Total Benefits in Kind Calculator 2025/26
Add all your employer benefits and calculate your total P11D value, income tax, and employer Class 1A NIC
Last updated: March 2026 | Rates: HMRC 2025/26 | Author: Mustafa Bilgic
Disclaimer: This tool provides estimates based on standard HMRC BIK rules for 2025/26. Company car BIK percentages vary by CO2 and fuel type. For precise calculations consult HMRC's Company Car Tax Manual or a qualified accountant.
Add Your Benefits in Kind
Click "Add Benefit" for each BIK you receive. The calculator will compute each benefit's taxable value using HMRC rules.
Benefit-by-benefit breakdown
| Benefit | Basis | Taxable Value |
|---|
Total P11D value
Income tax on BIK
Employer Class 1A NIC (13.8%)
Your total extra tax per year
2025/26 BIK Reference Rates
| Benefit | BIK Value Basis |
|---|---|
| Company car | List price × CO2 % (2%–37%) |
| Van (private use) | £3,960 flat rate |
| Fuel benefit (car) | £27,800 × CO2 % |
| Medical insurance | Employer premium paid |
| Beneficial loan | Balance × (2.25% − your rate) |
| Mobile phone (2nd+) | Contract / purchase cost |
| Asset use | Market value × 20%/year |
| Employer Class 1A NIC rate | 13.8% of total BIK |
Frequently Asked Questions
What is a benefit in kind? +
A benefit in kind (BIK) is a non-cash benefit provided by an employer to an employee. Examples include company cars, private medical insurance, beneficial loans, living accommodation, and mobile phones. Most BIKs are taxable and must be reported on form P11D or via payroll.
How is BIK tax calculated? +
BIK tax is calculated by multiplying the taxable value of the benefit by your income tax rate. If you are a basic rate taxpayer, you pay 20% of the BIK value. Higher rate taxpayers pay 40%. The taxable value depends on the type of benefit — for example, a company car is based on list price × CO2 percentage.
What is Class 1A National Insurance on BIK? +
Employers pay Class 1A National Insurance on most benefits in kind. The rate for 2025/26 is 13.8% of the total taxable BIK value. This is separate from the employee's income tax on the benefit. Class 1A NIC is reported on form P11D(b).
What is a P11D form? +
A P11D is the form employers use to report benefits in kind to HMRC. Employers must submit P11D forms by 6 July following the tax year end. Employees receive a copy (P11D) and the values are included in their tax calculation. Since April 2016, employers can also payroll benefits instead.
How is company car BIK calculated? +
Company car BIK is calculated as: list price × appropriate percentage (based on CO2 emissions). For 2025/26, the BIK rate ranges from 2% for zero-emission electric vehicles to 37% for high-emission vehicles. The appropriate percentage is set by HMRC and published each year.
What is the fuel benefit charge? +
If your employer provides fuel for private use in a company car, the fuel benefit charge applies. It is calculated as the fuel multiplier (£27,800 for 2025/26) × the same CO2 percentage as the company car. This is often not worth the employer providing given the tax cost.
How is beneficial loan BIK calculated? +
A beneficial loan is a loan provided by an employer at below the HMRC official rate of interest. The BIK is calculated as: average loan balance × (official rate − interest rate you pay). The official rate for 2025/26 is 2.25%. Loans up to £10,000 total are exempt.
Is private medical insurance taxable as a BIK? +
Yes. Private medical insurance (PMI) paid by your employer is a taxable benefit in kind. The taxable value is the premium paid by the employer. Family cover creates a higher BIK value. You pay income tax on the full premium amount.
Is a mobile phone taxable as a BIK? +
One mobile phone provided by an employer is exempt from BIK tax. However, if your employer provides a second phone (or any additional phones), the full cost is a taxable benefit in kind. The exemption applies per employee, not per handset.
Can I reduce my BIK tax? +
You can reduce BIK tax by making good contributions — paying your employer for private use of the benefit. This reduces the taxable value pound-for-pound. Choosing lower-emission company cars, electric vehicles, or declining certain benefits also reduces your P11D value.
What is the van benefit charge? +
If an employer provides a van for private use, a flat-rate van benefit charge applies. For 2025/26, this is £3,960 per year. If the employer also pays for fuel for private journeys in the van, an additional van fuel benefit of £757 applies.
When must P11D forms be filed? +
P11D forms must be filed with HMRC by 6 July following the end of the tax year (5 April). Copies must be given to employees by the same date. Class 1A NIC (reported on P11D(b)) must be paid by 19 July (22 July for electronic payment). Late filing attracts penalties.