An invoice that prints on one page

Paste who you are, who you're billing and what you did, and get a clean invoice as one HTML file that prints to a single A4 or Letter page, with the sums done, the due date stated and your payment details where the client will find them.

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Output: Image + Text
Written with: Claude Fable 5.1
Added: Oct 1, 2026

The prompt

Make me an invoice as one HTML file I can print to PDF.

From: [YOUR NAME OR STUDIO, ADDRESS, EMAIL, VAT OR TAX NUMBER IF ANY]
To: [CLIENT NAME, COMPANY, ADDRESS]
Invoice number: [e.g. 2026-014]
Issue date: [DATE]
Payment terms: [e.g. 14 days]
Currency: [e.g. EUR]
Tax: [e.g. VAT 20%, or none, or reverse charge]
Line items, one per line:
[DESCRIPTION, QUANTITY, UNIT PRICE]
Payment details: [BANK NAME, ACCOUNT OR IBAN, REFERENCE TO USE]
Anything else: [e.g. a late fee line, a thank you, a purchase order number]

Rules:
- Everything fits on one printed page, A4 and Letter, with the print styles in the same file. No colour that disappears on a black and white printer; one accent at most.
- Sender top left, "Invoice" with the number, issue date and due date top right. "Bill to" under the sender. Line items as a table with description, quantity, unit price and amount, then subtotal, tax, and the total due in bold.
- Work out the due date from the terms and do the arithmetic. Tabular figures, right aligned, two decimals, thousands separated the way the currency does it.
- Payment details and the reference to use in a box the client can't miss, near the total.
- Plain sentences, no legal boilerplate I didn't give you. If a field I left blank matters, leave a visible [TODO] rather than guessing.

What it generates

2 examples

[01] Main example

An invoice from a small design studio on a white sheet, with the sender's address top left, the invoice number, issue date and due date top right, a bill to block, five line items with quantities and amounts in aligned columns, a subtotal, VAT and the total due in bold, and the bank details, payment reference and a 14 day payment note at the bottom

[02] Text

One HTML file: a one page invoice from a small type studio to a client, with the number, dates and terms in the corner, five line items, subtotal, VAT and the total due in bold, a payment box with the bank details and the reference to use, and print styles for A4 and Letter.

NoteThis is an example. Results change between runs and model versions. Claude Prompts is a fan project and is not affiliated with Anthropic.

Getting the most from this prompt

The invoice that gets paid

Invoices get paid late for boring reasons: the due date wasn't on it, the reference wasn't clear, the total was hard to find, or the client's accounts team couldn't tell which bank account to use. Every rule in the prompt comes from one of those. The total is bold, the due date is a date rather than "net 14", and the payment details sit in a box next to the amount.

Check the arithmetic anyway

Claude does the sums and the date and gets them right, but it's your money. Read the subtotal and the tax line once before you send it. If your tax situation is unusual (reverse charge, a mixed rate, an exempt line), write it out in full in the tax field and check that line twice.

Print it before you send it

Open the file, print to PDF, and look at the result. The page is built for A4 and Letter, but a very long description can push a row onto a second page. Shorten the description rather than shrinking the type; the client's accountant has to read it too.

How to use this prompt

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