Yes, send a payment reminder before the invoice is even late: one gentle nudge a few days before the due date, a firmer follow-up about a week after, and a final notice with your late fee terms if it stretches past a month. The wording should get more direct at each stage, but never accusatory. Here is exactly what to say at each step, with templates you can copy.
the average time it takes a business to respond to a new inquiry, and 23% never respond at all, the same silence that lets invoices go unpaid
Source: Harvard Business Review, Oldroyd/McElheran/Elkington, “The Short Life of Online Sales Leads” (2011)
Why This Matters More Than It Seems
Late payments are not rare. Intuit QuickBooks’ 2025 Small Business Late Payments Report found that 56% of small businesses surveyed are currently owed money from unpaid invoices, averaging $17.5K per business. Most of the time, a client has not forgotten you on purpose, the invoice is buried in an inbox or waiting on someone else’s approval. A short, well-timed reminder clears more of that backlog than most freelancers expect.
When to Send Each Reminder
You do not need seven separate emails. Three well-timed ones cover almost every situation:
- 3 to 5 days before the due date: a friendly heads-up, not a warning
- 7 to 10 days after the due date: a firmer follow-up if nothing has arrived
- 30 days after the due date: a final notice referencing your late fee terms
If a client is chronically late, you can add a same-day-as-due-date nudge too. The goal is consistency, not volume. Billing platforms that support automatic payment reminders remove the part where you have to remember to send these at all.
The First Reminder: Friendly, Before or On the Due Date
Assume good intent here. Most clients have not ignored you, they have just lost track. Keep the subject line plain and the tone warm.
Subject: Invoice #[number] is due [date]
Body: “Hi [name], just a quick heads-up that invoice #[number] for $[amount] is due on [date]. I’ve attached a copy in case it’s easier to find. Let me know if you have any questions, happy to help. Thanks!”
Why It Works
It reads as a courtesy, not a chase. Including the invoice number, amount, and a reattached copy removes every excuse to reply “which invoice?”
The Second Reminder: Firmer, One to Two Weeks Late
Once an invoice is a week or more overdue, the tone should shift from helpful to direct, while staying professional.
Subject: Following up: invoice #[number] is now overdue
Body: “Hi [name], I wanted to follow up on invoice #[number] for $[amount], which was due on [date] and is now [X] days past due. Could you let me know the status, or when I can expect payment? If it’s already been sent, just disregard this. Otherwise, please let me know if anything’s holding it up.”
What Changed From the First Email
It states the number of days overdue directly and asks for a specific status update instead of a soft “just checking in.” That small shift signals you are tracking this, without making it a confrontation.
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Start Your Free TrialThe Final Notice: When a Late Fee or Escalation Applies
By 30 days past due, it is fair to be direct about consequences, as long as they were disclosed in your original invoice terms. If you charge a late fee, this is where you mention it. We cover exactly how much to charge and how to disclose it properly in can you charge late fees on invoices.
Subject: Final notice: invoice #[number], [X] days overdue
Body: “Hi [name], invoice #[number] for $[amount] is now [X] days past due. Per the payment terms on the original invoice, a late fee of [amount or %] applies to balances unpaid after [X] days. I’d like to resolve this without that becoming necessary, please let me know by [date] how you’d like to proceed, or reach out if there’s an issue I should know about.”
Keep a Paper Trail
At this stage, email rather than call for anything that references the late fee or a deadline, so there is a written record if the invoice ends up in collections or small claims later.
What to Include in Every Reminder Email
- Invoice number and amount in the subject line, so it’s searchable later
- The original due date and, once overdue, how many days late it is
- A reattached copy of the invoice or a link to view/pay it online
- Clear payment instructions, don’t make the client hunt for how to pay you
- Your late fee terms, but only once, at the point they actually apply
When to Stop Emailing and Call Instead
If two written reminders get no response at all, a short phone call often resolves what email can’t, especially with a long-term client where you want to preserve the relationship. Save email for anything that needs a paper trail, like the late fee notice, and use a call for a quick “hey, is everything okay?” check-in beforehand. If a client goes fully unresponsive past 60 days, that’s the point to revisit your payment terms for next time and consider whether the relationship is worth continuing on net terms at all.
None of this works well if invoices themselves are hard to track. A proper invoicing tool shows you at a glance what’s overdue and by how long, instead of digging through email threads to figure out who owes what. If you’re not there yet, a free invoice generator at least gets a clean, professional invoice out the door, which is the first step to getting paid on time in the first place. And if you’re issuing a correction rather than chasing a payment, that’s a different document, see what is a credit note for when to use one instead.
How many payment reminders should I send before an invoice is considered a lost cause?
Two to three is typical: a friendly one before or on the due date, a firmer one a week or two after, and a final notice around 30 days late. Beyond that, a phone call or reconsidering the client relationship usually works better than more emails.
Is it okay to remind a client before the invoice is even due?
Yes, and it often prevents the invoice from going late at all. A brief heads-up 3 to 5 days before the due date reads as helpful, not pushy, especially when it includes the invoice number and amount so there’s nothing to look up.
Should I call instead of emailing a late-paying client?
Email first, since it creates a record and doesn’t put the client on the spot. If two written reminders get no response, a short call can surface an issue email won’t, like a lost invoice or an internal approval delay.
What should I do if a client says the invoice was never received?
Resend it immediately with a short note and treat the due date as reset from that point. Going forward, using an invoicing tool that shows delivery and view status removes the ambiguity next time.
Can I mention a late fee in the very first reminder?
You can reference the terms already on the invoice, but save the direct late fee notice for the point it actually applies, usually 30 days past due. Leading with it in a friendly first reminder can come across as adversarial before it needs to.
