Late Payment Fee
A late payment fee is an extra charge added after an invoice passes its due date. It is usually a flat amount or a monthly percentage. State it on the quote and the invoice up front.
What it means
The rate matters less than when the client first sees it. Suppose a late fee appears for the first time in a reminder, two weeks after the due date. It feels like a surprise penalty made up to pressure them. State the same fee plainly on the original quote and invoice, and it is a term they already agreed to.
A common structure is a flat percentage per month on the overdue balance. For a small service business, 1 to 2% is typical. Some add a small flat fee on top. Whatever you set, apply it to every client the same way and do not decide case by case. Check what is 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. That is small enough that few people fight it, and real enough to nudge a slow payer.
Adding a late fee to the reminder email as a threat when it should be a term. “Pay now or I’ll start charging a fee” sounds like a threat. “As noted on your invoice, a late fee now applies” sounds like a term.
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 stops most late invoices from becoming a collections problem.
- tool Late payment fee & interest calculator Enter an overdue balance, a rate, and the days late. You get the interest, the total now due, and a reminder line to copy and paste.
- tool Payment method check Enter your invoice amount, your card fee, your hourly rate, and how long a transfer takes. The tool compares card, bank transfer, and cash for this invoice. It shows the fee, your time, and when the money lands.