You did the work. You sent the invoice. And now you’re on draft three of a “just floating this to the top of your inbox!” email, trying to sound breezy about the fact that you haven’t been paid.
Here’s the part nobody says out loud: chasing money feels awful because you’re improvising policy in real time. Every reminder is a small negotiation you’re inventing from scratch — how firm is too firm, how long is too long, whether asking twice makes you difficult. Businesses with payment terms don’t have those feelings. They have a clause.
It’s a policy,
not a confrontation.
The clause that does the chasing
One line, in the contract, before any work begins:
Say this
“A late fee of [X]% applies to invoices unpaid after [N] days.”
That’s it. The magic isn’t the fee — most clients will never pay it. The magic is that “urgent” suddenly finds the time to pay, because the deadline stopped being a suggestion. And when a reminder does have to go out, it isn’t you being difficult. It’s the paperwork doing its job.
The system around the clause
The clause holds the line. These four steps make sure the line rarely gets tested.
Put the terms in writing before week one. The percentage, the grace period, the due date, how to pay. In the contract and repeated in the onboarding doc — terms announced at invoice time read as improvised; terms set at kickoff read as how your business works.
Invoice on a schedule, with the due date on it. Same day of the month, every month, due date printed on the invoice. Random invoices get random payments. Rhythm trains the client’s accounts-payable reflex.
Book the reminders the day you send the invoice. Three, scheduled in advance so future-you never has to decide anything: a friendly heads-up a few days before the due date, a note on the day, and the day-late note that references the clause. Calm, short, zero apology.
Apply the fee once, warmly. The first time an invoice runs past the grace period, the fee shows up on the next invoice with one kind sentence pointing to the agreement. You’ll almost never have to do it twice. Clients respond to the patterns you teach them — this one teaches that your due date is real.
Steal the prompt
The day-late note, so you never have to write it angry:
Act as my accounts manager.Invoice [NUMBER] for [CLIENT] was due on [DATE] and is unpaid.Our agreement includes a late fee of [X]% after [N] days.Write a 3-sentence reminder in my voice: [PASTE VOICE GUIDE].Warm, brief, matter-of-fact. Reference the agreement, restatethe amount and how to pay, no apology and no exclamation points.
The tone stays warm precisely because none of it is personal – you’re not confronting anyone, you’re quoting the paperwork.
Pairs with · Protect
The Protect Your Peace Onboarding Kit
The contract clause library, the payment scripts, and the onboarding docs that set the terms before week one.
The bottom line
You’re running a business, not a collections agency. Put the clause in the contract, the due date on the invoice, and the reminders on the calendar – then let the system be the bad cop so you never have to be.