A bid is a firm, fixed price offer. An estimate is an approximation that may vary based on actual conditions. Clients often confuse the two, leading to disputes.
In practice
A homeowner gets a $500 estimate for drywall repair and is surprised when the invoice is $620 due to hidden water damage.
Why it matters
Understanding the difference helps manage client expectations.
Common questions
Am I legally required to honor an estimate?+
Not typically — estimates are approximations. Bids are contractually binding.
When should I request a bid vs. an estimate?+
Request a bid when the scope is clearly defined. Use an estimate for exploratory or diagnostic work.
Need this done right?
Talk to a real contractor.
Free onsite consultation and a line-item estimate you can actually read.