Self Assessment Calculators 2025/26

The following tools and calculators are provided to support you with your preparation for your 2025/26 Self Assessment Tax Return and complement the Self Assessment Tax Guides for the 2025/26 Tax Year. If you would like us to add another calculator in support to support your Self Assessment calculations, please contact us and we will get in touch to discuss your requirements. Calculators are provided free of charge, we simply request that you provide information to support the development and test the calculator once it is complete.

Self Assessment Calculator

1. Employer NIC Calculator
2. Dividends Calculator 2025/26
3. Corporation Tax Calculator 2025/26
4. VAT Calculator
5. Payslip Calculator and Analysis
6. 2025/26 PAYE Calculator
7. Simplified TimeSheet Calculator
8. Timesheet Calculator
9. P60 Tax Return Process

Self Employed

1. Tax for the self employed
2. Do you need an accountant to do your tax return?
3. Self employed Tax and NI
4. Simplified expenses - Self Employed
5. Tax codes and their meanings
6. Tax relief for trading loss
7. What is IR35?
8. Who needs to file a tax return?
9. Claiming expenses when self employed
10. Registering For VAT
11. Dividend Tax Guide

Tax Relief

1. Bad Debt Relief
2. Capital Gains Tax
3. Cutting savings and investments tax bill
4. Junior ISAs
5. Personal allowance
6. Personal savings allowance
7. Rent a room relief
8. Salary Sacrifice FAQ
9. Salary sacrifice scheme
10. Savings and Investments taxes
11. Student loan repayments