UK Self Assessment Tax Calculator 2024/25
Our UK Self Assessment calculator helps you estimate your tax bill if you need to file a Self Assessment tax return. You need to file Self Assessment if you are self-employed, have income over £100,000, receive rental income, have untaxed income over £2,500, or have complex tax affairs. The calculator covers employment income, self-employment profit (after allowable expenses), dividend income, and rental profit. It calculates income tax at the correct rates for each income type, Class 4 National Insurance on self-employment profits, and your payment on account obligations. Use it to plan your tax payments and avoid surprises.