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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