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Calculate your real monthly cost after tax and NI savings. See exactly how much salary sacrifice saves you vs PCP or buying outright.
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The gross amount deducted from your salary each month (from your employer's fleet quote). Includes lease, insurance and servicing.
Used only for BIK tax calculation. Auto-populated from selected model.
You save £8,618 over 3 years vs personal lease
Combined income tax and National Insurance savings over your 3-year salary sacrifice term. BIK tax offset against savings.
| Salary Sacrifice | Personal Lease | |
|---|---|---|
| Monthly payment | £570 gross | £570 net |
| Tax & NI saving | £2,873/yr | None |
| BIK tax | +£608/yr | None |
| Net effective monthly | £381 | £570 |
| Total 3yr cost | £13,725 | £20,520 |
Tax calculations are estimates using 2026/27 rates for England, Wales and Northern Ireland; Scottish income tax rates differ. Check the current HMRC rates and consult your employer's HR or benefits team and a qualified tax adviser before making a financial decision.
The calculator deducts the employer's quoted gross monthly sacrifice before income tax and employee National Insurance, then adds company-car Benefit-in-Kind tax using the selected tax year's EV percentage.
Scheme quotes may bundle insurance, maintenance and tyres. Pensionable pay, student loans, tax-code adjustments, Scottish income-tax bands and early-termination charges are not fully modelled, so compare the output with the employer illustration.
Data quality
Last updated 5 September 2026
Rates can change. Use your own quote, tariff or vehicle documents where available.
A higher-rate taxpayer generally saves more tax on the sacrificed salary, but also pays BIK tax at the higher marginal rate. Enter the actual employer quote for a useful result.
A basic-rate taxpayer normally receives a smaller tax saving. Check that the sacrifice does not take cash pay below National Minimum Wage.
The Benefit-in-Kind (BIK) rate for a Tesla and other zero-emission company cars is 4% for 2026/27. The confirmed rates are 3% for 2025/26, 5% for 2027/28, 7% for 2028/29 and 9% for 2029/30.
With salary sacrifice, your employer leases the car and you give up a portion of your pre-tax salary in exchange. This reduces your taxable income, saving you income tax and National Insurance contributions. Your gross salary is reduced before tax is calculated, meaning you pay less tax overall.
You need your employer to offer a salary sacrifice car scheme. Many larger employers now offer these schemes, and specialist providers like Octopus EV, Onto, and various leasing companies administer them. Check with your HR or benefits team to find out if your employer participates.
It can be, but the result depends on your tax band, employer quote, pension treatment, mileage allowance and early-termination terms. Income tax and National Insurance savings are partly offset by company car tax, calculated using the 4% EV BIK rate for 2026/27.