B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
8%
8% -- conversion rate lift from 0 1s speed improvement for Retail websites (mobile) (2026)
A 0.1 second improvement in mobile site speed increased conversion rates by 8% for retail sites.
- Secondary citation of a joint Deloitte and Google study without original publication date specified in text
Attribution:
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Lighthouse Research Team
Last verified:
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Source verified
Evidence graded
Value
8%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
50
Source Trust
60
Citation Chain
20
Independence
30
Methodology
45
Freshness
95
Source
Deloitte and Google
Primary
Tier C
https://redot.global/blog/inefficiency-tax-website-infrastructure-digital-roi/ ↗
Source Article
The Inefficiency Tax: How Bad Infrastructure Kills Your ROI
Table of Contents
There Is a Cost Your Business Is Already Paying
It does not appear on any invoice. It is not captured in your agency retainer or your monthly SEO report. It does not trigger an alert or surface in your analytics dashboard. But it is real, it is measurable, and for most Singapore bu…
Original Research
Deloitte and Google
· Original study ↗
Methodology
Joint Deloitte-Google study on mobile site speed impact, cited by Redot
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Retail websites (mobile): 8% conversion rate lift from 0 1s speed improvement. Source: Deloitte and Google (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/deloitte-google-mobile-speed-conversion-retail
HTML Embed
<blockquote cite="https://lighthousedata.io/data/deloitte-google-mobile-speed-conversion-retail" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>8%</strong> -- conversion rate lift from 0 1s speed improvement for Retail websites (mobile)<br><small>Source: Deloitte and Google (2026) · <a href="https://lighthousedata.io/data/deloitte-google-mobile-speed-conversion-retail" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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