Late Payment Fee
A late payment fee is an extra charge, usually a flat amount or a monthly percentage, applied once an invoice passes its due date. State it on the quote and the invoice up front, or it reads as a threat instead of a known term.
What it means
The number that matters most isn’t the rate itself, it’s when the client first saw it. A late fee mentioned for the first time in a reminder, two weeks after the due date, feels like a surprise penalty invented to pressure them. The same fee, stated plainly on the original quote and invoice, is just a term they already agreed to.
A common structure is a flat percentage per month on the overdue balance — 1 to 2% is typical for a small service business — sometimes with a small flat fee on top. Whatever you set, keep it consistent across every client rather than deciding case by case, and check what’s enforceable where you operate before you write a specific number into your terms.
An invoice states “1.5% monthly late fee applies after the due date.” A $1,000 invoice paid 20 days late accrues roughly $16 in fees at that rate — small enough to rarely be fought over, real enough to nudge a slow payer.
Adding a late fee to the reminder email as a threat rather than a term — “pay now or I’ll start charging a fee” reads very differently from “as noted on your invoice, a late fee now applies.”
General information, not legal or tax advice — rates and rules vary by place; check yours. See our terms for the full version of this note.
See also
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- guide How to get paid faster, without the awkward follow-up The reminder cadence here heads off most of what escalates into a real collections problem.
- tool Late payment fee & interest calculator Enter an overdue balance, a rate, and days late, and get the interest, the total now due, and a copy-paste reminder line.
- tool Payment method check Type in your invoice amount, your own card fee, your hourly rate, and how long a transfer usually takes, and compare card, bank transfer, and cash for this one invoice — the fee, your own time, and when the money lands.