PENSIONS · SALARY SACRIFICE
Salary Sacrifice Pension: How It Works, Benefits and Risks
Exchange part of your contractual cash salary for an employer pension contribution—and understand the real tax, National Insurance and employment consequences before deciding.
Last reviewed: September 2026.
Pension salary sacrifice can reduce the effect of pension saving on take-home pay. Ordinary pension contributions may already receive Income Tax relief, so the distinctive additional advantage is normally the employee National Insurance saving and any employer NI saving added to the pension.
See the current-year worked example ↓
What is pension salary sacrifice?
Pension salary sacrifice—also known as salary exchange—is an agreement between an employee and an employer. You agree to reduce your contractual entitlement to cash salary. In return, your employer pays an agreed amount into your workplace pension as an employer contribution.
Salary sacrifice is not something you can arrange independently through a personal pension. Your employer must offer it, and the change should be properly reflected in your employment terms and payroll.
Read the official HMRC salary-sacrifice guidance.
How can salary sacrifice reduce tax and National Insurance?
The portion of salary exchanged under an eligible pension salary-sacrifice arrangement is paid directly into the pension by the employer. This can mean lower earnings subject to PAYE Income Tax, lower earnings subject to employee National Insurance and lower employer National Insurance costs.
The actual saving depends on the tax and National Insurance rates that would otherwise apply to the exchanged salary. Someone exchanging income subject to a higher employee NI rate may receive a larger NI saving than someone exchanging income subject to a lower rate.
Is all the Income Tax relief an additional salary-sacrifice saving?
Not necessarily. Eligible pension contributions can normally receive Income Tax relief even if salary sacrifice is not used. The way this relief is provided depends on the pension arrangement.
Net pay arrangement
Your employer deducts the pension contribution before calculating Income Tax. National Insurance is normally still calculated using salary before the pension deduction.
Relief at source
The pension provider claims basic-rate tax relief and adds it to the pension. Someone paying tax above the basic rate may need to claim additional relief from HMRC.
Salary sacrifice
Contractual cash salary is reduced and the employer makes the pension contribution. Income Tax and National Insurance are normally calculated using the reduced cash salary.
The distinctive additional saving is usually National Insurance—not all the pension tax relief.
Read HMRC's guidance on pension tax relief.
Salary sacrifice compared with an ordinary workplace pension
| Feature | Salary sacrifice | Ordinary employee contribution |
|---|---|---|
| Who makes the contribution? | Employer | Employee and/or employer |
| Contractual cash salary reduced? | Yes | Normally no |
| Income Tax relief | Normally reflected through lower taxable pay | Net pay, relief at source or an HMRC claim |
| Employee NI saving | Usually available under current rules | Normally unavailable |
| Employer NI saving | Usually available to the employer | Normally unavailable |
| Could affect salary-based benefits? | Yes | Usually less likely |
Your employer might use terms such as salary exchange, SMART pension, SMART pay or pension salary sacrifice.
What are the advantages?
- Lower employee National Insurance: normally the clearest additional saving compared with an ordinary contribution receiving the correct tax relief.
- Simpler tax relief: exchanged salary is removed before PAYE Income Tax is calculated.
- Possible employer contribution boost: an employer may add some or all its NI saving to the pension, although it is not required to do so.
- Potential adjusted-net-income effect: a properly structured arrangement may affect calculations such as the Personal Allowance taper or High Income Child Benefit Charge.
What are the disadvantages and risks?
Your contractual cash salary is reduced
Ask whether your employer uses original reference salary or reduced cash salary when calculating pay rises, overtime, bonuses, redundancy payments, workplace life cover, employer pension contributions and statutory payments.
It may affect borrowing assessments
Some lenders consider original salary, while others focus on reduced cash pay, payslips or disposable income. If you expect to apply for a mortgage, ask how your employer reports salary and how the lender assesses salary sacrifice.
It may affect statutory payments and benefits
A lower cash salary can affect earnings-related payments or benefits, including Statutory Maternity Pay in some circumstances.
You may have less flexibility
Salary sacrifice changes contractual cash entitlement. A scheme might restrict when you can start, stop or amend it, although changes may be permitted after significant lifestyle events.
Your pension remains inaccessible
Money paid into a pension is intended for retirement and will normally remain unavailable until the applicable minimum pension age unless an exception applies.
Pension allowances still apply
Salary-sacrifice contributions count towards relevant pension allowances because they are employer contributions. A lower allowance may apply to some high earners or people who have flexibly accessed a defined-contribution pension.
Pay cannot fall below minimum wage
Employers must prevent salary sacrifice from reducing cash earnings below the applicable National Minimum Wage.
Does it affect employer contributions or student loans?
Some employers calculate their regular pension contribution using original reference salary. Others use pensionable pay, qualifying earnings or another definition. Confirm whether matching contributions continue and whether the employer shares its NI saving.
Salary sacrifice can also reduce earnings used for student or postgraduate loan deductions under current rules. A lower current repayment is not necessarily a permanent saving: depending on the balance and write-off terms, the loan could remain unpaid for longer.
Ten questions to ask your employer
- Does the employer offer pension salary sacrifice?
- Will it add any employer NI saving to the pension?
- Are regular employer contributions based on original or reduced salary?
- Are overtime, bonuses and pay rises based on original salary?
- Could statutory pay or workplace life cover be affected?
- How often can the contribution be changed?
- What happens during maternity, paternity or unpaid leave?
- What salary will appear on employment and mortgage references?
- Which pension charges and investment options apply?
- How will the legislated National Insurance change affect the scheme?
Is pension salary sacrifice worth it?
It may be attractive if your employer offers it, you intend to contribute anyway, important employment benefits use original reference salary, cash pay remains safely above minimum wage and the employer shares its NI saving.
It needs closer consideration if you expect to apply for a mortgage, may rely on earnings-related statutory payments, have already flexibly accessed a pension, are approaching an applicable allowance or need access to the money before retirement.
Do not compare salary sacrifice only with making no pension contribution. Compare it with your existing pension method and include the value of employer contributions.
Frequently asked questions and current rules
How much could pension salary sacrifice save in 2026/27?
Using 2026/27 rates, an employee earning £50,000 who exchanges £2,500 could save approximately £200 a year in employee National Insurance compared with an ordinary net-pay pension contribution. If the employer passed on its full NI saving, up to another £375 could be added to the pension.
| Annual result | Ordinary pension | Salary sacrifice |
|---|---|---|
| Pay used for NI | £50,000 | £47,500 |
| Employee NI | £2,994.40 | £2,794.40 |
| Take-home pay | £37,519.60 | £37,719.60 |
| Reaching the pension | £2,500 | £2,500 |
Actual payroll results can differ because of pay periods, tax codes, NI categories, Scottish Income Tax, bonuses and other deductions. Check HMRC's 2026/27 payroll rates and thresholds.
What is the pension annual allowance for 2026/27?
The standard pension annual allowance is £60,000. It generally includes employee, employer and salary-sacrifice contributions across private pensions. A lower allowance can apply to some high earners or people who have flexibly accessed a defined-contribution pension. Check the current HMRC annual-allowance guidance.
Is the £2,000 pension salary-sacrifice limit from April 2029 now law?
Yes. The National Insurance Contributions (Employer Pensions Contributions) Act 2026 received Royal Assent in April 2026. From April 2029, the first £2,000 a year of employee pension contributions made through salary sacrifice will retain the NI exemption; salary sacrifice above it will become subject to employee and employer NI.
The £2,000 amount is not a pension-contribution cap. The House of Lords proposed £5,000 and other exemptions, but the Commons rejected those amendments. Parliament can amend legislation in future, and further operational guidance is expected before implementation.
£2,000 is an NI-exempt amount—not a pension-contribution limit.
Read the UK Parliament stages, the Commons debate on the Lords amendments and the GOV.UK explanation.
Does salary sacrifice reduce taxable income?
Under a valid arrangement, contractual cash salary is reduced and PAYE Income Tax is normally calculated using the lower cash salary. The exchanged amount is paid into the pension by the employer.
Is salary sacrifice the same as pension tax relief?
No. Eligible pension contributions can receive Income Tax relief without salary sacrifice. Salary sacrifice changes contractual cash pay and can provide an additional National Insurance advantage under the current rules.
Does my employer have to give me its National Insurance saving?
No. An employer may retain the saving, share part of it or add all of it to the pension. Check the terms of the workplace scheme.
Can salary sacrifice reduce my pay below minimum wage?
No. An employer must restrict salary sacrifice so the employee's remaining cash earnings do not fall below the applicable National Minimum Wage.
Can salary sacrifice affect a mortgage application?
Yes. Some lenders may use the original reference salary, while others consider reduced cash pay, payslips and disposable income. Ask what the employer will show on a salary-reference letter and check the lender's assessment method.
Is salary sacrifice available to self-employed people?
Not in the same way. Salary sacrifice requires an employment relationship and a contractual exchange of cash salary for an employer-provided benefit.
The bottom line
Pension salary sacrifice can reduce the effect of pension saving on take-home pay, principally because eligible exchanged salary currently receives favourable National Insurance treatment.
A fair comparison should consider the additional employee NI saving, whether the employer shares its saving, existing employer contributions, salary-based benefits, pension-access restrictions and applicable allowances.
Ask your employer for a personalised payroll illustration, then use the simple MoneyMeasure pension calculator to estimate annual employee and employer contributions.