The five inputs that drive ROI
To calculate ROI on a custom website, you need exactly five numbers:
- Monthly visitors: Pull from Google Analytics. (If you don't have it set up, that's tip #1.)
- Current conversion rate: Form submissions ÷ visitors. Most contractor templates run 0.4-0.8%.
- Custom site conversion rate: Conservative estimate 1.5-2.5% post-rebuild.
- Lead-to-close rate: Sales-team data. Industry average 18-28%.
- Average closed deal value: Your books.
The formula
Monthly revenue lift = (Visitors × (New CR − Old CR)) × Close rate × Avg deal value
Plug in real numbers. Say you have 1,200 monthly visitors, current CR is 0.6%, custom CR projected at 2.0%, close rate 22%, and average ticket $32K:
- Extra leads/month: 1,200 × (0.020 − 0.006) = 16.8 leads
- Extra closed deals: 16.8 × 0.22 = 3.7 deals
- Extra revenue: 3.7 × $32,000 = $118,400/month
A $5,400 Growth-tier build pays back inside the first three weeks. After that, every additional month is pure lift on top of the existing business.
Three scenarios across business sizes
Even halving these numbers to be conservative, the worst-case scenario is still 30-60× ROI on the build cost in year one alone.
What if your inputs are softer?
Even with weaker assumptions:
- Only 600 visitors/month (small operator)
- Conversion lift only from 0.5% to 1.2% (modest improvement)
- Close rate 15%
- Average ticket $12K
Math: 600 × 0.007 × 0.15 × 12,000 = $7,560/month in lift. The Starter package ($2,800) breaks even in week two. Smaller operations actually have higher percentage ROI because the conversion lift floor is lower to start.
The non-revenue ROI most contractors miss
Three additional value streams that don't show up on the spreadsheet but matter in year 2+:
- Lead quality. Multi-step intake forms qualify leads before sales touches them. Sales-team productivity 1.5-2× without hiring.
- Brand asset value. A custom site is a balance-sheet asset. When you sell or take on partners in 5 years, a real website (vs. a generic template) materially affects valuation.
- Hiring leverage. A killer site attracts better employees. Construction labor is tight; the firms that look digital-first hire better.
If you have 50 visitors/month and a $1,200 average ticket, a custom site doesn't have the math. Stay on a clean template, focus on driving traffic, revisit the rebuild when traffic crosses ~500 monthly visitors.
Want us to run your specific math?
Book a 30-minute call. Bring your traffic data, conversion rate, and ticket size. We'll calculate your specific breakeven on the call.
Book the Math Session