Self-Employed Tax and National Insurance Excel Spreadsheet Calculator

Description

Keep track of your tax and national insurance liability during the year with this Self-Employed Tax and National Excel Spreadsheet Calculator for tax years from 2025/26. Suitable for self-employed individuals with a 1257L tax code and other codes ending in L, P, T, Y, M and N, resident in England, Wales and Northern Ireland. The Excel spreadsheet calculates monthly and cumulative tax and national insurance for self-employed individuals, letting you set aside money monthly to ensure you have sufficient money saved to cover your annual tax and NI liability. The spreadsheet includes a section to enter any self assessment payments you have made on account. The spreadsheet also includes a calculator which provides an annual estimate of your potential tax and national insurance liability.