How accurate is this construction cost calculator?
This calculator gives you a solid framework based on your own inputs — real hourly rates, real material costs, and your actual overhead. The accuracy depends on the accuracy of your inputs. We include contingency and overhead fields so you can build in realistic buffers.
What overhead percentage should contractors use?
Most small contractors run 10–15% overhead (office, insurance, truck, phone, etc.). If you're a larger operation with an office, admin staff, and multiple vehicles, 15–25% is more realistic. The default 10% is a conservative starting point.
What's a good profit margin for construction?
Industry standard is 10–20% net profit margin. Residential remodeling often targets 15–20%. Commercial work may run thinner at 8–12% on larger projects. Our default 15% is a solid middle ground for most contractors.
Why include contingency in an estimate?
Contingency protects you from unknowns — hidden rot, supply price increases, weather delays, scope changes. 5–10% is standard for straightforward jobs. For renovation/remodel work with unknowns, 10–15% is smarter. Skipping contingency is the #1 reason contractors eat costs.
Can I use the PDF estimate for real clients?
Absolutely. The PDF includes a professional layout with your project details, full line-item breakdown, and grand total. It's designed to look polished enough to present to homeowners or general contractors.