Which of the following is considered the most accurate way to bid a job?

• A. A detailed survey of equipment and materials needed for the job
• B. An estimate based on hourly labor
• C. A bid using last year's numbers
• D. A rough square-foot estimate

Answer: (A)

For a reliable bid, you start with a thorough takeoff that lists every material and piece of equipment you’ll need, with accurate quantities and current unit costs. This creates a complete, itemized estimate that covers materials, equipment usage, labor, subcontractors, permits, disposal, and your overhead and profit. When costs are tied directly to the actual scope of work, you can price each line item precisely and build in a realistic contingency, which helps prevent underbidding or surprises later and reduces change orders.

Relying on hourly labor estimates alone misses non-labor costs and productivity variations, so it often leads to inaccurate or unstable bids. Using last year’s numbers ignores inflation and changes in prices for materials, fuel, and equipment, and may not reflect the current scope or site conditions. A rough square-foot estimate can conceal important differences in design, materials, installation methods, and site constraints.

So a detailed survey of equipment and materials needed provides the most accurate, defendable basis for a bid.