There is an online tool that allows taxpayers to check if they need to notify HMRC about additional income. The online tool can be found at www.gov.uk/check-additional-income-tax.

This could include earnings from:

In most cases, these types of income are taxable. However, there are two separate annual £1,000 tax allowances for property and trading income. If you have both types of income highlighted below, then you can claim a £1,000 allowance for each. The online tool will indicate if this is relevant.

The £1,000 exemptions from tax apply to:

Where each respective allowance covers all the individual’s relevant income (before expenses) the income is tax-free and does not have to be declared. Taxpayers with higher amounts of income will have the choice, when calculating their taxable profits, of deducting the allowance from their receipts, instead of deducting the actual allowable expenses. 

Source:HM Revenue & Customs | 04-08-2023