Free tool
Late fee calculator
Enter what you're owed, how late it is, and your monthly rate. See the fee that's accrued and the total now due, no account, no email wall.
1.5%/month (18% annual) is the common default. Check your state cap and your invoice terms.
Accrued late fee
$54.00
At 1.5%/month simple, a $2,400.00 invoice 45 days late has accrued $54.00.
Late fees, briefly
How much late fee can I charge on an invoice?
Most freelancers and small businesses charge 1–1.5% per month (roughly 12–18% per year). The enforceable amount depends on your written invoice terms and your state's maximum interest rate, so check both before applying a fee.
How is an invoice late fee calculated?
Take the overdue amount, multiply by your monthly rate, then by the number of months (or part-months) it's late. A $2,400 invoice at 1.5%/month that's 45 days (1.5 months) late accrues $54.00. Compounding adds each month's fee to the balance before the next month accrues.
This tool is for estimation only and isn't legal advice.
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