BIK Calculator Ireland (Company Car)
Estimate your annual and monthly Benefit-in-Kind (BIK) value and tax cost for an Irish company car.
How this BIK calculator for Ireland works
If your employer gives you a company car that is available for private use, Revenue generally treats that as a taxable benefit. This is called Benefit in Kind (BIK). In practice, your payroll applies tax to the cash equivalent value of that benefit.
The car BIK formula is broadly:
Taxable BIK Value = (OMV × BIK % rate) − employee contribution
Then your estimated tax cost is:
Estimated Tax = Taxable BIK Value × your effective tax rate
Current BIK rate structure used in this calculator
This tool uses a widely used emissions-and-mileage matrix for company cars in Ireland. Your exact payroll treatment can vary based on updates, temporary reliefs, and your personal tax position.
| CO₂ Band (g/km) | 0–26,000 km | 26,001–39,000 km | 39,001–52,000 km | 52,001+ km |
|---|---|---|---|---|
| 0–59 | 22.5% | 18% | 13.5% | 9% |
| 60–99 | 27% | 21% | 15% | 10.5% |
| 100–139 | 30% | 24% | 18% | 12% |
| 140–179 | 33% | 27% | 21% | 14% |
| 180+ | 37.5% | 30% | 22.5% | 15% |
Step-by-step example
Example assumptions
- OMV: €45,000
- CO₂: 115 g/km (100–139 band)
- Business km: 28,000 (26,001–39,000 band)
- BIK rate: 24%
- Effective tax rate: 52%
Annual taxable BIK value = €45,000 × 24% = €10,800. Estimated annual tax = €10,800 × 52% = €5,616. Monthly estimated tax cost = €468.
What inputs matter most?
1) OMV (Original Market Value)
Higher OMV generally means higher taxable benefit. Even small changes in list price can materially affect annual tax.
2) CO₂ emissions
Cleaner vehicles usually attract a lower percentage. If you're comparing cars, emissions can have a large impact over time.
3) Business kilometres
More qualifying business mileage may reduce your BIK percentage band. Accurate mileage logs matter.
4) Your effective tax rate
The BIK value is taxable income, so your real out-of-pocket cost depends on your total marginal/effective payroll deductions.
Electric vehicles and temporary reliefs
Depending on the tax year, specific BIK measures can apply to EVs and low-emission cars (for example OMV deductions or transitional supports). To help with planning, this calculator includes an optional OMV relief field so you can model a reduced assessable value.
How to reduce company car BIK legally in Ireland
- Choose a lower-emission vehicle when possible.
- Track business mileage carefully and consistently.
- Understand whether EV or transitional relief applies in your tax year.
- Review OMV and trim level before selecting a car.
- Check if employee contributions are structured and recorded correctly.
Common mistakes people make
- Using private mileage instead of business mileage for the band check.
- Forgetting that OMV is not always the same as current second-hand value.
- Ignoring USC/PRSI when estimating tax impact.
- Assuming all EV benefits are permanent and unchanged year to year.
Final thoughts
A good BIK calculator for Ireland should do more than produce a number—it should help you compare options before signing a company car package. Use this page to test scenarios quickly, then confirm exact payroll treatment with your employer or a tax professional.