Invoice reminder prompt
A copy-and-paste prompt for ChatGPT, Claude or Gemini that gets a professional invoice reminder on the first try, plus the cheapest model that does it well.
What most people type
polite reminder email that invoice #1042 for $850 is 10 days overdue
It works, but the AI has to guess your recipient name, original due date and how to pay or payment link, so the first answer usually needs another round. The version below asks for exactly what a professional would deliver.
The better prompt
Write a polite reminder email that invoice #1042 for $850 is 10 days overdue. Include 2-3 subject line options, a short body that states the invoice number, amount and that it is 10 days overdue, and one clear call to action: [how to pay or payment link]. Offer to help if there is a problem or question about the invoice. Keep the tone friendly and professional, not accusatory. Use placeholders for [recipient name], [original due date], [payment details] and [my name and company]. Don't invent late fees, policies or terms.
Replace the [brackets] with your details before you send it: how to pay or payment link, recipient name, original due date, payment details, my name and company.
Why this version works
- Added subject lines and one call to action. A complete email needs a subject and a clear next step.
- Added placeholders for names, due date, payment. These details make the email usable without guessing.
- Set tone and banned invented late fees. Keeps it polite and avoids made-up terms.
What a professional invoice reminder prompt covers
- Polite short tone
- Payment link or method placeholder
- Subject line
Best AI model for this prompt
This is a light task: short, routine business email with clear facts; a small model handles it reliably. You don't need the most expensive model. The cheapest model at each company that handles it well:
| Company | Model | Per use | Per 1,000 uses |
|---|---|---|---|
| Anthropic | Claude Haiku 5.5cheapest | $0.00011 | $0.11 |
| OpenAI | GPT-6 Luna | $0.00011 | $0.11 |
| Gemini 3.1 Flash-Lite | $0.00033 | $0.33 |
Pay-per-use list prices for this prompt and its expected answer (about 200 tokens). On a monthly chat plan, the same choice shows up as more messages before you hit your limit. See today's AI prices.