Late Fee Calculator

Work out what a tenant owes when rent comes in late. Enter your rent, your late fee from the lease, and how many days past the due date the payment arrived.

Monthly rent ($)

Late fee type

Late fee amount

Grace period (days)

Days past the due date

$1,500.00

Rent $1,450.00 + late fee $50.00 (8 days late, past the 5-day grace period)

How late fees usually work

Most leases name a grace period — commonly 3 to 5 days after the due date — and a fee that applies once the grace period passes. The fee is usually a flat amount (often $25–$100) or a percentage of the monthly rent (often 5–10%). A daily fee after the grace period is also common; this calculator uses a single fee, which matches most small-landlord leases.

Two things to check before you charge one: your lease (the fee and grace period have to be in it) and your state — some states cap late fees or require a minimum grace period. This calculator is a math tool, not legal advice.

Stop working this out by hand every month.

RentHearth flags overdue rent automatically and adds the late fee for you, per tenant, per your lease terms — along with the rent roll, expenses, and maintenance in one place.

See RentHearth — $19/month

Or keep it manual with the free rent-tracking spreadsheet, which has a late-fee column built in.

This calculator is general information, not legal advice. Late-fee rules differ by state and lease — check your local rules or a qualified professional before charging a fee.