Invoice follow-up email templates that get you paid — without burning the relationship
Six templates from friendly to firm, when to send each one, and the tone rules that make customers pay you first.
Why most follow-up emails fail
Most unpaid invoices aren’t contested — they’re buried. Your invoice arrived on a busy Tuesday, got mentally filed under “later,” and later never came. Which means the job of a follow-up email is simpler than people make it: resurface the invoice, make paying effortless, and escalate predictably if silence continues.
The two classic failures sit at opposite ends. The too-soft failure: apologetic, vague notes (“just checking in on this whenever you get a chance!”) that read as optional and train customers to deprioritize you. The too-hard failure: jumping to threats while a reasonable customer was simply behind on email — collecting the invoice and losing the account. The fix for both is the same: a calm ladder of escalating firmness on a schedule you never have to feel your way through.
The five rules before you copy anything
Every template below follows the same principles. Keep them even if you rewrite every word:
- Always restate the specifics — invoice number, amount, original due date. Never make them search.
- Always include the way to pay — a payment link if you have one, plainly stated instructions if you don’t. Friction is the enemy.
- One escalation step per message. Each email should be slightly firmer than the last — never a cliff.
- Never apologize for asking. You did the work. “Just checking in, so sorry to bother you” invites the invoice back to the bottom of the pile.
- Stop the ladder the moment they engage. A reply, a dispute or a promise to pay moves the conversation to a human track — continuing to send automated-sounding reminders after engagement is how relationships burn.
The templates
Template 1 — the pre-due nudge
Send: 2–3 days before the due date (optional, high-value invoices)
Subject: Invoice {number} — due {date}
Hi {first name},
A quick note that invoice {number} for {amount} is due on {date}. You can pay any time using the link below.
{payment link}
Thanks again for your business — glad we could help with {project}.
{your name}
{business name} Template 2 — the friendly reminder
Send: 1–3 days past due
Subject: A quick reminder — invoice {number}
Hi {first name},
Just a friendly reminder that invoice {number} for {amount} was due on {date} and is showing as unpaid. You can pay securely here:
{payment link}
If payment is already on its way, thank you — feel free to ignore this note.
{your name}
{business name} Template 3 — the second touch
Send: about 2 weeks past due
Subject: Invoice {number} is now 2 weeks past due
Hi {first name},
Following up on invoice {number} for {amount}, originally due {date} — it’s now about two weeks past due.
Could you let me know when we can expect payment? The link below works any time:
{payment link}
If anything about this invoice looks off, reply here and we’ll sort it out quickly.
{your name}
{business name} Template 4 — the statement of account
Send: 30–45 days past due
Subject: Statement of account — {business name}
Hi {first name},
Attached is a current statement of your account showing invoice {number} for {amount}, now {days} days past due.
We’d like to get this resolved this week. You can pay here:
{payment link}
If you need to discuss the balance or timing, reply to this email or call {phone} — we’re easy to reach and would rather talk than send another letter.
{your name}
{business name} Template 5 — the direct ask
Send: 45–60 days past due
Subject: Invoice {number} — payment required
Hi {first name},
Despite several reminders, invoice {number} for {amount} (due {date}) remains unpaid at {days} days past due.
Please arrange payment by {specific date}:
{payment link}
If there is a problem with this invoice we’re not aware of, this is the time to tell us — we want to resolve it directly with you.
{your name}
{business name} Template 6 — the final notice
Send: 75–90 days past due
Subject: Final notice — invoice {number}
Hi {first name},
This is a final notice regarding invoice {number} for {amount}, now {days} days past due despite repeated reminders.
If payment is not received by {specific date}, this account will be referred for further action, which we would genuinely prefer to avoid.
Pay now: {payment link}
Questions: reply here or call {phone}.
{your name}
{business name} These are generic educational examples, not legal advice — rules for payment demands vary by state and situation (and are stricter when billing consumers rather than businesses). For anything beyond routine B2B reminders, have your own counsel review your language.