Guide · Business documents

Invoice vs quote vs credit note: what to send and when

Four documents cover almost every small-business transaction. They are easy to mix up, and mixing them up is how payments get delayed.

The short version

A real sequence

A client asks you to redesign their website. Here is what the paperwork looks like if nothing goes wrong:

1. You send a quote. Scope, line items, total, valid for 30 days. Nothing is owed yet — it is an offer.
2. The client approves. Now you have an agreement. Some freelancers ask for a deposit invoice at this point.
3. You do the work and send an invoice. This is the document that creates the obligation to pay. It references the quote if you want a clean trail.
4. One page turns out to be out of scope. You bill it separately, or if you already invoiced it by mistake, you issue a credit note for the difference and re-invoice correctly.

Where people get it wrong

Treating a quote as an invoice. A quote does not create a payable amount. If your quote looks exactly like an invoice — same number, same “amount due” — clients will file it and wait for the real invoice.

Issuing a credit note as a refund. A credit note says “you owe less”. A refund is money actually going back. Sending a credit note does not put cash in the client's account; if you promised a refund, you still have to pay it.

Skipping the purchase order. If you are the buyer, a PO is what authorizes the spend. Without one, the supplier's invoice arrives with nothing to match it against, and your bookkeeping turns into a scavenger hunt.

One-line rules

• Quote before, invoice after.
• Never change an issued invoice — issue a credit note and a new invoice.
• If money moves, the document says so; if only the balance changes, it is a credit note.
• Number every document, and never reuse a number.

Make one now

All four documents are free and run in your browser — no account, no upload:

Invoice Quote Credit note Purchase order

← All guides