How UK Income Tax Works in 2024/25
UK income tax is calculated on a progressive band system — you only pay each rate on the portion of income that falls within that band, not on your entire salary. The personal allowance (£12,570) is the amount you can earn tax-free.
2024/25 England Tax Bands
- Personal Allowance: Up to £12,570 — 0% tax
- Basic Rate: £12,571 to £50,270 — 20% tax
- Higher Rate: £50,271 to £125,140 — 40% tax
- Additional Rate: Over £125,140 — 45% tax
Note: The personal allowance is reduced by £1 for every £2 earned over £100,000, meaning it is fully withdrawn at £125,140.
National Insurance (2024/25)
Employees pay Class 1 National Insurance at 8% on earnings between the Primary Threshold (£12,570) and the Upper Earnings Limit (£50,270), and 2% on earnings above this limit.
What Is PAYE?
Pay As You Earn (PAYE) is HMRC's system for collecting income tax and NI directly from your salary before you receive it. Your employer uses your tax code to calculate the correct deductions each pay period.
📊 Scottish Tax Bands
Scotland has its own income tax rates set by the Scottish Parliament. For 2024/25 there are six bands: Starter (19%), Basic (20%), Intermediate (21%), Higher (42%), Advanced (45%), and Top (48%).
🎓 Student Loan Repayments
Repayments are automatically deducted via PAYE once earnings exceed the plan threshold. Plan 2 threshold is £27,295; Plan 1 is £24,990. Repayments are 9% of earnings above the threshold.
🏦 Pension Tax Relief
Pension contributions attract tax relief at your marginal rate. Salary sacrifice schemes reduce your gross pay before tax and NI are calculated, increasing your effective take-home on contributions.
💡 Reduce Your Tax Bill
Maximise pension contributions, use ISA allowances, claim work-related expenses, and check your tax code is correct. Marriage Allowance can transfer £1,260 of unused personal allowance between spouses.