Freelance Tax Calculator

Freelance tax in the UK is calculated on your net taxable profit: total business income minus allowable expenses. Allowable expenses include materials, software, professional subscriptions, travel, insurance, a proportion of home office costs, phone, and accountancy fees. The resulting profit figure is then subject to Income Tax and two classes of National Insurance via the Self Assessment system, with payments due by 31 January following the tax year.

Income Tax is applied in bands after deducting the £12,570 Personal Allowance: 20% on the first £37,700 of taxable income (basic rate), 40% on income between £50,271 and £125,140 (higher rate), and 45% above £125,140 (additional rate). The Personal Allowance reduces by £1 for every £2 of income above £100,000, reaching zero at £125,140—creating an effective 60% marginal rate in that band.

Class 2 NI was abolished from 6 April 2024 — self-employed people no longer pay it. You receive NI credit automatically if profits reach £6,725 (Small Profits Threshold). Class 4 NI is 6% on profits between £12,570 and £50,270, then 2% on profits above £50,270. Both are collected through Self Assessment. Payments on Account (two advance payments of 50% each in January and July) apply if your tax bill exceeds £1,000 and less than 80% is collected at source.

UK freelance tax 2026/27. Self-employed tax bands (same as employees): 0% to £12,570; 20% to £50,270; 40% to £125,140; 45% above. Class 4 NI: 6% on profits £12,570-£50,270; 2% above £50,270. Class 2 (£3.45/week) abolished from April 2024 — NI credit toward State Pension automatic if profits over £6,725 (Small Profits Threshold). VAT mandatory registration at £90,000+ turnover (2026 threshold). Trading Allowance: first £1,000/year tax-free (don't even need to register).

Allowable expenses for freelancers. Wholly-and-exclusively rule: business equipment (laptop, desk), software/subscriptions, professional fees, accountancy, training, advertising, postage, supplies. Mileage 45p/25p OR actual vehicle costs. Home office: use Simplified Expenses (£10-£26/month) OR actual costs (proportion of home × utilities × time). Travel to client meetings deductible; daily commute NOT. Subsistence (meals) on overnight business trips: deductible. Subsistence on normal day at usual client: NOT deductible.

Payments on Account — the cashflow shock. When tax bill exceeds £1,000 AND less than 80% collected at source: pay POA. 50% of NEXT year's bill due 31 January (alongside this year's balancing payment); other 50% due 31 July. First year freelance: pay current year tax PLUS 50% advance for next year = double bill effect. Sample first year: £50k profit = £8,000 tax + £4,000 POA = £12,000 due 31 Jan. Set aside 25-35% of profit monthly to avoid scramble.

Common UK freelance mistakes. (1) Not registering with HMRC within 3 months of starting — £100 fine + late filing penalties. (2) Forgetting POA — major cashflow shock. (3) Mixing personal/business expenses on same bank account — accountant nightmare. (4) Not setting aside tax — leads to using next month's income to pay last quarter's bill. (5) Claiming personal items (lunch, normal commute, gym) as business — HMRC investigates and disallows. (6) Filing late: £100 immediate, escalating to £1,600+. File May-July (right after tax year end) for time to fix any issues.

Should I go limited company? Tax savings begin at ~£40-£45k profit. £50k profit: limited company saves £2,000-£3,500 vs sole trader (after CT + dividend tax + accountant £1,200). £80k profit: saves £4,000-£7,000. Costs: incorporation £200-£500; annual accounts £1,200-£2,400; statutory filings; more complex tax. Benefits: pension contributions through company (tax-efficient); separate legal entity (limited liability); professional image. Drawbacks: IR35 compliance for contracted services; restricted access to profits (must extract via salary/dividends); director responsibilities. Sole trader simpler under £40k profit — go limited above.