How interest on employee loans is taxed
In the UK, when an employer provides a loan to an employee or director, HMRC considers whether the interest charged is below commercial benchmarks. The statutory benchmark is known as the 'official rate of interest' (currently 3.75% per year).
If the total outstanding balance across all employer loans exceeds 10,000 pounds at any time during the tax year, any interest shortfall between HMRC's official rate and the interest actually paid by the employee is treated as taxable earnings.
The 10,000 pound beneficial loan exemption
Under Section 180 of the Income Tax (Earnings and Pensions) Act 2003, small workplace loans are completely exempt from Benefit in Kind rules. As long as the aggregate balance owed by the employee across all employer loans does not exceed 10,000 pounds at any point in the tax year, the loan is tax-free.
However, if the balance reaches 10,001 pounds or more even for a single day, the exemption is lost and taxable benefit is calculated on the entire balance, not just the excess over 10,000 pounds.
Calculating the interest shortfall and personal tax
The taxable Benefit in Kind is calculated as the benchmark interest (the loan principal multiplied by HMRC's official rate of 3.75%) minus the interest actually paid to the employer before 6 July following the tax year end.
The employee pays income tax on this shortfall at their marginal tax rate (20% basic, 40% higher, or 45% additional rate). The tax is typically collected by HMRC adjusting the employee's PAYE tax code for the subsequent tax year.
Worked example: 15,000 pound employee loan
Consider an employee on higher rate tax (40%) who borrows 15,000 pounds from their employer for 12 months:
1. At 0% interest: Benchmark interest at 3.75% is 562.50 pounds. The taxable BIK is 562.50 pounds. The employee pays 225.00 pounds personal tax (collected via PAYE) and the employer pays 77.63 pounds in Class 1A NIC.
2. At 2.0% interest: Employee pays 300.00 pounds interest to the employer. The shortfall is 262.50 pounds. Employee tax is 105.00 pounds, and employer NIC is 36.23 pounds.
3. At 3.75% interest: Employee pays 562.50 pounds interest to the employer. The shortfall is 0.00 pounds. No taxable benefit arises and no P11D reporting is required.
Employer reporting on form P11D Section H
Employers must report qualifying loans on form P11D Section H by 6 July following the end of the tax year. The employer must also pay Class 1A National Insurance contributions (at 13.8%) on the total cash equivalent benefit by 22 July.
Failure to report beneficial loans accurately can lead to HMRC late filing penalties and interest on unpaid Class 1A NIC.
Inputs for the employee loan interest calculator
Loan amount
The total principal amount borrowed from the employer.
Interest rate charged by company
The annual interest rate the employee pays to the employer (enter 0% if interest-free).
Borrower's income tax rate
The employee's marginal income tax bracket (20% basic, 40% higher, or 45% additional rate).
Tax year
The applicable UK tax year, setting HMRC's official interest rate.
Months loan was held in tax year
The number of full months the loan was outstanding during the tax year.
CALCULATOR QUESTIONS
Employee loan interest calculator questions
What is the official interest rate for employee loans?
HMRC's statutory official rate of interest is currently 3.75% per year (effective since 6 April 2023).
Are employee loans below 10,000 pounds taxed?
No. Under Section 180 of ITEPA 2003, if total employer loans do not exceed 10,000 pounds at any point in the tax year, there is no Benefit in Kind and no tax liability.
How does the employee pay tax on the loan benefit?
HMRC adjusts the employee's PAYE tax code for the following tax year to collect the tax in equal monthly deductions from their normal salary.
Can an employer charge commercial interest on a staff loan?
Yes. If an employer charges interest equal to or higher than HMRC's official rate (3.75%), no taxable Benefit in Kind arises and no P11D entry is needed.
Does the employer pay National Insurance on staff loans?
Yes. If a taxable benefit arises, the employer must pay Class 1A National Insurance (currently 13.8%) on the cash equivalent value of the benefit.
What happens if an employee leaves the company before repaying?
The remaining balance is typically deducted from the employee's final net salary. If the balance cannot be repaid and the employer writes it off, the write-off is treated as taxable earnings subject to PAYE tax and Class 1 NIC.