Understanding Your UK Payslip
Your payslip shows more than just your salary — it is a detailed record of every deduction that sits between your gross pay and the money that lands in your bank account. Understanding each line helps you verify you are being taxed correctly, plan your budget accurately, and spot errors before they compound over time.
The UK operates a Pay As You Earn (PAYE) system, which means your employer deducts income tax and National Insurance (NI) from each payment before it reaches you. HMRC issues each employee a tax code — typically something like 1257L — that tells your employer how much personal allowance to apply. The standard personal allowance for 2025/26 is £12,570, meaning the first £12,570 of your income is tax-free.
What Each Line on Your Payslip Means
- Gross pay: Your total earnings before any deductions — the figure in your employment contract.
- Personal allowance: The amount of income you can earn tax-free each year, determined by your tax code.
- Taxable income: Gross pay minus your personal allowance (and any salary sacrifice contributions). This is the income on which tax is calculated.
- Income tax: Deducted progressively across tax bands — you only pay the higher rate on income above each threshold, not on your full salary.
- National Insurance: A separate contribution that funds state benefits including the NHS and State Pension. Employees pay at different rates depending on weekly earnings.
- Net pay (take-home pay): What remains after all deductions — the amount paid into your bank account.
How the 2025/26 Income Tax and NI Bands Work
The UK uses a progressive income tax system. You do not pay the higher rate on your entire salary — only on the slice of income that falls within each band. For 2025/26, the bands are:
- Personal allowance (£0–£12,570): 0% — no income tax on this portion.
- Basic rate (£12,571–£50,270): 20% on income within this band.
- Higher rate (£50,271–£125,140): 40% on income within this band.
- Additional rate (above £125,140): 45% on income above this threshold.
Note that the personal allowance is tapered for high earners: if your income exceeds £100,000, your personal allowance reduces by £1 for every £2 above that figure, reaching zero at £125,140. This creates an effective 60% marginal rate on income between £100,000 and £125,140 — a common planning consideration for higher earners.
Employee National Insurance for 2025/26 is charged at 8% on weekly earnings between £242 and £967, and 2% on weekly earnings above £967. Unlike income tax, NI has no personal allowance taper — the thresholds are simply applied to weekly earnings.
How Pension Contributions Affect Your Take-Home Pay
Pension contributions reduce your take-home pay, but not pound-for-pound — and the method your employer uses makes a significant difference to how much you actually give up.
Relief at Source (Auto-Enrolment)
Under relief at source — the most common method for auto-enrolment schemes — you contribute from your net pay. Your pension provider then claims basic rate tax relief (20%) directly from HMRC and adds it to your pension pot. This means a £100 pension contribution only costs you £80 from your take-home pay. Higher and additional rate taxpayers can claim further relief through their Self Assessment tax return.
Salary Sacrifice
With salary sacrifice, you agree to give up part of your gross salary in exchange for an employer pension contribution. Because your contractual pay is reduced before tax and NI are calculated, you save income tax and National Insurance on the sacrificed amount — not just tax relief. This makes salary sacrifice the more tax-efficient option for most employees: a £100 pension contribution might only reduce take-home pay by around £68 for a basic rate taxpayer once NI savings are included.
The calculator above shows the net cost to you under each method so you can compare them directly against your take-home pay.