Late payments are one of the most common reasons small, profitable companies run short of cash. The work is done, the invoice is sent, and the money just doesn't arrive. Chasing feels awkward, so founders put it off. A simple, polite routine fixes most of it.
Most late invoices aren't deliberate
Usually the invoice went to the wrong person, got stuck in an approval queue, or someone forgot. Your reminders aren't accusations. They're helping the client's process work. Keeping that in mind makes the emails much easier to write.
A follow-up schedule that works
| When | What to do |
|---|---|
| 3 days before due | Friendly heads-up that it's due soon (optional, but very effective) |
| 1–3 days after due | First reminder: polite, assumes it slipped |
| 7–10 days after | Second reminder: firmer, asks for a payment date |
| 14–21 days after | Call or message the person directly; copy whoever approves payments |
| 30+ days after | Final notice: say what happens next (late fees, pausing work) |
The free invoice follow-up tracker shows which invoices are due for which step, and writes the reminder for you.
Email templates
First reminder (just after the due date)
Subject: Invoice [number] – due [date]
Hi [name],
Just a quick note that invoice [number] for [amount] was due on [date].
I've attached it again in case it got lost.
Could you let me know when it's scheduled for payment?
Thanks,
[Your name]Second reminder (about a week late)
Subject: Invoice [number] – now [X] days overdue
Hi [name],
Following up on invoice [number] for [amount], which was due on [date]
and is now [X] days overdue.
Is there anything holding it up on your side, like a missing PO number
or a different contact for accounts payable? If so, I'm happy to send
whatever's needed.
Could you confirm a payment date by [day]?
Thanks,
[Your name]Final notice (30+ days late)
Subject: Final notice: invoice [number], [amount]
Hi [name],
Invoice [number] for [amount] is now [X] days overdue, and I haven't
been able to get a payment date.
Unless it's paid by [date], I'll need to [pause work on the project /
apply the late fee in our agreement / pass this to collections].
I'd much rather sort this out directly, so please reply or call me on
[number] if there's a problem.
[Your name]When to pick up the phone
If two emails get no reply, call. A two-minute call often uncovers the real issue: a missing purchase order number, a new finance contact, or a cash problem on their side that you'd want to know about anyway.
Prevent late payments in the first place
- Agree terms before starting work. Payment due date, late fees and what happens if it's late, in writing.
- Shorten terms. Net 14 gets paid faster than Net 30, and many clients accept it if you ask.
- Invoice immediately, not at the end of the month.
- Ask who pays invoices, and send them directly to that person or address.
- Take deposits for project work: 30–50% upfront is common for agencies and freelancers.
- Offer card or bank payment links on the invoice. The easier it is to pay, the faster it happens.
Why it matters for runway
Every overdue invoice is money you've already earned that isn't in the bank yet. Collecting it is the cheapest runway extension there is: no cuts, no fundraising, just follow-up. Add "chase overdue invoices" to your weekly review and it stops being a crisis.