UK Tax & NI Guide
Salary Sacrifice Tax & National Insurance
Salary sacrifice can change the amount of cash salary subject to Income Tax and National Insurance, but the exact treatment depends on the arrangement and the benefit involved.
How Salary Sacrifice Affects Tax
To follow what salary sacrifice does to your tax position, it helps to be clear about five terms that are often used loosely.
- Gross contractual salary is the cash pay your employment contract entitles you to before any deductions.
- Taxable earnings are the part of that pay subject to Income Tax once your Personal Allowance has been applied.
- Salary sacrifice is an agreed change to your contract that reduces your entitlement to cash pay, usually in return for a non-cash benefit.
- Income Tax is charged through PAYE on your taxable earnings, band by band.
- Take-home pay is what remains after Income Tax, National Insurance and any other deductions.
The key point is that an effective salary sacrifice changes your contractual entitlement to cash pay. It is not a matter of money being pulled out of your wages at a convenient moment. Your contract is varied so that you are entitled to less cash and to a benefit instead, and payroll then operates on that new entitlement.
How HMRC describes it. HMRC explains that a valid salary sacrifice involves a reduction in the employee’s entitlement to cash pay, usually in return for a non-cash benefit. That wording matters. If the arrangement does not genuinely change what you are entitled to, it is not an effective salary sacrifice, and the expected tax treatment may not follow.
See HMRC’s guidance on salary sacrifice and the effects on PAYE.
Salary Sacrifice and Income Tax
Income Tax on employment income is collected through PAYE. Your employer works out the tax due on the pay you are contractually entitled to in each pay period and deducts it before you are paid.
Where a salary sacrifice is effective, the pay figure PAYE operates on is lower, so the taxable pay can be lower as well. How much difference that makes is not the same for everybody. It depends on your tax position: which band the sacrificed slice of salary would otherwise have fallen into, what your tax code is, whether you have other income, and where in the UK you are a taxpayer.
Two people sacrificing the identical amount can end up with quite different outcomes. Someone whose sacrificed pay would have been taxed at the basic rate sees a smaller reduction than someone whose sacrificed pay sat in a higher band.
England, Wales and Northern Ireland
These three use the same Income Tax bands and thresholds, set by the UK government. There are three main rates above the Personal Allowance.
Scotland
Scottish Income Tax is set separately by the Scottish Parliament and applies to the non-savings, non-dividend income of Scottish taxpayers. It uses six bands rather than three, with different rates and different thresholds. Scottish and rest-of-UK rates should never be mixed in the same calculation. National Insurance, by contrast, is UK-wide and identical everywhere.
2026/27 Income Tax Basics
The figures below are the published rates and thresholds for the 2026/27 tax year, which runs from 6 April 2026 to 5 April 2027.
| Band | Taxable income | Rate |
|---|---|---|
| Personal Allowance | Up to £12,570 | 0% |
| Basic rate | £12,571 to £50,270 | 20% |
| Higher rate | £50,271 to £125,140 | 40% |
| Additional rate | Over £125,140 | 45% |
These are simplified headline rates shown on the assumption of a standard Personal Allowance. Actual PAYE outcomes can depend on your tax code, other income and personal circumstances. The Personal Allowance is reduced by £1 for every £2 of income above £100,000 and reaches zero at £125,140.
| Band | Taxable income | Rate |
|---|---|---|
| Personal Allowance | Up to £12,570 | 0% |
| Starter rate | £12,571 to £16,537 | 19% |
| Basic rate | £16,538 to £29,526 | 20% |
| Intermediate rate | £29,527 to £43,662 | 21% |
| Higher rate | £43,663 to £75,000 | 42% |
| Advanced rate | £75,001 to £125,140 | 45% |
| Top rate | Over £125,140 | 48% |
These are Scottish Income Tax rates, applying to Scottish taxpayers only. They are shown on the assumption of a standard Personal Allowance, which is set UK-wide and is the same in Scotland. Source: GOV.UK, Income Tax in Scotland.
Salary Sacrifice and National Insurance
Employees pay Class 1 National Insurance on their earnings. Unlike Income Tax, there is no allowance applied first; instead there are thresholds, and the rate changes once earnings pass the Upper Earnings Limit.
| Threshold or rate | Annual figure | Applies to |
|---|---|---|
| Lower Earnings Limit | £6,708 | Builds State Pension record |
| Primary Threshold | £12,570 | Employee NI starts |
| Upper Earnings Limit | £50,270 | Rate drops above this |
| Employee main rate | 8% | Between PT and UEL |
| Employee upper rate | 2% | Above the UEL |
| Employer Secondary Threshold | £5,000 | Employer NI starts |
| Employer rate | 15% | No upper limit |
Standard category A figures. Different rates apply to some groups, such as employees under 21 and apprentices under 25.
Where an effective salary sacrifice reduces your contractual cash pay, National Insurance is worked out on that reduced figure. The size of the effect depends on where the sacrificed slice sat. If it fell between the Primary Threshold and the Upper Earnings Limit, the main rate applied to it. If it sat above the Upper Earnings Limit, only the much lower upper rate applied, so the National Insurance difference is far smaller.
Employer National Insurance is charged on the same earnings, with no upper limit, so a reduced salary can lower the employer’s liability too. That saving belongs to the employer, and what happens to it is a matter of employer policy.
Why Your Tax Saving Can Differ From Someone Else’s
Seven variables change the outcome, which is why headline percentages quoted online are rarely accurate for any specific person.
Salary Level
Determines which tax band and which National Insurance rate the sacrificed pay would have attracted. The same sacrifice behaves very differently at £30,000 and at £110,000.
Tax Region
Scottish taxpayers use six Income Tax bands rather than three, so the rate applied to the sacrificed slice can differ from the rest of the UK.
Tax Code
A non-standard code changes how much of your income is taxed and at what point. Codes reflecting untaxed income, benefits or adjustments will produce different PAYE results.
Student Loan
Repayments are based on earnings above a plan threshold. Which plan you are on, and whether your pay sits above that threshold, changes the total deduction.
Salary Sacrifice Amount
A larger sacrifice can span more than one band, so part of it may attract one rate and part another. The saving is not simply proportional.
Benefit Type
Tax treatment varies by benefit. Some benefits carry a separate benefit-in-kind charge that offsets part of the effect, and some fall under different rules entirely.
Employer Scheme
Scheme design matters: administration charges, whether employer National Insurance savings are shared, and how pensionable pay is defined all affect the real result.
Example: Salary Sacrifice and Take-Home Pay
An illustration of the salary adjustment, and what can be said about the tax position without knowing the individual’s circumstances.
where tax and NI savings apply
These figures are illustrative and are not a guaranteed saving. The salary adjustment itself is straightforward arithmetic. What happens next to Income Tax and National Insurance depends on the individual’s tax region, tax code, student loan position and the benefit received, so no single saving figure can be quoted for a £5,000 sacrifice in general.
Employee National Insurance vs Employer National Insurance
These are two separate liabilities on the same earnings, and they are frequently confused in online explanations.
Employee National Insurance
Charged on your earnings and deducted from your pay. Where an effective salary sacrifice reduces your contractual cash pay, the amount due is worked out on the reduced figure.
How much this changes depends on where the sacrificed pay sat relative to the Primary Threshold and the Upper Earnings Limit. Any reduction here does affect your take-home pay, because it is your own deduction.
Employer National Insurance
Charged on your employer, on your earnings, with no upper limit. Where your contractual pay falls, the employer may have a lower liability as a result.
This is the employer’s money, not yours. Some employers choose to share part or all of that saving, often by adding it to your pension. Others use it to fund the running costs of the scheme, and others retain it. It depends entirely on employer policy.
Employer National Insurance savings are not your take-home pay. You will sometimes see the employee and employer savings added together to produce a larger headline figure. That total is not money you receive. Our calculator shows the employer figure separately and never adds it to your take-home result.
Does Every Salary Sacrifice Benefit Get the Same Tax Treatment?
No
Tax treatment varies by benefit rather than being a single rule that applies to salary sacrifice as a category. HMRC notes that many benefits offered through salary sacrifice do not automatically receive the same tax advantages, and that specific exemptions and rules apply to certain benefits.
Pension contributions
The most widely offered arrangement. The sacrificed amount becomes an employer pension contribution, and no separate benefit-in-kind charge arises on the contribution itself.
Cycle to Work
Operates under its own conditions covering the hire of cycles and safety equipment. Scheme terms, package limits and end-of-hire arrangements are set by the provider and employer.
Electric vehicles
The vehicle is a company car and carries a benefit-in-kind charge in its own right, which sits alongside the salary reduction rather than being cancelled out by it.
Other benefits
Treatment varies considerably. Some benefits are taxed on the greater of the salary given up or the benefit’s value, which removes the advantage that a sacrifice might otherwise produce.
Why this changed. Optional remuneration arrangement rules introduced from April 2017 removed the tax and National Insurance advantages for many benefits provided through salary sacrifice. A limited set of benefits was kept outside those rules, which is why pensions, cycle to work and ultra-low emission vehicles are still commonly offered while many other benefits are not.
Salary Sacrifice and Benefits in Kind
A benefit in kind is something of value your employer provides that is not cash pay. Where a benefit is taxable, it is given a value for tax purposes and that value is treated as income, so Income Tax is due on it even though no money changed hands.
This is where electric vehicle schemes are often described inaccurately. An EV provided through salary sacrifice is a company car, and a company car is a taxable benefit. The appropriate percentage for fully electric cars is low compared with petrol and diesel, and it is scheduled to rise in later tax years, but it is not nil.
Two separate things, not one
- The salary sacrifice tax and NI effect. Your contractual cash pay falls, so the Income Tax and National Insurance calculated on that pay can fall too.
- The benefit-in-kind tax. A separate charge on the taxable value of the benefit you receive, added to your income and taxed at your marginal rate.
The net position is the first minus the second. For an electric car the first is usually larger than the second, which is why these schemes remain popular, but the outcome depends on the list price of the car, the amount sacrificed and your own tax position.
EV salary sacrifice is not tax free. It is a taxable benefit with a comparatively low charge. Any description that leaves out the benefit-in-kind element is incomplete. Our salary sacrifice calculator includes the benefit-in-kind charge in the electric vehicle mode so the figure you see is the net position.
Salary Sacrifice and Student Loans
Student loan repayments collected through payroll are based on an earnings figure, and a salary sacrifice can affect the earnings figure used for some student loan repayment calculations, depending on the arrangement and the repayment rules that apply to your plan.
In practical terms, a lower earnings figure can mean a smaller repayment deducted each pay period. That is a cash-flow effect rather than a reduction in what you owe: the outstanding balance remains, and interest continues to be applied under the rules of your plan. Whether that trade-off suits you is a personal judgement and depends on your plan type, your balance and how long you expect to be repaying.
Use the calculator for an estimate, then check your payroll information if the result is important.
Other Ways Salary Sacrifice Can Affect You
HMRC notes that salary sacrifice can affect some earnings-related and contribution-based benefits. Because these depend on how your employer calculates things, none of the following applies automatically.
Pension calculations
Some schemes define pensionable pay as your reduced salary and others use the pre-sacrifice figure. This matters most in defined benefit schemes, where benefits are built from pensionable pay.
Statutory payments
Statutory sick, maternity, paternity and adoption pay are calculated from average earnings. A reduced salary during the relevant period can affect the amount payable.
State Pension and NI record
Qualifying years depend on your National Insurance record. If a sacrifice takes earnings below the Lower Earnings Limit, that year may not count towards the State Pension.
Mortgage and affordability
Lenders generally assess affordability on contractual salary, which is the reduced figure. Some add certain sacrificed amounts back, but policies differ between lenders.
Other earnings-related benefits
Life cover, income protection, redundancy pay, overtime rates and percentage pay rises are often calculated from contractual salary, so a lower base can carry through to each of them.
Check your scheme documents. Whether and how each of these is affected is determined by your employer’s scheme rules, not by a general standard. Ask your payroll or HR team for the documentation before agreeing to an arrangement.
Important 2029 Pension Salary Sacrifice Change
National Insurance treatment of pension salary sacrifice is changing
The UK government has announced changes affecting the National Insurance treatment of pension contributions made through salary sacrifice from 6 April 2029.
The announced measure introduces a £2,000 annual amount of employee pension salary sacrifice contributions that remains exempt from National Insurance, with contributions above that amount subject to the relevant National Insurance treatment for both the employee and the employer. Employees can still sacrifice more than £2,000 into a pension; it is the National Insurance exemption that is capped, not the contribution. Ordinary employer pension contributions are not affected.
The measure was announced at the Autumn Budget 2025 and the enabling legislation, the National Insurance Contributions (Employer Pensions Contributions) Act 2026, received Royal Assent on 29 April 2026. Detailed rules are to be set out in regulations, so the operational detail may still develop before the start date.
This does not apply to the 2026/27 tax year. The change takes effect from 6 April 2029. Our calculator uses 2026/27 rules only and does not apply the £2,000 cap.
Official guidance: Salary sacrifice reform for pension contributions on GOV.UK.
How Our Calculator Estimates Your Result
The calculator runs your figures twice, once on your current salary and once after the sacrifice, then reports the difference.
- Gross salary. Your annual contractual pay before any deductions.
- Salary sacrifice. The amount of gross salary given up, entered annually or monthly.
- Adjusted cash salary. Gross salary less the sacrifice. This becomes the basis for the PAYE calculation.
- Income Tax. Applied band by band using your selected tax region, after the Personal Allowance and any taper.
- Employee NI. Class 1 contributions on the adjusted earnings, using the Primary Threshold and Upper Earnings Limit.
- Student loan if selected. A percentage of earnings above the threshold for your chosen plan.
- Estimated take-home pay. Adjusted salary less Income Tax, employee National Insurance and any student loan repayment.
- Difference before and after sacrifice. Each figure is compared against the same calculation on your original salary.
Your actual payroll calculation may differ. The calculator uses standard annual PAYE assumptions and a standard tax code. It cannot account for a non-standard tax code, multiple jobs, other income, mid-year changes, other taxable benefits, or the specific rules of your employer’s scheme.
Frequently Asked Questions
Does salary sacrifice reduce Income Tax?
It can. Where the arrangement is an effective salary sacrifice, your contractual cash pay is lower, so PAYE operates on a lower figure and less Income Tax can be due. How much difference this makes depends on which band the sacrificed pay would otherwise have fallen into, your tax code and your tax region. If the benefit you receive is itself taxable, a benefit-in-kind charge arises that offsets part of the effect.
Does salary sacrifice reduce National Insurance?
Employee Class 1 National Insurance is charged on earnings, so reducing contractual cash pay can reduce it. The size of the effect depends on where the sacrificed amount sat. Earnings between the Primary Threshold and the Upper Earnings Limit attract the 8% main rate, while earnings above the Upper Earnings Limit attract only 2%, so an identical sacrifice produces a much smaller National Insurance change for a high earner.
How much tax can I save through salary sacrifice?
There is no single figure. The outcome depends on your salary level, tax region, tax code, student loan plan, the amount sacrificed, the benefit type and your employer’s scheme design. Percentages quoted online are averages rather than results for any specific person. The salary sacrifice calculator works out an estimate from your own figures.
Does salary sacrifice reduce take-home pay?
Usually yes, because you are receiving less cash salary. However, the reduction is typically smaller than the amount sacrificed, since Income Tax and National Insurance would have been deducted from that money in any case. Where a benefit carries a benefit-in-kind charge, the reduction is larger than the tax and National Insurance effect alone would suggest.
Is salary sacrifice tax free?
No. It is not accurate to describe salary sacrifice as tax free. The salary you give up is no longer paid to you as cash, so it is not taxed as cash pay, but the benefit you receive instead may itself be taxable. An electric car provided through salary sacrifice, for example, is a company car with a benefit-in-kind charge. Pension contributions are treated differently again, and remain subject to pension rules and allowances.
Does salary sacrifice affect employer NI?
It can. Employer National Insurance is charged on your earnings with no upper limit, so a reduced contractual salary can lower the employer’s liability. That saving belongs to the employer. Some employers pass part or all of it into your pension, some use it to fund the scheme, and some retain it. It should never be counted as part of your own take-home saving.
Does salary sacrifice affect student loan repayments?
It can affect the earnings figure used for some student loan repayment calculations, depending on the arrangement and the rules for your plan. A lower earnings figure can mean a smaller deduction each pay period. The balance still stands and interest continues to apply, so a smaller monthly deduction means the loan is repaid more slowly.
Does salary sacrifice work differently in Scotland?
The mechanism is the same, but the Income Tax outcome can differ. Scotland has six Income Tax bands running from 19% to 48%, set by the Scottish Parliament, rather than the three bands used in England, Wales and Northern Ireland. The rate that would have applied to your sacrificed pay therefore depends on where you are a taxpayer. National Insurance is UK-wide and identical everywhere.
Does salary sacrifice affect pension contributions?
Under a pension salary sacrifice arrangement, the amount you give up is paid in as an employer contribution rather than an employee one. Some schemes define pensionable pay using your reduced salary, which can affect how other entitlements are calculated, particularly in defined benefit schemes. Pension annual allowance rules continue to apply. Check your scheme rules, and see how salary sacrifice works for more detail.
Can salary sacrifice affect statutory payments?
It can. Statutory sick pay, maternity, paternity and adoption pay are calculated from average earnings, so a reduced salary during the relevant period may affect the amount payable. Many employers pause sacrifice arrangements around parental leave, but this is a matter of employer policy rather than an automatic rule. Ask your payroll or HR team how your scheme handles it.
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Important Information
This page provides general information for educational purposes. Tax and National Insurance treatment depends on your circumstances, employer arrangement and the type of benefit. It is not financial or tax advice.