10 Tips for Writing Killer Email Subject Lines

Email marketing can be an effective way to reach your target audience and promote your business. However, with so many emails filling up people’s inboxes, it can be challenging to grab their attention and get them to open your email. One crucial aspect of email marketing is crafting a compelling subject line. In this blog post, Here are 10 tips for writing killer email subject lines that will help improve your open rates and drive engagement.

1. Keep it short and sweet

Your subject line should be concise and to the point. Aim for a length of around 50 characters or less, as longer subject lines may get cut off on mobile devices. Use clear and simple language that accurately reflects the content of your email.

2. Personalize it

Personalization is key to building a connection with your audience. Use the recipient’s name or refer to their interests, preferences, or past behavior to show that you understand and care about their needs.

3. Create urgency

Use urgent language in your subject line to create a sense of urgency that compels the recipient to act quickly. For example, “Last chance to save 50% on your order” or “Only 24 hours left to claim your free gift.”

4. Use numbers and statistics

Numbers and statistics can add credibility to your email and make it stand out in a sea of emails. For example, “5 ways to improve your productivity” or “Get 20% more leads with this marketing strategy.”

5. Be intriguing

Make your subject line intriguing to spark curiosity and encourage the recipient to open your email. Use a question or statement that piques their interest and leaves them wanting to learn more.

6. Use humor

If appropriate for your brand and audience, use humor to inject personality into your subject line. Humor can be an effective way to stand out and make a memorable impression.

7. Avoid spam trigger words

Avoid using words that trigger spam filters and send your email straight to the recipient’s spam folder. Common spam trigger words include “free,” “money,” “urgent,” and “buy now.”

8. A/B test your subject lines

Test different subject lines to see which ones perform best. A/B testing allows you to experiment with different wording, lengths, and styles to find what resonates with your audience.

9. Consider the time and day

Timing is critical when it comes to email marketing. Consider the time and day when your audience is most likely to be checking their email. Test different send times to see when you get the best open rates.

10. Be honest

Your subject line should accurately reflect the content of your email. Don’t use clickbait or misleading language to trick the recipient into opening your email, as this can damage trust and reputation.


Writing killer email subject lines is crucial for the success of your email marketing campaigns. Use these ten tips to create compelling subject lines that grab your audience’s attention, encourage them to open your email, and drive engagement. By these 10 Tips for Writing Killer Email Subject Lines, you can improve your open rates and ultimately achieve your email marketing goals.