Calculating Interest on Tenant Debt: Landlord Guide
How to calculate and claim statutory interest on money tenants owe you. 8% interest rate, calculation examples, and court claim guidance. Get the UK steps an...
Read this first
This guide explains the problem in plain English first, then shows you the next practical step when you are ready.
Your tenant owes you money and you need to know the fastest lawful way to chase it. This guide explains the route, the paperwork, and the mistakes that can slow you down.
Can You Claim Interest on Tenant Debt?
Yes. When making a court claim for money owed, you can claim interest in two ways:
Unpaid rent
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If the arrears keep growing, move from reading to action with the documents you need for the claim.
- Set out what is owed clearly before the numbers get harder to untangle.
- Build the claim in plain English.
- Get the court paperwork ready for the next step.
- Contractual interest - If your tenancy agreement specifies an interest rate for late payments, you can claim that rate
- Statutory interest - If no contractual rate exists, you can claim the statutory rate of 8% per year
Most tenancy agreements don't specify interest rates, so landlords typically claim the statutory 8% rate.
The Statutory Interest Rate
Under the County Courts Act 1984 (section 69), you can claim interest at 8% per annum on debts. This rate applies from:
- The date the debt became due (e.g., when rent was due but not paid)
- Until the date of judgment or settlement
The 8% rate is simple interest, not compound. You calculate it on the principal debt only, not on accumulated interest.
How to Calculate Interest
The formula for calculating statutory interest is:
Interest = (Debt - 0.08 - Days) - 365
Or broken down:
- Take the debt amount
- Multiply by 0.08 (8%)
- Multiply by the number of days since the debt was due
- Divide by 365
Calculation Examples
Example 1: Simple Rent Arrears
Tenant owes £2,000 rent. Debt became due 180 days ago.
Interest = (£2,000 × 0.08 × 180) - 365 = £78.90
Example 2: Multiple Debts
Tenant owes £1,500 rent (due 120 days ago) + £800 damage (due 90 days ago).
Rent interest = (£1,500 × 0.08 × 120) - 365 = £39.45
Damage interest = (£800 × 0.08 × 90) - 365 = £15.78
Total interest = £55.23
Example 3: Older Debt
Tenant owes £3,500. Debt became due 2 years (730 days) ago.
Interest = (£3,500 × 0.08 × 730) - 365 = £560.00
As you can see, interest adds up significantly on older debts. A 2-year-old £3,500 debt attracts £560 in interest alone.
Including Interest in Your Claim
When making a court claim, you need to:
- State you're claiming interest under the County Courts Act 1984 s.69
- Show the calculation (debt amount, rate, period)
- State the daily rate for ongoing interest
- Include interest in your total claim amount
Note: Interest continues to accrue until judgment. You can claim additional interest that builds up between issuing your claim and getting judgment.
Let Us Calculate For You
Our money claim for unpaid rent Pack automatically calculates interest and includes it in your court documents.
Start Your Claim - £29.99FAQs for landlords
Can I claim more than 8% interest?
Only if your tenancy agreement specifies a higher rate. Otherwise, 8% is the maximum for court claims. Note: excessive contractual rates might be challenged as unfair terms.
Do I have to claim interest?
No, it's optional. But there's no reason not to—it's money you're legally entitled to and adds to the pressure on the debtor to pay.
Does interest affect court fees?
Court fees are based on the total claim amount including interest. Higher claims mean higher fees, but you can recover the court fee from the defendant if you win.
What to do next
Core eviction guides to keep your case moving
Keep your case connected with the core possession guides most landlords need during arrears and notice problems.
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