Your figures
£
Your self-employed income minus allowable expenses, before tax.
Where do you pay income tax?
Is this your first year in Self Assessment?
£
Income tax plus Class 4 National Insurance from last year's return. It sets your payments on account for this year.
Your estimate
Put aside each month
£0
Tax bill for 2026/27
£0
Share of your profit
0%
| Income tax | £0 |
| Class 4 National Insurance | £0 |
| Total for 2026/27 | £0 |
When HMRC wants it
Get a reminder before 31 January
Free tips on setting aside tax, and a nudge before the deadline. A few emails a year, no spam.
Keep this running all year
This page gives you one number. Cash Flow Engine keeps it live: a Google Sheet you own that tracks your tax set-aside as money comes in, projects your cash 52 weeks ahead, and shows what each client actually earns you. One-off price, no subscription.
First 100 copies £20 with the code FIRST100 (normally £200).
See Cash Flow Engine