Self-employed tax calculator 2026/27 (widget)

Self Assessment bill 2026/27

£6,092

Put aside 16.9 % of your profit · next £100 of profit costs 26.0 %

Profit	£36,000
Income Tax	£4,686
Class 4 National Insurance	£1,406
Class 2	treated as paid
Kept from your profit	£29,908

When you pay, if 2026/27 is your first year

31 January 2028: bill + first payment on account	£9,138
31 July 2028: second payment on account	£3,046

Each payment on account is half of £6,092 (Income Tax and Class 4, loans excluded). How payments on account work

Making Tax Digital at this turnover

Turnover of £42,000 is over the £30,000 test. If your 2025/26 return showed income like this, quarterly updates start on 6 April 2027. Check your start date

83 %

13 %

Kept

Income Tax

Class 4

Student loan

How this is calculatedAssumes a standard tax code on the wages and a 6 April to 5 April accounting year.