UK freelancers in 2026/27 must: register for Self Assessment within 3 months of starting (or by 5 October after the tax year); file annually by 31 January (online); pay income tax + Class 4 NI via Self Assessment; register for VAT if turnover exceeds £90,000; register for MTD ITSA from April 2026 if income above £50,000; keep digital records from MTD start date; and arrange their own pension (no auto-enrolment). The £1,000 Trading Allowance is available for very small earnings.
Your year-one priority list
The 10 obligations and decisions every UK freelancer must handle
1. Self Assessment registration
Mandatory within 3 months of starting self-employment, or by 5 October following the tax year. Penalty for late registration: £100+. Full guide: How to register for Self Assessment.
2. Annual Self Assessment filing
Online by 31 January following the tax year (or paper by 31 October). Use the SA100 main return plus SA103 self-employment supplementary page. Full walkthrough: Self Assessment walkthrough 2026/27.
3. Income tax + Class 4 NI
Calculated on net profit. Income tax: 0% / 20% / 40% / 45% by band. Class 4 NI: 6% / 2% above £12,570. See: Class 4 NI deep dive.
4. Payments on Account
50% of last year’s tax due 31 January with current year balance; another 50% by 31 July. Catches every new self-employed person in year 2. See: Payments on Account guide.
5. Allowable expenses
Reduce taxable profit by claiming legitimate business expenses (office, travel, use of home, equipment, professional fees). See: Allowable expenses guide.
6. VAT registration and scheme choice
Mandatory above £90,000 turnover. Voluntary below £90,000. Four schemes: Standard, Flat Rate, Cash Accounting, Annual Accounting. See: UK VAT schemes explained.
7. Making Tax Digital for ITSA
Mandatory from April 2026 if combined self-employed + property income above £50,000. Quarterly digital submissions + EOPS + Final Declaration. See: MTD ITSA guide.
8. Pension
No auto-enrolment. Set up your own SIPP. Annual Allowance £60,000. 20-47% tax relief depending on income. See: Self-employed pension guide.
9. Mortgage preparation
2-3 years of SA302s typically required. Aggressive expense claims hurt borrowing capacity. Plan 12-24 months ahead of application. See: Self-employed mortgage guide.
10. Sole trader vs Ltd Co incorporation
Break-even around £50-60k profit. Above that, Ltd Co often saves £2,000-£8,000/year. See: Sole trader vs Ltd Co decision.
If your work resembles employment - the IR35 problem
If you have one main client and your work resembles employment (working hours dictated, equipment provided, exclusivity, etc.), your contracts may fall "inside IR35". The tax consequences are material: deemed-employment income tax and NI on most of the contract value. Use our IR35 employment status checker if uncertain.
If you work in construction - the CIS overlay
Construction subcontractors face CIS deductions on top of normal self-employed obligations. 20% deducted at source (standard) or 30% (unregistered). Reclaimable via Self Assessment. See: CIS guide.
Critical deadlines summary
| Date | Obligation |
|---|---|
| 5 October (after tax year end) | Register for Self Assessment if first year |
| 31 October | Paper Self Assessment deadline (if filing on paper, rare) |
| 31 January | Online Self Assessment filing + balancing payment + 1st POA |
| 31 July | 2nd Payment on Account |
| 30 days from £90k threshold crossing | VAT registration |
| From April 2026 | MTD ITSA quarterly submissions (if £50k+ qualifying income) |
| 5 May (annual MTD year-end) | Q4 MTD update due |
The financial protection layer
Self-employed people have less safety net than employees. Plan for:
- Sickness: No statutory sick pay. Consider income protection insurance.
- Pension: No auto-enrolment. SIPP set up early.
- Holidays: No paid leave. Budget for income gaps.
- Maternity / paternity: Maternity Allowance applies (lower than SMP). Limited paternity provision.
- Redundancy: Not applicable - but business interruption insurance can cover sudden client loss.
- Emergency fund: 6-12 months of essential expenses in accessible savings - much more than employees typically hold.
Open the sole trader calculator
Run your annual tax bill, Class 4 NI and Payments on Account in one place. The most-used calculator for UK freelancers.
Open the sole trader calculatorSources and references
Self Assessment framework from gov.uk Self Assessment. VAT thresholds from gov.uk VAT thresholds. MTD ITSA from gov.uk MTD. IR35 from gov.uk IR35. Maternity Allowance from gov.uk Maternity Allowance.
UK Tax Drag is educational and not regulated financial, tax, legal or business advice - see the disclaimer for the full position. Always verify current rates and rules at the original government sources before acting.
Other self-employed deep guides
- Construction Industry Scheme (CIS) - full UK guide
- Making Tax Digital for ITSA - 2026/27 rollout
- UK VAT schemes explained - flat rate, cash, annual
- Allowable expenses for UK self-employed
- Sole trader vs limited company - the decision
- Self-employed pension guide
- Self-employed mortgage applications
- Payments on Account explained
- Class 4 NI for the self-employed
- UK freelancer tax survival guide
How UK Tax Drag holds itself to account
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