Our Mission
SecurityDepositCalculator.com exists to eliminate financial ambiguity in the rental housing market. We believe that access to accurate financial compliance is a public right, not a paid privilege.
That is why this platform is 100% free. Whether you are a tenant verifying a $500 deposit or a property manager auditing a 100-unit portfolio, our mission is to translate opaque municipal codes into transparent, defensible financial statements.
Security deposit interest isn't federal—it's hyper-local. With hundreds of municipalities (like Los Angeles, San Francisco, Berkeley) changing rates annually, spreadsheets fail. They miss leap years, compounding rules, and effective dates, creating legal liability for landlords and financial loss for tenants.
We built a historical compliance engine. Input any move-in and move-out date to retrieve the exact rates effective for every specific day of tenancy. Our system automatically handles prorated interest and compounding logic according to each city's specific Rent Stabilization Ordinance (RSO).
Supported Cities
Verified against City Clerk bulletins and Rent Board declarations.
Privacy Protocol
We adhere to a strict Data Minimization Policy to ensure your financial privacy.
Anonymous
No account required to calculate.
Encrypted
Secured via HTTPS/TLS 1.3.
Private
We do not sell user data.