About the Security Deposit Calculator
Security deposit amount (as months of rent) and the refund after deductions for damage or unpaid rent.
Also known as: rental deposit, deposit refund, damage deposit.
How to use this calculator
- Enter monthly rent, deposit (months of rent), deductions, interest owed on deposit (annual) and the other fields.
- The result updates instantly as you type — press Calculate (or Enter) at any time.
- Review the breakdown shown under the main result.
- Use Copy result or Share to save the answer or send a link with your inputs.
Formula
Refund = deposit + interest − deductions
Worked example
Using the values pre-filled in the calculator above:
- Monthly rent = 1,600
- Deposit (months of rent) = 1.5
- Deductions = 250
- Interest owed on deposit (annual) = 0 %
- Tenancy length = 1 years
the calculator returns:
- Security deposit: 2,400
- Refund due: 2,150
- Interest owed: 0