Company-car BIK calculator

Estimate Benefit-in-Kind tax for a pure electric company car versus a petrol car, using HMRC appropriate percentages and your income-tax band.

Official rates, simplified maths. Cash equivalent ≈ list price × appropriate %. Tax ≈ cash equivalent × your marginal Income Tax rate. This ignores capital contributions, days unavailable, diesel supplements, fuel benefit and Scottish rate bands unless you pick a matching rate. Not tax advice — check GOV.UK and your payroll.

Tax year & band

Tax year Your marginal Income Tax rate

England/NI/Wales rates from GOV.UK Income Tax pages for 2026 to 2027. Scotland has its own bands — pick the rate that matches your payroll.

Electric company car

List price (P11D)£

OTR chips are UK on-the-road cash prices from this site’s lineup (as of that page’s retrieval). Company-car BIK uses the list price including VAT and extras for tax — enter the P11D figure your employer uses if different.

Pure EV (0 g/km CO₂) appropriate % is fixed for the tax year: 4%.

Petrol comparison

List price (P11D)£ CO₂ (g/km, WLTP)g/km

Appropriate % looked up from HMRC’s 480 Appendix 2 WLTP table for the selected tax year (petrol/hybrid ready reckoner). Diesel +4% supplement is not applied here — tick nothing; add it yourself if needed.

Annual BIK tax (estimate)

–EV tax / year

–Petrol tax / year

–difference

Working

Sources (retrieved 6 Nov 2026)

HMRC: Company car benefit — appropriate percentage (480 Appendix 2) — tables for 2025–26 and 2026–27; page last updated 6 April 2026.
Budget 2026 OOTLAR Annex A — forward EV rates including 5% in 2027–28.
GOV.UK: Tax on company cars
GOV.UK: Income Tax rates — basic 20% / higher 40% / additional 45% (England, NI, Wales).
Pure EV electricity is not treated as a company-car fuel for the separate fuel benefit — see GOV.UK company-car guidance; confirm with payroll.