Late Fee & Due Date Calculator
Find out when an invoice is due, how many days it is past due, and how much late fee has accumulated based on your agreed terms.
Invoice & Terms
Calculation Results
How late fees work
A late fee is a contractual charge agreed upon between a service provider and a client when an invoice remains unpaid past its agreed payment terms.
Payment terms define the due date: for example, Net 30 means payment is due 30 calendar days from the invoice issue date. A grace period provides additional calendar days after the due date before late fees start to accrue.
Late fees are commonly calculated either as a flat fee or as a monthly percentage (often 1.5% per month, equivalent to approximately 18% annual interest). When calculated as a percentage, the accrued amount is typically pro-rated across the exact number of days late. Local regulations and commercial agreements determine applicable fee limits and terms.
Track invoices and payment dates in ClientFoyer
ClientFoyer lets freelancers publish invoices with custom payment links, monitor view timestamps, and share project deliverables directly with clients — all behind one password-free link.