How Do I Read a Payslip?

Most people glance at the bottom figure and file the rest. That is understandable and it is also how payroll errors go unnoticed for months, because the only person positioned to spot most of them is you.

The three sections

Every payslip, whatever the layout, has the same structure.

Gross pay at the top. Your earnings for the period before anything is taken off. This includes basic salary, overtime, bonuses, commission and any taxable benefits. If you are paid hourly it will show the hours worked and the rate applied.

Deductions in the middle. Everything subtracted from gross pay, each on its own line.

Net pay at the bottom. What actually reaches your bank account. This is the only figure most people read.

Alongside these, most payslips carry a year-to-date column showing cumulative totals since the start of the tax year in April, plus your tax code, National Insurance number and payroll reference.

The deductions, one by one

Income tax, shown as PAYE. Calculated using your tax code, which tells your employer how much you can earn tax-free. Tax is worked out cumulatively across the year, so a month containing a bonus is taxed more heavily and subsequent months adjust downwards to compensate. This is why a large one-off payment appears to be taxed punitively and then partly corrects itself.

National Insurance. A separate deduction with its own thresholds and rates. Unlike income tax it is calculated on each pay period in isolation, so it does not even out across the year. Someone with wildly variable monthly earnings pays more National Insurance overall than someone with the same annual total paid evenly. It buys your State Pension entitlement and access to certain contributory benefits.

Pension contribution. Your share of the contribution. If your employer contributes too, that figure may appear on the payslip as information rather than as a deduction, since it is not coming out of your pay. Under auto-enrolment the minimum total is 8 percent of qualifying earnings, of which at least 3 percent must come from the employer.

Student loan. Deducted once earnings pass a threshold, at a percentage of the amount above it. The plan number shown matters a great deal, because the thresholds and repayment rates differ substantially between plans, and being on the wrong one is a common and expensive error.

Anything else. Season ticket loans, cycle-to-work schemes, salary sacrifice arrangements, union subscriptions, charitable giving through payroll, and court orders such as attachment of earnings.

The parts worth checking

The tax code

This is the single most valuable thing on the payslip to understand, because an incorrect code is common, costs you money silently, and will not be noticed by anyone else.

The standard code is 1257L for someone with one job and the full personal allowance. The number is the tax-free amount divided by ten; the letter describes the circumstances.

Codes that should prompt a closer look:

• BR means every pound is taxed at basic rate with no allowance applied. That is correct for a second job, where the allowance is used elsewhere, and wrong for a main one. On a single job it costs roughly 2,500 a year.
• D0 and D1 apply higher and additional rate to everything, for the same reason.
• A code ending in W1, M1 or X is an emergency code applied on a week-one or month-one basis, meaning it ignores what you have earned so far this year. Common for a month or two after starting a job, and it should correct itself once your record catches up.
• A number well below 1257 means something is reducing your allowance: an untaxed benefit such as a company car or medical insurance, an underpayment from a previous year being collected, or an adjustment you may not be aware of.

If a code looks wrong, contact HMRC rather than your employer. Employers apply the code they are given and have no authority to change it.

The year-to-date figures

These are what reconcile at year end, and they are the fastest way to spot a month where something went wrong. If year-to-date gross does not roughly match your monthly gross multiplied by the number of months elapsed, something is worth investigating. A missing month, a duplicated bonus or an unpaid leave period applied twice all show up here before they show up anywhere else.

Hours and days

For hourly and part-time staff this is where errors cluster. Check the hours paid against what you actually worked, particularly in months containing overtime, bank holidays, or unpaid leave. These are the periods where manual adjustments are made and manual adjustments are where mistakes live.

What is not a deduction

Employer National Insurance and employer pension contributions cost your employer money but never appear as deductions from your pay. Where they are shown at all it is for information. Some payslips display a total employment cost, which is genuinely useful context when comparing a salaried role against contracting or self-employment, because it reveals what you actually cost to employ.

Keeping them

Payslips are proof of income for mortgage applications, rental references, visa applications and benefit claims. Keep at least the last three months easily accessible and ideally a full year, along with the P60 issued after the tax year ends.

This matters more than it sounds, because employers are required to provide payslips but not to keep them available indefinitely, and payroll portals are routinely closed off the moment you leave a job. Download them while you still can.

A monthly habit worth thirty seconds

Look at three things: the tax code, the net figure against last month, and the hours paid. A change in any of them with no explanation is worth an email to payroll. Most payroll errors are small, recurring, and entirely fixable, but only once somebody notices them.