Speed gains can move revenue
Deloitte found that a 0.1-second improvement in mobile site speed increased conversions by 8% for retail and 10.1% for travel.
Deloitte Free benchmark tool
Website redesign ROI calculator + benchmark library
Estimate how much revenue a faster, clearer website could recover from slow load times, mobile friction, weak calls to action, and lost search visibility. Every default assumption below is tied to a cited source.
Calculator
Estimate recovered annual revenue
Use real numbers if you have them. The model starts conservative: it applies only the speed-related conversion change by default, then shows optional upside from form, mobile, and SEO fixes as separate levers.
Speed assumption: Deloitte reported that a 0.1-second mobile speed improvement increased conversions by 8% for retail and 10.1% for travel; this tool caps speed lift at a conservative 35% to avoid wild projections. Source: Deloitte, Milliseconds Make Millions.
Benchmark library 0.1s 53% 2.9% ~50% 94.8% Mobile 58%+ 3x
The data behind the model
Use these sourced benchmarks to explain why a redesign deserves budget — or to decide which fixes should happen first.
Slow mobile pages are abandoned
Google reported that 53% of mobile site visits are abandoned when a page takes longer than three seconds to load.
Think with GoogleA useful baseline conversion rate
Ruler Analytics' 2025 benchmark puts the average website conversion rate across its dataset at 2.9%.
Ruler AnalyticsForm friction is measurable
HubSpot reported that reducing form fields from four to three increased conversion rates by nearly 50%, which is why the calculator treats forms as a separate scenario lever.
HubSpotAccessibility remains a gap
WebAIM's Million report found detectable WCAG failures on 94.8% of home pages, which makes accessible rebuilds a practical competitive advantage.
WebAIMMobile UX still lags badly
Baymard's mobile UX research finds that ecommerce sites still struggle with product discovery, navigation, forms, and checkout flows on mobile.
Baymard InstituteMost browsing is mobile
DataReportal's global digital reports consistently show mobile phones generating the majority of web traffic worldwide.
DataReportalSearch visibility compounds
Backlinko's CTR study found the #1 organic Google result receives substantially more clicks than lower positions, making technical SEO and content quality part of redesign ROI.
Backlinko Prioritization model
What to fix first
The best redesigns do not start with mood boards. They start with revenue leaks. Score each issue by impact, confidence, and effort, then ship the highest-return fixes first.
| Leak | Evidence to collect | First fix |
|---|---|---|
| Slow pages | Core Web Vitals, mobile load time, server response | Compress media, remove blocking scripts, improve hosting |
| Weak CTAs | Click maps, scroll depth, conversion by landing page | Move primary action above the fold and make the offer concrete |
| Mobile friction | Mobile conversion rate, rage clicks, form abandonment | Simplify navigation, tap targets, forms, and checkout steps |
| SEO decay | Lost rankings, crawl waste, duplicate pages, thin service pages | Repair technical issues, consolidate cannibalizing pages, refresh intent |
| Trust gap | Low assisted conversions, high exits on pricing/about/contact | Add proof, case studies, guarantees, process clarity, and accessibility fixes |
Next step
Apply for the audit Want the model filled in with your real numbers?
Apply for a Revenue-Leak Audit and we’ll map the specific leaks in your website, SEO, funnel, and automation stack.