Offering employee benefits such as company cars, private medical insurance, or interest-free loans is an attractive way to retain talent over the long term. However, employers need to report these benefits to HMRC on the P11D Form.
Â
It is an important part of payroll obligations according to the UK tax calendar. Incorrect filing or missing the 6 July deadline can lead to penalties. Understanding these rules is necessary for any employer offering workplace benefits.
Â
TAJ Accountants will explain everything that UK employers & employees need to know about P11D forms to ensure accurate and timely submissions. Read attentively to know what a P11D is, who will pay the P11D, and how to calculate the value. And stay tuned!
What is a P11D Form?
A P11D form is a tax document used to report to HMRC about benefits and non-exempt expenses to employees, directors, or office holders. Employers provide these benefits as additional facilities that are not included in employees’ salaries or wages.
Â
Benefits include rewards like company cars, health insurance, loans, and other non-cash perks. These are taxable. So employers have to submit this form each year to HMRC, adding the value of the given benefits. HMRC calculates the total amount of tax and National Insurance that the employees have to pay on their salaries.
Types of Benefits Are Reported on a P11D
Many employers reward employees with various types of extra benefits in addition to their salary. These can vary depending on the nature of the relationship with businesses. According to the HMRC, common benefits and expenses include:
Â
- Assets transferred (cars, property, goods or other assets)
- Payments made on behalf of the employee
- Vouchers and credit cards
- Living accommodation
- Mileage allowance payments
- Cars and car fuel
- Vans and van fuel
- Interest-free, low-interest, and national loans
- Private medical treatment or insurance
- Qualifying relocation expenses, payments, and benefits
- Services supplied
- Assets placed at the employee’s disposal
- Other items (including subscriptions and professional fees)
- Expenses payments made on behalf of the employee
Who Needs to Submit a P11D?
Employers send the P11D forms to the HMRC, including employees’ additional benefits, at the end of every tax year with their regular salaries. Also, this includes their family members’ payments or benefits, such as spouses or their children.
Â
You have to use a separate form for each employee. If you pay tax on all their benefits through your payroll, you won’t need to submit a P11D form.
P11D Submission Deadlines
The P11D submission date is around July 6th, following the end of the tax year, which runs from April 6th to April 5th. For example, for the tax year 2026-2027, the P11D forms must be sent by July 6, 2027.
P11D Exemptions
Some employee benefits do not need to be reported on a P11D. These include benefits covered by a valid PAYE Settlement Agreement (PSA), where the employer pays the tax directly to HMRC. Trivial benefits worth £50 or less per employee are also exempt, provided they are not cash, cash vouchers, or rewards for work.
Certain exempt business expenses, such as qualifying travel and subsistence costs, are also excluded. Benefits covered by specific statutory exemptions, including one mobile phone provided for business use and workplace parking, do not need to be reported on a P11D.
How is P11D Tax Calculated in the UK?
Each benefit reported on a P11D is given a cash equivalent value. This is the taxable value that HMRC assigns to the benefit, based on specific rules, and it is added to the employee’s taxable income. It is not necessarily the amount the employer paid for the benefit.
The employee pays Income Tax on this value through their tax code or Self Assessment, while the employer pays Class 1A National Insurance, charged at 15% for the 2026/27 tax year.
For example, if the total taxable benefits are £20,000, the employer will owe £3,000 in Class 1A NIC, payable by 22 July. The total Class 1A NIC liability for all employees must be reported on the P11D(b), which is submitted alongside the individual P11D forms.
What’s a P11D(b) Form?
A P11D(b) is a separate form used to report the total Class 1A National Insurance Contributions (NICs) an employer owes on taxable employee benefits. It summarises the benefits provided to all employees and calculates the total Class 1A NIC due.
The P11D and P11D(b) work together. A P11D reports the taxable benefits for each employee, while the P11D(b) reports the employer’s total Class 1A NIC liability for those benefits. Even if all benefits have been paid, you may still need to submit a P11D(b) to declare the NIC due.
If HMRC expects you to file a P11D(b) but you have no taxable benefits to report, you should submit a nil return rather than ignoring the notice
Stay Updated
Get expert accounting advice tailored to your business needs
Mandatory Payrolling of Benefits: What's Changing?
The traditional P11D reporting system is gradually being replaced by mandatory benefits payrolling. Under HMRC’s phased rollout, the first changes take effect from 6 April 2027, with the remaining benefits following from 6 April 2028.
From April 2027, employers must pay PAYE on the taxable value of company cars and fuel, vans and van fuel, and private medical insurance instead of reporting them on a P11D. These benefits account for the majority of benefits in kind provided in the UK.
All other taxable benefits can continue to be reported on P11D forms during the 2027/28 tax year, unless the employer chooses to pay them voluntarily. From April 2028, mandatory payrolling will extend to most of these remaining benefits.
For now, beneficial loans and living accommodation are excluded from the mandatory regime and can only be paid for voluntarily.
During the 2027/28 transition year, many employers are likely to operate a hybrid system, with some benefits reported through payroll and others still reported on P11D forms. Clear communication with employees will be essential to avoid confusion.
Common Mistakes on a P11D Form
Even small mistakes on a P11D can lead to penalties, additional tax, and extra work to correct them. Some of the most common errors include:
- Failing to report taxable benefits such as private medical insurance, beneficial loans, gym memberships, or living accommodation.
- Calculating the wrong cash equivalent value, particularly for company cars, where COâ‚‚ emissions and list price affect the taxable benefit.
- Leaving the cash equivalent field blank after entering the cost of the benefit.
- Reporting only the private-use portion of a mixed-use benefit instead of the full taxable value.
- Forgetting to indicate that the employee is a company director, where applicable.
- Attempting to correct errors using paper forms instead of HMRC’s online amendment system.
- Underestimating the consequences of errors, which can result in penalties of up to £3,000 per form, plus any outstanding Class 1A National Insurance.
Carefully reviewing your P11D submissions can help you avoid these common pitfalls. Staying organised, maintaining accurate records, and understanding HMRC requirements will make the process smoother and reduce the risk of costly mistakes.
Conclusion
From April 2027, company cars, fuel, vans, and private medical insurance must be reported through payroll, with most remaining benefits following from April 2028. Until then, employers must continue to meet the current P11D reporting requirements accurately.
Getting your P11D reporting right helps you avoid penalties, unnecessary tax liabilities, and compliance issues. If you’re unsure about your obligations or need support with P11D forms, book a free consultation with TAJ Accountants. We can help ensure your business remains fully compliant with HMRC requirements throughout the transition.
Frequently Asked Questions
For the 2025/26 tax year, the P11D filing deadline is 6 July 2026. Employers who have provided taxable benefits that were not processed through payroll must submit their P11D forms electronically by this date and provide a copy to each affected employee.
If you miss the deadline, HMRC may charge a penalty of £100 per 50 employees for each month or part month that the P11D(b) remains outstanding. Inaccurate returns can also attract penalties of up to £3,000 per form, in addition to any tax or National Insurance due.
If all taxable benefits have been registered with HMRC and processed through payroll, you will generally not need to submit a P11D for those benefits. However, you will usually still need to file a P11D(b) and pay any Class 1A National Insurance Contributions due.
For the 2026/27 tax year, the Class 1A National Insurance rate is 15%. It is calculated by applying the 15% rate to the total cash equivalent value of all taxable benefits provided to employees.
Yes, in some cases. From April 2027, P11D forms will no longer be required for benefits that must be payrolled. However, beneficial loans and living accommodation remain outside the mandatory payrolling regime, so P11Ds will still be required for these benefits.
During the transition, employees may notice changes to their tax codes, while tax is also deducted through payroll for newly added benefits. Explaining these changes in advance can help reduce confusion and minimise employee queries.
