UK Company Car Tax Calculator
Estimate the Benefit in Kind (BiK) company car tax for the 2025/26 tax year based on CO₂ emissions and fuel type.
Options
Estimates only — based on HMRC BiK tables for 2025/26.
Ready
| Details | Value |
|---|---|
| P11D Value | £0.00 |
| CO₂ Emissions | 0 g/km |
| Fuel Type | - |
| Total Tax Payable | £0.00 |
Company Car Tax (BIK) Rates 2025–26
BIK Percentages (Petrol & Diesel Cars)
| CO₂ Emissions (g/km) | BIK % |
|---|---|
| 0 | 2% |
| 1–50 (Electric range > 130 miles) | 2% |
| 1–50 (70–129 miles) | 5% |
| 1–50 (40–69 miles) | 8% |
| 1–50 (30–39 miles) | 12% |
| 1–50 (< 30 miles) | 14% |
| 51–54 | 15% |
| 55–59 | 16% |
| 60–64 | 17% |
| 65–69 | 18% |
| 70–74 | 19% |
| 75–79 | 20% |
| 80–84 | 21% |
| 85–89 | 22% |
| 90–94 | 23% |
| 95–99 | 24% |
| 100–104 | 25% |
| 105–109 | 26% |
| 110–114 | 27% |
| 115–119 | 28% |
| 120–124 | 29% |
| 125–129 | 30% |
| 130–134 | 31% |
| 135–139 | 32% |
| 140–144 | 33% |
| 145–149 | 34% |
| 150+ | 35% |
Electric Vehicles (EVs)
| Zero-emission vehicles | 2% BIK rate |
|---|---|
| From 2026 onwards | Gradual increases planned |
Diesel Supplement
❗ Most diesel cars attract a +4% surcharge unless RDE2 compliant.
| Diesel non-RDE2 compliant | +4% added to BIK rate (max 37%) |
|---|
CO₂ data is based on WLTP figures for vehicles registered after April 2020.
How Company Car Tax Works
Company car tax is calculated using the vehicle’s P11D value (list price), CO₂ emissions, BIK percentage and your income tax band. This is known as a “Benefit in Kind” (BIK) charge.
- P11D Value: List price including options, delivery, and VAT.
- BIK %: Based on CO₂ emissions and fuel type.
- Taxable Benefit: P11D value × BIK percentage.
- Your Tax: Taxable benefit × your tax band (20%, 40%, or 45%).
- Diesel cars: May have a 4% supplement added.
This calculator automatically applies the correct BIK rate for your vehicle.
Company Car Tax Examples
- BIK Rate: 2%
- Taxable Benefit: £800
- 20% taxpayer: £160/year
- 40% taxpayer: £320/year
- BIK Rate: 8%
- Taxable Benefit: £2,800
- 20% taxpayer: £560/year
- 40% taxpayer: £1,120/year
- BIK Rate: 33%
- Taxable Benefit: £9,240
- 20% taxpayer: £1,848/year
- 40% taxpayer: £3,696/year
Frequently Asked Questions
This UK Company Car Tax Calculator uses HMRC 2025–26 BIK percentages including electric vehicle rates, WLTP CO₂ bands and diesel supplements.