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Overdue invoice email templates: what to send on the due date, and 3, 7 and 14 days late

Updated November 4, 2026

Most late invoices aren't a client refusing to pay. They're an email that got buried, an approval stuck with someone else, or a payment run that happens on Thursdays. A short, well-timed reminder fixes most of those. Below are four emails you can copy, one for each point on a simple schedule, with subject lines and notes on tone.

The schedule: due date, then 3, 7 and 14 days late

A schedule beats sending reminders "when you remember", because it takes the emotion out of it. You don't have to decide each time whether it's too soon or too pushy; you just send the next one.

• Due dateFriendly heads-up
• 3 days latePolite follow-up
• 7 days lateFirmer, asks for a date
• 14 days lateFinal reminder, states next step

Four emails over two weeks is enough to be taken seriously without becoming noise. If you work with the same client on several projects, keep it to one email per client per day, even if more than one invoice is late.

A few rules that apply to every reminder

• Put the amount and the invoice in the subject or first line. The person reading may not be the person you worked with. They need to know what this is in two seconds.
• Include the payment link every time. Don't make them dig up the original email. One click to pay is the whole point.
• Keep it short. Three or four sentences. Long emails read as anxious or angry.
• Don't apologise for asking. "Sorry to bother you" frames payment as a favour. It isn't; it's the agreed deal.
• Reply in the same thread as the original invoice when you can, so the history is right there.
• Assume good faith until day 14. Tone gets firmer, but never sarcastic or threatening.

1. On the due date: the friendly reminder

This one isn't really a chase. It's a heads-up that lands while the invoice is still on time, which is often all it takes. Keep it light.

Other subject lines: "Invoice [#] due today", "Quick reminder: [project] invoice due today".

2. Three days late: the polite follow-up

Still warm, but now it's clearly a follow-up. Mention the original due date so there's no ambiguity, and offer to resend anything. A missing PO number or the wrong billing contact is a common, fixable reason for delay.

Other subject lines: "Following up on invoice [#]", "[Project] invoice: did this reach the right person?"

3. Seven days late: the firmer nudge

A week late, the tone shifts from "just checking" to "this needs to happen". The key move is asking for a date. A date turns a vague intention into a commitment, and it gives you something concrete to refer back to.

Tone note: it's fine to mention, calmly, that further work waits on payment if that's true. For example: "I'm holding the next batch until this one is settled." State it as a fact, not a threat.

4. Fourteen days late: the final reminder

This is the last routine email. It should be clear, short and unemotional, and it should say what happens next. Only state a consequence you will actually follow through on: pausing work, applying a late fee that's in your contract, or moving to a formal demand.

Other subject lines: "Final reminder: invoice [#] overdue", "Action needed: [project] invoice 14 days overdue".

Subject lines: what to avoid

The subject line decides whether the email gets opened today or next week. A few that tend to backfire:

• "Checking in" or "Quick question": vague, easy to put off, and the reader has no idea it's about money.
• ALL CAPS, "URGENT!!!" or red-flag words: they read as panic and can land in spam.
• Anything sarcastic, like "Did you forget about me?" It feels good to write and it damages the relationship.

The pattern that works is boring on purpose: what it is, which invoice or project, and how late. For example, "Following up: Acme video edit invoice is 3 days overdue."

Adjusting the tone for the client

The templates are a middle-of-the-road starting point. For a long-term client you like, soften day 3 and day 7 a little and add a personal line. For a new client who has already missed a deposit, it's fine to skip straight from the polite follow-up to asking for a date. Whatever you change, keep the amount, the due date and the payment link in every email.

After day 14: what to do if they still don't pay

• Change the channel. Call, or message the person you actually worked with on Slack, WhatsApp or wherever you talked during the project. Emails to a generic accounts inbox can sit for weeks.
• Ask who else to contact. "Is there someone in finance I should send this to?" is a reasonable question, not an escalation.
• Offer a split. If they say money is tight, half now and half in two weeks is better than nothing for another month.
• Send a formal demand letter stating the amount, the work, the original due date and a final deadline. Many people pay at this point.
• Small-claims court or a collections service is the last resort. Rules and limits vary by country and state, so check your local options before you threaten either.

How to avoid needing these emails at all

The most reliable fix happens before the work starts: ask for a deposit. If half the money is already in, the client is committed, your risk is halved, and the final invoice is much less likely to drift. We wrote a separate guide on how to ask a client for a 50% deposit, with wording you can copy.

Two other habits help. Put the due date and payment method in writing before you start (even a one-line email reply counts), and send the invoice the same day you deliver, while the client is happiest with the work.

Sending them automatically

The templates above work fine copied by hand. The hard part is remembering to send them on day 3, 7 and 14 while you're busy with the next project. That's what Invoice Follow-Up Co. does: it sends these four reminders on schedule, from "Your name via Invoice Follow-Up Co." with your email as reply-to, and stops as soon as you mark the invoice paid. You can see all four emails with your own details in the demo, without signing up.