Self Employment Tax Calculator

The self employment tax calculator is designed to calculate the Income Tax, Class 4 National Insurance, Student Loan Repayments and optional Rent a Room scheme earnings for a self employed individual.

22/06/2010: Updated to include new Personal Tax Allowance for 2011/2012

  • £
  • £
  • £
Show Calculations 09/1010/1111/12
Income Tax £0£0£0
  20% of £0 profit - £6475 tax free allowance.20% of £0 profit - £6475 tax free allowance.20% of £0 profit - £7475 tax free allowance.
Class 4 NI £0£0£0
  8% of £0 profit - £5715 Class 4 NI lower limit.8% of £0 profit - £5715 Class 4 NI lower limit.8% of £0 profit - £5715 Class 4 NI lower limit.
Total Due £0£0£0

Frequently Asked Questions

Does this calculator apply if I'm working for an umbrella / as a limited company?

No - this self employed tax calculator is designed to provide calculations for sole traders / individuals.

Would I save tax by incorporating / working for an umbrella company?

Quite possibly - see this article on the advantages and disadvantages of incorporating.

The calculations here don't match up to HMRC / I've spotted an error!

You're probably right - this calculator is designed as a guide only. If you've spotted an error, please let me know.