14 Email Subject Line Statistics that you need to know

ByMashkoor Alam


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Email subject lines play a crucial role in email marketing. They determine whether your emails get opened or ignored. To create compelling subject lines, you need insights from email subject line statistics. In this blog, we'll delve into subject line data, sharing insights and strategies to enhance your email campaigns. Let's get started and elevate your email marketing with statistics.

Table of Contents

How do we collect this data?

We compile these statistics from credible sources, including reputable platforms like Statista, as well as comprehensive marketing reports from various renowned email marketing platforms. Our commitment to data accuracy ensures the reliability of the information we provide.

14 Email Subject Line Statistics

  1. 64% of recipients decide to open or delete emails based on subject lines (Source: HubSpot)

  2. 33% of users choose to open emails because of catchy subject lines (Source: HubSpot)

  3. A subject line alone is enough to entice 47% of email recipients to open the email. (Source: Zippia)

  4. 69% of email recipients will report spam based on the email subject line (Source: Zippia)

  5. On average, email subject lines between 61-70 characters are read the most, at 17% (Source: Zippia)

  6. Personalized subject lines are 26% more likely to be opened (Source: Paubox)

  7. Email subject lines with questions have a 50% higher open rate (Source: hubsell)

  8. Subject lines with numbers have a 17% higher open rate (Source: OptinMonster)

  9. 21- to 25-word subject lines only have a 9% open rate (Source: FinancesOnline)

  10. Subject lines comprising 6 to 10 words achieve the highest open rate, standing at 21%. (Source: FinancesOnline)

  1. Email subject lines that have up to 5 words in them have an open rate of 16% (Source: FinancesOnline)

  2. The mere presence of the term "newsletter" can result in an 18% reduction in open rates, while subject lines featuring "you" may lead to a 5% decline in email open rates. (Source: OptinMonster)

  3. Emoji in the Subject Line has an open rate of 13.65 (Source: Mailmodo’s State of Email)

  4. The best email subject line for salespeople is “Re:”. (Source: ContactMonkey)

Wrap up

In the world of email marketing, subject lines are game-changers. They're the key to getting your emails opened. In this blog, we've uncovered stats and tips to boost your email campaigns. Armed with this knowledge, you can create subject lines that grab attention and make your emails stand out. If you think any of these statistics are inaccurate or irrelevant in any form or if you want to submit any relevant statistics, please email us at

What you should do next

Hey there, thanks for reading till the end. Here are 3 ways we can help you grow your business:

  1. Talk to an email expert. Need someone to take your email marketing to the next level? Mailmodo’s experts are here for you. Schedule a 30-minute email consultation. Don’t worry, it’s on the house. Book a meet here.

  2. Send emails that bring higher conversions. Mailmodo is an ESP that helps you to create and send app-like interactive emails with forms, carts, calendars, games, and other widgets for higher conversions. Get started for free.

  3. Check out our AI prompts library. If you need AI prompts for ChatGPT or Bing, here's a ready-made database we’ve built to help marketers succeed at prompt engineering. Get your AI prompts here.

  4. Get smarter with our email resources. Explore all our knowledge base here and learn about email marketing, marketing strategies, best practices, growth hacks, case studies, templates, and more. Access guides here.

What should you do next?

Thanks for reading till the end. Here are 3 ways we can help you grow your business:


Get smarter with our email resources

Explore our email marketing guides, ebooks and other resources to master email marketing.


Do better email marketing with Mailmodo

Send app-like interactive emails with forms, carts, calendars, games, etc. to boost email ROI.


Talk to an email expert

Get a 30-min. free email consultation with a Mailmodo expert to optimize your email marketing.

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