Use this quick estimator to see how an EV salary sacrifice scheme could affect your monthly take-home pay. Enter your figures below and click calculate.
Illustrative only. Actual payslip results vary by payroll setup, pension rules, student loans, and scheme design.
What is an electric vehicle salary sacrifice scheme?
An electric vehicle salary sacrifice scheme lets an employee exchange part of their gross salary for a leased EV package, often including insurance, maintenance, road tax, and breakdown cover. Because the sacrifice comes out before income tax and National Insurance are calculated, the net cost can be much lower than paying for a car from take-home pay.
For fully electric cars, Benefit-in-Kind (BIK) rates are typically low compared with petrol or diesel company cars, which is one of the biggest reasons this approach can be financially attractive.
How this calculator works
This calculator estimates your monthly take-home pay impact with a simplified formula:
- Tax and NI saving = monthly sacrifice × (tax rate + NI rate)
- BIK tax = (P11D value × BIK%) × income tax rate
- Estimated monthly net cost = gross sacrifice − tax/NI saving + monthly BIK tax − employer rebate + pension impact
It then compares your estimated net cost to a personal lease price if you enter one.
Why include P11D and BIK?
Salary sacrifice lowers taxable salary, but the EV is still a taxable benefit. The P11D value and BIK percentage determine how much benefit is taxable. You then pay income tax on that taxable amount based on your marginal tax band.
How to use the calculator effectively
1) Start with real payroll numbers
Use your actual marginal tax and NI rates, not just headline salary band assumptions. If you are near tax thresholds, your marginal rate might change depending on bonuses or overtime.
2) Use the exact scheme quote
Your monthly sacrifice amount should come from your employer’s EV provider quote. Quotes vary based on contract term, mileage, insurance inclusion, and maintenance add-ons.
3) Include pension effects
Some employers calculate pension on pre-sacrifice pay (better for employees), while others use post-sacrifice pay (which can reduce pension contributions). Add that estimated monthly pension impact so your decision is more realistic.
Worked example
Suppose your monthly sacrifice is £650, you pay 40% tax and 2% NI, and the EV has a P11D value of £42,000 with a 2% BIK rate.
- Tax and NI saving: £650 × 42% = £273/month
- Taxable BIK amount per year: £42,000 × 2% = £840
- BIK tax per year at 40%: £336 (about £28/month)
- Estimated monthly net impact: £650 − £273 + £28 = £405/month
If a similar personal lease would cost £800/month, the estimated saving is around £395/month.
Key benefits of EV salary sacrifice
- Tax efficiency: gross salary exchange can significantly cut net monthly cost.
- Low BIK on EVs: usually far lower than traditional company car taxation.
- Bundled costs: many schemes include insurance and maintenance.
- Predictability: fixed monthly amount supports easier budgeting.
- Access: employees can often drive higher-spec EVs than they might otherwise afford.
Important drawbacks to check before signing
- Lower contractual salary: this can affect mortgage affordability checks or life cover tied to salary.
- Pension implications: check whether employer and employee contributions change.
- Early termination costs: leaving your job or long-term sickness may trigger charges depending on policy.
- Mileage and condition rules: excess mileage and damage fees can apply at lease end.
- National minimum wage limits: sacrifice cannot reduce cash earnings below allowed thresholds.
Frequently asked questions
Is this calculator accurate for every employee?
No. It is a high-quality estimate, not payroll advice. Real outcomes vary with payroll software, pension basis, student loan deductions, and employer-specific scheme rules.
What tax rate should I enter?
Use your marginal income tax rate (the rate on your next £1 of earnings), not your average rate across total income.
Can I use this for hybrid cars?
This page is designed for pure EV salary sacrifice scenarios. Hybrid and plug-in hybrid BIK rates are different and depend on emissions and electric-only range.
Final thoughts
An electric vehicle salary sacrifice arrangement can be one of the most cost-effective ways to drive a new EV in the UK. Use this calculator to build an informed estimate, then compare your result with your employer’s official quote and payroll guidance before committing.