Self Employed Tax Calculator
Self employed tax calculator for UK sole traders: estimate the Income Tax and National Insurance on your profit, and how much to put aside each month.
Your results
- Total tax and NI
- £5,831.80
- Set aside each month
- £485.98
- Income Tax
- £4,486.00
- Class 4 National Insurance
- £1,345.80
- Take-home profit
- £29,168.20
- Personal Allowance used
- £12,570.00
How it's worked out (2026/27)
Profit = income minus allowable expenses. Personal Allowance £12,570 (reduced by £1 for every £2 over £100,000). Income Tax: 20% up to £50,270, 40% up to £125,140, 45% above. Class 4 National Insurance: 6% between £12,570 and £50,270, 2% above.
Rates for England, Wales and Northern Ireland; Scotland has different Income Tax bands. Doesn't include student loans, payments on account, pensions or other income. This is an estimate, not tax advice.
Self-employed rates on GOV.UKSelf Employed Tax Calculator FAQs: who is it for?
I've just gone self-employed. How much should I save for tax?
Enter your expected income and expenses and you'll see your estimated tax bill and how much to put aside each month. No nasty surprise when your first Self Assessment bill arrives in January.
I'm a freelancer deciding on my day rate. Can this help?
Try different income figures to see what you'd actually keep after tax and National Insurance. It helps you set a rate that covers your bills, not just your turnover.
I've got a side hustle on top of my job. Is this accurate for me?
It assumes self-employment is your only income. If you also have a job, your Personal Allowance is probably used up there, so treat this as a rough guide and expect to pay more.
Why do my expenses matter so much?
Tax is paid on profit, not income. Adding £1,000 of allowable expenses can save you £260 or more in tax and NI - you can see the effect instantly.