Late Fee Calculator

Most trades charge 1.5% per month (18% APR) on past-due invoices.

Invoice balance ($)

Annual interest rate (%)

Days past due

Flat late fee ($)

Interest

$22.19

Flat fee

$0.00

New balance due

$1522.19

Are late fees legal?

Yes, in every US state — provided the fee is disclosed on your invoice or contract before the work, and the rate is not usurious. Common terms: "A late fee of 1.5% per month (18% APR) will be added to invoices not paid within 30 days."