What Is a P11D? UK Benefits in Kind and Class 1A Explained
A P11D is the form an employer files to tell HMRC about the taxable benefits in kind and expenses it provided to a director or employee during the tax year, things like a company car, private medical cover or an interest-free loan (GOV.UK). Filed with it is a P11D(b), which declares the employer's Class 1A National Insurance bill on those benefits. If you run a small company and give yourself or your staff anything beyond salary, these are the forms that put a value on it and tax it. This guide covers what belongs on each form, who has to file, the 6 July deadline, what a late return costs, and the switch to real-time payroll reporting that starts in April 2027. If you are tracking who got what, a clean record of your business expenses is where the figures come from.
Key Takeaways
- A P11D reports the cash-equivalent value of benefits in kind and non-exempt expenses an employer gave each director or employee; the employer files one P11D per person who received them.
- The P11D(b) is a separate form that totals the Class 1A National Insurance the employer owes on those benefits, charged at 15% for 2025/26 and 2026/27.
- Both are due by 6 July after the tax year ends on 5 April, and the Class 1A must be paid by 22 July (19 July by cheque).
- A late P11D(b) costs £100 per 50 employees for each month it is late, plus interest on any Class 1A paid late.
- From April 2027, most benefits move to real-time payroll reporting and the P11D is phased out, starting with company cars, fuel and medical benefits.
What a P11D reports
A P11D records the taxable value of the "benefits in kind" an employer gave someone on top of their salary. A benefit in kind is something with a personal cash value that was not taxed through normal payroll: a company car available for private use, car fuel, private medical insurance, a gym membership, living accommodation, or a loan on which little or no interest was charged. HMRC calls the figure that goes on the form the cash equivalent, and the employer works it out under set rules for each benefit type (GOV.UK). You complete a separate P11D for each director or relevant employee who received benefits.
Not everything an employer pays for lands on a P11D. Since 6 April 2016, genuine business expenses you reimburse, such as business travel, subsistence on a work trip, and professional subscriptions, are covered by an exemption and need no reporting at all (GOV.UK). The line that matters is personal benefit: reimbursing an employee for a train fare to a client meeting is exempt, while putting their personal phone bill or weekly shop on the company card is a reportable benefit. Getting that split right is the whole job, and it depends on knowing what each receipt was for.
P11D vs P11D(b): two forms, two jobs
The two forms arrive together and get confused, but they answer different questions. The P11D values the benefits for the employee's Income Tax. The P11D(b) is the employer's own return, declaring and paying the National Insurance the employer owes on the same benefits.
| Form | What it does | Who it is about | Who pays |
|---|---|---|---|
| P11D | Reports the cash-equivalent value of each benefit in kind | One per employee or director who got benefits | The employee pays Income Tax on the value |
| P11D(b) | Totals the Class 1A National Insurance due on all those benefits | The employer, one return for the whole payroll | The employer pays the Class 1A |
Class 1A National Insurance is an employer-only charge. There is no matching deduction from the employee, so the benefit costs the business the NIC on top of the benefit itself. For 2025/26 and 2026/27 the Class 1A rate is 15%, the same as the employer's secondary Class 1 rate (GOV.UK).
Here is how the P11D(b) works in practice. Say your company gives one employee a company car with a cash equivalent of £6,000 for the year and private medical cover worth £800. The total benefit is £6,800. The employee pays Income Tax on that £6,800 through their tax code, and the company pays Class 1A of £6,800 at 15%, which is £1,020, reported and paid on the P11D(b). Those are the only numbers the P11D(b) needs: the total benefits figure and the NIC on it.
Who has to file a P11D?
An employer files P11Ds when it has provided taxable benefits that were not already taxed through payroll. That includes a one-person limited company whose only "employee" is its director: if the company pays for the director's private medical cover or provides a company car, the company reports it. If you are a sole trader with no staff, there is no employer and no P11D; your own costs go through Self Assessment instead, which is a different system entirely.
Two situations remove the P11D but not the P11D(b):
- You payroll the benefits. If you tax benefits in kind through payroll in real time (called payrolling), the Income Tax is collected as you go, so you do not file a P11D for those employees. You still file a P11D(b) to pay the Class 1A (GOV.UK).
- The benefit is exempt. Items covered by the 2016 expenses exemption are not benefits in kind and are not reported.
If you provided no taxable benefits at all in the year, you file nothing. HMRC may still send a reminder to submit a P11D(b); you can tell them online that no return is due so the system stops expecting one.
The P11D deadlines and how to file
The UK tax year ends on 5 April, and the P11D timetable runs from there. Miss a date and the penalties below start.
| What | Deadline |
|---|---|
| File P11D and P11D(b) with HMRC | 6 July after the tax year ends |
| Give each employee a copy of their P11D | 6 July |
| Pay the Class 1A National Insurance | 22 July (19 July if you pay by cheque) |
For the 2025/26 tax year, that meant filing by 6 July 2026 and paying by 22 July 2026 (GOV.UK). The same pattern repeats each year: 6 July 2027 and 22 July 2027 for 2026/27.
You file online, through HMRC's PAYE Online service or commercial payroll software. HMRC no longer accepts paper P11D or P11D(b) forms unless you are digitally exempt from online payroll reporting or have stopped trading (GOV.UK). Give your employees their copy by the same 6 July date, because they need it to check their tax and, if they file a return, to enter the benefit figures.
What a late P11D costs
A late P11D(b) carries a fixed penalty of £100 for each 50 employees, for every month or part month the return is late (HMRC manual DMBM570080). A small company with a handful of staff is in the first band, so one missed return running two months late is £200, and the charge keeps building until the return is in. HMRC calculates these monthly and issues the penalty notices quarterly.
Paying the Class 1A late is charged separately. Interest runs on the unpaid amount from the due date, so a payment that arrives after 22 July accrues interest on top of the bill. Filing an incorrect return can also attract a penalty where the error was careless or deliberate. The cheapest P11D is the one filed on time with the right figures, which is far easier when the benefit values were tracked through the year rather than reconstructed in June.
The big change: payrolling becomes mandatory from April 2027
The P11D is on its way out. From April 2027, reporting most benefits in kind moves from the year-end P11D into real-time payroll, so the Income Tax and Class 1A are collected through payroll as the benefit is provided. HMRC is phasing this in. The first phase, from April 2027, covers company cars, car fuel, vans, van fuel and employer-provided medical benefits. Most remaining benefits follow from April 2028 (GOV.UK).
A few benefits are not caught yet. Employer-provided loans and living accommodation stay on the P11D for now, with a mandatory date to be confirmed. HMRC has said employers will be able to register to payroll these voluntarily, and the P11D and P11D(b) are kept for them in the meantime. The practical point for a small employer: 2025/26 and 2026/27 are still P11D years, so the forms and the 6 July deadline above apply now, and the shift to payroll reporting is what you plan for next. Payrolling a benefit changes an employee's tax code and how the value appears on their payslip, which is worth flagging to staff in advance; our guide to UK tax codes explains what the codes mean.
Where SparkReceipt fits
SparkReceipt does not run payroll or file a P11D, and it is not a replacement for payroll software. What it does is hold the record the P11D is built from. The hardest part of a P11D is separating a genuine business expense from a personal benefit, and that decision lives on the receipt: a hotel on a client trip is exempt, a weekend away is a benefit. SparkReceipt scans each receipt, reads the vendor, date, amount and tax, and files it against the right category, so when July comes you can see what was business and what was personal rather than guessing from a bank statement.
When it is time to pull the figures together, you export a filtered report to Excel, CSV or PDF for your accountant, or hand over the underlying images. For companies that reimburse staff or track costs per person or project, the data you need for each employee is already captured and categorised. It keeps the year-round record clean; your accountant or payroll software turns it into the filed return. See pricing for what each plan includes.
FAQ
Is a P11D the same as a P60 or a P45? No. A P11D lists taxable benefits in kind. A P60 is a year-end summary of pay, tax and National Insurance, and a P45 is what you get when you leave a job. Our guide to the P60 sets out how the three differ; an employee can receive both a P60 and a P11D in the same year.
Who pays the tax on a P11D benefit? Both sides pay something. The employee pays Income Tax on the benefit's cash-equivalent value, usually collected through an adjusted tax code. The employer pays Class 1A National Insurance on the same value, at 15% for 2025/26, declared on the P11D(b).
Do I need a P11D if I reimburse an employee's travel? Usually not. Genuine business travel and subsistence reimbursed to an employee are covered by the expenses exemption introduced in April 2016, so they are not reported. Personal spending put through the business is a benefit and does go on a P11D.
What if I missed the 6 July deadline? File as soon as you can. The P11D(b) penalty is £100 per 50 employees for each month it is late and keeps building, and interest runs on any Class 1A paid after 22 July. Getting the return in stops the penalty clock.
Does a sole trader file a P11D? No. A P11D is an employer's form for benefits given to employees or directors. A sole trader has no employer, so their own expenses are claimed through Self Assessment, not reported on a P11D.
Key takeaways
- A P11D reports the cash-equivalent value of each taxable benefit in kind an employer gave a director or employee; one form per person who received benefits.
- The P11D(b) is the employer's own return, totalling the Class 1A National Insurance due on those benefits at 15% for 2025/26 and 2026/27.
- Both forms are due by 6 July after the 5 April year end, with the Class 1A paid by 22 July (19 July by cheque), filed online rather than on paper.
- A late P11D(b) costs £100 per 50 employees for each month, plus interest on late-paid Class 1A, so an accurate on-time return is the cheap option.
- From April 2027, company cars, fuel and medical benefits move to real-time payroll reporting, with most other benefits following in April 2028 and the P11D phased out.