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How does snoozing affect your productivity?

Last updated: October 15, 2026

Mostly by eating your morning time. Sleep inertia slows reaction time and thinking for roughly the first 15–30 minutes after waking whether you snooze or not, and in a lab study 30 minutes of snoozing did not hurt test scores. The real cost is time: snoozing pushes back the start of your day and trades solid sleep for dozing.

Sleep inertia and cognition

Hilditch and McHill (2019) summarize lab studies showing that reaction time and arithmetic are worse during sleep inertia; in one study, addition performance right after waking was worse than after a night without sleep (Wertz et al., 2006). Snoozing does not appear to make this worse: in a lab study of habitual snoozers, 30 minutes of snoozing improved or did not change test scores right after getting up (Sundelin et al., 2024).

The real cost: time

Snoozing for half an hour moves the start of your day half an hour later, and that time is spent dozing rather than in solid sleep: in the lab study, 30 minutes of snoozing meant about 6 minutes less sleep overall. Snooze for 30 minutes every weekday and that is two and a half hours a week of light, broken dozing instead of solid sleep or time up and about.

A faster wake-up

ByeBed's mission-based wake (math, push-ups, photo) gets you out of bed and busy on the first alarm, so the groggy minutes go into starting your day instead of dozing. See what research says about shortening sleep inertia.

Sources

1. Hilditch & McHill, Nature and Science of Sleep, 2019. Sleep inertia: current insights
2. Wertz et al., JAMA, 2006. Effects of sleep inertia on cognition
3. Sundelin et al., Journal of Sleep Research, 2024. Is snoozing losing? Why intermittent morning alarms are used and how they affect sleep, cognition, cortisol, and mood