The 6 July P11D Deadline: The Benefit-in-Kind Filing UK Company Directors Forget — Even With Just One Employee (Themselves)

If your UK limited company gave you, as its director, anything other than ordinary salary during the 2025 to 2026 tax year — private medical insurance, an interest-free or cheap loan, a company asset used privately, or personal bills paid by the company — there is a real chance you have a filing due on 6 July 2026. It is called the P11D, and it catches out non-resident directors more than almost any other UK form, precisely because most assume that "I don't run a payroll" or "I'm the only person in the company" means it doesn't apply. It often still does.

What a P11D Actually Is

A P11D is the form a UK company uses to report expenses and benefits in kind (commonly called "BIKs") that it provided to a director or employee but did not put through normal payroll. Alongside it, the company files a single P11D(b), which is the employer's declaration of the total Class 1A National Insurance contributions due on those benefits.

The important word is benefits. This is not about your salary, and it is not about dividends. It is about non-cash perks and personal costs the company covered on your behalf. For a small, owner-managed, or non-resident-owned company, the items that most often trigger a P11D are private medical or health insurance, a director's loan treated as a "beneficial loan" where the balance exceeded £10,000 at any point in the year, company assets made available for private use, and personal expenses settled by the company.

Why Directors of Small Companies Get Caught

Many non-resident founders set up a UK Ltd, pay themselves a modest salary or take dividends, and reasonably believe their reporting ends with the annual accounts, the corporation tax return, and the confirmation statement. But benefits in kind sit in a separate regime. If the company provided a reportable benefit, the obligation to file a P11D exists regardless of company size — a company with a single director and no other staff is not exempt.

A frequent and expensive area of confusion is the director's loan. The corporation tax charge on an overdrawn loan account (the well-known section 455 charge) is a separate issue from the benefit-in-kind point. Where the loan exceeded £10,000 at any time in the year and was interest-free or charged below HMRC's official rate, the difference is a taxable benefit that belongs on the P11D — even in a year where no section 455 charge ends up being payable.

The Dates That Matter for 2025 to 2026

For the tax year that ended on 5 April 2026, the key deadlines are fixed.

The P11D and P11D(b) must reach HMRC by 6 July 2026. They must be filed online — either through HMRC's PAYE Online service or commercial payroll software. HMRC no longer accepts these forms on paper.

Any Class 1A National Insurance owed must then be paid separately: by 19 July 2026 if you pay by post (cheque), or by 22 July 2026 if you pay electronically.

How Much Is the Class 1A Charge

Class 1A National Insurance is an employer-only charge on the total value of the reportable benefits. It is calculated at the employer's Class 1 National Insurance rate, which is 15% for this period. So if the company provided, say, £2,000 of private medical cover and a £1,000 beneficial-loan benefit, the Class 1A due would be 15% of £3,000 — £450 — payable by the company by the July deadline.

What Happens If You Miss It

The penalties are mechanical and they accrue monthly. If HMRC has not received the P11D(b) by 19 July, it can charge a penalty of £100 per month (or part month) of lateness, for every 50 (or part-batch of 50) employees who received benefits. For a one-director company that is £100 a month — small at first, but it keeps running, and if the failure continues beyond 12 months a further penalty can be applied. Late payment of the Class 1A itself can attract interest and percentage-based late-payment penalties. There are also penalties for returns that are filed but materially incorrect, so accuracy matters as much as timing.

"But Aren't P11Ds Being Abolished?"

You may have read that benefits in kind are moving into real-time payroll reporting and that the P11D is disappearing. That is true in direction but not yet in date. The government had planned to make payrolling of benefits mandatory from April 2026, but this was deferred. Mandatory payrolling now begins on a phased basis from 6 April 2027 — starting with company cars, vans, fuel and medical benefits — with most remaining benefits following in 2028, and loans and living accommodation staying voluntary for now.

The practical takeaway is simple: P11Ds have not gone away. They are still required for the 2025 to 2026 tax year (due 6 July 2026) and for 2026 to 2027 (due 6 July 2027). Anyone treating the future reform as a reason to skip this July's filing is making a costly mistake.

What to Do Before 6 July

Review what the company actually provided you during the year beyond salary and dividends: insurance, loans, assets, and any personal costs it paid. If there is nothing reportable, you generally have no P11D to file — though if HMRC has asked you to submit a return, you may still need to confirm your position. If there is something reportable, calculate the cash equivalent of each benefit, file the P11D and P11D(b) online by 6 July, and pay any Class 1A by the July deadline. When a benefit's valuation is unclear — beneficial loans and assets are the usual culprits — it is worth getting it checked rather than guessing.

Have Questions About Your Own Situation?

Every company's facts are different, and whether you have a P11D to file this July depends on exactly what your company provided you during the year. If you would like to talk it through with the MP Partner team — no pressure, no hard sell, just clear answers about your own situation — we are happy to help.

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