UK Tax Guide 2026: Income Tax, NI & Self Assessment
9 min read • Updated 2026
UK tax can feel overwhelming, but it's simpler once you understand the bands, allowances, and deadlines. This guide covers income tax, National Insurance, VAT, and Self Assessment for 2026.
Income Tax Bands 2026 (England & NI)
| Band | Income Range | Tax Rate |
|---|
| Personal Allowance | £0 – £12,570 | 0% |
| Basic Rate | £12,571 – £50,270 | 20% |
| Higher Rate | £50,271 – £125,140 | 40% |
| Additional Rate | Over £125,140 | 45% |
Important: Personal Allowance reduces by £1 for every £2 earned over £100,000. If you earn £125,140+, your Personal Allowance is £0.
National Insurance (2026)
| Earnings | Rate | Type |
|---|
| £0 – £12,570 | 0% | No NICs |
| £12,571 – £50,270 | 8% | Main rate (employees) |
| Over £50,270 | 2% | Additional rate |
Self-employed pay Class 2 (£3.45/week) and Class 4 (6% on profits £12,570–£50,270, then 2%).
Self Assessment: Who Needs to File?
You must file a Self Assessment tax return if:
- Self-employed and earned more than £1,000
- Rent out property (income over £1,000)
- Earn over £2,500 from savings/investments
- Earn over £100,000 (even if employed)
- Have foreign income or capital gains over £49,200
⚠️ Key Deadlines: 31 October (paper), 31 January (online). Fines start at £100 even if you owe no tax.
VAT Guide for Small Businesses
You must register for VAT if your turnover exceeds £90,000 in any 12-month period. Current VAT rates:
- Standard rate (20%): Most goods and services
- Reduced rate (5%): Home energy, children's car seats
- Zero rate (0%): Most food, books, children's clothes
💡 Flat Rate Scheme: Small businesses with turnover under £150,000 can use flat rate VAT (simpler accounting but can't reclaim most VAT).
Tax-Free Allowances You Might Miss
- Personal Savings Allowance: Basic rate payers: £1,000 interest tax-free; higher rate: £500
- Dividend Allowance: £1,000 tax-free dividends (then 8.75% basic, 33.75% higher)
- Capital Gains Tax Allowance: £6,000 gains tax-free (then 10%/20%)
- Rent-a-Room Scheme: Earn up to £7,500 tax-free from lodgers
- Marriage Allowance: Transfer £1,260 of personal allowance to spouse (save £252/year)
How to Pay Less Tax (Legally)
- ✅ Maximise pension contributions (tax relief on the way in)
- ✅ Use ISA allowance (£20,000/year tax-free growth)
- ✅ Claim work-from-home expenses (£6/week without receipts)
- ✅ Charitable Gift Aid (charity gets 25% top-up, higher rate payers reclaim difference)
📌 Quick win: If you're a basic rate taxpayer earning over £50,270, putting extra into your pension keeps you out of the 40% tax band. Every £100 you over-earn above £50,270 costs £40 in tax unless you pension it.