What to include on an invoice

Miss a key detail and your invoice gets questioned, delayed, or — if you’re tax-registered — rejected. Here’s the complete checklist.

The essential checklist

• The word “Invoice” — so it’s unmistakable.
• A unique invoice number — sequential, never reused.
• Your business name and contact details — email at minimum.
• Your tax / VAT ID — required if you’re tax-registered.
• Your client’s name and details — billed to the right contact.
• Issue date and due date — with explicit payment terms.
• Itemized list — description, quantity, unit price, line total.
• Subtotal, tax, and total due — broken down clearly.
• Payment instructions — how and where to pay you.
• Notes / terms — thank-you, late-fee policy, PO number if needed.

Tax and currency: don’t skip these

If you charge sales tax, VAT, or GST, show the rate and the tax amount as a separate line — not just baked into the total. If you bill international clients, state the currency explicitly (e.g. “USD”, “EUR”) so there’s no ambiguity about what they owe. A good generator handles both automatically.

Details that get you paid faster

• A clear due date beats “Net 30” buried in fine print.
• A payment link or exact bank details remove friction.
• A PO or reference number (when the client uses them) speeds up approval.
• A professional, branded look signals you’re organized — and organized people get paid first.

Keep a copy

Always keep a copy of every invoice for your records and taxes. Saving the PDF (and noting when it was paid) is enough for most freelancers and small businesses.

Ready to put the checklist to work? See how to write an invoice step-by-step, or just make one now.