Customers change their minds mid-job: an extra socket here, a cheaper finish there. Without a written change price, those small changes pile into a big argument at the end. This free pricer takes the original total, adds the new lines, removes the dropped lines, and shows the revised total and the change amount. Both sides sign off on one clear number.
What this tool does
This free quote change order pricer - price a change to a quote free runs entirely in your browser. Nothing you type is sent to a server, and nothing is stored online. You open the page, enter your numbers, and the result appears at once. You can try again as often as you like, which makes it easy to test different prices before you send a quote. Short checks like this beat guessing, because a small pricing error on one quote can repeat across many jobs before anyone notices it.
How to use it
Start by gathering your real numbers, not round guesses: your actual costs, fees, and rates. Enter them in the tool in order, then press the calculate button and read every result line, not just the total. If a line looks wrong, change one input at a time and re-run the tool, so you can see exactly which input moved the result. Save or copy the final numbers into your quote while they are fresh.
Reading your result
The result lines break the answer into parts, so you can explain each part to a customer in plain words. A total alone rarely convinces anyone, but a total built from visible parts does. If the result surprises you, trust the maths first and check your inputs second: most pricing surprises come from a mistyped number, a forgotten fee, or a percent entered as a whole number instead of a rate.
Worked example
Try an original total of 5000, added lines of 800, and removed lines of 300. The revised total is 5000 + 800 - 300 = 5500. The change amount is 5500 - 5000 = 500, an increase. If the removed lines were larger than the added ones, the change would be a decrease instead, and the tool shows that direction too, so nobody misreads the sign.
Why this matters for a small business
Change orders are where small businesses lose money or lose friends. Free extras feel generous once, then become expected forever. A priced change order keeps the relationship professional: the customer chooses with the price in front of them, and you get paid for real extra work. Keep every change order numbered and dated, and never start changed work before the customer agrees the price in writing.
Pricing tips
Price a change the same day it is asked for, while the details are fresh. List each added and removed line separately instead of one lump sum, so the customer can drop a single line to save money. Keep the original quote untouched and attach the change order to it, so the paper trail stays clean from start to finish.
Common questions
Is this tool really free? Yes. It runs in your browser, needs no account, and has no sign-up step. You can use it as often as you like, for as many quotes as you like.
Is the result professional advice? No. It is an estimate to help you price a quote. Tax rules, local rates, and contract terms differ, so check anything that affects a signed agreement with a qualified adviser before you commit.
Who is it made for? Small business owners, tradespeople, freelancers, and contractors who price their own work and want clear numbers before they talk to a customer.
Spanish version: Calculadora de Cambios en Presupuestos Aceptados para Contratistas - Precio del Cambio