The government announced in the Autumn Budget 2021 this has been implemented and starts coming into force in the 2023/24 tax year. Broadly, the intention is to tax profits that are time-apportioned to the tax year instead of the profits for the 12 months to the accounting date in the tax year. This reform affects individuals who are self-employed, including partners in trading partnerships, if their accounting periods are not aligned to the tax year (dates from 31 March to 5 April inclusive are treated as aligned to the tax year for this purpose).
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