Most people glance at their take-home pay and ignore the rest. Understanding every line on your payslip tells you whether you're being taxed correctly — and reveals money you might be missing.
A payslip is a legal document that your employer must provide each time you're paid. Most people check only the bottom line. Here's what every section actually means.
Gross Pay: Your total earnings before any deductions. This includes your basic salary plus any overtime, bonuses, commission, or benefits in kind. Your gross pay is the figure used to calculate tax and National Insurance.
Net Pay: What actually hits your bank account. Gross pay minus all deductions.
Income Tax (PAYE): Collected by your employer via Pay As You Earn. Your tax code determines how much is deducted each month.
National Insurance (NI): Separate from income tax. Employee NI in 2024/25 is 8% on earnings between £12,570 and £50,270, then 2% above that. NI contributions build your entitlement to the State Pension and certain benefits.
Pension: Auto-enrolment contributions. The minimum is 5% employee + 3% employer = 8% total of qualifying earnings. Your payslip shows your contribution; your employer's contribution may appear separately or not at all (it still goes into your pot).
Student Loan: If applicable, deducted at source. Plan 2 (post-2012 England/Wales) repayments are 9% of income above £27,295/year.
Your tax code tells your employer how much tax-free income to give you each year. The most common code is 1257L — meaning a £12,570 personal allowance, the standard amount. Letters after the number indicate specific situations:
If your tax code is wrong, you could be overpaying or underpaying. Check it against your circumstances — HMRC's income tax checker tool lets you verify online.
Small errors in payroll are more common than most people realise. The tax office ultimately holds you responsible for underpayments even if your employer made the error, so periodic checking is genuinely worthwhile.