P11D Benefits in Kind Calculator
Calculate the tax on your employee benefits. Add multiple benefits, see the breakdown, and understand your total P11D liability.
Updated for 2025/26 tax year
Your Benefits
Company Car
P11D value x BIK % based on emissions
Electric: 5% | Petrol: 5-37% based on emissions
Your Tax Rate
Tax Summary
Breakdown
Tax is collected via your tax code, reducing your take-home pay each month
Track All Your P11D Benefits
AccountsOS automatically tracks company cars, medical insurance, and other benefits. Know exactly what tax you'll pay before it hits your payslip.
Get Started FreeUnderstanding P11D and Benefits in Kind
Benefits in Kind (BIKs) are non-cash perks that employers provide to employees. While they're valuable, they're also taxable. The P11D form is how HMRC tracks these benefits and ensures the correct tax is collected.
Common P11D Benefits
- Company cars - Taxed based on P11D value and CO2 emissions. Electric cars have just 5% BIK rate vs up to 37% for high-emission vehicles.
- Private medical insurance - The full premium paid by your employer is taxable at your marginal rate.
- Beneficial loans - Interest-free or low-interest loans over £10,000 are taxed on the difference between HMRC's official rate (2.25%) and what you pay.
- Gym memberships - On-site gyms are tax-free, but paid memberships to external gyms are taxable.
How Tax is Collected
Unlike salary which has tax deducted at source, P11D benefits are taxed by adjusting your tax code. HMRC reduces your tax-free allowance, so you pay more tax throughout the year on your regular salary.
Employer Costs
Employers pay 15% Class 1A National Insurance on the total value of benefits provided. This is paid annually by 22 July (or 19 July if by post). It's an additional cost on top of the benefit itself, so a £1,000 benefit actually costs the company £1,150.
Frequently Asked Questions
Common questions about P11D forms, Benefits in Kind, and how to minimize your tax liability
What is a P11D form?
A P11D is a form that UK employers submit to HMRC to report Benefits in Kind (BIKs) and expenses provided to employees that aren't included in their regular payroll. This includes company cars, private medical insurance, beneficial loans, and other taxable perks. The form is due by 6 July following the end of the tax year.
Who needs to submit a P11D?
Employers must submit a P11D for each employee or director who received taxable benefits or expenses during the tax year that weren't payrolled. If you've registered to payroll benefits, you don't need to include those on the P11D. A P11D(b) form is also required to report the Class 1A National Insurance due on all benefits.
How is Benefit in Kind tax calculated?
BIK tax is calculated by multiplying the cash equivalent value of the benefit by your marginal income tax rate. For example, if you receive private medical insurance worth £1,500 and you're a 40% taxpayer, you'll pay £600 in tax (£1,500 x 40%). The employer also pays 15% Class 1A NI on the benefit value.
What is the beneficial loan interest rate for 2025/26?
The official HMRC beneficial loan interest rate for 2025/26 is 2.25%. If your employer provides a loan at 0% or below this rate, the difference is a taxable benefit. Loans under £10,000 are exempt from this rule and don't need to be reported on the P11D.
Can I reduce my P11D tax liability?
There are several ways to reduce P11D tax: choose electric company cars (5% BIK rate vs up to 37% for petrol), use salary sacrifice schemes where appropriate, ensure only business-related benefits are provided, and consider payrolling benefits to spread the tax impact. Some benefits like cycle-to-work schemes under £1,000 or workplace parking are tax-exempt.
What is the deadline for P11D submission?
The P11D form must be submitted to HMRC by 6 July following the end of the tax year. For the 2024/25 tax year, the deadline is 6 July 2025. Employees must receive their copy by the same date. Class 1A NI on benefits is due by 22 July (or 19 July if paying by post).