UK Freelancer take-home calculator

How UK self-employed take-home is calculated

Sole traders report profits through Self Assessment and pay income tax plus Class 4 National Insurance. There's no PAYE, so you set aside and pay tax yourself.

Worked example (sole trader, £50,000 profit)

• Personal Allowance £12,570 → taxable £37,430
• Income tax: £37,430 at 20% = £7,486
• Class 4 NI: 6% on profit between £12,570 and £50,270 = ~£2,262
• Total ≈ £9,748 | Take-home ≈ £40,252 (80.5%)

Class 2 and Class 4 NI

Class 4 NI is 6% on profits between £12,570 and £50,270 and 2% above. Class 2 NI is now effectively voluntary for most (profits above the small-profits threshold are treated as paying it), but paying it preserves State Pension and benefit entitlement.

Payments on account

Self Assessment tax is due 31 January, with payments on account — two advance instalments toward next year's bill (50% each, due January and July). First-year traders often get caught out by effectively paying 150% of the bill in one January.

Sole trader vs limited company

Once profits comfortably exceed ~£30,000–£50,000, a limited company can be more tax-efficient via a small salary plus dividends — but adds Corporation Tax, annual accounts, and Companies House filing. Check IR35 status if you contract through your own company.

Common mistakes

• Forgetting payments on account. Budget for that first big January.
• Not claiming allowable expenses. Use of home, equipment, mileage, software.
• Missing the VAT threshold. Registration is required above £90,000 turnover.

What this doesn't cover

• IR35 inside/outside status
• VAT registration and returns
• Limited-company dividend planning