UK salary & payroll glossary

Plain-English definitions of the terms that appear on UK payslips and salary calculations. Every entry is verified against HMRC and gov.scot sources and reviewed at least every six months.

Verified against HMRC and gov.scot official sources · Last reviewed May 2026

Terms (17)

Annual allowance

The maximum amount you can contribute to UK pensions each tax year and still receive tax relief — £60,000 in 2026/27, with tapering for incomes above £260,000.

BR tax code

A UK tax code that taxes all income from this source at the basic rate of 20%, with no personal allowance applied.

Gross pay

Your total pay before any deductions for tax, National Insurance, pension or student loan are taken out.

K tax code

A UK tax code starting with K that signals a negative allowance — extra taxable income is being added to your pay, rather than allowance being given.

Marginal tax rate

The combined Income Tax and National Insurance rate that applies to the next pound you earn — distinct from your average (effective) tax rate.

National Insurance

A tax on UK earnings paid by employees, employers and the self-employed, used to fund state benefits and the State Pension.

Net pay arrangement

A UK pension contribution mechanism where the contribution is deducted from gross pay before Income Tax is calculated. Confusingly named — it's about pension method, not your overall net pay.

Net pay

Your take-home pay — what's left after Income Tax, National Insurance, pension contributions, student loan and any other deductions are taken from your gross salary.

PAYE

The UK system through which employers deduct Income Tax and National Insurance from employees' pay before paying it to them.

Pension contribution

Money paid into a UK pension scheme by you, your employer, or both — eligible for tax relief at your marginal rate, up to the annual allowance of £60,000.

Pension tax relief

The tax benefit on UK pension contributions, given at your marginal Income Tax rate. Delivered via three mechanisms: salary sacrifice, net pay arrangement, or relief at source.

Personal allowance

The amount you can earn each tax year before paying any UK Income Tax — £12,570 in 2026/27, frozen until April 2031.

Relief at source

A UK pension contribution mechanism where contributions come from your take-home pay and the provider reclaims basic-rate (20%) tax relief from HMRC on your behalf.

Salary sacrifice

An arrangement where you give up part of your gross salary in exchange for a non-cash benefit (most commonly pension contributions), reducing your Income Tax and National Insurance.

Tapered annual allowance

A reduced pension annual allowance for high earners — kicks in above £260,000 of adjusted income, reducing the standard £60,000 allowance down to £10,000 at £360,000.

Tax code

A short code on your payslip that tells your employer how much tax-free Personal Allowance to apply to your pay each period.

Workplace pension

A pension scheme arranged by your employer that you're automatically enrolled into under UK auto-enrolment rules. Statutory minimums in 2026/27: 5% employee + 3% employer of qualifying earnings.

How we maintain this glossary

Every term on this page links to a dedicated definition page with the source, a worked example where relevant, and the calculators that use the term. We add new terms when they appear at least twice across our calculator pages or editorial articles — and we keep the list focused rather than exhaustive, so each definition earns its space.

The glossary is one of several editorial systems on PaySlipCheck. See our salary library for in-depth articles, our methodology for how we calculate every figure, and our editorial standards for how the team works.

Disclaimer: This page provides general information based on published HMRC and gov.scot figures. It is not personal tax or financial advice. For your specific situation, please consult a qualified accountant or contact HMRC directly.