UK P11D Benefit-in-Kind Calculator
Work out the taxable cash equivalent of every benefit on your P11D — company cars, fuel, vans, private medical insurance, beneficial loans and more. See your income tax bill and your employer's Class 1A NIC for 2026/27 in one place.
The rate your next £1 of income is taxed at. Scottish taxpayers: pick the closest band.
List price (P11D value) × BIK % based on CO2 emissions and fuel type.
One-off capital paid towards the cost of the car. Reduces the list price before the BIK percentage is applied, capped at £5,000 in total across all years (EIM24355).
Amount you are required to pay each year for private use. Deducted from the benefit itself, with no cap, but it cannot take the charge below nil.
Taxed on the cost to the employer (the premium paid).
Mix and match to reflect everything on your P11D form. Class 1A NIC for 2026-27 is 15%.
Your Income Tax
£4,080at 40% · £340.00/mo
Total BIK (Cash Equivalent)
£10,200Goes on Section N of your P11D
Employer Class 1A NIC
£1,53015% · due 22 July
Total Employer Cost
£11,730Benefits + Class 1A NIC
| Benefit | Cash Equivalent | Your Tax | Class 1A NIC |
|---|---|---|---|
Company car BIK rate 30% | £9,000.00 | £3,600.00 | £1,350.00 |
Private medical insurance | £1,200.00 | £480.00 | £180.00 |
| Total | £10,200.00 | £4,080.00 | £1,530.00 |
Need a dedicated vehicle or employer-liability calculation? Open the Company Car, Van & P11D hub.
What is a P11D?
A P11D is the form your employer files with HMRC each year to report taxable expenses and benefits-in-kind (BIKs) — non-cash perks like a company car, private health insurance, or an interest-free loan. Each benefit has a "cash equivalent" calculated under HMRC rules and added to your taxable income.
You pay income tax on the cash equivalent at your marginal rate, and your employer pays Class 1A National Insurance at 15% (2025/26 onwards). Both the P11D and P11D(b) are due by 6 July, and Class 1A NIC is payable by 22 July.
Key P11D Figures for 2026/27
- Company van flat benefit charge — £4,170 (zero for electric vans)
- Van fuel benefit charge — £798
- Car fuel benefit multiplier — £29,200 × BIK%
- Official Rate of Interest (beneficial loans) — 3.75%
- Beneficial loan exemption — loans under £10,000 are ignored
- Electric car BIK rate — 4% (rising to 5% in 2027/28)
- Class 1A NIC rate — 15%
Which Benefits Go on a P11D?
Common benefits reported on the P11D include:
- Company cars — list price × CO2-based BIK %
- Car or van fuel — flat multiplier × BIK %, or flat charge
- Private medical insurance — cost to employer
- Beneficial loans — notional interest at the Official Rate
- Living accommodation — annual value plus any excess cost above £75,000
- Gym memberships, gifts, childcare vouchers (when not payrolled)
- Assets transferred to an employee — market value or cost
From April 2026, many employers payroll benefits through PAYE in real time instead of reporting on a P11D. The cash equivalent is the same either way — this calculator shows what you'd owe on each benefit regardless of which reporting route your employer uses.
Who Pays What?
You (the employee) pay income tax at your marginal rate on the total cash equivalent of all benefits. It's normally collected via an adjustment to your tax code, so you'll notice a higher deduction on your payslip.
Your employer pays Class 1A National Insurance at 15% on the same total. You do not pay Class 1 NI on most P11D benefits (payrolled benefits are different). Class 1A is the employer's cost, and it's due annually by 22 July following the end of the tax year.
Company car BIK % by CO2 emissions (2026/27)
A company car's cash equivalent is its P11D list price × the appropriate percentage below. Zero-emission cars are taxed at 4% in 2026/27. Plug-in hybrids at 1–50 g/km are banded by electric-only range rather than CO2 alone, so a short-range PHEV is taxed far higher than an EV; from 51 g/km the rate rises with CO2 to a 37% cap.
The P11D value (list price) is the manufacturer's published price when the car was first registered — including VAT, delivery and factory-fitted options, but excluding road tax and the first-registration fee. It is not what was actually paid, so discounts and depreciation don't reduce it. Full detail with worked examples: how to find the P11D value of your car.
| CO2 emissions | Appropriate (BIK) % |
|---|---|
| Electric / 0 g/km | 4% |
| 1–50 g/km, under 30 mile electric range | 16% |
| 51–54 g/km | 17% |
| 55–59 g/km | 18% |
| 70 g/km | 21% |
| 90 g/km | 24% |
| 110 g/km | 28% |
| 130 g/km | 32% |
| 150 g/km | 36% |
| 160 g/km and above | 37% |
Diesels without RDE2 add a 4% surcharge (max 37%). Other 2026/27 figures: van £4,170, van fuel £798, car-fuel multiplier £29,200, official rate of interest 3.75%, Class 1A 15%.
Worked examples (2026/27)
£40,000 petrol car, 110 g/km
Cash equivalent = £40,000 × 28% = £11,200. A higher-rate (40%) employee pays £4,480 income tax; the employer pays £1,680 Class 1A NIC.
£20,000 interest-free loan
Over the £10,000 threshold, so BIK = £20,000 × 3.75% = £750 taxable, less any interest you paid.
Frequently asked questions
What is a P11D form?
How is tax on benefits-in-kind calculated?
What is the Class 1A NIC rate for 2026/27?
What are the P11D deadlines?
Is an interest-free loan from my employer taxable?
Do I have to pay tax on private medical insurance from my employer?
What is the car fuel benefit for 2026/27?
Sources
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P11D vs P11D(b): What's the Difference and Who Files Which?
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