This page shows income tax and Class 4 NI with a quarterly set-aside estimate using current 2026/27 assumptions. Class 2 NI was abolished from April 2024 and is no longer payable.
Updated for 2026/27 · Reviewed by James Whitfield · Methodology and assumptions
| Annual profit | £37,000.00 |
| Personal allowance | £12,570.00 |
| Taxable income | £24,430.00 |
| Income tax — Basic rate (20%) | £4,886.00 |
| Income tax — Higher rate (40%) | £0.00 |
| Income tax — Additional rate (45%) | £0.00 |
| Class 4 NI — £12,570 to £50,270 (6%) | £1,465.80 |
| Class 4 NI — Above £50,270 (2%) | £0.00 |
| Total deductions | £6,351.80 |
| Net income | £30,648.20 |
Monthly net income
£2,554.02
Weekly net income
£589.39
Effective deduction rate
17.2%
Set aside £3,175.90 per quarter. Payment dates are typically 31 January and 31 July.
For £37,000 profit, the estimate combines income tax by band, Class 2 NI (where applicable) and Class 4 NI, then shows total deductions and net income.
Self-employed NI includes Class 2 (flat annual amount above the threshold) and Class 4 (6% then 2% by profits band). This page shows both parts separately.
A planning estimate is £3,175.90 per quarter for payments on account, with due dates typically 31 January and 31 July.
Get a PDF of this self-employed calculation with tax, NI and quarterly set-aside values.
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