Overdue invoice calculator
Estimate a late charge and updated invoice balance using the terms you agreed with your customer.
Estimated updated balance
$1,000.00
Free to use · No signup · Calculations run in your browser
This calculator applies the amount, dates, grace period, and fee method you provide. It does not determine whether a fee is lawful or enforceable.
Updated balance = outstanding balance + calculated late fee
A one-time 2% fee on a 1,000 balance produces a fee of 20 and an updated balance of 1,020.
That depends on your contract and applicable law. Confirm the agreed terms and local requirements before charging a fee.
This tool can prorate a simple monthly percentage by days overdue after any grace period.
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