Where a director borrows money from their company, a taxable benefit-in-kind (BIK) can arise if the loan is interest-free or carries interest below HMRC’s official rate. This article explains when a director’s loan becomes reportable on P11D in the 2025–26 tax year, and how the benefit is calculated in practice.
This note focuses solely on the P11D/beneficial loan rules. Other tax charges (such as company-level charges on loans outstanding after certain deadlines) are outside the scope of this article.
What is a “director’s loan” for P11D purposes?
A director’s loan arises where the company provides funds to a director (or pays personal expenses on their behalf) and the amount is not salary, dividend, or a reimbursable business expense, and is expected to be repaid. The accounting record of this is often referred to as the director’s loan account (DLA), but the P11D rules apply to the actual loan balances outstanding during the tax year.
When does a P11D benefit arise?
A taxable benefit may arise where:
- The outstanding loan balance exceeds £10,000 at any point in the tax year; and
- The interest charged by the company is below HMRC’s official rate of interest (including nil interest).
For 2025–26, HMRC’s official rate of interest is 3.75%. If the company charges interest at or above this rate, no benefit should arise (assuming the terms are applied in practice).
Important:
The £10,000 figure is a trigger, not an allowance. If the balance exceeds £10,000 at any time in the year, the benefit is calculated on the full outstanding balance for the period the loan is in place, not just the excess over £10,000.
How is the benefit calculated?
In broad terms, the benefit is:
Outstanding loan balance × (HMRC official rate − interest actually paid)
Time-apportioned for the period the loan is outstanding in the tax year.
HMRC accepts either:
- an average balance method (commonly used where balances are relatively stable), or
- a daily balance method (more precise where balances fluctuate).
The benefit is reported on P11D, and the company pays Class 1A NIC on the value of the benefit. The director is taxed on the benefit through their personal tax return.
Worked example: loan exceeds £10,000 and increases mid-year (2025/26)
Facts (illustrative):
- 6 April 2025: Director loan balance = £8,000
- 1 July 2025: Additional drawings taken; balance increases to £12,000
- No interest charged by the company
- Balance remains at £12,000 until 5 April 2026
- HMRC official rate for 2025/26: 3.75%
Step 1 – Identify when the £10,000 threshold is breached
The balance exceeds £10,000 from 1 July 2025 onwards. No P11D benefit arises before that date (on these facts).
Step 2 – Calculate the benefit for the relevant period
Period above £10,000: 1 July 2025 to 5 April 2026 (approximately 9 months)
Annual interest at official rate on £12,000:
£12,000 × 3.75% = £450 per year
Time-apportion for 9 months:
£450 × (9/12) = £337.50 taxable benefit
Tax impact (illustrative):
- Director: taxed on £337.50 as a benefit in kind.
- Company: pays Class 1A NIC on £337.50.
If interest had been charged at, or above, 3.75% for the relevant period, the taxable benefit would be reduced or eliminated.
What if the balance changes during the year?
Where the loan balance moves up and down, the calculation should reflect the actual amounts outstanding over time. In practice, this is often done using:
- an average balance for each relevant period, or
- a daily balance approach where movements are frequent or material.
The aim is to ensure the benefit reflects the economic value of the cheap (or interest-free) borrowing over the period in question.
Practical points for directors and companies
- Monitor director loan balances during the year, not just at year end.
- Consider charging interest at no less than HMRC’s official rate where loans are expected to be outstanding.
- Keep clear records of drawings, repayments, and interest charged.
- Ensure P11D reporting is reviewed annually where loan balances have exceeded £10,000 at any point.
Caveat
The tax treatment of director loans can depend on the specific facts and timing of transactions, and HMRC practice may change. The examples above are illustrative only and do not constitute tax advice. Professional advice should be taken before implementing or relying on any particular approach.
