Your Step-by-Step Guide to Reporting Employee Benefits

Small business owner with employees? There’s a decent chance you’re providing some kind of benefit beyond their salary. Company car, private health insurance, maybe a gym membership or a low-interest loan. These are all taxable benefits (i.e. benefits in kind), and HMRC expects you to report them every year using form P11D.

The P11D is one of those annoying admin tasks that gets moved to the bottom of the pile, snoozed in your inbox or shifted in your calendar until suddenly it’s due tomorrow, you’ve got no idea what you’re supposed to be doing, and you’re frantically Googling “do I need to report a work laptop” at 11:58pm the night before the deadline.

Rather than put it off till the last minute (again), have a read below to find out what exactly you need to do (it’s not that bad), when it’s due and how to avoid the most common mistakes that trip people up every year.

What is a P11D?

A P11D is the form you use to report any expenses or benefits you’ve given to employees (or directors) that aren’t already processed through payroll. Non-cash perks like company cars, private medical insurance, interest-free loans over £10,000, living accommodation or expenses you’ve reimbursed that don’t have a dispensation or aren’t covered by an exemption.

Basically, if you’ve given an employee something of value beyond their salary and it hasn’t been taxed already, HMRC wants to know about it (of course they do!). They use the P11D to work out how much extra tax and National Insurance the employee owes on those benefits.

You need to submit a separate P11D for each employee who received benefits during the tax year (6th April to 5th April). If you have five employees and three of them got benefits, you’ll file three P11Ds.

When is a P11D due?

The P11D deadline is 6th July every year, and you need to file for the previous tax year (for example, for the 2025/26 tax year, you need to file by 6th July 2026).

You also need to give each employee a copy of their P11D by the same date, so they know what’s been reported and can check if their tax code is correct.

If you’re paying Class 1A National Insurance on the benefits (which you probably are), that’s due by 22nd July if you’re paying electronically, or 19th July if you’re paying by cheque. Most people pay electronically.

Miss the deadline? You’ll get penalties, so don’t do that.

What needs to be reported?

This is where it gets slightly messy, because the list of taxable benefits is long and full of exceptions. Here’s the full list if you want to take a peek, but these are the most common ones for small businesses:

Company cars If you provide a car for an employee’s personal use (including commuting), you need to report it. HMRC calculates the taxable value based on the car’s list price, CO2 emissions, and fuel type. If you’re also paying for fuel for private use, that’s a separate benefit you need to report.

Private medical insurance or health benefits If you’re paying for an employee’s private health cover, that’s a taxable benefit. Even if it’s a basic plan, it goes on the P11D.

Gym memberships If you’re paying for an employee’s gym membership directly, it’s a taxable benefit. (Though if you provide on-site gym facilities available to all employees, that’s usually exempt.)

Loans over £10,000 If you’ve loaned an employee more than £10,000 interest-free or at a low interest rate, the difference between what they’re paying and the official HMRC interest rate is a taxable benefit.

Living accommodation If you’re providing somewhere for an employee to live (and it’s not job-related accommodation like a caretaker’s flat), that’s reportable.

Expenses without a dispensation If you’ve reimbursed expenses that don’t qualify for exemption (like entertaining, non-business travel, or personal costs), those go on the P11D.

Assets you’ve given to employees If you’ve transferred ownership of something (like a laptop or phone) to an employee, the market value goes on the P11D.

What you don’t need to report: trivial benefits under £50, some types of work-related training, pension contributions, employer-provided bikes through cycle-to-work schemes, mobile phones (if it’s one per employee), and some working-from-home equipment.

How to file a P11D

You file P11Ds online through HMRC’s PAYE Online service, or you can ask your accountant or bookkeeper to help with this. You’ll need your employer PAYE reference and Government Gateway login. If you’ve never filed one before, you’ll need to register for PAYE Online first (again, ask your accountant!).

For each employee, you’ll enter details of every benefit they received during the tax year, along with the cash equivalent value. For things like company cars, HMRC has calculators to work out the taxable value. For other benefits, it’s usually the cost to you as the employer.

Once you’ve submitted the P11Ds, HMRC will send you a P11D(b); that’s the form showing how much Class 1A National Insurance you owe on the benefits. You then pay that by 22nd July.

Common pitfalls

The biggest mistake people make is not realising something needs to be reported. They assume that because they’ve given a benefit through payroll, or because it’s a small amount, it doesn’t need to be declared. If in doubt, check. HMRC’s guidance is actually pretty comprehensive, and your accountant should know.

Another common mistake is getting the valuation wrong. Company cars in particular trip people up because the calculation is complicated and depends on emissions, fuel type, and list price when new, not what you actually paid for it.

Third: forgetting to tell employees. You need to give each employee a copy of their P11D so they can check their tax code. If you don’t, and their tax code is wrong as a result, that’s on you.

And finally, missing the deadline. It’s 6th July. It’s always 6th July. Put it in your calendar now, because HMRC definitely isn’t flexible on this one.

Is there another way to record benefits?

Yes, it’s called payrolling benefits. which will be mandatory from 06th April 2027.Instead of filing P11Ds every year, you register the benefits with HMRC before April 2027 and process them through your regular payroll. Employees get taxed on the benefits in real time, and you don’t have to worry about year-end reporting for employees (employers will still need to file a Class 1A P11D to pay the employer NIC annually).

You can payroll most benefits (company cars, private medical insurance, gym memberships, loans), but not all of them. You still need to report things like living accommodation and certain loans on a P11D even if you’re payrolling other benefits.

If you’re giving the same benefits to employees year after year, payrolling is almost always easier. You register once with HMRC, your payroll software handles it from there, and you’re done. No July deadline, no separate forms, no Class 1A National Insurance calculation.

But if you’ve only got one or two employees with occasional benefits, filing a P11D once a year is probably simpler than setting up payrolling.

P11Ds aren’t complicated once you know what you’re doing, but they’re easy to get wrong if you’re not paying attention. Know what benefits you’re providing, understand what needs reporting, file by 6th July, and pay any National Insurance by 22nd July.