Landlord Heaven

Rent Arrears Calculator

Work out how much rent is outstanding and build a clearer arrears picture before you decide what to do next.

Calculate my rent arrears
Prepare my money claim

Build the notice, service file, court pack, claim pack, or tenancy document around your facts before you pay.

  • Answer plain-English questions and get documents built around your case, not a blank template.
  • Preview the pack before payment, fix the facts, and regenerate without starting again.
  • Use a fixed-price, instant workflow for the landlord file you actually need.

Instant calculation • Clear arrears summary • Built to help landlords prepare the next move

Trusted by UK landlords

After the calculation, you can prepare a money claim pack for unpaid rent with claim particulars and arrears evidence organised around the figures.

Enter rent details

Add each rent period so you can see the arrears position more clearly.

Keep adding rent periods until the arrears total matches your own ledger.

Summary

Total rent due

£750.00

Total paid

£0.00

Outstanding arrears

£750.00

How we calculate interest

We use a simple 8% per annum rate on any outstanding balance from its due date up to today. Treat the result as a practical estimate rather than a guaranteed court figure.

Recommended next step

Turn the arrears into a clearer debt file

When the immediate goal is payment rather than possession, move from the calculation into the money claim evidence route or send a final demand first.

Create a free demand letter

Prepare the full landlord pack

Move from a rough arrears calculation to the full money claim bundle with the forms and evidence templates you need if the debt is still unpaid.

Prepare my money claim - £39.99

Free tool includes

  • - Arrears and interest totals
  • - Basic schedule PDF export
  • - No court filing pack

Paid pack includes

  • - Pre-filled claim forms
  • - PAP/Pre-action letters bundle
  • - Evidence-ready arrears schedule

How to Calculate and Evidence Rent Arrears

1. Keep Accurate Records

Keep a clear rent ledger showing every payment due and every payment received. Bank statements help, but a proper schedule is easier for a landlord, tenant, or court to follow.

2. Evidence You'll Need

  • Tenancy agreement showing the rent amount and payment frequency
  • Complete rent schedule with all due dates and payments received
  • Bank statements showing missed or partial payments
  • Messages or letters about the arrears
  • Any payment plans or agreements already discussed

3. Interest on Rent Arrears

You may be able to claim interest on arrears depending on the legal route and the wording of your tenancy agreement. If you plan to ask for interest, make that clear in your pre-action correspondence.

4. Before You Start a Claim

Send a clear demand or letter before action first, giving the tenant a final chance to pay. That helps show you acted reasonably before moving into notice or court action.

Rent Arrears Calculator FAQs For Landlords

Prepare a clear rent schedule showing all payments due and received, with a running balance. Attach your tenancy agreement, bank statements highlighting missed payments, and copies of all communications with the tenant about the arrears. The court wants to see that you've made reasonable attempts to resolve the issue before litigation.
Yes. You may be able to claim statutory interest at 8% per annum, depending on the route and facts of the case. Interest runs from each payment's due date until it is paid or judgment is entered. You should also check whether your tenancy agreement includes a contractual interest clause.
Ask the tenant for a detailed breakdown showing which payments they believe they made, then check your own records carefully. If there is a genuine dispute, you may want to try to resolve it before court. If the tenant simply refuses to pay without a valid reason, keep the paperwork clear and let the court decide.
It depends on your goal. A Section 8 notice seeks possession of the property. A money claim focuses on recovering the debt, including after the tenant has left. Many landlords end up doing both: one route to regain possession, the other to pursue the unpaid balance.
This calculator uses the standard statutory rate of 8% per annum as simple interest. While widely accepted, actual court awards may vary based on jurisdiction, the judge's discretion, and your specific tenancy agreement. If you want a fuller arrears schedule and the paperwork for the next step, move into our Money Claim Pack.

Related Resources

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