Pension Salary Sacrifice Calculator
Compare cash take-home before and after pension salary sacrifice. Separate Income Tax, employee NI and selected loan-deduction changes.
Rule year: 2026/27 · GBP · Sources checked
Reduction in annual take-home pay
Pension sacrifice only, age 21 or older and below State Pension age, ordinary Category A employment and no other pension contributions. No employer NI sharing, benefits in kind or compensation outside the entered salary. The annualised wage check is not a legal payroll-compliance assessment for every work arrangement.
Compare annual cash pay and deductions
No employer NI sharing, other pensions or benefits are assumed. A student-loan deduction reduction changes repayment timing, not necessarily the total debt owed.
| Scenario | Cash salary | Income Tax | Employee NI | Take-home |
|---|---|---|---|---|
| Before | £50,000.00 | £7,486.00 | £2,994.40 | £39,519.60 |
| After | £45,000.00 | £6,486.00 | £2,594.40 | £35,919.60 |
For informational purposes only. This estimate is not financial advice, a tax return, a payroll calculation or a lender decision. See the supported circumstances and exclusions below.
How this calculator works
Pension salary sacrifice exchanges part of cash salary for an employer pension contribution. In this supported comparison, the lower salary feeds Income Tax, employee NI and loan deductions. The take-home reduction can therefore be smaller than the amount entering the pension. Reducing a student-loan deduction is not necessarily a reduction in eventual debt cost. The model checks an annualised age-21-plus minimum-wage floor using your entered working hours.
Formula and rules
Net cash impact = take-home before sacrifice − take-home after sacrifice. Tax and NI differences use the same regional rules before and after. Annualised cash hourly pay after sacrifice must meet the supported minimum-wage reference.
Assumptions and limitations
Pension sacrifice only, age 21 or older and below State Pension age, ordinary Category A employment and no other pension contributions. No employer NI sharing, benefits in kind or compensation outside the entered salary. The annualised wage check is not a legal payroll-compliance assessment for every work arrangement.
Worked example
An England employee with £50,000 salary, no student loan and £5,000 pension sacrifice falls to £45,000 cash salary. The annual model reduces Income Tax by £1,000 and employee NI by £400. Take-home falls by £3,600 while £5,000 enters the pension.
- Reduction in annual take-home pay
- £3,600.00
- Gross pension salary sacrificed
- £5,000.00
- Cash salary after sacrifice
- £45,000.00
- Estimated Income Tax reduction
- £1,000.00
Official sources and review
Reviewed against the sources below on 2026-10-06. Rates are held in versioned rule modules. Versioned rules, official source review and year-specific calculation tests.
- HMRC: Salary sacrifice and PAYE ↗
Pension salary-sacrifice assumptions and prohibition on reducing cash earnings below minimum wage.
- HMRC: Rates and thresholds 2026 to 2027 ↗
Regional PAYE bands, Category A NI, student-loan plans and current minimum wage.
- GOV.UK: Income Tax rates and Personal Allowances ↗
2026/27 allowance £12,570, taper above £100,000, and income bands.
- GOV.UK: National Insurance rates ↗
Category A employee rates and Class 4 self-employed rates; no compulsory Class 2 charge in this model.
- GOV.UK: Student-loan repayment amounts ↗
Plan-based earnings deductions, postgraduate repayment and payroll-period limitations.
Common questions
Can salary sacrifice reduce cash pay below minimum wage?
No. The tool blocks the supported annualised scenario below the reviewed age-21-plus rate. Employers must assess the actual work and pay-reference rules.
Does this include an employer NI contribution to my pension?
No. Employer sharing policies differ. Only your entered sacrifice and employee tax/NI/loan effects are shown.
Is a lower student-loan deduction a permanent saving?
Not necessarily. It can defer repayments, and the lifetime result depends on remaining balance, future income and write-off rules not modelled here.