Late fee calculator
What is an overdue invoice actually worth? Enter the amount, your annual interest rate and how late the payment is. Free, no signup, nothing stored.
1. Interest on an overdue invoice
Simple interest on the outstanding amount. Compounding, statutory minimums and whether a late fee is enforceable depend on your contract and local law — this is a calculator, not legal advice.
2. Flat late fee
Flat late fees are common on freelancer contracts (typically 1–5% of the invoice, or a fixed $25–$50). A fee introduced for the first time on an overdue invoice is a negotiation, not a term — put it in the contract.
3. Late fee clause you can paste into a contract
Now generate the invoice itself
InvoiceForge builds the invoice, the totals and the PDF in your browser. Free, no account, and it takes about a minute.
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