Email Overload Statistics 2026
The average professional sends and receives 126 business emails per day and spends 28% of their workweek managing their inbox. Here are the numbers that explain why email is broken — and what you can do about it.
The Email Problem by the Numbers
Every stat here is sourced from published research. See sources at the bottom of this page.
Emails per day
Radicati Group, 2023
Of workweek on email
McKinsey Global Institute
Require action
The rest is noise
To refocus
After each interruption
What Email Overload Actually Costs You
28% of your workweek goes to email
According to McKinsey Global Institute, the average knowledge worker spends 28% of their workweek managing email — roughly 2.5 hours per day, or over 650 hours per year. Adobe's 2019 Email Usage Study found the figure even higher: workers spent an average of 209 minutes (3.5 hours) checking work email daily. And it's not just reading: research by Gloria Mark at UC Irvine shows that each interruption costs an average of 23 minutes and 15 seconds to regain full focus.
Most emails take hours to get a reply
According to Zendesk's CX Trends 2025 report, a "good" email response time is under four hours — and most organisations fail to hit that benchmark. Meanwhile, a Mailbird data analysis found that 35% of emails are never opened at all. Each day of delay compounds the problem: unanswered emails generate follow-ups, which create more email. Workplace surveys show that nearly half of workers struggle to complete projects on time, with buried email being a common contributor.
Decisions vanish inside threads
Email threads often contain implicit decisions — agreements, approvals, and conditions buried in replies that nobody explicitly confirms. When teams revisit old threads, they have to re-read entire conversations to find what was actually agreed. With only about 30% of emails requiring immediate action, the important decisions get lost in a sea of informational noise. Decision fatigue from constant email triage leads to slower response times and lower-quality choices by end of day.
Email volume is still growing — about 4% per year
Despite the rise of Slack, Teams, and other messaging tools, business email volume continues to grow. According to the Radicati Group, global email traffic reached 347 billion messages per day in 2024 and is projected to exceed 400 billion by 2028. Chat tools haven't replaced email — they've added another channel to manage.
2024
347B/day
Radicati Group
2025
362B/day
Radicati Group
2028
424B/day
Projected
How Threadly Fights Email Overload
Instead of another inbox to check, Threadly analyses your existing email and surfaces what actually matters.
Urgency scoring
AI analyses each thread to flag what's urgent, what's waiting, and what's resolved. The majority of emails that don't need action fade to the background.
Decision extraction
Threadly reads every thread and pulls out the decisions — who made them, when, and how confident the AI is that it's a real agreement.
Reply tracking
See exactly who you're waiting on and for how long. No more manually tracking follow-ups — Threadly flags stale threads automatically.
AI summaries
Instead of re-reading a 15-message thread, get a 2-sentence summary of what happened, what was decided, and what you need to do next.
See these features in action — no signup needed
Try the interactive demoFrequently Asked Questions
How many emails does the average person receive per day?
According to the Radicati Group's Email Statistics Report (2023-2027), the average business user sends and receives approximately 126 emails per day. This includes both internal and external messages across work accounts.
How much time do workers spend on email each day?
McKinsey Global Institute found that knowledge workers spend about 28% of their workweek managing email — roughly 2.5 hours per day. Adobe's 2019 Email Usage Study reported even higher numbers: an average of 209 minutes (about 3.5 hours) checking work email daily.
What percentage of emails actually require a response?
Workplace studies consistently find that only about 30% of emails require immediate action. The rest are informational messages, newsletters, CC'd threads, or automated notifications. A Mailbird data analysis found that 35% of emails are never even opened.
How does email overload affect focus and productivity?
Research by Gloria Mark at UC Irvine found that it takes an average of 23 minutes and 15 seconds to regain focus after an interruption. With knowledge workers being interrupted every 6-12 minutes on average, the cumulative cost of email-driven context switching is substantial.
Is email volume still growing despite Slack and Teams?
Yes. According to the Radicati Group, global email traffic reached 347 billion messages per day in 2024, growing at about 4% year-over-year, and is projected to exceed 400 billion by 2028. Chat tools have supplemented email rather than replacing it.
How Threadly Categorises Your 126 Daily Emails
Threadly automatically classifies every thread so you know what needs attention at a glance.
Needs Action
Threads requiring your response
Decisions
Agreements and approvals
Waiting
Awaiting someone's reply
FYI / Done
No action needed
Stop drowning in email
Take control of your inbox with AI-powered thread analysis. Free 14-day trial, no credit card required.
Sources
Radicati Group — Email Statistics Report, 2023-2027 & 2024-2028. Average business emails per user per day; global email traffic volumes and projections. radicati.com
McKinsey Global Institute — "The Social Economy: Unlocking Value and Productivity Through Social Technologies." Knowledge workers spend 28% of workweek on email. mckinsey.com
Adobe — 2019 Email Usage Study. Workers spend an average of 209 minutes per day checking work email. cnbc.com
Gloria Mark, UC Irvine — "The Cost of Interrupted Work: More Speed and Stress" (CHI 2008). Average of 23 minutes 15 seconds to regain focus after interruption; workers interrupted every 6-12 minutes. ics.uci.edu
Mailbird — "35% of Emails Are Left Unread: A Data-Driven Analysis of Email Use." getmailbird.com
Zendesk — CX Trends 2025. Good email first-response time benchmark: under four hours. zendesk.com