2026 headline rate bands
How Income Tax is calculated
Taxable income is split across the standard-rate band and the higher-rate band. Income within the available standard-rate band is taxed at 20%; the balance is taxed at 40%. Tax credits are then deducted from the gross Income Tax liability.
A tax credit is different from a deduction. A deduction generally reduces taxable income, while a tax credit reduces the Income Tax calculated.
Joint assessment
For a jointly assessed couple where both spouses or civil partners have qualifying income, part of the standard-rate band can increase. The increase is linked to the lower earner and is not simply a fully transferable second band. The Home Carer Tax Credit and the dual-income band increase also have an interaction, so the platform does not apply both automatically.
Use the calculator
The free calculator applies the 2026 rates alongside USC, PRSI, pension relief and supported credits to show the estimated net position and transparent workings.