UK sole traders, freelancers and contractors who want to know the real amount to set aside for the tax year, not a flat guess.
Como funciona
- Name this budget, e.g. "Tax year 2026/27".
- Enter your expected self-employed profit for the tax year in pounds.
- Read Income Tax and Class 4 NI separately, the combined total, and the monthly set-aside figure.
- The budget stays saved; recalculating it updates the same entry.
O que você ganha
- Income Tax at the real 2026/27 marginal bands (0% to £12,570, 20% to £50,270, 40% to £125,140, 45% above) - the top band applies only to the excess, not the whole profit
- Class 4 National Insurance (6% between £12,570-£50,270, 2% above) - the charge most freelancers forget to set aside for at all
- Personal Allowance taper above £100,000 - £1 of allowance lost per £2 of profit over £100,000, gone entirely by £125,140 (the '60% trap')
- Shows Income-Tax-only vs the real Income-Tax-plus-NI total side by side, in pounds
Captura de tela

Detalhes técnicos
Como configurar e usar
- Compre a licenca — sua chave (lic_...) aparece na pagina do pedido e no seu e-mail.
- Entre em app.synoriaai.com com sua chave de licenca.
- Sem instalacao — o produto roda no navegador, na sua instancia isolada.
- 1. Open the UKTaxBudget page.
- 2. Enter a name for your budget (e.g., 'Tax year 2026/27') in the 'Budget name' field.
- 3. Enter your expected annual profit (after expenses) in the 'Annual profit' field.
- 4. Click the 'Calculate' button.
- 5. View your results: Income Tax, National Insurance, total tax, and the monthly set-aside amount. Your budget is saved under the name you provided.
Perguntas frequentes
Is my financial data safe?
Yes, all calculations are done in your browser. We do not store or transmit your profit or budget data to any server.
Does this tool account for the Personal Allowance taper?
Yes, it automatically reduces your Personal Allowance by £1 for every £2 of profit over £100,000, and removes it entirely above £125,140, showing the '60% trap' effect.
Does it include Class 4 National Insurance?
Yes, it calculates Class 4 NI at 6% between £12,570 and £50,270, and 2% above, and shows it separately from Income Tax.
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