BIKGeneral information, not personal tax advice
BIK Tax Calculator helps explain standard company car benefit calculations. We do not assess your full income, tax code, employment contract or eligibility for every relief. Using the website does not create a professional adviser–client relationship.
Before making a financial commitment, confirm the vehicle specification and benefit treatment with your employer or an appropriately qualified adviser. HMRC’s rules take precedence over an explanation on this website.
What the monthly estimate assumes
- The entire calculated benefit is taxed at the Income Tax rate you select.
- The monthly result is the annual estimated tax divided by 12, including for a part-year scenario. It is not necessarily the deduction in each month you have the car.
- Capital and private-use contributions qualify under the relevant rules.
- The chargeable-day figure is correct. The same availability factor is used for selected car fuel benefit.
- A selected plug-in hybrid emissions easement is valid for the vehicle concerned.
Crossing a tax band, Personal Allowance tapering, PAYE adjustments and other income-related charges can change the amount you actually pay. Employer Class 1A NI is shown separately and is not added to employee tax.
Situations requiring a separate calculation
The main tool does not calculate classic-car valuation, cars without a certified emissions figure, shared-car allocations, specialist exemptions, different car and fuel availability periods, or the optional remuneration comparison for relevant salary sacrifice arrangements.
The van tool assumes full-year sole use, no qualifying contributions and no salary sacrifice. Vehicle classification, shared use and part-year circumstances need additional checks. The website is not a complete salary, corporation tax, VAT or Vehicle Excise Duty calculator.
Vehicle details and illustrative examples
Prices and vehicle specifications are entered by you. We do not retrieve registration records or provide a live manufacturer database. Toyota and Lexus guidance uses the same statutory calculation method as other brands; it is not an endorsement or a confirmed model-specific quote.
The car image is AI-generated illustration. Examples and the About page’s self-assessment are explanatory content, not customer testimonials, independent reviews or evidence of guaranteed savings.
Accuracy, changes and independence
The implementation has automated arithmetic checks, but those checks cannot cover every tax situation or certify professional accuracy. Browser rendering and real-world loading speed have not been independently verified. Rates and sources are dated so you can check their relevance.
The site is not operated or endorsed by HMRC or any vehicle manufacturer. It does not guarantee savings, search rankings, continuous availability or a particular payroll result. Read the About page for the current verification status and official source links for the method.
Nothing in this disclaimer overrides rights or responsibilities that cannot lawfully be excluded. See the terms of use for further information.