GUIDE FOR DISTRIBUTORS AND WHOLESALERS
Quote vs invoice: what each one is for
A quote offers a price before the sale. An invoice asks for payment after it. A quote can be accepted or declined and nothing is owed until the customer orders; an invoice records what was delivered and what the customer now owes.
The two documents carry similar line items, so they are easy to mix up, and a distributor’s paperwork goes wrong at exactly that seam: an invoice that does not match the quote the customer accepted, a quote number used as an invoice number, a partial shipment invoiced at the full amount. This guide sets out what each document is for, where each sits in the chain from request to payment, what each should contain, a worked example of one quote becoming two invoices, the mistakes to avoid and a checklist.
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The difference in one table
| Aspect | Quote | Invoice |
|---|---|---|
| When it is sent | Before the sale | After delivery, or at the point of sale |
| What it is | An offer of items at stated prices and terms | A demand for payment for what was supplied |
| Who writes it | The seller | The seller |
| Does it create a debt? | No. Nothing is owed until the customer orders | Yes. It records a receivable for the seller and a payable for the buyer |
| Can it expire? | Yes. It carries a valid-until date | No. It has a due date instead |
| What it must match | The customer’s request | The order and what was actually delivered |
| Number sequence | Quote numbers | Invoice numbers, a separate series |
| Typical accounting role | Sales pipeline | Revenue and accounts receivable |
In many countries an invoice also has a legal and tax role that a quote does not: it is the document that supports the tax you charge and the tax your customer may reclaim. What it must contain is set by local law, so this guide stays on the commercial side and leaves the tax content to your accountant.
Where each sits in the chain
Quote and invoice are the second and the sixth step of a typical sale. Between them the customer orders, you confirm, you deliver.
| Step | Document | From | Purpose |
|---|---|---|---|
| 1 | Request for quotation | Customer | Asks for prices on specified items |
| 2 | Quote | You | Offers items at stated prices and terms for a limited time |
| 3 | Purchase order | Customer | Orders the items and accepts the offer |
| 4 | Order acknowledgement | You | Confirms what you will deliver and when |
| 5 | Delivery note or packing slip | You | Lists what was actually shipped |
| 6 | Invoice | You | Asks for payment of what was delivered |
| 7 | Statement and payment | You and customer | Records what has been paid and what is outstanding |
The invoice should be built from steps 3 and 5, the purchase order and the delivery, with prices that trace back to the accepted quote. It is not a copy of the quote.
What each document should contain
| Field | On a quote | On an invoice |
|---|---|---|
| Number | Quote number | Invoice number, plus the customer’s PO number and your quote number as references |
| Dates | Issue date and valid-until date | Invoice date, delivery date and payment due date |
| Parties | Your details, the customer, ship-to | The same, plus any tax or registration numbers required where you operate |
| Lines | Items, quantities, units and offered prices | Items, quantities and units actually delivered, with prices |
| Availability | Stock status and lead time | Not needed: the goods are delivered |
| Totals | Goods, freight, tax and total offered | Goods, freight, tax and the amount due |
| Terms | Payment terms, delivery terms, how to accept | Payment terms, due date and how to pay |
The details that make an invoice acceptable to a customer’s payables team are the PO number and matching prices. If either is wrong, the invoice is held until it is corrected, and your cash arrives later.
The in-between document: the proforma invoice
A proforma invoice looks like an invoice but is issued before delivery, as a preview of the amount due. It is used when payment must come first: prepayment from a new customer, a special order or an export where the buyer needs a document for customs or to arrange payment. It is not a demand on its own in the same way as an invoice, and a proforma should be labeled as such. Rules differ by country on whether and how a proforma can be used, so treat this as a general description.
Worked example: one quote, two invoices
A distributor sends quote Q-2210 for 100 units at $8.50, goods only. The customer orders all 100 with a purchase order. The distributor has 80 in stock and the other 20 arrive two weeks later, so it ships in two parts and invoices each part.
| Document | Quantity | Unit price | Amount | What it means |
|---|---|---|---|---|
| Quote Q-2210 | 100 | $8.50 | $850.00 | An offer; nothing is owed |
| Purchase order | 100 | $8.50 | $850.00 | The customer accepts the offer |
| Invoice 1, first shipment | 80 | $8.50 | $680.00 | Payment due for the units delivered |
| Invoice 2, second shipment | 20 | $8.50 | $170.00 | Payment due for the remainder |
Sample figures. 100 × $8.50 = $850.00; 80 × $8.50 = $680.00; 20 × $8.50 = $170.00; $680.00 + $170.00 = $850.00. Freight and tax are left out to keep the example short.
Suppose invoice 1 carries the terms “2/10 net 30”, meaning a 2% discount if paid within 10 days and the full amount due within 30. The customer who pays within 10 days pays $680.00 × 0.98 = $666.40, because the discount is 2% of $680.00, which is $13.60. A customer who pays on day 30 pays $680.00. The quote never owed anything; the invoice is where the payment terms begin to matter.
The invoice also repeats the PO number and quotes the quote number. Two simple references let the customer’s system match the document to the order and the receipt.
Common mistakes
- Invoicing prices that differ from the accepted quote without an explanation.
- Using quote numbers as invoice numbers, or one numbering series for both.
- Invoicing the full order when only part was shipped.
- Leaving the customer’s PO number off the invoice, so their payables team cannot match it.
- Sending an expired quote’s prices on an invoice after costs have moved.
- Treating a proforma invoice as a final invoice, or the reverse.
- Editing an issued invoice instead of issuing a credit note and a corrected invoice, where the rules require it.
- Sending a quote as if it were a bill, so the customer thinks they are being asked to pay before they ordered.
Checklist: before you send either document
- Is it clearly titled quote, invoice or proforma invoice?
- Does the number belong to the right series, and is it unique?
- Does a quote show a valid-until date, and an invoice a due date?
- On an invoice: does every line match the order and the delivery?
- On an invoice: are the PO number and the quote number shown?
- Are prices consistent with the accepted quote, with any difference explained?
- Are freight, tax and payment terms stated?
- Has a second person checked the amounts if they are large?
Where a quoting tool fits, and where it stops
The quote is the first place the numbers are set, and any error made there is copied into the order, the delivery and the invoice. A quote prepared from the customer’s own request, with the right items and the right prices for this customer, makes everything after it easier to match.
Qotora AI prepares quotes. It reads the customer’s request, whatever form it arrives in, finds each line in your own catalogue and applies your own price rules and customer tiers. Every price traces back to your own data. When a line is unclear, it asks a precise question instead of substituting, and a person on your team reviews and approves the quote before anything leaves. Invoices stay in the business software you already use.
Frequently asked questions
What is the difference between a quote and an invoice?
A quote offers prices before a sale and can be accepted or declined; nothing is owed until the customer orders. An invoice is issued after delivery and asks the customer to pay for what was supplied.
Can I turn a quote into an invoice?
The quote’s prices and items usually carry through to the order and then to the invoice, but the invoice should reflect what was actually ordered and delivered. If the customer orders less, or only part ships, the invoice covers that quantity, not the whole quote.
Is a quote the same as a proforma invoice?
No. A quote is an offer before the customer has ordered. A proforma invoice is a preview of the amount due for an order that is agreed, used for prepayment, customs or planning. It is sent before delivery but is not the final invoice.
Do I need a purchase order before I send an invoice?
It depends on your customer and your terms. Many business customers require a PO number on the invoice before they will pay it, so ask for it when they order.
Should quotes and invoices share a number sequence?
No. Keep separate series so that each document is unique and easy to trace. Show the quote number on the invoice as a reference.
What happens if the invoice price is different from the quote?
The customer may refuse to pay until the difference is explained, particularly if their system matches the invoice to the purchase order. Make sure prices match the accepted quote, or explain any change in writing.
Does a quote have to include tax?
It should state how tax is treated, either by showing it or by saying that it is extra or that the customer is exempt. What is required, and what rate applies, depends on your location and customer, so ask your accountant.