The easiest way to choose is to ask what is happening now. Use an estimate when cost is still uncertain, a quote when you are proposing a defined scope and price, an invoice when payment is due, a receipt after payment is confirmed, and a credit note when an earlier billed amount needs to be reduced or corrected.
Those labels can have different legal, tax, or contractual effects depending on the country and agreement. Use this page as practical workflow guidance and check local requirements when they matter.
A proforma invoice is a preliminary document with a different purpose. InvoiceCraftly does not currently provide a dedicated proforma document type.
Five-question shortcut
Choose by the stage of the transaction
Is the final cost still uncertain? Start with an estimate.
Is the scope and proposed price defined, but not yet accepted? Use a quote.
Has the work, delivery, or billable milestone happened and payment is due? Use an invoice.
Has payment already been confirmed? Use a receipt.
Does an earlier invoice need to be reduced or corrected? Use a credit note.
Quote vs invoice
Use a quote to propose; use an invoice to request payment
A quote belongs before the payment request. It sets out what you propose to supply and the expected commercial terms. An invoice belongs when there is an amount to bill under the agreed work, delivery, or milestone.
Example: a designer can quote a fixed price for a brand package before approval, then issue an invoice when the agreed billing point is reached.
Use an estimate for uncertainty; use a quote for a more defined proposal
An estimate communicates an expected cost when important inputs may still move. A quote is better when you can state the proposed scope, price, assumptions, and validity more precisely. Your agreement and local rules determine the legal effect of either document.
Example: a contractor may estimate a renovation before hidden conditions are known, then prepare a quote once scope and materials are sufficiently defined.
An invoice says what is due; a receipt says what was paid
An unpaid invoice asks the customer to pay. A receipt records payment after you have confirmed the money was received. Do not issue a receipt merely because you sent an invoice or expect a transfer.
Example: a consultant invoices €1,000 after a workshop. After confirming the client paid the €1,000, the consultant can provide a receipt that records that payment.
A credit note corrects the billed amount; a refund moves money back
A credit note documents a reduction or cancellation connected to an earlier invoice or transaction. A refund is the separate act of returning money. Depending on what has already been paid, you may need a credit note without a refund, or both a credit note and a refund.
Example: if an invoice overstated a service by €200 before payment, a €200 credit note can document the reduction. If the customer had already paid the overstated amount, returning the €200 is a separate payment action.