If you earn more than 100,000, your tax code also allows for the income-related reduction to the Personal Allowance
. If you earn more than 150,000 from your main source of income, tax is deducted at 50 per cent as appropriate. It may be that your tax may well need to be adjusted when your self assessment tax return is submitted so that gift aid or pension contributions are treated properly. Whatever your circumstance, if you are unsure whether or not you are on the right tax code, you should first contact your payroll department. If you have an accountant, they can check whether it is correct. Most of the time, codes are accurate but it's always worth checking to make sure.