INVOICE & BILLING TOOL

Invoice Late Fee Calculator

Estimate a possible late fee from an invoice amount, due date, payment date and fee method. Use only terms that apply to your agreement.

Invoice Late Fee Calculator

Arithmetic only. Check your agreement and current local rules; this tool does not determine whether a fee may be charged.

How this calculation works

A one-time percentage uses principal × rate. Daily and monthly estimates use simple, non-compounding prorating after any grace period.

Example

No fee is calculated when payment is on or before the due date or falls within the grace period.

When to use it

Estimate fee arithmetic only after checking your agreement and applicable local rules. The tool does not decide whether a fee may be charged.

Frequently asked questions

Does this decide if a late fee is allowed?

No. It only estimates arithmetic. Fee terms and rules depend on your agreement and jurisdiction.

Does the percentage compound?

No. Daily and monthly methods use simple, non-compounding arithmetic, prorated by days after the grace period.

Arithmetic only. Check your agreement and current local rules; this tool does not determine whether a fee may be charged.