RentLateFee.com

Pick a state, enter your rent details, and RentLateFee.com tells you the late fee a landlord can legally charge there.

The calculator covers all 50 states plus DC and attaches state-specific compliance notes with legal citations, so you can see which statute the number comes from.

RentLateFee.com is a rent late fee calculator and compliance tool for landlords, and the basic calculator is free with no signup.

Beyond the calculator, the site has multi-property management features, bulk document generation and automated rent reminders.

If you ever need a paper trail, it can produce professional PDF reports meant for documentation and legal protection.

Those extras sit behind a paid subscription, so expect to pay once you move past the simple lookup.

One caveat matters.

The results are informational and not legal advice.

Local ordinances and recent changes in the law can differ from the state rules, so check with your local housing authority before you put a fee in a lease or send a notice.