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Register now →Email Meter Research · Benchmark 2021-2026
The typical business inbox takes 18.4 hours on average to reply to an email. That is the median across more than 50,000 business mailboxes on Gmail and Microsoft 365 that Email Meter measured from 2021 to 2026, in clock hours with nights and weekends included, and automated replies excluded. A quarter of mailboxes average under 12 hours, the slowest 10% take more than 37 hours, and response times jumped 20% in 2024.
Check where your inbox stands ↓What counts as fast
Every mailbox contributes its own average response time, and the spread across mailboxes defines what is normal. Under 12 hours puts a mailbox in the fastest 25%. The typical inbox takes 18.4 hours, three quarters answer within 26.6 hours, and averaging more than 37.2 hours puts a mailbox in the slowest 10%. The mean across mailboxes is 21.4 hours, pulled up by that slow tail.
Hours, clock time · markers are percentiles of the mailbox distribution, 2021-2026
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Clock hours, nights and weekends included. That is how we measured every mailbox.
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Trend 2021-2026
The typical mailbox took about 16 hours to reply every year from 2021 to 2023. In 2024 that jumped to 19.5 hours, a 20% slowdown in a single year, and it has stayed around 19 hours since. The whole distribution moved together: the fastest quarter, the median and the slowest quarter all slowed down.
Over the same period, the share of incoming mail that never gets a reply rose from 89.5% in 2021 to 92.4% in 2026. More volume and more automated outreach may explain part of it. The data shows the change, not its cause.
Hours · line is the median mailbox, band is the middle 50% of mailboxes
By industry
Operational, deadline-driven industries reply fastest: logistics at 15.2 hours and hospitality at 16.2 hours. Most sectors sit between 17 and 20 hours. Legal (20.8 hours) and nonprofits (24.9 hours) are the slowest, and nonprofits are the only sector where the typical inbox needs more than a day.
Hours · median mailbox per industry, 2021-2026
| Industry | Median time to reply | Incoming mail unanswered |
|---|
The 24-hour rule
"Answered within 24 hours" depends on what you count. Of the messages that get a reply, the typical mailbox answers 86.6% within 24 hours. Of everything a mailbox receives, excluding automated mail, only 7.4% gets a reply within 24 hours, because most mail never gets a reply at all.
answered in under 24 hours. When an email gets a reply, it usually comes fast.
of non-automated messages answered in under 24 hours.
By industry, manufacturing sends the largest share of its replies within 24 hours (91.8%) and financial services the smallest (85.2%). These figures come from a subset of mailboxes where each reply is timed individually. Counting only the first reply to each message, the typical mailbox in that subset answers in 15.7 hours.
Tools and team setup
Gmail and Microsoft 365 mailboxes are 25 minutes apart on the median, measured separately. Shared mailboxes such as support@ or info@ reply about an hour faster than individual inboxes, which fits with several people covering the same inbox. The shared-mailbox sample is small, so read it as a direction.
| Group | Median time to reply | Middle 50% of mailboxes |
|---|---|---|
| Gmail | 18.4h | 12.0h to 26.6h |
| Microsoft 365 | 18.0h | 12.2h to 26.2h |
| Individual inbox | 18.6h | 12.2h to 26.8h |
| Shared mailbox | 17.7h | 11.0h to 25.6h |
We kept personal addresses (@gmail.com, @outlook.com) out of the headline figures. Measured separately across more than 20,000 of them, the typical personal inbox answers 0.7% of what it receives, against about 1 in 10 for business inboxes. Business email is still where conversations happen.
Other studies
Most figures quoted online come from older or smaller studies that measure something different. Here is how they compare.
| Study | Figure | What it measures |
|---|---|---|
| Email Meter, 2021-2026 | 18.4h | Median across 50,000+ business mailboxes of each mailbox's average reply time, clock hours, six years |
| Other vendor benchmarks, 2025-2026 | 4h to 13h | Usually an average per email over a few months, often in work hours, leaving out late or unanswered replies |
| SuperOffice, 2018 | 12h 10m | Average reply to test emails sent to 1,000 customer service inboxes |
| Yahoo Labs and USC, 2015 | 47 min | Median reply time in personal Yahoo Mail accounts |
FAQ
The typical business inbox takes 18.4 hours on average to reply to an email. That is the median across more than 50,000 business mailboxes measured from 2021 to 2026, in clock hours. The mean across mailboxes is 21.4 hours.
Under 12 hours puts a mailbox in the fastest 25% of business inboxes. The typical inbox takes 18.4 hours, and averaging more than 37 hours puts a mailbox in the slowest 10%.
The typical business mailbox leaves 90.7% of all incoming mail without a reply, counting newsletters, notifications and automated messages. That share rose from 89.5% in 2021 to 92.4% in 2026.
Yes. The median response time was about 16 hours from 2021 to 2023, rose to 19.5 hours in 2024, a 20% increase in one year, and has stayed around 19 hours since.
Logistics, at 15.2 hours, followed by hospitality at 16.2 hours. Nonprofits are the slowest at 24.9 hours, followed by legal at 20.8 hours.
There is no meaningful difference: 18.4 hours on Gmail and 18.0 hours on Microsoft 365.
For most teams, yes. When an email gets a reply, 86.6% of the time it arrives within 24 hours. Counting everything a mailbox receives, only 7.4% of non-automated mail gets a reply within 24 hours, because most mail is never answered.
Methodology
Aggregated, anonymized data from Email Meter users who opted in to benchmarking. No message content is used. The data covers January 2021 to July 2026.
Headline figures cover more than 50,000 business mailboxes on Gmail and Microsoft 365. Personal inboxes (@gmail.com, @outlook.com and similar) are excluded from the headline figures and reported separately. The population leans toward teams that care about email performance.
Use the data
The data and charts are free to use under a CC BY 4.0 license. Please credit Email Meter and link to this page.
Email Meter (2026). Email Response Time Benchmark 2021-2026. https://www.emailmeter.com/email-response-time-benchmark
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