Most people glance at their payslip, check the bottom number, and move on. And fair enough — life is busy. But buried in those rows of numbers and codes is some really useful information about where your money actually goes every month. Knowing how to read your payslip properly can help you spot mistakes, plan your finances better, and understand exactly why your take-home pay is what it is.
In this guide, we will walk through a typical UK payslip from top to bottom and explain what each section means. No jargon, no confusion — just plain English.
The Top Section: Your Details and Pay Period
At the top of your payslip, you will normally see your name, employee number, and the pay period — for example, "Month 10" if you are paid monthly, or "Week 48" if you are paid weekly. The tax year runs from April to March, so Month 1 is April and Month 12 is March.
You will also usually see your employer's name and sometimes a department or location code. None of this affects your pay, but it is worth checking that the basics are right, especially if you have recently changed jobs or had a promotion.
Gross Pay: What You Earn Before Deductions
Your gross pay is the total amount you have earned before anything is taken off. This includes your basic salary plus any extras like overtime, bonuses, commission, or shift allowances.
If you are salaried, your gross pay will usually be the same each month — your annual salary divided by twelve. If you are paid hourly, it will vary depending on the hours you worked that period.
This is the number your employer agreed to pay you. Everything that comes off after this point is a deduction, and the money left at the end is what actually hits your bank account.
Your Tax Code: The Key to How Much Tax You Pay
Your tax code is one of the most important things on your payslip, and it is one of the things people most often overlook. For the 2025/26 tax year, the standard tax code is 1257L. That code tells your employer to give you a tax-free personal allowance of £12,570 for the year.
The number in the code represents your tax-free allowance — just multiply it by ten. So 1257 means £12,570. The letter "L" means you are entitled to the standard personal allowance.
Here are some other common codes you might see:
- BR: All your pay from this job is taxed at the basic rate (20%). This usually happens if you have a second job and your personal allowance is being used by your first employer.
- 0T: No personal allowance is being applied. This can happen if HMRC does not have enough information about you, or if your allowance has been fully used up.
- K: A K code means you owe more tax than your allowance covers — for example, because of benefits in kind like a company car. Instead of giving you a tax-free amount, your employer adds to your taxable income.
- S: You pay Scottish income tax rates.
- C: You pay Welsh income tax rates.
If your tax code looks wrong, it is worth checking with HMRC. A wrong tax code can mean you are paying too much or too little tax every single month. You can check and update your tax code through your personal tax account on the GOV.UK website, or use our tax code calculator to understand what your code means and whether it looks correct.
Income Tax: The Big Deduction
Income tax is usually the largest deduction on your payslip. It is calculated on your taxable income — that is, your gross pay minus your personal allowance.
For 2025/26, the rates are:
- 0% on the first £12,570 (your personal allowance)
- 20% on income between £12,571 and £50,270 (basic rate)
- 40% on income between £50,271 and £125,140 (higher rate)
- 45% on income above £125,140 (additional rate)
Your payslip usually shows two tax figures: the tax deducted this period and the cumulative tax deducted since the start of the tax year (April). The cumulative figure is useful for checking whether the right amount has been taken overall. If you have been on the wrong tax code for a few months, HMRC might adjust it later and you could see an unusually large or small deduction in one month to balance things out.
National Insurance Contributions
National Insurance is the second major deduction. It funds your state pension entitlement, the NHS, and certain benefits. Unlike income tax, NI does not have a personal allowance in the traditional sense, but you do not pay anything on earnings below the Primary Threshold.
For 2025/26:
- 0% on earnings up to £12,570 per year (the Primary Threshold)
- 8% on earnings between £12,570 and £50,270
- 2% on earnings above £50,270
Your NI category letter (usually "A" for most employees) determines which rates apply. You might see this letter on your payslip. Other categories exist for specific situations — for example, "H" for apprentices under 25 or "M" for employees under 21.
One thing to note: NI is calculated on a per-period basis, not cumulatively like income tax. So if you earn more in one month (because of a bonus, for example), you will pay more NI that month, and you cannot get it averaged out later. You can see the exact NI breakdown for your salary using our National Insurance calculator.
Pension Contributions
If you are auto-enrolled in a workplace pension (which most employees are), you will see a pension deduction on your payslip. The minimum contribution is 5% of your qualifying earnings, though some employers offer more generous schemes.
Depending on how your employer's pension scheme works, your contribution might be taken before or after tax:
- Net pay arrangement: Your pension contribution is taken from your gross pay before tax is calculated. This means you get tax relief automatically — you pay less income tax because your taxable income is lower.
- Relief at source: Your contribution is taken from your net pay, but only 80% comes from you. The pension provider claims the other 20% from HMRC as tax relief. So if £100 goes into your pension, you actually only pay £80.
Either way, putting money into your pension is one of the most tax-efficient things you can do. Every pound you contribute reduces your taxable income (or gets topped up by HMRC), which means your pension grows faster than if you saved the same amount in a normal bank account. Our pension calculator lets you see exactly how different contribution rates affect your take-home pay.
Student Loan Deductions
If you have a student loan, your repayment will also appear as a payslip deduction. It is labelled by your plan type — SL1 for Plan 1, SL2 for Plan 2, and so on. The amount depends on your earnings and which plan you are on.
Student loan repayments are calculated at 9% of everything you earn above your plan's threshold (or 6% for postgraduate loans). If your income drops below the threshold in any pay period, no deduction is made that month. Our student loan calculator can show you exactly what you will repay based on your earnings and plan type.
Other Deductions You Might See
Depending on your employer, you might also see deductions for:
- Childcare vouchers or salary sacrifice schemes — these reduce your gross pay in exchange for a benefit, which often saves you tax and NI.
- Overtime or shift allowances — extra pay that may push you into a higher tax bracket for that pay period.
- Cycle to work scheme — a monthly deduction for a bike purchased through your employer.
- Union subscriptions — if you are a member of a trade union.
- Private medical insurance — if your employer offers this as a taxable benefit, the cost might appear on your payslip.
- Attachment of earnings — court-ordered deductions for debts such as council tax arrears or child maintenance.
Net Pay: What You Actually Take Home
After all the deductions have been made, you are left with your net pay — the amount that actually lands in your bank account. This is the number most people care about, and rightly so.
It is worth remembering that your net pay can fluctuate from month to month even if your salary does not change. Things like tax code adjustments, bonus payments, pension changes, or student loan threshold shifts can all cause small variations.
Year-to-Date Totals
Most payslips include year-to-date figures showing how much you have earned and how much has been deducted since the start of the tax year. These are useful for checking that everything adds up over time and for filling in forms like mortgage applications, where lenders often want to see your YTD figures.
How to Spot a Mistake
Payslip mistakes are more common than you might think. Here are some things to watch out for:
- Wrong tax code. If it does not match what HMRC says it should be, contact your payroll department.
- Unexpected changes in deductions. If your tax or NI suddenly jumps without an obvious reason (like a pay rise or bonus), something might be wrong.
- Missing pension contributions. If your employer should be paying into your pension and it is not showing on your payslip, raise it immediately.
- Wrong student loan plan. If you are being deducted on the wrong plan, you could be overpaying. Check your plan type with the Student Loans Company.
If you think something is wrong, the first step is to talk to your employer's payroll team. If the issue is with your tax code, you can contact HMRC directly or update your details through your personal tax account.
The Bottom Line
Your payslip is not just a receipt — it is a snapshot of your entire financial relationship with your employer and the government. Taking five minutes to understand it properly can save you real money and help you spot problems before they add up.
Want to check whether the numbers on your payslip look right? Use our free salary calculator to see exactly what your take-home pay should be for your gross salary, including income tax, NI, pension, and student loan deductions.