The first 30 days after an invoice goes out is the highest-yield window for recovery. A clear, friendly, well-timed reminder series in that window pays you back faster than anything that comes later. Past 30 days the math gets harder. Past 60 days it gets a lot harder.
Here are five email templates for that window: pre-due, due-day, day three, day seven, and day fourteen. Each is short, professional, and designed to actually get paid rather than to make you feel good about following up.
A note before the templates: an email is just an email. The reason these work in series is that you send all five. Sending two and giving up is what produces unpaid invoices. Sending five over the right schedule is what recovers them.
Rules for any payment request email
Every template below follows four rules. If you write your own, follow these too.
Be specific. Name the invoice number, the amount, the original date, and the days overdue. “Just checking on the invoice” is forgettable. “Invoice #4401 for $4,200, due May 15, now 7 days overdue” is not.
Make payment easy. A payment link is worth ten paragraphs of explanation. If the debtor has to find their accounting team, a check, and an envelope to settle, they won’t.
Stay in the same register. The first email is friendly. The fifth is firmer but still professional. None are angry. Anger registers as bluster, not consequence.
End with one ask. Each email has exactly one thing for the debtor to do: pay the link, reply with a date, or get on a brief call. Multiple asks dilute the response.
Template 1: Pre-due reminder (5-7 days before due date)
Send when: 5 to 7 days before the invoice due date.
Why: Most “late” invoices aren’t deliberate. The bookkeeper missed it, the AP queue is backed up, the card on file expired. A pre-due reminder catches all three before the invoice ages into “overdue.”
Subject: Invoice #4401 due [Friday, May 15] Hi [first name], Quick reminder that invoice #4401 ($4,200) is due [Friday, May 15]. You can pay it here: [payment link] If anything's blocking payment on your end, just let me know. Thanks, [Your name]
Template 2: Due-day reminder
Send when: Morning of the due date.
Why: Light touch, high response. Most debtors who pay on the due date pay because someone reminded them.
Subject: Invoice #4401 due today Hi [first name], Invoice #4401 ($4,200) is due today. Here's the payment link if it's helpful: [payment link] Let me know if you need anything from my end. Thanks, [Your name]
Template 3: Day 3 (first follow-up after due date)
Send when: 3 days after the due date.
Why: This is the first “you’re now late” email. Tone stays friendly. The job of this email is to surface any blocker (dispute, paperwork issue, AP delay) before it festers.
Subject: Invoice #4401 quick follow-up Hi [first name], Invoice #4401 ($4,200) was due [May 15] and I haven't seen it come through yet. Probably just got buried, but wanted to flag it. Payment link: [payment link] If something's holding it up on your side (dispute, missing PO, anything), happy to sort it. Just reply and let me know. Thanks, [Your name]
Template 4: Day 7 (second follow-up, slightly firmer)
Send when: 7 days after the due date.
Why: The debtor has now had a week and three reminders. Tone shifts from “probably got buried” to “this needs attention.” Not angry, but no longer assuming a misunderstanding.
Subject: Invoice #4401 is 7 days overdue Hi [first name], Invoice #4401 ($4,200) is now a week past due. Following up to make sure it's on your radar. Payment link: [payment link] If you can't pay the full amount this week, reply with what works and we can figure out a path. If there's a dispute or issue, let me know and I'll address it directly. Looking to get this resolved this week. Thanks, [Your name]
Template 5: Day 14 (final pre-30-day touch, with options)
Send when: 14 days after the due date.
Why: This is the last shot at a clean recovery before the account starts feeling stale. Open up explicit options so the debtor has a path that isn’t “ignore the email.” Pay full, pay partial now and the rest in 30 days, or formally dispute.
Subject: Invoice #4401 is 14 days overdue, need to close this out Hi [first name], Invoice #4401 ($4,200) is now 14 days overdue. I want to get this closed out this week, so a few options to make that easier: 1. Pay in full: [payment link] 2. Settle 70% now and we'll consider the balance closed: [partial payment link or "reply and I'll send a link"] 3. Pay over 60 days in two installments. Reply and I'll send the schedule. 4. If there's a legitimate dispute, let me know in writing and we'll work through it. If I haven't heard back by [date 5 business days from now], I'll need to escalate this to a structured recovery process. Hoping we don't get there. Thanks, [Your name]
When the templates stop working
Five reminders over 30 days is a lot. If the debtor still hasn’t paid after Template 5, you’re not in the “they forgot” world anymore. You’re in the “they’re avoiding you” world. The math shifts.
Two things can happen at that point.
The first is that you keep sending the reminders yourself. The fourth one already felt desperate. The eighth one feels worse. The debtor stops opening the emails. Eventually you stop sending them. The account ages into the 90+ day bucket and recovery probability drops below 30%.
The second is that you switch to a structured recovery sequence. Not your inbox. Software, sending in your business name, with multi-channel delivery (SMS to reach debtors who have stopped opening email, email for the longer-form context), with settlement and plan paths the debtor can self-serve, on a schedule you couldn’t sustain personally.
That’s what ti3 does. Five weeks of structured recovery, in your name, sent without you. Most accounts settle by week four. The 30-day Managed plan guarantee covers the case where they don’t.
What to do next
Use the templates above for the next 30 days of any new overdue invoice. They cost you nothing and they work.
If you have accounts that are already past day 14 with no response, or accounts that aged out of your inbox months ago, send us your aging report. We’ll come back within 48 hours with an estimate of which ones are likely recoverable, what the expected timeline is, and which ones probably aren’t worth the effort.
No commitment. No sales call.