The Best Time to Send Emails – Studies and Recommendations
When it comes to email marketing, timing is everything. It’s not just about crafting the perfect message; it’s about ensuring your audience sees it when they’re most receptive. Research from multiple studies consistently shows that emails sent Tuesday through Thursday between 9 AM and 12 PM achieve the highest engagement rates. However, the optimal send time depends on your industry, audience type, and campaign goals.
In this comprehensive guide, we’ll explore what the latest research reveals about email timing and provide actionable recommendations you can implement immediately.
Key Findings: What Studies Tell Us
The Universal Sweet Spot
After analyzing millions of emails and surveying email marketing professionals, researchers have identified a consistent pattern: 9 AM to 12 PM on weekdays generates the highest open and click-through rates across most industries.
Here’s the breakdown:
- Best Days: Tuesday, Wednesday, and Thursday consistently outperform other weekdays
- Best Time Windows: 9 AM–11 AM, 1 PM–2 PM, and 4 PM–6 PM
- 23% of all email opens occur within the first hour of delivery
Why These Times Work
The science behind email timing reveals several important factors:
Circadian Rhythms and Cognitive Function
Your recipient’s brain operates differently throughout the day. During early morning hours (8-11 AM), cortisol levels peak, enhancing alertness and analytical thinking. This is why emails requiring careful consideration or detailed information perform best during these morning hours. Your prospects are fresh, focused, and mentally prepared to process information.
Professional Behavior Patterns
Most professionals follow predictable email-checking patterns:
- Morning (8-10 AM): The primary inbox review happens during the first hour at work, offering the highest engagement rates
- Lunch Break (12-1 PM): A secondary engagement window with less inbox clutter
- End of Day (4-6 PM): The final email check before leaving work, where response rates are lower but emails often get morning attention the next day
The Monday-Friday Advantage
Weekdays account for over 85% of total weekly open volume and nearly 95% of weekly click volume. Why? Because emails sent during working hours—typically 10 AM to 3 PM—are more likely to be seen and engaged with, as recipients have structured schedules and dedicate time to checking emails.
B2B vs. B2C: Different Audiences, Different Strategies
B2B Email Timing
For B2B campaigns, professionals recommend:
- Best Days: Tuesday–Thursday
- Best Time: 10 AM–12 PM (with some studies suggesting 10 AM–4 PM for click-through rates)
- Why: B2B decision-makers are most engaged during peak productivity windows when they’re planning and evaluating opportunities
47.9% of B2B marketers surveyed reported the most engagement between 9 AM and 12 PM.
B2C Email Timing
B2C audiences show different preferences:
- Weekday Peak Times: 9 AM–11 AM
- Weekend Option: Sunday morning around 8 PM can boost engagement, particularly for promotional offers
- Alternative: Friday evenings also show strong engagement for B2C audiences
Importantly, 30.9% of B2C marketers reported the most engagement between 9 AM and 12 PM, though B2C timing tends to be more varied and industry-dependent than B2B.
Industry-Specific Insights
Different industries show distinct patterns in email engagement. Here’s what the data reveals:
Food and Beverage
- Highest open rates: Tuesday (13.67%)
- Highest click rates: Friday (2.33%)
- Highest order rates: Thursday (0.61%)
Home and Garden
- Highest open rates: Tuesday (11.65%)
- Best click rates: Wednesday and Thursday (2.08%)
- Best order rates: Tuesday (0.16%)
General E-commerce and Retail
For general e-commerce, Wednesday and Thursday tend to perform well, with Wednesday showing the highest click-through rates across industries.
Global Considerations: Time Zone Strategy
For businesses with global audiences, time zone optimization is critical. Rather than sending all emails at once, successful global campaigns employ staggered sending schedules.
Recommended Approach by Region
- North America: 9 AM EST
- Europe (EMEA): The optimal window is broader than previously thought—anywhere between 8 AM and 7 PM local time, with peaks at traditional business hours
- Asia-Pacific: Business communication often extends into evening hours, with 9 AM local time the following day often being effective
Advanced Strategy: Send Time Optimization
Modern email platforms offer Send Time Optimization (STO) features that use artificial intelligence to determine the best send time for each individual subscriber based on their historical engagement patterns. This machine learning approach continuously adapts to changing subscriber behavior, automatically adjusting timing predictions when someone’s schedule changes.
Special Campaign Types: Tailored Timing
Abandoned Cart Emails
Optimal Timing: Within 1 hour of the initial trigger, or 10 AM the next business day
Why: Recency is crucial for cart recovery. If batching these emails, mid-morning tends to outperform early or late-day sends.
Promotional Emails and Special Offers
Optimal Timing: Thursday between 6-7 PM
Why: People are checking email before leaving work and are mentally preparing for the weekend, making them more receptive to special offers.
Newsletters
Optimal Timing: Monday between 4-6 PM
Why: Newsletters perform well when subscribers aren’t immediately distracted. Monday afternoon catches people settling into their week with some available attention.
Surveys and Feedback Requests
Optimal Timing: Sunday at 9 AM or Wednesday at 4 PM
Why: Surveys do better when subscribers aren’t distracted. Sunday mornings show a 49.6% open rate for surveys, and mid-week afternoons strike the right balance between attention and low inbox competition.
The Critical Role of the First Hour
One of the most important findings from email research is that 23% of all email opens occur during the first hour after delivery. After 24 hours, an email’s chance of being opened drops below 1%.
This means that poor timing doesn’t just reduce engagement—it essentially eliminates the opportunity for your email to be read at all. If your email arrives at the wrong time, it gets buried in the inbox and never recovers.
How to Optimize Email Timing for Your Specific Audience
While these broad recommendations provide an excellent starting point, the most successful email marketers go beyond generic advice. Here’s how to find the optimal timing for your unique audience:
1. Start with Data-Driven Hypotheses
Begin by testing timing based on solid assumptions. For example: “Our audience engagement rate is higher for emails sent on Thursday morning than Friday afternoon.” This gives your testing direction and purpose.
2. Conduct Rigorous A/B Testing
When testing send times, follow these best practices:
- Test one variable at a time: If you change both your subject line and send time, you won’t know which caused the performance difference
- Wait 48-72 hours: It takes time for people to work through their inboxes. Don’t call a winner too early
- Send to at least 1,000 recipients per variation: Smaller sample sizes may produce statistically insignificant results
- Send both variations simultaneously: If testing send time, ensure other factors remain constant
- Account for seasonality: Holidays, news events, and seasonal factors can skew results, so longer testing periods increase validity
3. Segment Your Audience
Not all subscribers behave the same way. Segment your list by:
- Job function or seniority (especially important for B2B)
- Geographic location and time zone
- Device type (mobile vs. desktop usage patterns differ)
- Engagement history (long-term subscribers may have different patterns than new ones)
- Industry or customer type
4. Monitor Key Metrics
Track more than just open rates. Pay attention to:
- Open rates by time zone
- Click-through rates by send time
- Conversion rates by send time
- Time to response (how quickly people reply)
5. Continuously Iterate and Adapt
Email engagement patterns aren’t static. Consumer behavior changes, industries evolve, and individual subscriber habits shift. The most successful marketers continuously test and refine their send times based on accumulated data.
Common Mistakes to Avoid
1. Sending Too Late in the Day
Emails sent after 6 PM experience significantly lower engagement compared to daytime sends. Late evening and night are generally the worst times to send emails.
2. Ignoring Time Zones
Sending a batch email at 9 AM EST doesn’t account for West Coast subscribers who receive it at 6 AM, or international audiences in completely different time zones. Use time zone-aware sending or Send Time Optimization to address this.
3. Assuming One Size Fits All
What works for promotional campaigns won’t work for transactional emails. What works for B2B won’t work for B2C. Your send time strategy should reflect your specific campaign type and audience.
4. Not Testing Systematically
Too many marketers rely on generic “best practices” without testing them against their own data. The optimal send time for your audience might differ from the broad research findings.
5. Missing the First Hour Window
Remember that 23% of opens happen in the first hour. If your email arrives at an inconvenient time, it misses this critical window entirely.
The Psychology Behind Email Timing
Beyond the data, email timing taps into fundamental human psychology. Your prospect’s brain has limited cognitive resources, and throughout the day their mental bandwidth fluctuates based on decision fatigue, stress levels, and competing priorities.
When your email arrives during a high-cognitive-load moment, it faces an uphill battle for attention. Research in behavioral psychology shows that people make snap decisions about email engagement within 2-3 seconds of seeing a subject line. If they’re already overwhelmed, your email gets mentally categorized as “deal with later”—which usually means never.
The three windows of opportunity throughout a professional’s day are:
- The Morning Planning Window (6-8:30 AM): Highest cognitive bandwidth, but intense competition
- The Midday Reset (11:30 AM-1:30 PM): Secondary opportunity with less inbox clutter
- The End-of-Day Review (4-6 PM): Final check before work ends
Practical Implementation: Making It Easy
Fortunately, you don’t need to manually schedule each email. Most modern email platforms offer features that automate optimal timing:
- Scheduled sending: Set campaigns to go out at specific times
- Time zone-based sending: Automatically adjust for recipient location
- Smart send time: AI-powered features that identify optimal times based on recipient behavior
- Automation workflows: Trigger emails at optimal times based on user actions
Conclusion: Find Your Rhythm
The research is clear: emails sent on Tuesday through Thursday between 9 AM and 12 PM achieve the best results for most audiences. This is your starting point.
However, the most successful email marketers understand that timing isn’t one-size-fits-all. Your optimal send time depends on:
- Your industry and audience type (B2B vs. B2C)
- Your campaign goals and message type
- Your subscriber’s geographic location and time zone
- Your specific audience’s unique behavior patterns
Start with the data-driven recommendations in this guide. Then implement a systematic testing program to find what works best for your audience. Monitor your metrics continuously, adapt to changing patterns, and never stop optimizing.
Remember: good timing doesn’t guarantee success, but poor timing almost guarantees failure. By mastering email send times, you give your carefully crafted messages the best possible chance of being seen, read, and acted upon.
Sources
OptinMonster. (2025). “The Best Time to Send Emails in 2026 Revealed!” https://optinmonster.com/the-best-time-to-send-emails-heres-what-studies-show/
SuperOffice. (2023). “Email Open Rates: A Scientific, Step by Step Guide.” https://www.superoffice.com/blog/email-open-rates/
EngageBay. (2025). “What is the Best Time To Send Emails? (2025)” https://www.engagebay.com/blog/best-times-send-emails/
Pipedrive. (2025). “Best Time to Send an Email in 2025.” https://www.pipedrive.com/en/blog/best-time-to-send-an-email
Campaign Monitor. (2022). “Best Time to Send Email Campaigns Tested.” https://www.campaignmonitor.com/blog/email-marketing/best-time-to-send-email-campaigns-by-device/
Results Driven Marketing. (2025). “Best Email Sending Times 2025.” https://rdmarketing.co.uk/knowledge-hub/best-email-sending-times/
Mailshake. (2025). “The Best Time To Send an Email in 2025, According to Data.” https://mailshake.com/blog/best-time-to-send-email/
MarketingSherpa. (2013). “Infographic: Email open rates by time of day.” https://sherpablog.marketingsherpa.com/email-marketing/open-rates-by-time/
Aweber. (2025). “Best Time to Send Emails: What the Data Really Says.” https://blog.aweber.com/learn/best-time-to-send-emails.htm
Moosend. (2025). “Best day to send campaigns.” https://moosend.com/blog/best-time-to-send-an-email/
Klaviyo. (2024). “Average Email Open Rates For…” https://www.klaviyo.com/blog/best-day-to-send-emails
Monday.com. (2025). “Send Time Optimization: Deliver Emails When Your Subscribers Are Most Likely to Engage.” https://monday.com/blog/monday-campaigns/send-time-optimization/
YAMM. (2024). “What is the Best Time to Send Marketing Emails?” https://yamm.com/blog/what-is-the-best-time-to-send-marketing-emails/
AudiencePoint. (2025). “What Day of the Week Has the Best Email Open Rate?” https://audiencepoint.com/what-day-of-the-week-has-the-best-email-open-rate/
MailPool. (2025). “Time Zone Strategy: Managing Global Cold Email Campaigns.” https://www.mailpool.ai/blog/time-zone-strategy-managing-global-cold-email-campaigns
Brevo. (2025). “The Best Time to Send an Email: Day, Hour, Industry [New Data].” https://www.brevo.com/blog/best-time-to-send-email/
Bloomreach. (2025). “Email Send Times: Best Practices & AI Solutions.” https://www.bloomreach.com/en/blog/determining-email-send-times-why-it-matters-best-practices-and-ai-solutions
HubSpot. (2023). “The Best Time to Send an Email [2023 Research].” https://blog.hubspot.com/marketing/best-time-to-send-email
Converting.Email. (2025). “When to Send Emails Based on Your Customer’s Buying Cycle.” https://converting.email/email-marketing/the-science-of-timing-when-to-send-emails-based-on-your-customers-buying-cycle/
Litmus. (2025). “How to Run A/B Tests on Your Emails.” https://www.litmus.com/blog/email-ab-testing-how-to
MailerIO. (2025). “Email Bounce Rate Benchmark 2025.” https://mailerio.com/blog/email-bounce-rate-benchmark/
NCBI/PMC. (2024). “Social information as an entrainment cue for the circadian clock.” https://pmc.ncbi.nlm.nih.gov/articles/PMC11262420/
E-shot. (2024). “Email A/B Testing Best Practices.” https://www.e-shot.net/insights/blog/email-a-b-testing-best-practices
ZeroBounce. (2024). “The Email Bounce Rate Benchmark.” https://www.zerobounce.net/blog/email-resources/email-verification/email-bounce-rate-benchmark
MailPool. (2025). “The Psychology of Cold Email: Why Timing Beats Perfect Copy Every Time.” https://www.mailpool.ai/blog/the-psychology-of-cold-email-why-timing-beats-perfect-copy-every-time
Klaviyo. (2025). “Guide to A/B Testing Email Marketing Campaigns.” https://www.klaviyo.com/uk/blog/ab-testing-email-best-practices
MetricsWatch. (2025). “Best Practices for Email Campaign Bounce Rates.” https://metricswatch.com/insights/best-practices-for-email-campaign-bounce-rates
Be-Sapiens. (2025). “Circadian Rhythm Mastery: Synchronize your Calendar.” https://be-sapiens.com/research-posts/circadian-rhythm-mastery-synchronize-your-calendar