Tax Calculator 2025-25 Excel Format. Use this service to estimate how much income tax and national insurance you should pay for the current tax year (6 april 2024 to 5 april 2025). Enter data for the whole year in integers only.

Modify or adapt the sheet for personal use or add more details if required. An income tax calculator is a tool that allows you to estimate the amount of income tax you may owe based on your income, filing status, and other factors.