01 · SET UP OVERHEAD
Build the annual budget
Enter the recurring cost of running the company, then compare it with target revenue and annual roofing squares.
FREE ROOFING BUSINESS CALCULATOR
Stop guessing where your roofing price should start.
Use the free RoofRigor Roofing Contractor Price Floor Calculator to organize direct costs, recover annual overhead and calculate a minimum selling price that includes a target net profit margin.
- ✓Calculate annual overhead as a percentage of revenue or per roofing square.
- ✓Separate project direct costs from the cost of keeping the company operating.
- ✓Convert margin and markup correctly.
- ✓See the zero-profit floor, minimum selling price and price per square.
- ✓Print a clean project-pricing summary.
Get the calculator
Enter your business email to unlock immediate access to the Excel workbook and matching Quick-Start Guide.
A practical workflow
From annual overhead to a defensible starting price.
The workbook does not choose your market price for you. It makes the internal math visible so you know what the job must recover before you negotiate, round or issue the proposal.
02 · ENTER JOB COSTS
Price the actual scope
Add materials, direct labour, disposal, permits, rentals, other project costs and a contingency allowance.
03 · SET THE MARGIN
Calculate the floor
Choose one overhead-recovery method and calculate the minimum selling price with a target net profit margin.
A common pricing mistake
A 30% markup is not a 30% margin.
On $10,000 of cost, a 30% markup produces a $13,000 selling price and a 23.1% margin. A true 30% margin requires a selling price of approximately $14,285.71.
$1,285.71
That is the difference between those two pricing methods on only $10,000 of cost. On larger roofing projects, the misunderstanding compounds quickly.
Created for working roofers
Built around the business behind the roof.
RoofRigor provides practical startup, pricing and operating systems for roofers who understand the trade but were never handed a business manual.
Common questions
Before you download
Is the calculator a roofing price list?
No. It organizes your own cost and overhead information. It does not provide local material prices, labour rates or recommended market selling prices.
Does it work for both employees and subcontractors?
Yes. Direct production labour and subcontract installation costs can both be entered as project costs. The important part is classifying each expense consistently.
Which overhead method should I use?
The workbook includes both revenue-percentage and per-square methods. Use one method for a calculation, not both, and review the result against actual job-costing data.
What software is required?
The calculator is supplied as an Excel workbook. Confirm compatibility with your spreadsheet software before relying on formulas or formatting.
Does this replace accounting or estimating advice?
No. The workbook is educational and does not replace advice from an accountant, lawyer, tax professional, insurance broker, safety professional, estimator or local authority.
Ready to build the complete system?
The Roofing Business Starter System adds the startup guide, Roofing Profit Blueprint, full Business Toolkit and fillable forms.
RoofRigor products provide general educational and business-planning guidance. They are not legal, accounting, tax, insurance, employment, estimating or safety advice. Results depend on the accuracy and completeness of user-entered information.
RoofRigor Corp. · Roofing contractor systems by Derrick Kolly
Questions or file-access support: support@roofrigor.com