You must tell HM Revenue and Customs (HMRC) about changes to your taxable income.
To do this you can either:
If you do not, you could pay too much tax or get a tax bill at the end of the year.
What you must tell HMRC
Your employer or pension provider tells HMRC when:
- you start or finish your job
- there’s a change in the money you earn from your job or get from your pension
But you must tell HMRC about any other changes, for example when you start or stop getting:
- income from a new source, such as money from self-employment or rent from property
- taxable benefits, such as State Pension, Jobseeker’s Allowance and Carer’s Allowance
- benefits from your job, such as a company car
- income above your Personal Allowance
- money over £85,000 from self-employment (you must register for VAT over this amount)
- lump sums from selling things you pay Capital Gains Tax on, such as shares or property that’s not your main home
- income from property, money or shares you inherit, such as dividends from shares or rent from property
If you get tax credits
Tell HMRC separately about changes that affect your tax credits.
If your spouse or civil partner dies
Tell HMRC about changes to your income after the death of your husband, wife or civil partner.
If you make Self Assessment ‘payments on account’
After you tell HMRC