Salary Sacrifice Tax Calculator UK 2025/26

Salary sacrifice tax calculator UK 2025/26 — see exact tax + NI savings on pension, EV, cycle scheme, childcare. Save 32

Quick answer: Salary sacrifice saves you the full income tax + employee NI rate on every £1 sacrificed: basic rate 28%, higher rate 42%, additional rate 47%. £100/month into pension salary sacrifice on a £40k salary = £33.60/month real cost.
Mustafa Bilgic
Reviewed by Mustafa Bilgic · UK Calculator Editor ·

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Salary sacrifice is a legal arrangement where you give up part of your gross salary in exchange for a non-cash benefit (pension, EV, cycle, childcare). Because the sacrificed amount comes off your gross pre-tax/NI, you save your full marginal rate. This calculator shows exact savings for 2025/26.

How salary sacrifice tax calculator works in 2025/26

Why salary sacrifice beats personal contribution:

Method£100 to PensionReal CostSaving
Personal pension (basic)£100£80 (20% relief at source)20%
Salary sacrifice (basic)£100£72 (28% saved)28%
Personal pension (higher)£100£60 (40% claim back)40%
Salary sacrifice (higher)£100£58 (42% saved)42%

Plus your employer saves 13.8% NI on the sacrificed amount — many enlightened employers pass this saving back as additional pension contribution, doubling the benefit.

Common salary sacrifice schemes 2025/26:

  • Pension — most common, saves 28-47%, no NI on contributions
  • EV (electric vehicle) — Benefit-in-Kind only 3% 2025/26 (vs 35% for ICE), massive saving
  • Cycle to Work — full bike value (up to £4k+ now after FCA changes), saves 32-47%
  • Childcare voucher — legacy scheme, closed to new entrants since Oct 2018
  • Tax-free childcare — current government scheme (not strictly salary sacrifice)

Worked example: £35k earner sacrifices £200/month to pension

Sacrifice £2,400/year. Saves £480 tax (20%) + £192 NI (8%) = £672/year saving. Real cost £1,728. If employer passes back their £331 NI saving = pension grows £2,731 for £1,728 cost.

Gross: £35,000 → Take-home: £28,719.60/year (£2,393.30/month)

Worked example: £60k earner sacrifices £600/month EV (Tesla Model 3)

£7,200/year sacrificed. Saves £2,880 income tax (40%) + £144 NI (2%) = £3,024 tax/NI. BIK = lease value (£600) × 3% × 12 = £216 taxable. Net annual saving £2,808 vs personal lease.

Gross: £60,000 → Take-home: £41,513.60/year (£3,459.47/month)

Worked example: £28k earner uses Cycle to Work £1,200 bike

£1,200 bike value sacrificed over 12 months. Saves 28% = £336. Real cost £864 for £1,200 bike. (Plus end-of-scheme transfer at fair market value, typically 7-25% depending on age).

Gross: £28,000 → Take-home: £23,679.60/year (£1,973.30/month)

Frequently asked questions

Is salary sacrifice the same as net pay arrangement?
No. Salary sacrifice REDUCES your gross salary, so all calculations (tax, NI, mortgage, SMP, state pension) work off the lower figure. Net pay arrangement deducts AFTER tax (relief at source for basic-rate). Salary sacrifice saves NI; net pay does not.
Can salary sacrifice take me below minimum wage?
No — your post-sacrifice salary must remain at or above National Minimum Wage. For 2025/26: NLW £12.21/hr (21+), £10.00 (18-20), £7.55 (under 18 + apprentices). Some sacrifice schemes auto-cap to prevent breach.
Does salary sacrifice affect my pension contributions limit?
No — salary sacrifice contributions count toward your £60,000 Annual Allowance (or tapered min £10k for high earners). They don't use the £3,600 minimum non-earner limit because you're already paying the gross from salary.
How does salary sacrifice affect my SMP/SPP?
It REDUCES your statutory maternity pay base. SMP first 6 weeks = 90% × average weekly earnings (post-sacrifice). If you sacrifice £400/month and have 8-week qualifying period, your SMP could be £369-£400 lower per month. Some employers 'gross up' SMP base — check.
Can I salary sacrifice a bonus?
Yes — 'bonus sacrifice' is increasingly popular. Sacrificed bonus into pension saves 32-47% AND avoids additional-rate band creep. Must be agreed BEFORE bonus is paid (HMRC rule). Many schemes have limits (e.g. up to 100% of bonus).
Does salary sacrifice impact my mortgage?
Yes — most lenders use post-sacrifice salary for affordability. £40k post-£4k pension sacrifice = £36k for mortgage assessment. Some specialist lenders gross-up; mainstream lenders don't. Plan around mortgage applications.
What happens to my salary sacrifice if I leave?
Sacrifice stops on leave date. Pension contributions stop (already-paid contributions stay invested). EV: car returns to scheme, no break fee for redundancy in most schemes. Childcare voucher: legacy unused vouchers refunded at NMW-protected rate.

Official UK Sources

Last reviewed: May 2026 against HMRC 2025/26 rates.

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