How to read your payslip line by line

Gross pay: the starting point for everything

Gross pay is your total earnings for the period before any deductions, including your base salary, plus any overtime, bonuses or commission paid in that specific pay run. Every other figure on the payslip is calculated from this number.

If you're paid hourly, gross pay for the period is your hours worked multiplied by your rate, plus any additional payments. Checking this figure against your own record of hours worked is the single most useful habit for catching payroll errors early.

Our hourly wage calculator is useful here if you want to sanity-check what a given number of hours at your rate should produce before deductions, especially if your hours vary from period to period.

Tax code and PAYE

Your tax code appears somewhere near the top of most payslips and determines how much of your gross pay is tax-free before income tax is calculated on the rest. A standard code like 1257L reflects the normal personal allowance split across the year.

The income tax line itself shows how much has been deducted for that specific period, calculated cumulatively across the tax year in most cases, which is why it can look slightly different across otherwise similar months if your year-to-date position shifts.

If this figure looks unusually high or low compared with previous months without an obvious reason, like a bonus or a pay rise, it's worth checking your tax code hasn't changed unexpectedly.

National Insurance contributions

National Insurance appears as a separate line from income tax and is calculated per pay period rather than cumulatively, using its own thresholds. For most employees this is currently 8% of earnings within the main band, with a lower rate above the upper earnings limit.

Because it resets each period rather than accumulating like tax, a one-off high-earning month, such as one including a bonus, can produce a noticeably different National Insurance deduction than your typical monthly figure, without anything being wrong.

This is one of the more commonly misunderstood lines on a payslip, and checking it against an income tax calculator that includes National Insurance can quickly confirm whether the figure looks right for your salary.

Pension contributions

Most employees are automatically enrolled into a workplace pension, and your contribution appears as a separate deduction, often alongside your employer's own contribution shown for information even though it isn't taken from your pay.

If your pension runs through salary sacrifice, your gross pay figure may already reflect the reduction, which affects the tax and National Insurance calculated on the rest of your payslip, so the arrangement can look slightly different depending on how your employer has set it up.

It's worth checking the percentage matches what you agreed to, especially after a pay rise, since some schemes calculate contributions as a percentage of your new salary automatically while others need to be manually updated.

Student loan deductions

If you have a student loan, it appears as its own line, calculated as 9% of your earnings above the relevant threshold for your plan, taken per pay period rather than smoothed across the year.

If you have both an undergraduate and postgraduate loan, you may see two separate lines, each calculated against its own threshold, which is normal rather than an error, though it's worth confirming both match your online loan account occasionally.

This deduction fluctuates with your pay in the same way National Insurance does, so a bonus month can produce a larger than usual student loan deduction without anything having changed about your loan itself.

Other common deductions

Beyond tax, National Insurance and student loans, payslips sometimes show other deductions like union subscriptions, charitable giving through payroll giving schemes, or repayments for things like a season ticket loan or a cycle-to-work scheme.

These are usually fixed amounts agreed separately from the tax system, so they should stay consistent month to month unless you've changed the arrangement, making them easy to check by comparing against previous payslips.

If an unfamiliar deduction appears, it's worth asking payroll directly rather than assuming it's correct, since occasionally deductions are set up for the wrong employee or continue after an arrangement, like a loan, should have ended.

Year-to-date figures

Most payslips include a year-to-date column showing your cumulative gross pay, tax, National Insurance and other deductions since the start of the tax year in April. This is genuinely useful for checking your overall trajectory rather than just one period in isolation.

If you change jobs partway through the year, your new employer needs your year-to-date figures from your P45 to calculate tax correctly on a cumulative basis, so it's worth keeping that document safe until your first payslip at the new job looks right.

Comparing year-to-date net pay against a rough annual estimate from an income tax calculator is a useful way to spot if something has drifted off over several months rather than in one obvious jump.

Net pay: what actually lands in your account

Net pay is what's left after every deduction, and it's the figure that should match what actually appears in your bank account for that pay period, allowing for the payment date shown on the payslip.

If net pay doesn't match your bank statement, the first thing to check is the payment date and whether any other deductions, like a savings transfer set up separately from payroll, might explain the difference before assuming there's a payroll error.

Keeping payslips somewhere accessible, even after they've been checked, makes things considerably easier later on for mortgage applications, tax queries or simply understanding your own pay history over time.

What to do if something looks wrong

If a figure on your payslip doesn't match your expectations, the first step is comparing it against the previous month's payslip and identifying exactly which line has changed, rather than assuming the whole thing is wrong.

Payroll teams deal with tax code changes, pension adjustments and student loan updates regularly, so a specific, well-described query, ideally referencing the exact line and figure, tends to get resolved faster than a general complaint that something feels off.

For genuinely complex situations, particularly around tax codes or emergency tax after a job change, it's worth contacting HMRC directly as well as payroll, since some corrections need to come from HMRC's own records rather than the employer alone.

Common questions

Why does my payslip show a different net pay each month?

This is often normal, caused by variable hours, bonuses, or the way National Insurance and student loan repayments are calculated per period rather than smoothed evenly. Comparing which specific line has changed against a previous payslip usually explains the difference.

What does the tax code on my payslip actually mean?

It tells your employer how much of your pay is tax-free before income tax applies, with the number typically reflecting your personal allowance and the letter indicating any adjustments. A standard 1257L code reflects the normal 2025/26 personal allowance with no special adjustments.

Should my payslip show employer pension contributions?

Many payslips show the employer's pension contribution for information, even though it's not deducted from your pay and doesn't affect your net pay figure. Not all employers include this, so its absence isn't necessarily a problem.

Why is my payslip different from a colleague's on the same salary?

Differences in tax code, pension contribution rate, student loan plan, or benefits in kind can all produce different net pay even at an identical gross salary. It's rarely useful to compare payslips directly without knowing all of these underlying details.

How long should I keep my payslips?

It's generally sensible to keep payslips for at least a year, and many people keep them longer for mortgage applications or tax queries. Digital copies from an employer payroll portal are usually just as valid as paper ones if you need to provide evidence later.

Tools for this

• Income Tax Calculator
• Hourly Wage Calculator