Sourced from McKinsey, Statista, UC Irvine, Litmus, and HubSpot — everything you need to understand the real cost of email in one place.
Emails sent & received daily worldwide
Statista 2024
Email users globally — over half the world
Statista 2023
Of all email is spam — 160B+ messages/day
Statista
Of US adults use email, more than any social platform
Pew Research
Most-used digital communication channel for business
HubSpot
Of the average worker's week spent on email
McKinsey
Lost to email per day — 13 hours every week
McKinsey
Emails received daily by the average professional
Radicati Group
Of emails received are actually important
Basex Research
Lost annually by US companies to email interruptions
Basex Research
To fully regain focus after one email notification
UC Irvine
Times per day the average worker checks email
UC Irvine
Of productive time lost to context-switching
APA
IQ drop from constant inbox monitoring
King's College London
Of workers feel less productive due to email overload
Adobe
Of users check email every day
OptinMonster
Check email first thing every morning
OptinMonster
Unread emails in the average professional's inbox
Adobe / Mailbird
Average response time for work email
HubSpot
Prefer email as primary business communication
HubSpot
Of all email opens are on mobile — desktop is the minority
Litmus
Of Gmail users access their inbox on mobile
Google / Litmus
Delete emails that don't render well on mobile
Campaign Monitor
Check email on mobile within 1 hour of waking
Adobe
Average time reading a mobile email before acting or deleting
Litmus
Less email time when checking in batches (2–3× daily)
UC Irvine
Reduction in processing time with AI email categorization
MailWise data
Weekly email time reduction for MailWise users
MailWise case study
"Touch it once" — act, archive, or delete every email immediately
GTD / David Allen
Daily review is enough to maintain inbox zero
MailWise guide
The number that matters most
23 minutes lost per email ping.
That's not the time to read and reply — that's the time to fully regain focus afterwards. Multiply by 74 checks a day and deep work becomes structurally impossible. The fix isn't checking email less; it's removing the need to monitor it constantly.
The average professional wastes 13 hours/week on email. MailWise users cut that to 2.