What is a P11D? UK Guide to HMRC Form & Submission

If you employ people in the UK, there’s a fair chance your accountant has mentioned a P11D form and your eyes have glazed over. It’s one of those compliance tasks that feels abstract until HMRC sends a penalty letter — then it becomes very real, very fast. This guide cuts through the jargon: what the form actually is, who needs to deal with it, and exactly what you need to do before the 6 July deadline.

Submitted by: Employers ·
Reported to: HMRC ·
Purpose: Expenses and benefits ·
Frequency: Annually ·
Applies to: Directors and employees

The table below summarises the essential parameters you need to track for every P11D submission cycle.

What is a P11D?

A P11D is an annual form that UK employers submit to HM Revenue & Customs (HMRC) to report taxable benefits — commonly called “benefits in kind” (BIK) — provided to employees or directors during the tax year. These are non-cash perks that sit outside your regular payroll, things like a company car, private health insurance, or gym membership. Each P11D form covers one employee, and the employer completes and files them on behalf of the entire workforce. The amount shown on the P11D represents additional employment income and is taxable — meaning the employee may owe extra income tax, and the employer must pay Class 1A National Insurance on the total benefit value.

Purpose of the P11D form

The form exists so HMRC can keep track of employment income that never passes through PAYE in the normal way. By requiring employers to report every taxable benefit, the tax authority ensures employees pay the correct amount of income tax across the year rather than discovering a large bill at self-assessment time. The P11D values also allow HMRC to update an individual’s tax code for the following year, so regular tax deductions will be closer to their expected overall liability, according to BDO (tax advisory firm).

When it applies

P11D filing is required when an employee receives benefits that exceed certain de minimis thresholds — HMRC sets these low deliberately, so in practice most employer-provided perks trigger a P11D. Crucially, the form is mandatory for all company directors regardless of the value of any benefits they receive, even if the total is minimal. Since April 2023, P11D and P11D(b) forms must be submitted online, except where an employer has been deemed digitally excluded, according to AXA UK (insurance provider).

The implication: directors who assume their modest benefits fall below the reporting threshold will still face a filing requirement — HMRC treats director status as an automatic trigger for P11D obligations regardless of benefit value.

What is a P11D form used for in the UK?

Put simply, the P11D form is the official record of every taxable benefit an employee receives that wasn’t processed through your payroll software. HMRC uses these values to calculate how much extra income tax and National Insurance Contributions (NICs) are actually owed on those benefits. The process protects the tax system by closing the loophole where employees could receive valuable perks without paying any tax on them.

Reporting taxable benefits

Reportable benefits span a wide range. Common examples include company cars and the private fuel provided for them, accommodation provided by the employer, gym memberships, private school fees, meals provided by the employer, self-assessment fees paid by the company, childcare costs, private health insurance, and non-business travel and entertainment expenses, according to AXA UK (insurance provider). The P11D must also include benefits provided to members of employees’ families — spouses and children, for instance. When calculating the value of a company car, employers should enter the list price of the car from the day before first registration, including VAT, delivery charges, and number plates, according to GOV.UK (official HMRC guidance). Employers should also include the list price of car accessories fitted to the car, like alloy wheels, if over £100.

Expenses covered

Not every employer expense needs to appear on a P11D. The rule is that the benefit must be taxable — meaning it’s included in the employee’s total employment income for income tax purposes. If HMRC has given an exemption or the benefit falls below a certain threshold, it can often be left off the form. For example, trivial benefits worth £50 or less are generally exempt, according to GOV.UK (official HMRC guidance). A separate P11D form should be used for each employee, and each form should contain details of all non-exempt expense payments and benefits given for that employee.

The pattern: HMRC expects employers to self-assess benefit values and report them voluntarily, meaning the accuracy of your filings depends entirely on your internal record-keeping throughout the year.

Who produces a P11D?

The employer is always responsible for completing and submitting P11D forms — never the employee. This applies even if you use an accountant, bookkeeper, or payroll bureau: the legal responsibility sits with you as the employer. In practice, many businesses delegate the technical preparation to their accounting team or software provider, but you remain answerable to HMRC if the forms are late, incomplete, or inaccurate.

Employer responsibilities

Employers must identify which employees received taxable benefits during the tax year and ensure those benefits are correctly valued and reported on the appropriate P11D forms. For the 2024/25 tax year, P11D forms must be filed by 6 July 2025, according to HLCA (accountancy firm). Employers are required to pay Class 1A National Insurance contributions on the value of taxable benefits reported, with the payment deadline falling on 22 July for electronic payments or 19 July for cheque payments, according to ANNA Money (business accountancy platform). P11D forms must be completed for employees earning above the National Insurance threshold, for directors and shareholders, and for employers with IR35 obligations, according to Employment Hero (HR software provider).

Employee receipt

While employees don’t file the P11D themselves, they have an important role in the process. Employers must provide copies of P11D forms to each employee who received benefits by 6 July — the same deadline as the HMRC submission. Employees need this copy to complete their self-assessment tax return if required, or to claim a repayment of tax if they’ve overpaid, according to Hartley Fowler (chartered accountants). The Low Incomes Tax Reform Group notes that for tax year 2025/26, employees will receive P11D forms by 6 July 2026.

What this means: if your accountant makes an error on the P11D, HMRC penalties land on your business, not theirs — so maintain your own records as a safety net regardless of who prepares the forms.

Do I need a P11D?

Most UK employers will need to file P11D forms at some point, but the requirement isn’t universal. It depends on whether you provide taxable benefits to your staff, and whether those benefits cross the HMRC reporting thresholds. Understanding the rules here prevents you from either filing unnecessary paperwork or — more dangerously — missing a filing and triggering a penalty.

Thresholds for filing

There’s no single threshold that automatically triggers a P11D requirement for every benefit. Instead, HMRC applies different rules for different types of benefit, and some are exempt entirely if their value falls below a set amount. The de minimis rules are generous for certain categories — trivial benefits worth £50 or less, or certain workplace sport facilities, for instance — but most meaningful employer perks will exceed these limits. For company cars, the benefit in kind is calculated based on a percentage of the list price, which often results in a reportable figure even for modest vehicles.

Exemptions

An important exemption exists for employers who have registered to “payroll” their benefits. Under this alternative approach — available since 6 April 2016 — employers can report benefits and deduct the correct tax through their payroll software each pay period, without needing to submit P11D forms at all, according to Low Incomes Tax Reform Group (tax advice charity). If you’ve elected to use the payrolling method and have correctly deducted tax under PAYE throughout the year, a P11D is not needed for those benefits, according to GOV.UK (official HMRC guidance). This option is increasingly popular because it removes the end-of-year rush and simplifies the process for everyone.

The catch: payrolling requires advance registration with HMRC — you can’t decide mid-year to skip P11D filing if you haven’t opted in before the tax year begins.

How to generate a P11D

Generating a P11D isn’t a single click — it requires collecting the right data throughout the tax year, valuing benefits correctly, and submitting through the proper channel by the deadline. The process can feel daunting the first time, but it becomes routine once you’ve built the right systems. Here’s how to work through it step by step.

Steps to complete

• Step 1 — Collect benefit data throughout the year: Employers should gather relevant information surrounding employee benefits received during the tax year before submitting P11D, according to Employment Hero (HR software provider). This means keeping records of every company car provided, private health insurance policy, gym membership, or other perk — including the dates and values involved.
• Step 2 — Calculate benefit values: Each type of benefit has its own valuation rules. For a company car, you use the list price (including VAT and delivery charges) multiplied by an HMRC-prescribed percentage based on the car’s CO2 emissions. For other benefits, fair market value typically applies. AXA UK provides detailed guidance on valuing car accessories and other common benefits.
• Step 3 — Complete the P11D form: Each P11D form should contain details of all non-exempt expense payments and benefits given for the employee concerned, according to GOV.UK (official HMRC guidance). A separate P11D form should be used for each employee. The P11D(b) form is the employer Class 1A NIC declaration that must be submitted alongside P11D forms, reporting the total taxable benefits and expenses provided across all employees for the tax year, according to ANNA Money (business accountancy platform).
• Step 4 — Submit online: Employers with fewer than 500 employees must fill in and submit P11D forms through HMRC’s PAYE Online service, according to GOV.UK (employer reporting guidance). Employers with more than 500 employees must submit through approved payroll software. Both P11D and P11D(b) forms are mandatory for UK employers, according to Employment Hero (HR software provider).

Submission deadline

The P11D submission deadline is 6 July following the tax year end — meaning for the 2024/25 tax year (6 April 2024 to 5 April 2025), forms must reach HMRC by 6 July 2025, according to Mindspace Outsourcing (accountancy firm). Class 1A National Insurance payments must then be made by 22 July if paying electronically, or 19 July if paying by cheque, according to Prager Metis (accountancy firm). Employers must provide copies of P11D forms to each employee who received benefits by that same 6 July deadline.

“HMRC allows amendments to P11D forms after submission if errors are discovered by the employer.”

— ANNA Money (business accountancy platform)

“P11D information allows HMRC to update an individual’s tax code for the following year so regular tax deductions will be closer to expected overall liability.”

— BDO (tax advisory firm)

“Employers with fewer than 500 employees must fill in and submit P11D forms through HMRC’s PAYE Online service.”

— GOV.UK (official employer reporting guidance)

Related reading: HMRC Savings Tax Letters

Employers submitting P11D forms for company cars should track the latest HMRC advisory fuel rates to calculate precise taxable fuel reimbursements.

Frequently asked questions