UK Salary Exchange Pension Calculator
Calculate your potential savings with salary exchange for the 2025/26 tax year
How Salary Exchange Works
Salary exchange (also known as salary sacrifice) is an arrangement where you give up part of your salary in exchange for your employer making equivalent pension contributions on your behalf. This can result in significant tax and National Insurance savings for both you and your employer.
Key Benefits: You’ll pay less Income Tax and National Insurance contributions, whilst potentially increasing your pension pot or take-home pay, depending on the type of arrangement you choose.
Types of Salary Exchange
Simple Salary Exchange
With simple salary exchange, you sacrifice part of your salary for pension contributions. Your take-home pay increases because you pay less National Insurance on your reduced salary, whilst your pension contributions remain the same.
SMART Salary Exchange
SMART (Save More And Reduce Tax) salary exchange maintains your current take-home pay level. The National Insurance savings you make are redirected into your pension pot, increasing your total pension contributions without any cost to your current lifestyle.
2025/26 Tax Year Rates
| Tax Band | Income Range | Tax Rate | Employee NI Rate | Employer NI Rate |
|---|---|---|---|---|
| Personal Allowance | Up to £12,570 | 0% | 0% | 15% (above £5,000) |
| Basic Rate | £12,571 – £50,270 | 20% | 8% | 15% |
| Higher Rate | £50,271 – £125,140 | 40% | 2% | 15% |
| Additional Rate | Over £125,140 | 45% | 2% | 15% |
Potential Savings Example
Consider an employee earning £30,000 annually who currently contributes 5% (£1,500) to their pension through normal payroll deduction:
| Scenario | Normal Contribution | Simple Salary Exchange | SMART Salary Exchange |
|---|---|---|---|
| Gross Salary | £30,000 | £28,500 | £28,380 |
| Employee Pension Contribution | £1,500 | £0 | £0 |
| Employer Pension Contribution | £900 (3%) | £2,400 | £2,520 |
| Annual Take-home Pay | £23,920 | £24,040 | £23,920 |
| Total Pension Contribution | £2,400 | £2,400 | £2,520 |
Frequently Asked Questions
Is salary exchange suitable for everyone?
Salary exchange isn’t suitable for all employees. It cannot be used if it would take your pay below the National Minimum Wage. Additionally, it may affect means-tested benefits, maternity pay, or mortgage applications as these are often based on your gross salary.
How much can I sacrifice?
You can sacrifice any amount up to your total annual allowance for pension contributions (currently £60,000 for most people, though this may be lower if you’ve accessed pension benefits). However, your post-sacrifice salary must not fall below the National Minimum Wage.
Will salary exchange affect my State Pension?
As long as your post-sacrifice earnings remain above £12,570 (the National Insurance threshold), your State Pension entitlement won’t be affected. Below this threshold, you may need to make voluntary contributions to maintain your National Insurance record.
Can I change or stop salary exchange?
Yes, most employers allow you to review your salary exchange arrangements annually, or following significant life events such as marriage, divorce, or the birth of a child. Check with your employer about their specific flexibility arrangements.
What happens to employer National Insurance savings?
Employers save 15% National Insurance on the amount you sacrifice. Some employers pass all or part of these savings back to you as additional pension contributions, whilst others may retain them. This varies by employer policy.
How does salary exchange affect my payslip?
Your gross salary will show as reduced by the sacrifice amount. Your pension contributions will appear as £0 for employee contributions, with the full amount showing as employer contributions. Your tax and National Insurance will be calculated on the reduced gross salary.
Important Considerations
Before entering a salary exchange arrangement, consider these important factors:
- Benefits Impact: Some benefits like life insurance, income protection, or enhanced maternity/paternity pay may be based on your gross salary
- Mortgage Applications: Lenders typically assess affordability based on gross salary, so salary exchange may affect borrowing capacity
- Minimum Wage: Your post-sacrifice salary must not fall below National Minimum Wage rates
- Annual Allowance: Total pension contributions (including employer contributions) must not exceed your annual allowance
- Flexibility: Salary exchange arrangements are typically binding for at least 12 months
Who Should Consider Salary Exchange?
Salary exchange can be particularly beneficial for:
- Basic rate taxpayers looking to increase take-home pay or pension contributions
- Higher rate taxpayers who want to maximise pension contributions tax-efficiently
- Employees whose employers pass on some or all of their National Insurance savings
- Those with stable income who won’t need to access the sacrificed salary during the arrangement period
References
- HM Revenue and Customs. (2025). Rates and thresholds for employers 2025 to 2026. GOV.UK.
- HM Revenue and Customs. (2025). National Insurance rates and categories: Contribution rates. GOV.UK.
- HM Revenue and Customs. (2025). Pension schemes rates. GOV.UK.
- The Pensions Regulator. (2025). Automatic enrolment: A detailed guide for employers. TPR.
- Legal & General. (2025). Salary sacrifice calculator – Workplace pensions. Legal & General.
- The People’s Pension. (2025). How salary exchange works. The People’s Pension.
- PwC. (2025). United Kingdom – Individual – Other taxes. PwC Tax Summaries.
- Department for Work and Pensions. (2025). Understanding the attitudes and behaviours of employers towards salary sacrifice for pensions. GOV.UK.