This calculator is kept on the site as a quick utility, but it is not the focus of IsMyTaxDigital. If you came here for MTD, the right starting point is the MTD eligibility checker.

Sole traders

UK Self-Employed Tax Calculator (2026-27)

Enter your annual self-employed profit to estimate Income Tax and Class 4 National Insurance owed for the current UK tax year.

Tax year: 2026-27 · Last reviewed: 30 April 2026 · Sources: GOV.UK Income Tax rates, GOV.UK Class 4 NI

Your inputs

Enter your details

Where do you live for tax?

Scottish residents pay Scottish Income Tax. Class 4 NI is UK-wide.Annual self-employed profit

GBP

Quick:

Gross turnover (optional, for MTD check)

GBP

Income before deducting expenses. HMRC uses this to assess MTD eligibility, not your profit.

Your estimate

Self-employed estimate

After tax & NI

£41,471

From £52,000 profit

Of every £1 of profit:

You keep79.8%

Income Tax15.8%

Class 4 NI4.4%

Trading profit£52,000

Personal allowance£12,570

Income Tax£8,232

Class 4 National Insurance£2,297

Estimated amount after tax and NI£41,471

Uses Income Tax bands for England, Wales, and Northern Ireland. Does not include payments on account, student loans, pension relief, losses, or voluntary Class 2 contributions. This calculator provides a broad estimate only and is not tax advice.

Share this estimate with the inputs pre-filled. The share link may include the income figures you entered. Only share it with someone you trust.

Tax estimate uses your profit. MTD eligibility uses your gross qualifying income before expenses. Even your profit alone exceeds £50,000, so MTD applies regardless of expenses.

MTD applies (April 2026 cohort)

Likely in the live MTD ITSA cohort.

Based on the £52,000 you entered. If your 2024-25 qualifying income (gross self-employment + property, before expenses) was above £50,000, HMRC has mandated Making Tax Digital for Income Tax since 6 April 2026.

HMRC checks qualifying income in a specific past tax year, not today's figure. Use the MTD eligibility checker for a year-precise result →

See full MTD result →MTD eligibility checker

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