Page speed is an abstract concept until you translate it into bookings. Here's a concrete example of what a slow website actually costs a service business in a real month.
The scenario: 300 monthly website visitors
A roofing business in Calgary gets 300 unique visitors per month from Google Maps, Google Search, and direct traffic. Their website loads in 6 seconds on mobile. According to Google's research, 53% of those visitors leave before the page finishes loading. That's 159 visitors who never see the website at all.
The ones who stay have a poor experience
Of the 141 who stayed, the slow load signals an unprofessional, poorly maintained business. Conversion rate on a slow site typically runs 1–2%. That's 1–3 inquiries per month from 300 visitors.
Compare to a fast site
A fast site (under 2 seconds) retains 90%+ of visitors. Conversion rate for a well-designed, fast, mobile-first roofing website runs 4–8%. On 300 visitors, that's 12–24 inquiries per month — 10–20 more per month than the slow site. At a 50% close rate and $1,500 average job, that's $7,500–$15,000 in additional revenue per month from the same traffic.
The page speed fix is a one-time investment
A fast, custom-coded website costs $900 one-time. The revenue difference described above compounds every month for years. The ROI calculation is straightforward.