How to Email an Invoice (With Copy-Paste Templates)
By the docmonkee team · Updated July 13, 2026 · 6 min read
The email around an invoice matters almost as much as the invoice itself. A clear subject line gets it opened; a short, specific body gets it processed instead of parked; a stated due date gets it paid on time.
Below are copy-paste templates for the standard invoice email, plus the subject-line patterns that work and the mistakes that get invoices lost in inboxes.
The subject line: boring wins
The best invoice subject lines are the least creative ones. The recipient — often a bookkeeper processing dozens of emails — needs to recognize the email as an invoice, know who it's from, and file it correctly in two seconds.
- Invoice INV-000214 from Rivera Design Co.
- Invoice INV-000214 — due July 27
- Rivera Design Co. — Invoice for June services
Template: sending an invoice
Notes on why this works: the invoice number and amount are in the body (so the email is searchable later), the due date is a real date, and the "reply if something looks off" line resolves disputes before they become payment delays.
Copy & adapt
Subject: Invoice INV-000214 from [Your Business] — due [date]
Hi [Name],
Thanks again for [brief description of the work — e.g., "trusting us with the kitchen remodel"].
Your invoice [INV-000214] for [$1,450.00] is ready — you can view it at the secure link below. Payment is due by [July 27].
[Invoice link]
If anything on the invoice looks off, just reply and I'll sort it out quickly.
Best,
[Your name]
[Business name · phone]
Template: the friendly nudge before the due date
Send this two or three days before the due date. It's not a collection email — it's a courtesy that catches the "I meant to pay that" cases, which are most of them. (For invoices already past due, see our past-due email templates.)
Copy & adapt
Subject: Reminder: Invoice INV-000214 due [date]
Hi [Name],
A quick reminder that invoice [INV-000214] for [$1,450.00] is due on [July 27]. The link is below if it's easier:
[Invoice link]
If it's already scheduled, please ignore this — and thanks!
Best,
[Your name]
Attach a PDF, send a link, or both?
A PDF attachment is the traditional route and works everywhere. A secure view link has an advantage the attachment can't match: you can see when the customer has opened the invoice, which turns "did they even see it?" into a known fact.
Docmonkee sends invoices as secure links with view tracking, so the follow-up decision makes itself: not opened after a few days → resend or call; opened but unpaid → a polite nudge.
Mistakes that get invoice emails ignored
- Vague subject lines ("Quick question", "Document attached")
- No amount or due date in the email body
- Sending to the person who hired you instead of the person who pays bills — ask who should receive invoices
- Editable attachments (send PDFs or view links, not .docx)
- A long email burying the one action you want: pay by the date
Put this into practice
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Frequently asked questions
What should I write when sending an invoice?
Keep it short: a thank-you for the work, the invoice number and amount, the due date, the link or attachment, and an invitation to reply with questions. The templates above cover the standard cases.
Should I put the invoice amount in the email?
Yes. Including the amount and invoice number in the body makes the email searchable for both sides and lets the recipient process it without opening the attachment first.
Can I send invoices by email for free with docmonkee?
Yes — a free account lets you send up to 10 documents per month as secure view links, with view tracking so you know when a customer opens the invoice.