ClauseryFree invoice emails for small businesses
Invoice email template: send, remind and follow up
Your invoice is ready. Now write a short message that tells the client what is attached, when payment is due and how to pay. Use the free generator or adapt one of the four email examples below.
Write your invoice email · Make the invoice, free
Free invoice email generator
Your details stay on your device. No account is needed, and nothing is saved here. This tool writes the text; you send it from your own email app.
Your email
Paste into your email app. Remove the “Subject:” line from the body, put the subject in its own field, and attach your checked invoice. For a payment acknowledgement, verify the money arrived first.
Four invoice email templates you can copy
These are original examples for an imaginary design business. Replace every name, reference, amount and date with your own records. The overdue example applies only after its stated due date has passed; the payment example acknowledges a partial payment, not full settlement.
1. Email to send an invoice
Subject: Invoice INV-0042 from River Studio — due 23 October 2026
2. Polite payment reminder email
Subject: Payment reminder: invoice INV-0042 — due 23 October 2026
3. Overdue invoice follow-up email
Subject: Follow-up on invoice INV-0042 — payment update requested
4. Email to acknowledge a payment
Subject: Payment received for invoice INV-0042
Check the invoice email before sending
The email introduces the invoice; it does not replace it. The Australian Government’s invoicing guidance says to identify what is being charged, when payment is expected and how to pay, and to retain records. Match your email to the agreed terms and the actual invoice rather than creating a new deadline in the message.
- Check the billing contact. Use the address the client gave you for invoices. Add a purchase-order or project reference where the client requires one.
- Check the unpaid balance. An invoice of USD 600.00 with USD 200.00 already received has USD 400.00 outstanding. Ask for that balance. A promised or requested deposit is not a payment received.
- Attach the finished file. Open the attachment and check its pages, invoice number, dates, currency and payment details. Read how to save an invoice as PDF if you want a reading copy; keep the editable Word file.
- Read the generated message. Confirm names, dates and amounts. If no file is attached, change any “I’ve attached” wording before sending.
- Keep a sending record. Retain the sent email and the issued invoice, and record the payment status in your own bookkeeping system. Clausery’s email generator does not keep a history or monitor replies.
When and how to follow up on an invoice
Choose the message for the situation you have verified. A reminder before or on the due date helps a client locate the invoice. An overdue follow-up asks for an update after the agreed deadline. Check your bank or payment records before chasing: a transfer may need reconciling against the invoice reference.
Start with a short, polite reminder. The Australian Government’s unpaid-invoice guidance recommends checking agreed terms and using polite follow-ups before considering formal recovery. If the client reports a missing purchase order, disputed item or wrong address, address that issue and keep a record of what you agree. Do not automatically add fees, threats or a new payment arrangement to a routine email.
For a longer unresolved balance, see what to do when a client won’t pay and the payment reminder letter template. Formal deadlines, interest and recovery steps depend on your agreement and location.
After payment: acknowledge it and make a receipt
Confirm the money arrived, then acknowledge the amount and payment date. For a partial payment, update the remaining balance separately; do not tell the client the invoice is settled. A short thank-you email is useful correspondence, but your customer may also need a receipt. Follow the payment receipt guide or make a free Word receipt from the amount actually received.
Invoice email questions
What should an invoice email say?
Identify the invoice number, what the work was, the balance due, the agreed due date and how to pay. Attach the completed invoice and invite the client to flag a question or the correct billing contact. Keep the email shorter than the invoice itself.
What is a good subject line for an invoice email?
Use a searchable invoice number and your business name, such as “Invoice INV-0042 from River Studio — due 23 October 2026”. For a reminder, keep the same reference so the client can find the original invoice.
Should I attach a Word invoice or a PDF?
Choose the format your client accepts. A PDF is convenient for reading a finished invoice; keep the editable Word file and your draft for your records. Inspect the saved attachment before sending it.
Does Clausery send the email or take the client’s payment?
No. This free tool creates plain text on your device. Copy it into your own email app, attach the invoice and send it yourself. It does not verify or collect payments.
Does a payment acknowledgement mean the invoice is paid in full?
No. The acknowledgement states the payment amount you entered, not that the entire invoice is settled. Check earlier payments and the remaining balance, and make a separate receipt for money actually received.
Sources
These practical sources are from Australia. They support the invoicing and follow-up workflow; local invoicing and recovery rules vary.
- Australian Government: how to invoice
- Australian Government: what to do when you haven’t been paid
- Australian Government: receipts and proof of purchase
Prepare the document before writing the email
Free editable Word invoice · Six-template small business document kit · What to include in an invoice
The library templates and this email generator are free. If you want to turn your own branded Word templates into repeatable questionnaires, see Clausery Pro and Team.