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22percent

For the heaviest email users, 8.8 hours of email is about 22 percent of a 40-hour working week.

Checked against its source on October 16, 2026

What it measures: Measures how much of a standard 40-hour week the top quarter of email users spend on email, using the 8.8 hour figure from the news report.
How it is calculated: 8.8 / 40 = 0.22, so 22 percent, assuming a 40-hour week

Calculated from

Microsoft's 2023 Work Trend Index found that the heaviest email users, the top 25 percent of its Microsoft 365 users, spend 8.8 hours a week on email.

Cited on

Email takes about 22 percent of a 40-hour week for heavy users | Yap