B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
28%
28% -- share of workday spent on email for knowledge workers (2026)
Knowledge workers spend 28% of their workday managing email.
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Lighthouse Research Team
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Source verified
Evidence graded
Value
28%
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
McKinsey
Primary
Tier C
https://upgpt.ai/blog/your-inbox-is-broken-and-nobody-is-fixing-it-right ↗
Source Article
Your Inbox Is Broken and Nobody Is Fixing It Right
Your Inbox Is Broken and Nobody Is Fixing It Right
15 GB isn't infinite. 200+ emails per day isn't sustainable. And every 'solution' on the market wants to read all your email. We hit a breaking point — here's what we learned.
Greg Bibas
Founder & CEO·March 20, 2026·8 min read
The Day Gmail Told Me …
Original Research
McKinsey
· Original study ↗
Methodology
Cited from McKinsey research as referenced in blog post; no specific year given
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
knowledge workers: 28% share of workday spent on email. Source: McKinsey (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/knowledge-workers-email-time-share
HTML Embed
<blockquote cite="https://lighthousedata.io/data/knowledge-workers-email-time-share" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>28%</strong> -- share of workday spent on email for knowledge workers<br><small>Source: McKinsey (2026) · <a href="https://lighthousedata.io/data/knowledge-workers-email-time-share" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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