Compare contractor quotes: scope, exclusions and total cost

How do I compare contractor quotes line by line?

Start with the same description of the finished job for each contractor. List the measured area or quantity, the material or finish, preparation, access, cleanup and disposal. Mark each item as included, excluded, optional or still to confirm. Keep allowances separate from fixed prices so an estimated material budget does not look like a guaranteed total.

Next compare dates, payment stages and how extra work is approved. The FTC recommends obtaining multiple written estimates and checking the work, materials, completion timing and price. Ask why estimates differ substantially before choosing the lowest.

How can an exclusion change the cheaper quote?

Example: Quote A says $1,840 plus disposal. Quote B says $2,010 with disposal. When A prices disposal at $230, A becomes $2,070 and B is $60 cheaper. Compare those complete totals before choosing, then check that materials, preparation and tax also match.

Keep the disposal price with the updated quote. That way the contractor and customer are working from the same total when the job is booked and invoiced.

If disposal remains unpriced, write plus disposal, price to confirm beside A. An empty amount is not a zero. Use the same approach for permits, parking, scaffolding, waste charges or moving furniture: establish whether the item is needed, who handles it and whether the stated total includes it.

What should I ask a contractor before choosing?

Ask about the differences that could change your decision. A short request tied to the actual estimate is easier to answer than a general request for more detail. Ask each contractor to put the clarification into the current written quote so the price and scope remain together.

Thanks for the quote for [job]. Before I choose, could you confirm: 1. Does your total include [preparation, material or disposal item that differs]? If not, what would it add? 2. What are the expected start and completion dates, and what could change them? 3. What is the payment schedule, and how would we agree a price for extra work? Please include those answers in the updated quote so I can compare the same scope.

What if a quantity or price changes after clarification?

Keep the original quote and the revised version, with their dates or references. Update the changed quantity and its line total, then check the overall amount again. Preserve unrelated commitments such as the agreed finish, timing and payment stages. A correction to a material quantity should not silently remove cleanup or change a deposit.

If you compare in Microsoft Excel or Google Sheets, use a separate row for each inclusion and put the quoted unit beside every rate. A square foot of wall is different from a square foot of floor; a roofing square is different from a square foot. Keep the source quote beside the sheet so a neat total does not hide a unit mismatch.

When is a higher contractor quote worth considering?

A higher quote may include more preparation, better-specified materials, disposal, easier scheduling or a clearer after-work commitment. Decide which differences matter to your job. Ask the lower bidder to price the missing scope before comparing, and ask the higher bidder to explain what the additional amount buys.

Ask what accounts for a large price gap. Keep your decision note short: the scope, accepted total, timing and reason you selected it. Then use the same written details when the work is booked and when you check the final invoice.

Frequently asked questions

Sources

• Federal Trade Commission: How to avoid a home improvement scam · Checked 2026-10-15

  Written estimates, scope, materials, timing and price; the price comparison uses our own example inputs.