Roofing Job Costing Calculator
Bid roofing jobs with real numbers. No more spreadsheets, no more guessing.
👷 Labor
How many people on this roofing job
Typical: 25-35%. Covers FICA, workers comp, unemployment insurance, PTO.
🔧 Materials
Total cost of parts, supplies, and materials for this roofing job.
Markup covers your time sourcing, picking up, and storing materials. Typical: 10-25%.
🏢 Overhead
Your monthly fixed costs spread across this roofing job.
Rent, insurance, marketing, phone, software, vehicle payments, tools. Anything you pay whether or not you're on a job.
🚛 Travel & Setup
Time before and after the actual roofing work. Most contractors forget this.
Applied at your average hourly pay rate. Includes all workers.
💰 Desired Profit Margin
The percentage of the final price you keep as profit.
What to Charge
$0
Total job price
Adjust the inputs on the left to see your numbers update in real time.
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How to Cost Roofing Jobs
Roofing is a volume game with thin margins if you are not careful. A crew of four burning through a full day on a reroof can eat your profit fast when you underestimate tearoff time or material waste.
This calculator accounts for crew size, labor burden, materials at cost plus your markup, dump fees, and overhead. It gives you the floor price for the job. Your profit is whatever you charge above that number.
Use it to sanity check bids before they go out. If the margin looks tight, adjust before you commit.
Typical Roofing Costs
A standard residential reroof (25 to 30 square) runs $3,500 to $6,000 in hard costs. That includes a 4 person crew for 1 to 2 days, $2,000 to $4,000 in shingles and underlayment, plus dumpster and dump fees of $300 to $500. Storm damage repairs are smaller but less predictable on time.
Target Margins for Roofing
Roofing companies target 28% to 35% net margins on reroofs and 35% to 45% on repairs. Insurance restoration work can hit 40%+ when supplements are collected properly. If you are under 25% on reroofs, check your waste factor. Most contractors underestimate material waste by 10% to 15%.
Tips for Roofing Job Costing
- Add 10% to 15% material waste factor. Cuts, damaged bundles, and valleys eat shingles fast. Ordering short costs you a half day while someone runs for more.
- Tearoff time varies wildly. A single layer ranch takes half the time of a two layer steep pitch. Price them differently.
- Dump fees and dumpster rental are real costs. $350 to $500 per job adds up to $15K+ per year if you run 30 to 40 reroofs.
- Weather delays are inevitable. Build 1 to 2 buffer days into your crew scheduling so one rain day does not cascade into missed starts on other jobs.
Frequently Asked Questions
How much should a roofer charge per square?
Most roofing contractors charge $350 to $550 per square (100 sq ft) for a standard asphalt shingle reroof, including labor, materials, and overhead. Your cost per square is typically $200 to $350 depending on crew wages and material prices. To find your price, divide total job cost by squares, then add your target margin. At 30% margin on a $300/square cost, charge $429/square.
What is a good profit margin for roofing companies?
Roofing companies target 28% to 35% net margins on reroofs and 35% to 45% on repairs. Insurance restoration work can hit 40% or more when supplements are collected. If you are under 25% on reroofs, your material waste factor or labor estimates are probably too low.
How do you calculate labor cost for a roofing job?
Multiply each crew member hourly pay by hours on site, then add labor burden (workers comp, payroll taxes, benefits) at 18% to 25%. A 4 person crew at $22/hr with 20% burden costs $105.60/hr total. On a 2 day reroof (16 hours), that is $1,690 in labor cost alone. Include setup, tearoff, and cleanup hours separately.
What is the average cost of a roof replacement?
A standard 25 to 30 square residential reroof costs $3,500 to $6,000 in hard costs before profit margin. That breaks down to $2,000 to $4,000 in materials (shingles, underlayment, flashing), $700 to $1,200/day in crew labor, and $300 to $500 in dumpster and dump fees. Total customer price with margin ranges from $5,000 to $9,000 for most homes.
How do you calculate overhead for a roofing business?
Add monthly fixed costs: vehicle payments, insurance, equipment depreciation, yard or storage rent, office costs, and marketing. Most roofing companies carry $8,000 to $25,000/month in overhead. Divide by monthly job count to get per job overhead. A company running 8 reroofs per month with $16,000 overhead needs $2,000 per job in overhead recovery.
Knowing Your Numbers Is Step One
This calculator shows you one piece. The Growth Report shows you the full picture: where you're leaking revenue, what to fix first, and how contractors like you are growing past the ceiling.