Self-employed tax calculator 2026/27
Estimate your income tax, Class 4 National Insurance and payments on account, and how much to put aside every month.
Updated 30 September 2026 · rates for 6 April 2026 – 5 April 2027
| Taxable profit | |
| Personal allowance | |
| Income tax on profit | |
| Class 4 National Insurance | |
| Class 2 | |
| Total | |
| Payments on account (each) | |
| Save per month | |
| Effective rate on profit |
Keep your records all year
The Self Assessment Tracker 2026/27 logs income and expenses in HMRC categories, mileage and home office, and updates this estimate as you go.
See the tracker on EtsyFAQ
What are the 2026/27 rates used?
Personal allowance £12,570 (tapered above £100,000). England, Wales & NI: 20% basic, 40% higher from £50,270, 45% additional above £125,140. Scotland: 19%, 20%, 21%, 42%, 45%, 48%. Class 4 NI: 6% on profits between £12,570 and £50,270, 2% above.
Do I pay Class 2 National Insurance?
Since April 2024 self-employed people with profits of £7,105 or more are treated as having paid Class 2 without paying it. Below that you can pay voluntarily to protect your State Pension.
What are payments on account?
If your Self Assessment bill is £1,000 or more (and less than 80% of your tax is collected at source), HMRC asks for two advance payments towards next year, each 50% of this year's bill, due 31 January and 31 July.
Does Making Tax Digital apply to me?
From 6 April 2026 MTD for Income Tax applies to sole traders and landlords with qualifying income over £50,000, from April 2027 over £30,000 and from April 2028 over £20,000.
Is this tax advice?
No. It is an estimate for planning. It ignores student loans, the High Income Child Benefit Charge, pension relief, losses and savings or dividend income.
Sources: GOV.UK income tax rates and allowances, National Insurance rates for the self-employed, Scottish income tax 2026/27, Making Tax Digital for Income Tax. Estimates only; check your final figures with HMRC or an accountant.