Benefit in Kind Calculator 2026/27

Calculate the income tax and employer National Insurance on your company benefits. Enter the benefits you receive to see your full P11D position.

Total P11D Value
£0
Select your benefits to calculate
Your Income Tax Due
£0
Employer Class 1A NI
£0
Monthly Tax Cost (You)
£0
Benefits Count
0
Select your benefits above to see your P11D calculation.
Benefit Breakdown
Benefit P11D Value Your Tax Employer NI
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P11D Value by Benefit
How Benefit in Kind Tax Works

A Benefit in Kind (BiK) is any non-cash perk your employer provides. HMRC assigns a P11D value to each benefit - this is the amount treated as additional taxable income.

You pay income tax on the total P11D value at your marginal rate. Your employer adjusts your PAYE tax code so the tax is usually collected gradually across the year rather than as a lump sum.

Your employer pays Class 1A National Insurance at 15% on the same P11D value. This cost falls entirely on the employer.

Certain benefits are fully exempt: one mobile phone, pension contributions, cycle to work, and childcare vouchers (if enrolled before October 2018).

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Benefit in Kind FAQs

When do I pay Benefit in Kind tax?
BiK tax is usually collected via PAYE throughout the tax year. HMRC adjusts your tax code to collect the estimated tax on your benefits, spreading the cost across your payslips. If your employer does not operate PAYE or your benefits are not included in your tax code, you may need to declare them on a Self Assessment tax return by 31 January.
What is a P11D form?
A P11D is a form your employer submits to HMRC by 6 July each year listing all taxable benefits and expenses provided during the previous tax year. You should receive a copy for your records. The total P11D value is used by HMRC to calculate how much income tax you owe · your employer also submits a P11D(b) to declare the Class 1A National Insurance they owe.
Can I opt out of benefits to avoid BiK tax?
Yes - if your employer allows it you can opt out of taxable benefits and avoid the associated tax. However if the benefit is valuable (such as private medical insurance worth £1,500/year) the tax cost is usually far less than the benefit itself. For a basic rate taxpayer a £1,500 medical premium creates a tax bill of only £300 · still leaving £1,200 of net benefit. Always weigh the tax cost against the real-world value of the perk.
What is Class 1A National Insurance?
Class 1A NI is paid by employers only · not employees · on the P11D value of most taxable benefits. The rate is 15% for 2026/27. If your employer provides private medical insurance worth £1,500, they pay £225 in Class 1A NI to HMRC. This cost is borne entirely by your employer and does not come out of your salary or affect your take-home pay.
What benefits are completely tax-free?
Several common perks are exempt from BiK tax: one mobile phone per employee, employer pension contributions, cycle to work scheme bikes and equipment, childcare vouchers (if joined before October 2018), on-site canteen meals available to all staff, workplace car parking, and trivial benefits costing under £50 each (up to £300/year for directors). The cycle to work scheme and salary sacrifice pension are particularly tax-efficient ways to receive benefits from your employer.

For informational purposes only · Not financial advice · Tax rates shown are for 2026/27 · Class 1A NI rate 15% · Official loan rate 2.25%