EV Salary Sacrifice Calculator
Updated November 2026 · Free · No sign-up
Calculate EV salary sacrifice — trading gross salary for an electric company car: you save income tax + NI on the sacrifice, and pay only the low benefit-in-kind charge (3% of list price 2025/26, rising 1 point yearly to 9% by 2029/30 — verify current).
Quick answer: The math: sacrifice reduces taxable pay (saving 20/40/45% tax + 8%/2% NI); in exchange you’re taxed on the EV’s BiK: list price × the EV rate (3% in 2025/26, climbing 1%/year). A 40% taxpayer on a £600/month sacrifice typically nets an effective ~£350-390 cost — a 35-40% discount vs personal leasing.
How the Saving Builds
| 1. Sacrifice | £600/month of gross pay → you never pay tax/NI on it: a 42% combined saver keeps £252/month |
| 2. BiK charge | £40,000 list × 3% = £1,200 benefit → ×40% tax = £40/month |
| 3. Net cost | 600 − 252 + 40 = £388/month for a £600 lease — insurance/maintenance usually bundled |
The Moving Parts
BiK trajectory: 3% (2025/26) → 4% → 5% → ... 9% by 2029/30 for pure EVs (set by Budget — verify before signing a 3-4 year term; the charge roughly triples across a 2025-2029 lease but stays far below petrol’s 25-37%). Employer side: they save 15% employer NI on the sacrifice minus Class 1A on the BiK — schemes often share this. Guardrails: sacrifice can’t take pay below NMW; pension contributions, maternity pay, and mortgage multiples all read the POST-sacrifice salary — model those before signing.
Worked Comparison
£40k EV: personal lease ~£550-650; sacrifice net ~£388 (higher-rate) or ~£460 (basic) — the advantage scales with your marginal rate. Early-termination clauses (job change!) are the risk to read twice.
Interactions
Student loans compute on post-sacrifice pay — a hidden extra ~9% saving; pension contributions may shrink unless the employer pensions the notional salary (ask); and near-threshold earners can sacrifice back under £100k (childcare) or £50k (HICBC) cliffs — sometimes the biggest win of all. Not financial advice; model your own cliff-edges.
Frequently Asked Questions
How does EV salary sacrifice work?
You exchange gross salary for an electric company car: tax + NI vanish on the sacrificed amount, replaced by a small BiK charge (3% of list price in 2025/26, rising 1%/year).
What will the BiK rate be in future years?
The announced path: 3% (2025/26), then +1 point per year to 9% by 2029/30 for pure EVs — check current Budget announcements before long leases.
What are the catches?
Early-termination fees, NMW floors on the reduced salary, and knock-ons: pension, maternity pay, and mortgage affordability read the post-sacrifice figure.
Can it fix the £100k tax trap?
Sacrifice reduces adjusted net income — dropping under £100k restores the personal allowance and free-childcare eligibility; under £50k-60k softens HICBC. Often the largest effective saving.
Is it cheaper than leasing personally?
Usually 30-45% net for higher-rate taxpayers, less for basic — compare bundled insurance/maintenance too; the gap narrows as BiK rises.
✓ Formula verified • Last updated: November 3, 2026