The length of time you need to keep tax records depends on the types of income you earn and the types of tax you are paying. A list of time limits is set out below:
Income Tax and Capital Gains Tax
1. If you are not in business
One year from the 31 January following the end of the tax year. For 2016-17, you would need to keep your records until 31 January 2019.
2. If you are in business – which includes rental income
Five years from the 31 January following the end of the tax year. For 2016-17, you would need to keep your business and other tax records until 31 January 2023.
3. ...