How to Read a Contractor Estimate and Spot Overcharges Before You Sign
A contractor estimate is a negotiating document, not a final price. Most homeowners sign whatever the contractor puts in front of them without realizing that vague scope, padded material costs, and one-sided payment terms are standard first-draft tactics — not fixed facts.
The best time to dispute a contractor estimate is before you sign, not after work starts. Upload your estimate and we'll flag every line item that doesn't pass the smell test.
Upload the estimate before you sign. Our AI finds problems in seconds.
35%
of home renovation projects go over the original estimate
$3,000
average cost overrun on a $20k renovation project
60%
of disputes resolved when raised before contract signing
What to look for
Materials priced above retail
Contractors typically mark up materials 10-20% — that's reasonable. If lumber, tile, or fixtures are priced 50-100% above what you can find at Home Depot or the manufacturer, push back.
Vague scope description
"Demo and remodel bathroom" with no square footage, no specified fixtures, no material grades. Vague scope is how contractors add $10,000 in "extras" that you thought were included.
Front-loaded payment schedule
Requiring 50%+ upfront before work starts gives contractors no incentive to finish. Standard is 10-15% down, then payments tied to milestones, with 10-15% held until final completion.
Unlimited change order language
Language like "additional work billed at time and materials" or "changes subject to additional charges" with no cap or approval process means you've signed a blank check.
No workmanship warranty
Any reputable contractor should warranty their labor for at least 1 year. If the estimate has no warranty language, ask for it explicitly — and if they refuse, that tells you something.
How to dispute it — step by step
Get at least three estimates
Never sign the first estimate you receive. Three estimates gives you a real market rate. If two estimates are within 15% of each other and one is 40% higher, you know where the padding is.
Break out labor vs. materials
Ask for a separate line for labor and materials on every major item. This makes comparison shopping possible and prevents hidden markups in blended line items.
Tie payments to milestones
Negotiate a payment schedule that mirrors project completion: 10% to start, 25% after framing/demo, 25% after rough-ins, 25% after drywall/finishing, 15% on final walkthrough.
Define change order process
Add explicit language: "All change orders must be approved in writing by owner before work begins. Changes will be quoted at itemized material cost plus X% labor." This protects you from unlimited add-ons.
Verify licenses and insurance
Check your state's contractor license lookup before signing anything. Unlicensed contractors are a legal and financial liability — and they're more likely to disappear mid-project.
Let the AI find it for you
Upload your document and get a plain-English breakdown of every suspicious charge in about 20 seconds. Free. No account needed.
Scan my contractor estimate — freeDownload the Contractor Estimate Review Checklist
Printable PDF — all red flags + dispute steps on one page
Frequently asked questions
What is a reasonable contractor markup on materials?
Industry standard is 10-20% markup on materials. Some contractors mark up 25-30% on specialty items. Anything above that should be questioned and compared against retail pricing.
Can I negotiate a contractor estimate?
Yes, and you should. Almost every element of an estimate is negotiable before you sign — payment schedule, material choices, scope, and labor rates. Contractors expect negotiation on first estimates.
What should a contractor estimate include?
A thorough estimate should include: itemized labor and materials, project timeline with milestones, payment schedule tied to milestones, warranty terms, change order process, cleanup and disposal responsibilities, and contractor license number.
What is a time and materials contract?
A T&M contract bills you for actual hours worked plus actual materials used. It can benefit both parties for uncertain-scope work, but should always include a "not to exceed" cap to protect you from runaway costs.
What should I do if a contractor overcharges on a signed contract?
Document everything — photos, texts, emails. Compare actual work to contracted scope. Send a formal written dispute identifying specific variances. If unresolved, file with your state contractor licensing board and pursue in small claims court for amounts under your state's limit.
ScrewedScore
Get your Screwed Score — free
Upload any bill, invoice, or contract. Our AI returns a 0-100 score with every red flag explained in plain English.
Scan mine free →No account. No upload limit. Results in ~20 seconds.