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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteCompare contractor estimates only after you confirm they describe the same work, materials and timing. A lower total can reflect a narrower scope or different assumptions, not a better deal. Put the bids side by side, ask contractors to explain meaningful differences, and make sure agreed details appear in a written contract before signing.
The Federal Trade Commission (FTC) advises that a written estimate identify the work, materials, completion date and price. Its guidance is U.S. federal consumer advice; licensing, permits, contract requirements, deposit limits and cancellation rights vary by location and transaction.
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Start by making the estimates comparable
A price comparison is useful only when each contractor is pricing substantially the same job. If one estimate includes preparation and replacement materials while another describes only a repair, their totals do not answer the same question. Differences may be reasonable, but you need to identify them before choosing.
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Give each contractor the same written description of the work and ask for a written estimate. The FTC’s consumer guidance says an estimate should include a description of the work, materials, completion date and price. It also recommends asking a contractor to explain a large difference between estimates rather than choosing automatically by the lowest price.
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Describe the result you want and the work you believe is needed, but do not treat your description as a substitute for a contractor’s explanation of the proposed scope. Ask each bidder to state what they will do, what they will supply, and what they are not including. If a contractor proposes a different approach, ask for the reason and have the distinction made explicit in the estimate.
Build a shared scope before comparing totals
For each estimate, check whether the work description covers the same area, quantity or task, and whether the proposed materials are identified clearly enough to distinguish them. Where the estimate specifies a material type, grade or quantity, record it as written; do not infer that two vague descriptions mean the same product. If a detail is important to the result, ask the contractor to state it in writing.
Use a simple comparison sheet with one column per contractor and these rows:
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- Work excluded or left to the homeowner or another contractor.
- Materials and specifications identified in the estimate.
- Estimated start and completion dates.
- Total stated price and any separately stated charges.
- How changed or unanticipated work will be priced and approved.
- Payment schedule and the contractor details stated in the proposed agreement.
Write down what each document actually says. Mark an unanswered question as unresolved rather than assuming the answer is included in the price.
Ask the same follow-up questions of every bidder
When an estimate is unclear, ask the contractor to clarify the same point in writing. Useful questions include: “What exactly is included in this price?” “What work or materials are excluded?” and “If the scope changes or you find unanticipated work, how will you price it, and will I approve it before it is done?”
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For cost visibility, ask: “Is this the full amount I will owe for the described work, and which permits, disposal, inspections, preparation, repair or follow-up costs are excluded?” These are prompts to reveal project-specific exclusions, not a claim that every project necessarily has each cost.
Read the scope and specifications before the price
Start with the work description, then compare materials and timing, and only then consider the total. This order helps reveal whether a lower figure is based on less work, a different material specification or a different schedule. It also prevents a neat-looking total from disguising unanswered questions.
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|---|---|---|
| Work scope | Does the estimate describe the same work and affected areas as the other bids? | Ask for the included and excluded tasks to be stated in writing. |
| Materials | Are the specified material types, grades or quantities aligned where stated? | Ask what material is proposed and whether the price changes if the specification changes. |
| Schedule | Does the estimate state an estimated start and completion date? | Ask the contractor to clarify the dates and reflect the agreed schedule in the contract. |
| Price and additional work | Is there a stated price, and does the estimate explain how extra or changed work will be handled? | Ask how the work will be priced and approved before it proceeds. |
| Terms and payment | Does the proposed written agreement identify the payment schedule and record the promises made? | Resolve missing terms and have agreed details written into the contract before signing. |
| Credentials | Are the contractor’s identity and license information provided, and is insurance evidence available? | Verify licensing with the relevant state or county authority and request proof of insurance. |
An estimate may not provide enough information to compare a particular specification. Do not fill the gap with assumptions about quality or performance. Ask for the detail that matters to your project and compare the contractors’ written answers.
Investigate a large price difference instead of guessing
A large gap between estimates is a reason to ask questions, not proof that the low bidder is cutting corners or that the high bidder is offering better work. The estimates may differ in scope, materials, labor assumptions, schedule or other line items. The documents and the contractors’ explanations are what can establish which differences apply.
- Locate the difference. Compare the work descriptions, materials, dates, total prices and any separately stated charges. Identify what is missing, different or unclear rather than asking only why one total is lower.
- Ask the contractor to explain. Request a plain explanation of the estimate’s assumptions and any difference from the shared scope. Ask the other bidder the same question where relevant.
- Request a written clarification. If the explanation changes what is included, the materials, the price or the schedule, ask for an updated estimate or written clarification.
- Compare the revised scope. Check whether the bids now describe the same work. If they still differ, list the unresolved differences and decide whether they matter to the result you want.
- Carry the agreement into the contract. Do not rely on a verbal promise to settle a material difference. The FTC recommends putting promises about scope and labor or material costs into the written agreement.
For example, if one estimate describes a material but another does not, do not conclude that the unspecified bid includes an equivalent material. Ask each contractor to identify what is proposed. If a bidder says a task is included but the estimate omits it, ask to have that inclusion recorded before comparing the totals.
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Look for exclusions and project-specific costs
The FTC’s general home-improvement guidance calls for a written work description, materials, completion date and price. It does not establish one universal checklist of fees that every trade or project must include. What may be relevant depends on the work, the site and local requirements. The reliable approach is to ask about exclusions and get the answer for your specific project.
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Ask whether the estimate includes the work and materials needed to complete the described scope, and ask how the contractor will handle changed or unanticipated work. Depending on the project, you may also want to ask about permits, disposal, inspections, preparation, related repairs or follow-up. Treat these as questions to resolve, not as charges that must appear in every estimate.
Ask who is responsible for arranging and paying for any relevant item, and whether the estimate includes it in the total or treats it separately. If an item is excluded, ask whether the contractor can price it or explain how you should account for it. Do not add an assumed amount to a bid when the contractor has not stated one.
Solar estimates need solar-specific questions
For solar installations, the FTC’s solar guidance specifically advises reviewing full installation costs, including building or electrical permit fees, equipment and workmanship warranties, expected production terms, and relevant ongoing maintenance or monthly fees. It also recommends comparing repair responsibilities and contract terms. Those are solar-specific prompts; they should not be presented as a universal list for unrelated construction work.
For a solar bid, ask where each of these items appears in the proposal or agreement, whether it is included in the stated price, and who is responsible for it. Compare production terms and repair responsibilities alongside the price; a bid total alone does not show whether those terms match.
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Check the contract before you sign
An estimate helps describe a proposed job; the written contract should record the terms you are agreeing to. The FTC says contract requirements vary by state and recommends a written contract even where one is not required. Review it against the estimate and any later written clarifications so the agreed scope, price and promises do not disappear between documents.
The FTC’s general guidance recommends checking that the contract includes the contractor’s name, address, phone number and license number, estimated start and completion dates, and written promises about scope and labor or material costs. Its disaster guidance also highlights a payment schedule and warns consumers to fill blank spaces before signing.
Before signing, verify these points
- The contractor is identified by name and contact details, with the license information stated in the contract where applicable.
- The work and materials match the scope you agreed to, and exclusions or unresolved items are visible.
- Estimated start and completion dates are stated.
- The price and payment schedule are clear.
- Agreed promises and clarifications have been written into the contract.
- There are no blank spaces left to be completed later.
- The procedure for pricing and approving changed or unanticipated work is clear to you.
If the contract and estimate conflict, ask the contractor to resolve the conflict in writing before you sign. Keep a copy of the final signed agreement and the written clarifications that form part of your understanding of the job.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Verify the contractor and protect your payments
License and insurance requirements vary by state or county. Verify licensing with the relevant state or county authority rather than treating a license number on a document as proof that it is valid for your project. Ask for proof of insurance. The FTC also recommends checking references and complaints through trusted local or consumer-protection sources.
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Do not pay the full amount up front. The FTC advises consumers not to make final payment until the work is finished and they are satisfied. Some states limit down payments, so check with your state or local consumer agency for the rule that applies where you live; there is no single deposit percentage that can be stated for every location.
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Make sure the payment schedule is written into the contract and that you understand when payments are due. If you are uncertain whether a proposed payment arrangement complies with local rules, check with the relevant consumer agency before agreeing to it.
Understand the limited three-business-day cancellation rule
The FTC describes a written three-business-day cancellation statement for certain contracts signed at a consumer’s home or away from the seller’s permanent place of business. That does not mean every contractor agreement can be cancelled within three days. Whether a cancellation right applies depends on the transaction and the law. Check the FTC guidance and the rules for your location and situation rather than relying on a general promise that the period always applies.
A practical decision sequence
Use this sequence once you have the estimates in hand:
- Normalize the scope. Confirm that each estimate describes the same work or clearly records a proposed alternative.
- Compare materials and dates. Check the stated specifications and estimated schedule rather than inferring them from price.
- Expose unknowns. Ask what is excluded, what project-relevant costs are separate, and how changed work will be priced and approved.
- Resolve material differences. Ask contractors to explain substantial estimate differences and record any clarification in writing.
- Check the agreement. Confirm contractor identity, scope, dates, price, payment schedule and written promises; fill blank spaces before signing.
- Verify locally. Check licensing, insurance, deposit rules and any cancellation rights with the relevant authorities for your location and transaction.
- Choose based on the terms you can verify. Compare the clarified scope, stated price, schedule and contract terms rather than selecting by the lowest total alone.
Warning signs that call for clarification
A single omission does not establish that a contractor is acting improperly, but it can leave you unable to compare bids or understand the commitment. Pause and get written answers if you encounter any of these conditions:
- The work or materials are described too vaguely to tell what the price covers.
- Two estimates differ substantially and the contractor has not explained why.
- A verbal promise or agreed change does not appear in the written estimate or contract.
- The agreement leaves blank spaces or omits important details such as dates or the payment schedule.
- You cannot tell how additional work will be priced or approved.
- You have not received proof of insurance or cannot verify licensing through the relevant authority.
- You are being asked to pay the full amount before work is complete.
Resolve these issues before committing. If a contractor will not clarify a material term in writing, you cannot treat that term as established when comparing the bids.
Keep the comparison grounded in what is written
The FTC’s advice is straightforward: its consumer guidance says, “A written estimate should include a description of the work to be done, materials, completion date, and the price.” Those details make comparison possible, but they do not answer every project-specific question. Where a cost, specification, responsibility or legal requirement is not stated, ask the contractor or verify it with the appropriate local authority instead of guessing.
This guidance is based on U.S. federal consumer information. Local requirements may add rules for licensing, permits, contracts, deposits or cancellation rights, and project-specific arrangements may affect which terms matter. For a particular state, project type or financing arrangement, consult authoritative guidance that applies to those circumstances.
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