Invoicing basics 2 min read

Invoice vs Estimate vs Quote: What Is the Difference?

Confused about when to use an invoice, estimate, or quote? This guide explains the differences and when to use each document in your business.

BillingOtter Team

First published

As a freelancer or small business owner, you send different documents at different stages of a job. Here is what an estimate, a quote and an invoice each mean, and when to use them.

What is an estimate?

An estimate is an approximate price for the work. It is non-binding and is used when the exact scope is not settled yet.

When to use an estimate

  • Home improvement and repair jobs
  • Custom development or design work
  • Any job where time or materials may change

To send one quickly, use the free estimate generator. Our guide on how to write an estimate that wins the job covers what to put in it.

What is a quote?

A quote gives a fixed price for a clearly defined scope of work. Unlike an estimate, a quote is usually binding once the client accepts it.

When to use a quote

  • When the scope is clearly defined
  • When you are bidding against other businesses
  • When the client needs price certainty before approving

What is an invoice?

An invoice is a request for payment, issued after the goods or services have been delivered. It is the last step in the billing process and also the record of the sale. See what is an invoice for the nine parts every invoice needs.

When to use an invoice

  • After delivering products or services
  • When a deposit or a payment is due
  • For your records and accounts

In what order do you send them?

  1. Client inquiry: send an estimate
  2. Scope agreed: send a quote
  3. Quote accepted: start the work
  4. Work completed: send an invoice

Should the invoice match the quote?

Yes. The invoice should use the same line items and prices as the accepted quote, so the client can approve it without questions. If the scope changed along the way, agree the change in writing first and show it as its own line on the invoice.

BillingOtter handles estimates, quotes and invoices in one place. Clients can e-sign estimates on Creator Pro and Team.

See plans with estimates and e-signatures
invoicing estimates quotes business documents

Send your next invoice with BillingOtter

Invoices, estimates and payment tracking in one place, in your browser.

Start free

Free plan · no credit card · cancel anytime