ROI Calculator for Roofers

Formula and inputs

ROI compares net gain from the investment with total investment cost. For roofers, net gain should use expected contribution after material, labor, subcontractor, warranty, and overhead effects.

Example scenario

Lead source ROI review

A roofer considers spending $8,000 on a seasonal lead campaign expected to produce $42,000 in contribution after material, labor, and sales cost.

• -Initial investment: $8,000
• -Expected monthly revenue and cost from converted jobs
• -Time period: campaign and install window

If ROI is strong only at an optimistic close rate, the contractor should rerun the model with lower conversion and higher material cost before scaling the channel.

Common mistakes

• -Counting gross contract value as gain instead of contribution.
• -Ignoring seasonality and crew bottlenecks when estimating payback.
• -Leaving warranty, rework, and sales follow-up out of the cost side.

How to interpret the output

• -If ROI is high but payback is slow, check whether cash is tied up during peak season.
• -If ROI depends on high close rate, compare historical close rate by lead source.
• -If an equipment investment improves speed, convert that time savings into realistic additional job capacity.

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