Claiming overlap relief

1 September 2023

To claim overlap relief, you will need to know what your overlap profits are.

advice : Tax

If you are self-employed, how your profits are taxed is changing. Now you only have a limited window to claim relief for any profits that have been taxed twice, known as overlap relief.

Basis period reform

For 2022/23 and earlier tax years, self-employed individuals were taxed on a current-year basis. This meant that you were taxed on the profits for the accounting period that ended in the tax year. However, from 2024/25, you will be taxed on the profits for the tax year. If you prepare your accounts for 31 March or 1 to 5 April, this is deemed to be equivalent to the tax year. However, if you prepare your accounts for another date, you will need to apportion the profits from two accounting periods to arrive at the profits for the tax year.

To move from the current year basis to the tax year basis, the 2023/24 tax year is a transition year. If your accounting date does not correspond to the tax year (or is not treated as corresponding to the tax year), you will be taxed on more than 12 months’ profits in 2023/24. The profits taxed are those for the 12 months from the end of your 2022/23 basis period, plus those for the remainder of the 2023/24 tax year, less any overlap relief. 

For example, if you prepare your accounts to 30 September 2023/24 you will be assessed on the profits for the year to 30 September 2023 plus the profits from 1 October 2023 to 5 April 2024, less any overlap relief. The profits from 1 October 2023 to 5 April 2024 are the transition profits. These profits, less any overlap relief, are spread over five tax years from 2023/24 unless you elect otherwise.

Overlap relief

Overlap profits are profits that are taxed twice. This may occur either in the early years of a business or on a change of accounting date. Under the current year basis, relief for overlap profits (overlap relief) was given on cessation or in a tax year in which there was a change of accounting date as a result more than 12 months’ profits were taxed in that year.

If you have overlap profits in respect of which relief has not been claimed, the last chance to do this is for the 2023/24 tax year. Relief will normally be claimed against the transition profits for that year.

Overlap relief must be claimed in your 2023/24 tax return, which must be filed by 31 January 2025.

Determining your overlap profits

To claim overlap relief, you will need to know what your overlap profits are. This may not be a number that you have easily to hand, particularly if you started your business many years ago.

HMRC is launching an online form which can be used to submit requests for details about overlap relief. At the time of writing, it was expected that the service would be available from 11 September 2023. They will only be able to provide information on overlap relief if the figures are recorded in their systems, taken from tax returns that you submitted previously. If the information was not provided to HMRC in your tax returns, HMRC will be unable to provide it. When requesting overlap relief information, you need to supply some details about your business to HMRC. 

You can request information on your overlap profits ahead of the launch of the online form. If you choose to do this, you will need to supply the following information:

  • your name;
  • your National Insurance number or your Unique Taxpayer Reference (UTR);
  • a name or description of your business, or both;
  • whether you operate as a sole trader or are in a partnership;
  • the date that you commenced as a sole trader or the date of commencement of the partnership, as applicable; 
  • the start and end date of the most recent accounting period; and
  • the year(s) in which the accounting date changed, if relevant.

Relief for overlap profits that are not claimed in 2023/24 will be lost.

The information available on this page is of a general nature and is not intended to provide specific advice to any individuals or entities. We work hard to ensure this information is accurate at the time of publishing, although there is no guarantee that such information is accurate at the time you read this. We recommend individuals and companies seek professional advice on their circumstances and matters.