UK self-employed · 2025/26 & 2026/27
UK Self-Employed Tax Calculator
See your take-home profit after income tax, Class 2 NI, and Class 4 NI — plus your payments on account schedule for self assessment.
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£0 £200k
Tax year
Region
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PAYE, rental, savings income etc.
Take-home profit
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/year
Monthly
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Total tax bill
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Where your profit goes
Take-home Income tax Class 4 NI Class 2 NI
Tax breakdown
- Taxable profit
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- − Personal allowance
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- − Income tax
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- − Class 4 NI (6% / 2%)
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- − Class 2 NI (£3.50/wk)
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- = Take-home profit
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Effective rates
- Income tax
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- Class 4 NI
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- Class 2 NI
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- Combined
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Payments on account
- 1st payment (Jan)
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- 2nd payment (Jul)
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- Balancing payment (Jan)
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Based on current year bill. Assumes no prior-year payments on account. First year in self-employment: no payments on account required.
Understanding your self-assessment tax bill
Income tax for self-employed
- → Same bands as employed workers — personal allowance, then 20%, 40%, 45%
- → Filed via Self Assessment tax return (deadline: 31 Jan online)
- → Profit = income minus allowable business expenses
- → Trading Allowance: £1,000 tax-free if gross income under £1,000/yr
National Insurance
- → Class 2: £3.50/wk flat rate (2025/26) if profits above £6,725. Protects state pension entitlement.
- → Class 4: 6% on profits between £12,570–£50,270, then 2% above. Paid via Self Assessment.
- → No employer NI — you pay the full employee-equivalent portion only.