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.
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Estimates only — based on HMRC BiK tables for 2025/26.
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| 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 and 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 (maximum 37%) |
|---|
CO₂ data is based on WLTP figures for vehicles registered after April 2020. See official HMRC BIK tables at HMRC Vehicle Benefit Charges.
How Company Car Tax Works
Company car tax is calculated using the vehicle P11D value, 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 Percentage: Determined by CO₂ emissions and fuel type.
- Taxable Benefit: P11D value × BIK percentage.
- Your Tax: Taxable benefit × your tax band (20%, 40% or 45%).
- Diesel Vehicles: May include a 4% supplement.
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This calculator automatically applies the correct BIK rate based on the latest HMRC guidance.
Company Car Tax Examples
- BIK Rate: 2%
- Taxable Benefit: £800
- 20% taxpayer: £160 per year
- 40% taxpayer: £320 per year
- BIK Rate: 8%
- Taxable Benefit: £2,800
- 20% taxpayer: £560 per year
- 40% taxpayer: £1,120 per year
- BIK Rate: 33%
- Taxable Benefit: £9,240
- 20% taxpayer: £1,848 per year
- 40% taxpayer: £3,696 per 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. More information at HMRC.