How to Read Your P11D: Understanding Benefits in Kind in 2026

What a P11D actually is

A P11D is a form your employer files with HMRC to report the benefits in kind (sometimes called "expenses and benefits") you received during a tax year on top of your normal salary. A benefit in kind is anything of value your employer provides that isn't cash pay — private medical insurance, a company car, a season-ticket loan, accommodation, or even a Christmas hamper above the trivial limit.

The form has one job: to put a cash-equivalent value on each non-cash perk so HMRC can tax it. You're being taxed because the benefit is, in effect, part of your reward package — HMRC treats £1,000 of medical cover much like £1,000 of salary for income tax purposes (though not for employee National Insurance, which is a key difference we'll come back to).

Two related forms often confuse people:

• P11D — the individual list of your benefits. This is the one you receive.
• P11D(b) — the employer's summary return that totals everyone's benefits and calculates the Class 1A National Insurance the employer owes (15% for 2025/26 onward). You never see this one.

Your employer must give you your P11D by 6 July following the end of the tax year. For the 2025/26 year (which ended 5 April 2026), the deadline is 6 July 2026.

"Payrolling benefits" — why you might not get a P11D at all

A growing number of employers now payroll their benefits instead of filing a P11D. This means the cash value of your benefits is added to your taxable pay each payday and taxed in real time, rather than collected later through a tax-code adjustment.

If your benefits are payrolled, you'll see them itemised on your payslip and you generally won't receive a separate P11D for those benefits. From April 2026, HMRC has been moving employers toward mandatory payrolling of most benefits in kind, so the standalone paper P11D is gradually being phased out. Either way, the tax on the benefit is the same — only the timing and the paperwork differ.

If your benefits are payrolled, the figures show up on your payslip rather than a P11D. Our guide to reading your UK payslip walks through where to find them.

How a benefit hits your tax code

When benefits aren't payrolled, HMRC collects the tax by reducing your tax code. The standard 2025/26 code is 1257L, representing the £12,570 personal allowance you can earn tax-free. HMRC takes the value of your benefits off that allowance.

Here's a simple worked example. Suppose your only benefit is private medical insurance worth £1,200:

Your tax-free pay drops by £1,200 for the year. At the basic rate of 20% that's £240 of extra tax (£20/month). At the higher rate of 40% — which applies to income above £50,270 — it's £480 (£40/month).

If your benefits are large enough to wipe out your whole personal allowance, HMRC issues a K-code, which adds to your taxable pay instead of subtracting. K-codes are unusual and always worth investigating. We cover them in detail in our tax codes explained guide.

What the boxes on the form mean

A P11D is divided into lettered sections (A to N). Most employees only ever see two or three filled in. The ones that come up most often:

Section I — Private medical and dental treatment

The single most common benefit. The figure is what your employer paid for your cover (and your family's, if included). It's taxed in full at your marginal rate.

Section F — Cars and car fuel

Company cars are valued on a percentage of the car's list price (the "P11D value"), set by its CO₂ emissions. A pure electric car carries a very low benefit rate, which is why salary-sacrifice EVs are so popular — see our EV salary sacrifice case study. A high-emission petrol car can be taxed on 37% of its list price. If your employer also pays for private fuel, that's a separate, often expensive, charge.

Section H — Beneficial loans

If your employer lends you money interest-free or below the official rate (for example a season-ticket loan), the "saved" interest is a benefit — but only once the total loan exceeds £10,000 at any point in the year. Under that threshold, there's nothing to report.

Section M — Other items

A catch-all for things like professional subscriptions paid on your behalf, gym membership, or relocation costs above the exempt limit.

Section N — Expenses payments

Reimbursed expenses that aren't covered by an exemption. Genuine business expenses (most travel, subsistence) are usually exempt and shouldn't appear here at all.

National Insurance: the part most people miss

This is where benefits in kind differ from straight salary, and it works in your favour.

When you take cash salary, you pay employee National Insurance — 8% on earnings between £12,570 and £50,270, then 2% above that. Your employer also pays employer NIC at 15% on your pay above the £5,000 secondary threshold.

When you receive a benefit in kind, you pay income tax but no employee NIC. The employer instead pays Class 1A NIC at 15% on the benefit's value. So for you, a £1,000 benefit costs only the income tax — £200 at basic rate or £400 at higher rate — whereas £1,000 of extra salary would cost income tax plus employee NIC.

That NIC saving is the whole logic behind salary sacrifice and many benefit schemes. If you're weighing up salary versus benefits, our take-home pay calculator and National Insurance calculator let you see the difference on your own numbers.

How to check your employer got it right

A surprising share of tax codes carry stale or phantom benefits — a company car you handed back, medical cover that ended, a loan you repaid. Because the wrong figure can quietly cost you tax every month, it's worth a five-minute check.

1. Compare the P11D to reality. Did you actually have each benefit listed, for the period stated? A car you returned in October shouldn't be valued for the full year.
2. Check the values. Medical cover should match your premium. A company-car figure should match the list price and emissions band of the car you actually drove.
3. Cross-check your tax code. Find your current code on a recent payslip or in your Personal Tax Account. Multiply the number by 10 to get your tax-free amount, then see whether the benefit deductions look right. Our tax codes guide explains the letters.
4. Watch for double-counting. If a benefit is being payrolled and also showing as a deduction in your tax code, you're paying the tax twice. This is a classic error in the year an employer switches to payrolling.

You can model what your take-home should be — with the benefit included — using the income tax calculator, then compare it to your actual payslip.

Common P11D errors to look out for

• Phantom company car still valued after you returned it.
• Medical cover carried forward a year after the policy lapsed.
• A repaid loan still generating a beneficial-loan charge.
• The wrong car — employers occasionally report the list price of a previous vehicle.
• Double taxation when a benefit is both payrolled and coded.
• Reimbursed business expenses appearing as a taxable benefit when they're actually exempt.

If you spot a mistake, tell your employer first — they file the form and can submit a correction. To fix the tax code in the meantime, update your estimated benefits in your Personal Tax Account at gov.uk, or call HMRC on 0300 200 3300. If you're in Self Assessment, you simply enter the correct figures on your return and the system reconciles everything.

What happens to the tax you owe

For most people the answer is reassuring: nothing extra to do. HMRC has already adjusted your code, so the tax on your benefits drips out through PAYE across the year. You won't get a bill.

You might see a separate calculation if:

• A benefit wasn't coded in time, leaving an underpayment that HMRC collects through next year's code (this is shown on a P800 reconciliation).
• You complete Self Assessment, in which case your benefits go in the employment section and the tax is settled through your return.
• Your benefits changed mid-year and the code didn't keep up.

If HMRC sends you a new tax code off the back of a P11D, our coding notice guide explains every line and how to respond.

A quick worked example

Priya earns £45,000 and has two benefits: private medical cover (£900) and a small interest-free season-ticket loan that never exceeds £10,000 (so no charge). Her P11D shows £900.

• HMRC reduces her allowance from £12,570 to £11,670 → code 1167L.
• As a basic-rate taxpayer, the extra tax is £900 × 20% = £180/year (£15/month).
• She pays no employee NIC on the benefit.
• Had she taken £900 of extra salary instead, she'd have paid £180 income tax plus £72 employee NIC (8%) — £252 in total.

The benefit route saves Priya £72 versus cash. That gap is exactly why benefits in kind exist — and why it's worth understanding what your P11D is telling you.

Try the calculators

Sources

• HMRC: P11D Guide
• HMRC: Expenses and benefits for employers
• HMRC: Tax on company benefits
• HMRC: Income Tax rates and Personal Allowances
• HMRC: National Insurance rates and categories