Salary Sacrifice Pension Calculator
See the real cost to your take-home pay, the tax and National Insurance you save, and exactly how much lands in your pension.
Every £1 from your pay puts £1.39 into your pension.
- Income tax saved£1,000
- National Insurance saved£400
- Employer NI added£0
Estimates for the 2026/27 tax year (England, Wales & Northern Ireland). For guidance only, not financial advice. Your scheme, tax code and pension rules may change the figures.
What Is Pension Salary Sacrifice in the UK?
Pension salary sacrifice — also called salary exchange — is an arrangement where you agree to give up part of your gross salary. Instead of that money landing in your bank account and then being transferred to your pension, your employer pays it directly into your pension pot before tax is calculated.
The result: you pay income tax and National Insurance on a lower gross salary. Your employer also pays less in National Insurance contributions.
HMRC approves this arrangement. It is not a loophole. It has been a mainstream way of making pension contributions for decades — used by employers from large FTSE companies down to small businesses across the UK. If you have not checked whether your employer offers it, it is worth asking. If they do and you are not using it, you are almost certainly paying more tax than you need to.
One thing to get clear from the start: salary sacrifice is not the same as a standard employee pension contribution. The mechanics differ in a way that changes the numbers, sometimes significantly.
2026/27 Key Figures
England, Wales & Northern Ireland. Scotland uses different income tax bands.
How Does Salary Sacrifice (Salary Exchange) Work?
When you make a normal personal pension contribution, your salary stays the same and the money comes out of your net pay after HMRC has taken income tax and National Insurance. You get basic-rate income tax relief added back by the pension provider, but you still pay full National Insurance on the original amount.
With salary sacrifice, that order reverses. Your contractual gross salary is reduced first. Income tax, employee National Insurance, and employer National Insurance are all calculated on this lower figure. The pension contribution is then paid by your employer directly into your scheme.
Here is a straightforward illustration for a basic-rate taxpayer earning £40,000 in 2026/27, sacrificing £200 per month (£2,400 per year):
| Item | Before Sacrifice | After Sacrifice | Difference |
|---|---|---|---|
| Gross salary | £40,000 | £37,600 | ‑£2,400 |
| Income tax | £5,486 | £5,006 | Save £480 |
| Employee NI | £2,194 | £2,002 | Save £192 |
| Pension contribution | £0 | £2,400 | +£2,400 |
| Take-home pay | £32,320 | £30,592 | ‑£1,728 |
| Net cost to employee | — | £1,728 | Not £2,400 |
That £2,400 going into the pension pot cost £1,728 in reduced take-home pay. The remaining £672 comes from income tax and National Insurance that is no longer due. On top of that, the employer saves 15% employer NI on the sacrificed amount — £360 in this example. Many employers pass some or all of that saving into the employee's pension, which reduces the net cost further.
The agreement is set out as a change to the employment contract. Your contractual salary is genuinely reduced for tax purposes. This matters if you are applying for a mortgage or claiming certain state benefits — both covered further down this page.
Pension Salary Sacrifice Calculator for 2026/27
The calculator at the top of this page uses 2026/27 HMRC tax rates and National Insurance thresholds. Enter your gross salary, choose a percentage or fixed amount to sacrifice, and see your take-home pay before and after — alongside the income tax and NI saving, the pension contribution, and the employer NI saving if your employer passes it on.
Results are estimates for illustrative purposes. Your actual figures depend on your specific payroll, pension scheme type, and personal circumstances. For personalised advice, speak to a tax adviser or accountant.
Calculate Your Pension Contribution and Take Home Pay
The calculator lets you enter either a percentage of salary or a fixed amount. Both work, but they suit different situations.
A percentage scales automatically if your pay varies — useful if you receive a variable allowance or if your salary changes year to year. A fixed amount gives you predictability: you know exactly what goes into the pension each month and exactly what your take-home pay will be.
The key figure to look at is the net cost — how much your take-home pay actually drops versus how much lands in the pension. Here is how that works at different tax rates:
| Tax Rate | Pension Contribution | Income Tax Saved | Employee NI Saved | Net Cost to Pay |
|---|---|---|---|---|
| Basic rate (20%) | £1,000 | £200 | £80 | £720 |
| Higher rate (40%) | £1,000 | £400 | £20 | £580 |
| Additional rate (45%) | £1,000 | £450 | £20 | £530 |
The higher your marginal tax rate, the less each pound of pension contribution costs you from your take-home pay. The calculator shows these figures for your specific salary and sacrifice amount.
Student loan repayments are also affected. Plans 1, 2, and 5 are all calculated on gross pay. Salary sacrifice reduces your gross salary before student loan deductions apply — so if you are near a repayment threshold, the sacrifice may reduce or stop your monthly student loan repayments, further lowering the net cost.
Estimate Your NI Savings and Income Tax Benefits
National Insurance is the part of salary sacrifice that often surprises people — particularly those who compare it to making contributions from net pay.
20% income tax + 8% employee NI on each £1 sacrificed
40% income tax + 2% employee NI above £50,270
45% income tax + 2% employee NI above £125,140
On top of the employee saving, the employer NI saving is 15% of the sacrificed amount. On a £5,000 annual sacrifice, that is £750 back in the employer's hands. Some employers keep it. Many — particularly larger employers — pass it on as an enhanced employer pension contribution. That is worth asking HR about directly. If your employer adds their NI saving to your pension, the effective value of every pound you sacrifice increases further.
With a standard relief at source pension, you pay full employee NI on your salary and contribute from what is left. You get income tax relief back, but not the NI. With salary sacrifice, your gross pay is reduced before NI is calculated — so you save both. That distinction is where the real advantage sits.
How Salary Sacrifice Pension Contributions Can Boost Your Pension
The pension pot impact of salary sacrifice goes well beyond the basic contribution amount. There are three layers worth understanding — each one adding value on top of the last.
Employer NI pass-through
If your employer passes their NI saving into your pension, you get an immediate uplift. For every £1 you sacrifice, £1.15 goes into the pension — your £1 plus the employer's 15p NI saving. That uplift compounds over time, and it costs neither you nor your employer anything extra. Ask your HR team whether your scheme does this.
The £100k personal allowance taper
If your adjusted net income sits between £100,000 and £125,140, your personal allowance is withdrawn at £1 for every £2 earned above £100,000 — creating an effective 60% income tax rate across that band. Pension salary sacrifice reduces your adjusted net income and can move you out of the taper zone entirely. At a £110,000 salary, sacrificing £10,000 saves approximately £6,200 in income tax and NI — meaning that £10,000 pension contribution costs only £3,800 in reduced take-home pay.
High Income Child Benefit Charge (HICBC)
If your adjusted net income is between £60,000 and £80,000 and you or your partner claims child benefit, salary sacrifice can reduce or eliminate the High Income Child Benefit Charge. The charge claws back child benefit at 1% for every £200 of income in that band. For a family receiving child benefit for two children — around £2,337 per year in 2026/27 — reducing adjusted net income below £60,000 saves the full child benefit amount on top of the income tax and NI saving.
Salary, Pension Contribution and £ Pay Calculator Explained
The calculator shows four outputs. Here is what each one means and why it matters.
Gross salary (reduced)
Your new contractual salary after the sacrifice is applied. This is what appears on your payslip and what HMRC uses for income tax and NI purposes. This figure also affects mortgage affordability assessments.
Take-home pay (net salary)
Your actual monthly pay after income tax, employee NI, and any student loan repayments are deducted from the reduced gross salary. This is your real bank balance figure.
Total pension contribution
The full amount going into your pension — your sacrificed salary plus any employer contributions. This is the figure that counts against the £60,000 annual allowance.
Employer NI saving
The amount your employer saves in National Insurance. Shown separately so you can see what could be passed on — useful in HR conversations even if your employer does not currently share it.
Salary Sacrifice Pension vs Standard Pension Contribution
Not all employers offer salary sacrifice — some run relief at source schemes only. If you have both options, the comparison below shows why the salary sacrifice route typically works out better.
Relief at source (standard contribution)
- Contribution deducted from net pay after tax and NI
- Pension provider claims 20% basic-rate tax relief
- Higher-rate taxpayers must claim additional relief via self assessment
- No NI saving for the employee
- No contractual salary change required
Salary sacrifice (salary exchange)
- Gross salary reduced before tax and NI are calculated
- Employee saves both income tax AND employee NI
- Employer saves 15% employer NI — potentially shared back
- No need to claim relief through self assessment
- Contractual salary is genuinely reduced
| Method | £5,000 contribution — higher-rate taxpayer | Tax saved | NI saved | Total saving |
|---|---|---|---|---|
| Relief at source | From net pay | £2,000 | £0 | £2,000 |
| Salary sacrifice | From gross salary | £2,000 | £100 | £2,100 |
The NI saving looks small at higher rates (2% above £50,270), but for basic-rate taxpayers the employee NI saving is 8%, making the difference more significant. Add the employer NI saving that can be passed on, and salary sacrifice is the more tax-efficient route when it is available.
What the April 2029 Changes Mean for Salary Sacrifice
Not a 2026/27 issue — the current rules remain fully in effect. But if you are an employer or adviser building a long-term scheme, the 2029 changes are worth factoring in now.
The 2025 Budget included plans to change the National Insurance treatment of pension salary sacrifice from April 2029. Under the proposed rules, employer NI savings on salary sacrifice pension contributions above £2,000 per year would be removed. The NI advantage would be capped at £2,000 worth of sacrifice annually.
For 2026/27, none of this applies. The current rules remain in full effect. For most employees, the income tax saving on salary sacrifice remains intact regardless — it is the employer NI element above the £2,000 threshold that the 2029 changes target. For most basic-rate and higher-rate employees sacrificing moderate amounts, the bulk of the benefit comes from income tax savings, which are unaffected.
If you are an adviser or employer building a salary sacrifice scheme, it is worth modelling scenarios both with and without the NI element for contributions above £2,000 per year, and communicating what that means for scheme value post-2029.
How to Offer Salary Sacrifice to Your Clients
For financial advisers and accountants, salary sacrifice is one of the most straightforward tax-efficiency wins available to clients — and one that is often not yet in place at businesses you take on. The five steps below cover what is required to implement a compliant scheme.
Confirm HMRC requirements
Salary sacrifice must be a genuine contractual arrangement. The employee must agree to a lower contractual salary in writing, and the employer must pay the employer contribution directly to the pension scheme. Informal or retrospective arrangements do not qualify under HMRC guidance.
Identify employees who cannot participate
Salary sacrifice cannot reduce an employee's cash pay below the National Minimum Wage. Employers must check which employees — typically part-time staff or those on minimum wage — would be taken below the NMW floor and restrict the scheme accordingly.
Set up payroll correctly under PAYE
Under PAYE, the sacrificed amount is not treated as earnings. Payroll software must apply the reduced gross salary for income tax and NI purposes from the effective date of the new employment contract.
Consider the pension scheme type
Net pay arrangement schemes work naturally with salary sacrifice. Relief at source schemes need careful payroll handling — if employees contribute from net pay and the employer makes additional contributions separately, the setup differs. Confirm with the pension provider.
Communicate the employer NI saving
Employers save 15% employer NI on every pound sacrificed. Passing this on — even partially — costs the employer nothing net and materially boosts employee pension pots. This is the conversation many advisers have not yet had with smaller employer clients, and it makes the scheme significantly more attractive to employees.
Why Use Our UK Salary Sacrifice Calculator?
Built specifically for pension salary sacrifice in the 2026/27 tax year. Here is what it covers that many calculators do not.
Current 2026/27 rates
Uses the correct HMRC thresholds — including the updated 15% employer NI rate and the £5,000 secondary threshold introduced from April 2025.
Employer and employee view
Most calculators show only the employee saving. This one shows the employer NI saving too — useful in HR conversations and when advising clients.
Student loan awareness
Plans 1, 2, and 5 are calculated on gross salary. The calculator factors in how salary sacrifice affects student loan repayments, changing your real take-home figure.
£100k taper guidance
Earners above £100,000 see the personal allowance taper flagged automatically — and how much sacrifice brings adjusted net income back below the threshold.
Annual allowance check
Shows whether total pension contributions stay within the £60,000 annual allowance — important if you are making additional personal contributions on top.
Fixed amount or percentage
Enter either a fixed £ amount per month or a percentage of gross salary. Both modes show annual, monthly, and weekly breakdowns side by side.
Annual Allowance, PAYE and Pension Pot Limits Explained
The pension annual allowance for 2026/27 is £60,000, or 100% of your UK earnings — whichever is lower. This covers all contributions going into a defined contribution pension: employee contributions, employer contributions, and salary sacrifice amounts combined. It is not just what you personally contribute.
If you exceed the annual allowance, HMRC charges a tax equal to your marginal income tax rate on the excess. For a higher-rate taxpayer, that is 40% on every pound above the limit.
Carry-forward is available if you have unused allowance from the previous three tax years (2023/24, 2024/25, and 2025/26). This can allow contributions significantly above £60,000 in a single year — useful for anyone who has recently entered a higher salary bracket and wants to make a larger one-off contribution to reduce their adjusted net income.
The tapered annual allowance affects earners with threshold income above £200,000 and adjusted income above £260,000. For these earners, the allowance tapers to a minimum of £10,000. This does not affect most employees, but it is a relevant check before setting a salary sacrifice amount at very high incomes.
Under salary sacrifice, the pension contribution comes from your employer and is not treated as earnings under PAYE. Your PAYE tax code reflects the reduced gross salary, and no further self assessment entries are needed for the sacrificed portion — unlike relief at source contributions, where higher-rate taxpayers must claim additional relief separately.