A P11-what?

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Business

Every year, as one payroll year ends and the next begins, there’s a small flurry of deadlines to keep track of. Final payroll reports by 5 April. P60s out to staff by the end of May. And then, in July, the one that makes people stop and reread the sentence: the P11D.

“A P11-what?”

D. And the good news is that not everyone has to file one.

What a P11D actually is

A P11D is an annual form employers file for any director or employee who’s received taxable benefits in kind on top of their salary. One form per person. It sets out the cash equivalent of those benefits, because HMRC treats them as if they were extra pay. So there’s tax to pay on them, plus National Insurance, though the National Insurance (Class 1A) is paid by the company, not the employee.

The classic examples are a company car and private healthcare. More broadly, if the company pays for something an employee then gets to use privately, it usually needs to go on a P11D: think low-interest loans, assets with significant personal use, or non-business travel and entertainment the company has covered.

One thing that trips people up: most routine business expenses no longer need reporting at all. Travel, parking, professional subscriptions and the like are covered by an exemption and stay off the form. It’s the genuinely personal benefits that count.

The dates that matter

P11Ds are filed by the employer, not the employee, and the deadline is the same every year: 6 July following the end of the tax year. So benefits provided in the 2025/26 tax year need reporting by 6 July 2026. (Worth putting in the calendar now, while you’re thinking about it.)

The tax and National Insurance that fall due then need paying too. Class 1A National Insurance on the benefits is due by 22 July, or 19 July if you’re paying by post.

What happens if you get it wrong

HMRC takes a dim view of P11Ds that are late or wrong. File late and the penalties run at £100 per month for every 50 employees. Get something wrong and, if HMRC decides it was a deliberate attempt to mislead, there can be penalties on top.

The sensible protection is to be thorough at the point of filing. Go through every benefit the company has provided and make sure it’s captured. Do that, and a genuine slip is far more likely to be treated leniently than a gap that looks like a shrug. We send our payroll clients a checklist for exactly this reason, so there’s a clear record that every transaction was considered.

A change worth knowing about

The P11D isn’t going to be with us forever in its current form. From April 2027, most benefits in kind will have to be reported through payroll in real time rather than on a P11D after the year end. It’s being phased in, so the P11D still matters for now, but if you run payroll it’s worth being aware the ground is moving.

Greeting Stacey Mcveighty Director Change Accountants 2

Here’s how we help

If you’re a director with a company car, or you provide staff with private healthcare or other perks, there’s a fair chance you need to file P11Ds. It’s part of our payroll service, and we’ll handle the form, the deadline, and the conversation with HMRC if one’s needed. (If company cars are on your mind, our guide to the pros and cons of a company car is a good companion read.)

Unsure?

If you’re not sure whether you need to file, get in touch – we’ll tell you either way.

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The information in this article was correct on 5 August 2026. It should not be used instead of professional advice.