Invoice vs Quotation
A quotation and an invoice are closely related, but they serve different purposes in a business workflow. Knowing when to use each one helps you communicate pricing clearly, keep records organized, and present your business more professionally.
What is an Invoice?
An invoice is a payment request sent after goods are delivered or work is completed. It tells the client how much they owe and usually includes payment details, totals, tax, and due information.
What is a Quotation?
A quotation is a pricing document sent before work begins. It explains the expected cost of products or services so the client can review and approve the offer.
The main difference between an invoice and a quotation
The simplest way to understand the difference is this: a quotation comes first, and an invoice usually comes later. A quotation helps a client decide whether to proceed, while an invoice asks for payment after the work or delivery stage.
Although both documents may include item descriptions, prices, tax, and totals, their purpose is not the same. One is meant to propose or confirm cost, while the other is meant to request payment.
When to use a quotation
- • Before starting a project
- • When a client asks for pricing
- • When offering products or services
- • When you need approval before work begins
- • When you want to confirm estimated cost clearly
Quotations are useful because they reduce confusion early. They help both sides agree on pricing and scope before money is requested.
When to use an invoice
- • After work is completed
- • After goods are delivered
- • When payment is due
- • When final totals are confirmed
- • When you need a formal billing record
Invoices are used to request payment formally and clearly. They help clients know exactly what to pay and how to pay it.
Side-by-side comparison
Quotation
Invoice
Why businesses need both
Businesses that quote clients before charging them usually need both documents. A quotation helps set expectations and win approval, while an invoice helps complete the payment process.
Using both documents in one workflow keeps your sales and billing process more organized and more professional.
Common confusion to avoid
Sending an invoice too early
If pricing has not been approved yet, a quotation is usually the better first step.
Using a quotation as a payment request
A quotation shows expected pricing, but it is not the same as a formal invoice.
Leaving out important details
Both documents should still be clear, complete, and easy for the client to understand.
Frequently asked questions
Can a quotation become an invoice?
Yes. Many businesses send a quotation first, then convert it into an invoice after approval.
Which document comes first?
In most cases, the quotation comes first and the invoice comes later.
Do freelancers need both?
Often yes. Freelancers may use quotations to confirm pricing and invoices to request payment.
Can both documents include tax and totals?
Yes. Both can include pricing details, but their purpose is different.