Question 1

How do I calculate a construction bid?

EstatePass Inc. · Accepted Answer

A construction bid is built from four components: (1) Direct costs — labor, materials, equipment, and subcontractor costs; (2) Overhead — a percentage added to cover business expenses like insurance, office rent, and vehicles (typically 10-20%); (3) Profit — your desired profit margin (typically 5-15%); (4) Contingency — a buffer for unforeseen costs (typically 3-10%). Sales tax applies to materials in most states.

Question 2

What is a typical overhead rate for contractors?

EstatePass Inc. · Accepted Answer

Most general contractors operate with overhead rates of 10-20% of direct costs. Overhead includes rent, insurance, office staff, vehicles, tools, licenses, accounting, and marketing. New contractors often underestimate overhead, leading to jobs that lose money even when the work is done well. Track your actual overhead expenses annually and adjust your rate accordingly.

Question 3

What profit margin should a contractor charge?

EstatePass Inc. · Accepted Answer

A healthy net profit margin for general contractors is 8-15%. Specialty contractors (plumbing, electrical, HVAC) often achieve 10-20% margins. The profit margin in your bid must cover risk, working capital needs, and return on investment. Do not confuse profit margin with markup — a 10% margin requires an 11.1% markup on cost-plus-overhead.

Question 4

Should I include contingency in my bid?

EstatePass Inc. · Accepted Answer

Yes. A contingency of 3-10% is standard practice, especially for renovation and remodeling projects where hidden conditions are common. New construction typically uses 3-5% contingency, while renovation projects may warrant 10% or more. Contingency protects your profit from unforeseen costs.

Question 5

How is sales tax applied in construction bids?

EstatePass Inc. · Accepted Answer

In most states, including Florida, sales tax applies to materials but not to labor or professional services. The current Florida sales tax rate is 6%, plus county surtax (typically 0.5-1.5%). Always check your local rate. Some contractors include tax in their material line items; others add it as a separate line to ensure transparency.

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