Guide

How Does Salary Sacrifice Work? UK Guide 2026/27

Written by James Whitfield · Updated August 2026 · Checked against 2026/27 HMRC rates.

Salary sacrifice, also called salary exchange, is a formal change to your employment contract.1 You agree with your employer to give up part of your gross salary in exchange for a non-cash benefit. Because your gross pay is lower, you pay less income tax and National Insurance. This page explains the mechanics, the numbers and the key rules for 2026/27.

Key takeaways
  • You swap gross salary for a benefit, so PAYE tax and NI are both charged on a lower figure.34
  • A £35,000 earner sacrificing £2,400 saves £672 in tax and NI — the £2,400 pension top-up nets £1,728.34
  • Higher-rate taxpayers save 42p per £1 sacrificed; basic-rate savers save 28p.4
  • It's a contract change, not a payslip deduction — it must be set up through your employer.1
  • Watch the guardrails: minimum wage, the £60,000 annual allowance and mortgage affordability.2

The basic mechanism

Salary sacrifice works at the gross salary level. Your employer records a lower contractual gross, and your payslip shows that reduced figure as the starting point before tax and NI. The sacrificed amount goes directly to the benefit provider, usually the pension scheme, as an employer contribution.5

PAYE income tax and employee NI are both calculated on gross pay.3 A lower gross means less of both. That is the core saving. A standard personal pension contribution doesn't work this way — it comes from net pay and only saves income tax, not NI. Salary sacrifice saves both.

What qualifies for salary sacrifice?

HMRC permits salary sacrifice for these benefits:

  • Pension contributions, the most common and most valuable use. No benefit-in-kind tax applies.
  • Electric vehicles (company cars), benefit-in-kind tax applies at just 4% of P11D value in 2026/27, making this highly tax-efficient.
  • Cycle-to-work equipment, bikes and qualifying safety accessories. No BIK tax. Employer purchases and hires to you.
  • Technology packages, phones, laptops in some schemes.
  • Annual leave purchase, some employers allow extra holiday via salary sacrifice.

Childcare vouchers closed to new entrants in October 2018. Cash and cash-equivalent vouchers are not permitted under salary sacrifice rules at all.

Worked example: £35,000 salary, £2,400 pension sacrifice

An employee earns £35,000 and sacrifices £2,400 per year (£200 per month) into their workplace pension. Here is exactly what changes:

Item Before sacrifice After sacrifice
Gross salary (PAYE)£35,000£32,600
Income tax (20%)£4,486£4,006
Employee NI (8%)£1,794£1,602
Tax & NI saving—£672 / year
Net cost of £2,400 pension contribution—£1,728 / year (£144/mo)

The employer also saves 15% × £2,400 = £360 in NI, which many employers pass back to the employee's pension as additional contribution.

Worked example: £40,000 salary, £3,000 sacrifice

All £3,000 sits in the basic-rate tax (20%) and main NI (8%) band.

  • Income tax saving: 20% × £3,000 = £600
  • Employee NI saving: 8% × £3,000 = £240
  • Total personal saving: £840 per year
  • Net monthly cost: (£3,000 − £840) ÷ 12 = £180/month instead of £250/month
  • Employer NI saving: 15% × £3,000 = £450 per year

Worked example: £55,000 salary, higher-rate taxpayer

Salary of £55,000. Sacrifice £4,730, the amount above the £50,270 threshold. The entire sacrifice falls in the 40% tax / 2% NI zone.

  • Income tax saving: 40% × £4,730 = £1,892
  • Employee NI saving: 2% × £4,730 = £94.60
  • Total saving: £1,986.60 per year
  • Net cost of £4,730 sacrifice: £2,743.40 per year (£228.62/month)

Higher-rate taxpayers save 42p per pound versus 28p for basic-rate. The saving is much larger because the income tax rate is double.

Important rules and limits

  • National Minimum Wage: Your post-sacrifice cash salary must not fall below the NMW for your age. For those aged 21+ in 2026/27, NMW is £12.71/hour (approximately £23,600 full-time annual equivalent).
  • Formal contract amendment required: Salary sacrifice must be documented as a change to your employment contract, it cannot be informal or ad hoc.2
  • Pension annual allowance: Total pension contributions (employee + employer + sacrifice) must not exceed £60,000 per year or 100% of earnings. Most employees are well below this.
  • Mortgage affordability: Lenders may base affordability on post-sacrifice contractual salary. Consider timing if you are about to apply for a mortgage.
  • Statutory pay: SMP, SPP and SSP are calculated on pre-sacrifice salary in most cases, but check your employer's specific scheme rules.

How to set it up with your employer

  1. Check your employer operates a salary sacrifice scheme (ask HR or payroll).
  2. Find out the available change windows, most schemes allow changes once or twice per year.
  3. Complete the salary sacrifice agreement specifying the benefit type and amount.
  4. Confirm the change appears on your first payslip as a reduced gross salary and an employer pension/benefit contribution.
  5. Ask HR whether the employer passes on any NI saving as additional pension contribution ("NI passthrough").

Frequently asked questions

Is salary sacrifice the same as a pension deduction on my payslip?

No. A normal pension deduction (relief at source or net pay) comes out of a salary that stays the same on paper. Salary sacrifice actually lowers your contractual gross, so income tax and National Insurance are calculated on the smaller figure. That NI saving is the difference that makes sacrifice more efficient for employees.

How much can I save with salary sacrifice?

Roughly 28p per £1 sacrificed at basic rate (20% tax + 8% NI) and 42p at higher rate (40% tax + 2% NI). On a £3,000 sacrifice a basic-rate employee saves about £840. If your employer passes on their 15% NI saving, the effective benefit is larger still.

Can I set up salary sacrifice myself?

No. It's a change to your employment contract, so it has to be arranged through your employer's scheme. Ask HR or payroll whether they run one, complete the salary sacrifice agreement, and check your next payslip shows the reduced gross and the employer contribution.

Does salary sacrifice reduce my take-home pay?

Yes, but by less than the amount sacrificed, because you keep the tax and NI you would otherwise have paid. On a £2,400 pension sacrifice at £35,000, take-home falls by about £1,728 a year (£144 a month) while £2,400 goes into your pension.

Are there limits on how much I can sacrifice?

Two main ones. Your remaining cash pay can't fall below the National Minimum Wage (£12.71/hour for age 21+ in 2026/27), and total pension contributions can't exceed the £60,000 annual allowance (or 100% of earnings if lower) without a tax charge. Most employees are comfortably within both.

Calculate your exact saving

Use our pension salary sacrifice calculator to enter your exact salary and sacrifice amount and see income tax saving, NI saving and net monthly cost. Or try the main calculator for pension, EV, cycle to work and bonus scenarios.

See also: Salary sacrifice vs relief at source, Guide for higher-rate taxpayers, Pension salary sacrifice guide

Figures reviewed for the 2026/27 tax year (last updated July 2026). Source: GOV.UK.

Sources & references

Every headline figure in this guide is checked against the official HMRC and GOV.UK pages below and reflects the confirmed 2026/27 tax year. Each link opens the relevant official page in a new tab.

  1. Salary sacrifice and the effects on PAYE (HMRC) ↗ https://www.gov.uk/guidance/salary-sacrifice-and-the-effects-on-paye
  2. HMRC EIM42750: salary sacrifice arrangements ↗ https://www.gov.uk/hmrc-internal-manuals/employment-income-manual/eim42750
  3. National Insurance rates and categories ↗ https://www.gov.uk/national-insurance-rates-letters
  4. Income Tax rates and Personal Allowances ↗ https://www.gov.uk/income-tax-rates
  5. Workplace pensions ↗ https://www.gov.uk/workplace-pensions
Verified against published UK government guidance.