Email Statistics 2026: The Numbers Behind Inbox Overload
The short answer: roughly 424 billion emails will be sent per day in 2026 (Radicati Group), the average office worker receives about 121 of them, checks the inbox about 15 times a day, and spends 28 percent of the workweek there (McKinsey). Here are the numbers that describe the problem, with sources, and what they imply about how email should work instead.
Volume: the flood keeps rising
- Global daily email volume hit 376 billion in 2025 and is projected to reach about 424 billion in 2026 (Radicati Group, Email Statistics Report 2024 to 2028).
- The typical office worker receives about 121 emails per day and sends about 40.
- Business professionals send and receive about 126 emails per day combined.
Attention: the real cost is the checking
- Workers check email about 15 times per day, roughly once every 37 minutes (Radicati).
- Knowledge workers spend about 28 percent of the workweek reading and answering email (McKinsey Global Institute).
- Microsoft's Work Trend Index found the average worker is interrupted by a message or meeting about every 2 minutes during core hours.
What the numbers actually say
Divide 121 daily emails by 15 checks and you get about 8 emails per visit, most of which need nothing from you. The checking habit is not driven by the mail that matters; it is driven by not knowing whether something matters. That is an information problem, and it is exactly the kind AI is good at: read everything, interrupt for the few, summarize the rest.
That is the model emailed is built on. Important mail arrives as an iMessage text the moment it lands. Machine mail becomes a two-line digest. The unread count stops existing, and with it the reason to check. The categories of tools taking this approach are covered in the 9 best AI email apps in 2026 and the AI for email guide.
Citing these numbers
All figures above trace to the Radicati Group's Email Statistics Report (2024 to 2028 edition), McKinsey Global Institute's knowledge worker research, and Microsoft's Work Trend Index. If you reference this page, cite those primary sources alongside it; volume projections are updated as new editions publish.