2022/23) 


31 January 2024 (midnight) 
End of tax year (2023/24)  5 April 2024 


VAT tax return deadlines:  

Small businesses typically submit their VAT returns on a quarterly basis, following the Making Tax Digital (MTD) for VAT legislation, utilizing MTD-compliant software. The primary VAT return deadlines are as follows for each quarter: 

  1. 1st January to 31 March 
  2. 1st April to 30 June 
  3. 1st July to 30 September 
  4. 1st October to 31 December 

The due date for each VAT Return is one month and seven days after the respective quarterly period’s end. For example, the VAT return covering 1 January to 31 March 2023 should be sent to HMRC by 7 May 2023. 



  1. If you wish for HMRC to collect the owed tax from your wages and pension, submit your online return by December 30th, following the end of the quarter. 
  2. If you are a trustee of a registered pension scheme or a non-resident company, a paper tax return must reach HMRC by January 31st since online submission is not permitted. 


Get in Touch  

Just fill in your details here if you need assistance with managing your tax deadlines or any other tax-related matters or wish to discuss some other matters. 

Lanop Business and Tax Advisors are here to help ensure that your tax obligations are met promptly. We understand that staying on top of tax deadlines is crucial and we are here to meet these deadlines and navigate your tax responsibilities effectively we are committed to assisting you in this regard. 

At Lanop Tax Advisors, we pride ourselves on serving as your local financial experts, in Putney, Harley Street, and Battersea, also offering personalized assistance regardless of geographical barriers. Our dedicated staff is ready to support you in tax matters, accounting solutions, and strategic business advice. 

Don’t let tax deadlines cause you stress. We value the trust you have placed in us and are dedicated to fostering long-term relationships built on professionalism, reliability, and exceptional service. Your peace of mind is our priority. 

Get In Touch

Address: 389 Upper Richmond Rd, London SW15 5QL, United Kingdom.

CEO of Lanop

Aurangzaib Chawla

At Lanop, I am providing my services as the Managing Partner and Tax Specialist. My expertise includes helping medium and small-scale businesses in their accountancy and legal requirements, business start-up support, strategic review, payroll system review and implementation, VAT and tax compliance to cloud accounting. I am also an expert in financial reporting, identifying and monitoring risks, strategic business development, client retention, market acquisition and deals closure by carefully planning my sales cycle. 

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