What Is a P11D? Benefits in Kind and Your Tax Explained

If your employer gives you benefits on top of your salary, such as a company car or private medical insurance, you may come across a form called a P11D. It matters because those benefits can affect how much tax you pay, and sometimes whether you are owed a refund. This guide explains what a P11D is, what goes on it, and how it affects you.

What is a P11D?

A P11D is a form your employer sends to HMRC at the end of the tax year. It reports the value of any benefits in kind you received, which are perks and benefits provided on top of your normal pay that are not put through payroll. HMRC uses it to work out the tax due on those benefits.

You may also receive a copy from your employer, usually by 6 July following the end of the tax year, so you can see what was reported.

What counts as a benefit in kind?

Common items reported on a P11D include:

• Company cars and the fuel provided for them.
• Private medical or dental insurance.
• Interest free or low interest loans from your employer.
• Living accommodation provided by your employer.
• Other perks such as gym memberships or certain expenses.

Each of these has a cash equivalent value, which is the amount HMRC treats as taxable.

How a P11D affects your tax

Benefits in kind are taxable, so HMRC adds their value to your income when working out your tax. In practice this usually changes your tax code, reducing your tax free allowance so the extra tax is collected through your pay. That is why your tax code can drop when you get a benefit like a company car.

What is the difference between a P11D and a P11D(b)?

A P11D reports the benefits for each employee. A P11D(b) is the employer’s summary form that reports the total Class 1A National Insurance the employer owes on those benefits. As an employee, the P11D is the one that concerns you.

Where a refund can come in

A P11D itself is about tax you owe on benefits, not a refund. But the wider point is that your tax code is built from many moving parts, including benefits, expenses and allowances. If your code is wrong, for example because work expenses you are entitled to have not been applied, you may have overpaid and be due a refund. It is always worth checking.

Frequently asked questions

Do I need to do anything with my P11D?

Usually you keep it for your records. If you complete a Self Assessment return, you use it to report your benefits. If your tax code looks wrong, it is worth checking.

Will a P11D mean I owe more tax?

Benefits in kind are taxable, so they generally increase the tax due, normally collected through an adjusted tax code rather than a separate bill.

My employer payrolls my benefits. Will I still get a P11D?

If benefits are taxed through payroll (payrolling), they may not appear on a P11D, because the tax is already being collected through your pay.

Could I still be owed a refund?

Yes. Benefits affect your code, but so do unclaimed work expenses. If reliefs you are entitled to are missing, you may have overpaid.

Check whether your tax code is right

Benefits, expenses and allowances all feed your tax code, and errors are common. If yours is wrong, you may have overpaid.

Start your claim with TaxPro and we will review your tax code and reclaim what you are owed, on a no win, no fee basis.