sole.tax
2026 / 27
Photo your receipts. Pay your tax. Done.

Know exactly what to set aside for HMRC.

Enter your profit for the year — income minus allowable expenses — and see the full working: income tax, Class 4 and Class 2 National Insurance, the total to put by, and the effective rate. Real 2026/27 sole-trader rules, worked out in the open. Nothing hidden.

Your year as a sole trader

£
£
Set aside for HMRC
£4,531.80
15.1% of a £30,000 profit
You keep
£25,468.20
after tax & NI
Profit
£30,000
£45,000 − £15,000

The working — how your bill is calculated LIVE

MTD
built for Making Tax Digital for Income Tax — live since April 2026
6% / 2%
Class 4 NI, cut from 9% on 6 Apr 2024 — most calculators still show the old rate
3 years
2026/27, 2025/26 and 2024/25 rate sets, HMRC-verified
gov.uk
rates sourced to HMRC self-employed National Insurance + income tax guidance

How to read this. Every line shows its working from the 2026/27 sole-trader rules — the personal allowance, the income-tax bands your taxable profit falls into, and the Class 4 NI bands (6% between £12,570 and £50,270, 2% above). Above £100,000 profit the personal allowance is tapered by £1 for every £2 over £100,000 (gone entirely at £125,140), so higher earners see a smaller allowance and more tax. Class 2 NI is £0: mandatory Class 2 was abolished on 6 April 2024, so above the Small Profits Threshold you get a qualifying year with nothing to pay.  Scope. This estimates tax on your trading profit alone. Other income, pension contributions, reliefs, and payments on account are handled in the full ATTOH Sole Trader app. It's a calculation tool, not tax advice — your final liability is determined by HMRC.