InvoiceHome / Estimate vs invoice
Estimate vs invoice vs quote
Use an estimate to give the expected price before the work. Use an invoice to ask for payment after the work. Use a quote when you offer a fixed price.
Side by side
| Estimate | Quote or bid | Invoice | |
|---|---|---|---|
| Send it | Before the work | Before the work | After the work or a stage |
| Use it to | Give an expected price | Offer a price for a defined scope | Ask for payment |
| If the price can change | Say so in the wording | Say the price is fixed, or say what changes it | Issue a corrected invoice |
| Put on it | Scope, exclusions, valid-until date | Scope, price, terms | Number, date, amount, due date |
What binds you
Check the rule of your state. For example, New Jersey asks that home improvement contracts over $500, and all changes to them, be in writing. So write what you mean: "this price can change if…" or "fixed price for the scope above".
A simple order of work
- Send an estimate with scope and exclusions.
- Get a signature, and a contract if your state asks for one.
- Write a change order for anything new.
- Send an invoice per stage or at the end.
What each paper should say
On the estimate: the scope, what is not included, the date until the price holds, the deposit, and how the price can change. On the invoice: the number, the date of the work, each line, what the customer already paid, the balance and the due date.
Do not reuse the estimate number on the invoice. Keep the estimate number in the notes, so that both papers can be matched later.
Which word to use with a customer
Use "estimate" when hidden conditions can move the price, such as old pipe behind a wall. Use "fixed price" or "quote" when you have seen all the work and will hold the number. If a customer asks for a "bid", say in one sentence which of these your paper is.
Short answers
Can I turn an estimate into an invoice?
Yes. Copy the lines into the invoice form, add changes, and give the invoice its own number and date.
Is a signed estimate a contract?
Ask a local lawyer before you rely on it.
Sources and how this page was checked
Published by 731labs, the maker of InvoiceSnap. Last checked 11/09/2026. An AI tool helped draft this page. An automated check compared the legal facts and price ranges with their sources, using two AI models. No person reviewed this page. The sources are listed below. This page is general information. It is not tax or legal advice.
- New Jersey N.J.A.C. 13:45A-16.2, home improvement practices. Checked 11/09/2026.