Read our full guide on late payment interest
Late Payment Interest Calculator
Your client is late? Calculate exactly how much interest they owe you based on standard or custom penalty rates.
Late Payment Calculator
Calculate the interest owed on overdue freelance invoices.
$
%
✨ 1.5% per month (18% APR) is the industry standard.
Interest Accrued
$14.79
Total Invoice Amount$1014.79
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Completely Free
No sign-up required to calculate interest. Use this tool as often as you need for any overdue invoices.
Industry Standards
Built using standard freelance interest rates (1.5% to 2% monthly) to keep your penalties enforceable and professional.
Copy & Paste
Instantly copy the calculation breakdown to paste directly into your reminder email to the client.