P Documents & Refunds
P11D Explained: Benefits in Kind
If you get a company car, private healthcare, or other perks from your employer, you'll receive a P11D. Here's how these benefits affect your tax code and take-home pay.
What is a P11D?
A P11D is an HMRC form used by your employer to report "Benefits in Kind" — goods or services provided to you for free or at a reduced cost. Because these benefits have a financial value, HMRC treats them as income, and you have to pay tax on them.
Common Benefits in Kind
The most common benefits that appear on a P11D include:
- Company cars and employer-provided fuel
- Private medical insurance (healthcare)
- Interest-free or cheap loans (such as season ticket loans over £10,000)
- Non-business travel expenses
- Living accommodation provided by your employer
How a P11D affects your tax code
You don't usually pay the tax for these benefits directly out of your bank account. Instead, HMRC collects the tax by adjusting your tax code.
They do this by reducing your tax-free Personal Allowance. For example, if you have a standard allowance of £12,570 (tax code 1257L), and your employer provides health insurance worth £1,000, HMRC will reduce your allowance to £11,570. Your new tax code would become 1157L.
The K Tax Code
If the value of your company benefits is higher than your Personal Allowance, your allowance goes below zero. When this happens, HMRC gives you a K tax code.
A K code means your employer will add a notional amount to your taxable pay to ensure HMRC collects the tax owed on your benefits.
What if my employer payrolls my benefits?
Many employers now use "payrolling of benefits". This means they add the cash equivalent of the benefit to your pay and deduct the tax through PAYE in real-time each month.
If your employer payrolls all your benefits, they do not need to send you a P11D. HMRC plans to make the payrolling of benefits mandatory by April 2026, which will eventually phase out the P11D form entirely.