About Sole Trader Calculator

Hi Im Symon Broadbent the creator of this site and the person behind D2Freelancing. This tool was built to help UK sole traders quickly estimate their income tax and National Insurance (NI) deductions based on the amount theyve invoiced.

What It Does

Enter your total invoice amount then choose one of the following:

• Full UK Tax + NI Calculation
• Income Tax Only
• National Insurance Only

The calculator gives you a breakdown of your estimated deductions and shows how much you might take home after tax.

Important Notes

This site is:

• Not run by tax professionals
• Not offering business or financial advice
• Not affiliated with HMRC

Its a personal project, created for educational and estimation purposes only. Use it at your own risk. While we aim to keep things accurate and up to date, tax rules change, and we cant guarantee everythings correct. Always double-check with HMRC or a qualified accountant if youre unsure.

How UK Income Tax & National Insurance Work (In Brief)

In the UK, self-employed sole traders pay:

• Income Tax on profits above the personal allowance (12,570 for most people)
• Class 2 NI: a small flat weekly rate if you earn over a threshold
• Class 4 NI: a percentage of profits above a certain limit

Rates and thresholds can change yearly, so its important to stay current.