10 High-Converting Abandoned Cart Email Subject Lines (And How to Optimize Them with AI)

With nearly 70% of online shopping carts abandoned, recovering lost sales is a top priority for ecommerce brands. In this article, we’ll share 10 high-converting abandoned cart email subject lines that grab attention, reignite interest, and guide customers back to complete their purchase. Don’t let those sales slip away!

Want to see Maverick in action? Tell us your name and we will send you an AI generated personalized video.

Did you know that a whopping 69.82% of online shopping carts are abandoned? That's like filling your store with eager shoppers, only to have them vanish into thin air just before checkout! 

Talk about a heartbreaking revenue leak. But fear not, e-commerce heroes, for there's a secret weapon to win back those wandering hearts (and wallets): abandoned cart emails.

These digital love letters are your chance to rekindle the flame, reminding customers of the treasures they left behind and gently nudging them towards a happy ending (aka a completed purchase). But like any good love letter, it all starts with a captivating subject line. Think of it as the first impression, the flirty wink that makes them want to read more.

A killer abandoned cart email subject line can be the difference between a lost sale and a recovered customer. It's your opportunity to pique their curiosity, re-ignite their desire, and ultimately, guide them back to your loving embrace (and that "Complete Purchase" button).

So, without further ado, let's unveil 10 high-converting abandoned cart email subject lines that will have your customers swooning (and your sales soaring):

1. “Forget Something?” (Fabletics)

Why It Works:

This subject line from women’s sportswear brand, Fabletics taps into a fundamental psychological trigger: the Zeigarnik effect. This effect states that people remember unfinished or interrupted tasks better than completed ones.

By simply asking "Forget Something?", you subtly remind the customer of their incomplete purchase, prompting them to revisit their abandoned cart. It's a direct, no-nonsense approach that works best when sent shortly after cart abandonment, capitalizing on the customer's immediate intent to purchase.

Tip for Optimization:

While personalization is generally a good idea, consider A/B testing this subject line without the customer's name. It might seem counterintuitive, but sometimes a slightly more generic approach can actually perform better for abandoned cart emails.

This is because it creates a sense of subtle intrigue, prompting the customer to open the email to see what they might have forgotten. Use Optimizer to test variations with and without personalization to see what resonates best with your audience and drives the highest open rates and conversions.

2. “Distracted? Confused?” (Bonobos)

Why It Works:

This subject line from men’s fashion brand, Bonobos cleverly uses empathy and curiosity to re-engage the customer. By asking "Distracted? Confused?", you acknowledge that there might be a genuine reason for cart abandonment.

This approach makes the customer feel heard and understood, rather than simply bombarded with another sales pitch. It also piques their curiosity, prompting them to open the email to see how you can help. This subtle show of concern can build rapport and increase the likelihood of the customer completing their purchase.

Tip for Optimization:

While this subject line is effective on its own, consider using Optimizer to A/B test variations that include a specific element of personalization. For example, you could test:

·         "Distracted? Confused about those [product name]?"

·         "Still thinking about that [product category], [First Name]?"

This adds a layer of personalization that can further pique the customer's interest and remind them of the specific items they left behind. By testing different levels of personalization, you can identify the sweet spot that maximizes open rates and conversions for your audience.

3. “Free Shipping On Your Huckberry Order” (Huckberry)

Why It Works:

This subject line leverages the power of incentives to entice customers back to their abandoned carts. Free shipping is a highly effective motivator for online shoppers, as it directly addresses a common pain point: unexpected costs.

By clearly stating the incentive in the subject line, lifestyle brand Huckberry creates a sense of immediate value and encourages customers to reconsider their purchase. This tactic is particularly effective for price-sensitive shoppers or those who might have abandoned their cart due to high shipping costs.

Tip for Optimization:

While offering free shipping is a strong incentive, consider using Optimizer to A/B test variations that combine it with a sense of scarcity or urgency. For example, you could test:

·         "Free shipping on your Huckberry order (today only!)"

·         "Last chance for free shipping on your Huckberry cart"

·         "Free shipping ends soon! Complete your Huckberry order now"

4. “Get it before it’s gone” (Chatters)

Why It Works:

This subject line masterfully employs the psychological principle of loss aversion, which states that people are more motivated to avoid losses than they are to acquire gains.

By implying that the items in the customer's cart might soon be unavailable, hair products brand Chatters triggers a fear of missing out (FOMO). This sense of scarcity creates a sense of urgency, pushing customers to complete their purchase before it's too late.

Tip for Optimization:

While this subject line effectively leverages FOMO, consider using Optimizer to A/B test variations that add a specific reason for the scarcity. For example, you could test:

·         "Get it before it's gone! This sale ends soon."

·         "Get it before it's gone! Limited stock available."

·         "Get it before it's gone! Popular items are selling out fast."

By providing a concrete reason for the scarcity, you add credibility to your FOMO message and make it even more persuasive. This can be particularly effective for customers who are skeptical of marketing tactics or who need an extra nudge to complete their purchase.

5. “Davis, the journey to London Kings Cross won’t be the same without you (London North Eastern Railway, LNER)

Why It Works:

This subject line combines personalization and a touch of humor to re-engage the customer. By directly addressing the customer by name ("Davis") and using a playful tone ("won't be the same without you"), train operating company LNER creates a sense of personal connection and lightheartedness.

This approach can be more effective than a generic reminder, as it shows the customer that they are valued and that their intended journey is important. The mention of the specific destination ("London Kings Cross") further reinforces the personalization and reminds the customer of their travel plans.

Tip for Optimization:

While this subject line effectively uses personalization, consider using Optimizer to A/B test variations that incorporate dynamic content related to the customer's browsing history or past purchases. For example, if the customer previously booked a first-class ticket, you could test:

·         "Davis, your first-class journey to London Kings Cross awaits!"

Or, if the customer browsed travel packages, you could test:

·         "Davis, complete your London adventure with this travel package!"

This adds a layer of hyper-personalization that can further pique the customer's interest and remind them of the specific value they were considering. By testing different dynamic content elements, you can identify what resonates best with your audience and drives the highest engagement.

6. “Hey, forget something? Here’s 20% off” (Bonobos)

Why It Works:

This subject line combines a direct reminder with an enticing incentive, creating a powerful combination to win back customers. The casual "Hey" grabs attention, while "forget something?" triggers the Zeigarnik effect, reminding customers of their incomplete purchase.

The real kicker is the clear and immediate offer of "20% off," which provides a strong incentive to return and complete their Bonobos order. This tactic appeals to customers' desire for value and savings, making it a highly effective way to recover abandoned carts.

Tip for Optimization:

While a 20% discount is enticing, consider using Optimizer to A/B test variations with different types of incentives. For example, you could test:

·         "Hey, forget something? Get free shipping!"

·         "Hey, forget something? Here's a free gift with your order!"

·         "Hey, forget something? Enjoy a surprise discount inside!"

This allows you to identify which incentives resonate best with your audience and drive the highest conversion rates. You might discover that free shipping or a mystery offer performs even better than a standard percentage discount. This data-driven approach ensures that your abandoned cart emails are always optimized for maximum impact.

7. “I did some investigating” (Chubbies)

Why It Works:

This subject line uses humor and curiosity to stand out in a crowded inbox and re-engage the customer. Clothing brand Chubbies, known for its playful and irreverent brand personality, injects humor into its abandoned cart email strategy.

The subject line "I did some investigating" is unexpected and intriguing, prompting the customer to open the email to discover what the "investigation" uncovered. This approach can be particularly effective for brands that cultivate a fun and lighthearted image, as it aligns with their overall brand voice and creates a memorable experience for the customer.

Tip for Optimization:

While this subject line is inherently engaging, consider using Optimizer to A/B test variations that incorporate a personalized element or a specific product reference. For example, you could test:

·         "[First Name], I did some investigating about those swim trunks..."

·         "I did some investigating... and found your perfect pair of shorts!"

Adding a touch of personalization or product relevance can further pique the customer's curiosity and remind them of the specific items they left behind. This can lead to higher open rates and click-through rates, ultimately driving more conversions and contributing to your ecommerce optimization efforts.

8. “It’s Still In Stock – But Not For Long” (American Giant)

Why It Works:

This subject line from actvewear brand American Giant is a masterclass in subtle persuasion. It combines a direct reminder ("It's Still In Stock") with a gentle nudge of FOMO ("But Not For Long"). This creates a sense of urgency without being overly pushy, encouraging the customer to return to their cart without feeling pressured.

The open-ended nature of the subject line also sparks curiosity – what exactly is in stock? How long will it be available? This intrigue can lead to higher open rates and click-through rates.

Tip for Optimization:

While this subject line is already concise and effective, consider using Optimizer to A/B test variations that add a touch of personalization. For example, you could test:

·         "[First Name], it's still in stock – but not for long!"

·         "Your [product name] is waiting, [First Name] (but not for long!)"

Adding the customer's name can create a sense of personal connection and increase the likelihood of them opening the email. However, be mindful of your brand voice and target audience. If your brand leans towards a more formal or minimalist approach, a generic subject line might perform better. Use Optimizer to test both variations and see what resonates best with your customers.

9. “♫ Owner of a Lonely Cart ♫” (Timberland)

Why It Works:

This subject line uses a playful and unexpected approach to grab the customer's attention. By referencing a popular song ("Owner of a Lonely Heart" by Yes) and incorporating music notes, iconic boots brand Timberland creates a sense of humor and lightheartedness.

This can be particularly effective for brands targeting younger audiences or those with a playful brand personality. The unusual format, with the music notes and song reference, also helps the email stand out in a crowded inbox, increasing the likelihood of it being opened.

Tip for Optimization:

While this subject line is already creative and engaging, consider using Optimizer to A/B test variations that incorporate a specific product or category mention. For example, you could test:

·         "♫ Owner of a lonely [product category] cart ♫"

·         "Those [product name] are feeling lonely in your cart ♫"

This adds a layer of relevance and can further pique the customer's interest by reminding them of the specific items they left behind. It might seem counterintuitive to add more text to an already playful subject line, but testing with Optimizer can reveal whether this added specificity improves open rates and conversions.

10. “Your Man Crates Cart is Expiring – Save 10% Before it Does!” (Man Crates)

Why It Works:

This subject line masterfully blends urgency, scarcity, and incentive to create a powerful motivator. By stating that the cart is "expiring," men’s gifts brand Man Crates triggers a fear of missing out (FOMO), implying that the items or the offer won't be available for long.

This sense of urgency is further amplified by the promise of a 10% discount, creating a compelling reason for the customer to act immediately. The specific mention of "Man Crates" reinforces brand recognition and reminds the customer of the unique and desirable products they were considering.

Tip for Optimization:

While this subject line effectively uses FOMO and incentives, consider using Optimizer to A/B test variations that introduce an element of surprise or mystery. For example, you could test:

·         "Your Man Crates Cart is Expiring – Unlock a Surprise Inside!"

·         "Don't Miss Out! Your Cart is Expiring + a Secret Offer Awaits."

This approach can pique the customer's curiosity and create a sense of anticipation, making them more likely to open the email to discover the surprise. By testing different approaches to FOMO and incentives, you can identify the most effective combination for your audience and maximize your abandoned cart recovery rate.

Beyond Subject Lines: Crafting Effective Abandoned Cart Emails

While a captivating subject line is crucial for getting your abandoned cart email noticed, it's only the first step in winning back those wayward customers. Think of it as the enticing storefront window display that draws shoppers in – but what happens once they step inside? To truly seal the deal and recover those lost sales, you need a well-orchestrated symphony of persuasive elements working in harmony.

1. Preview Text: The Enticing Whisper

Preview text is the Robin to your subject line's Batman, the sidekick that delivers a powerful one-two punch. It's your chance to whisper sweet nothings into your customer's ear, offering a tantalizing glimpse of what awaits them inside the email.

Don't waste this valuable real estate with generic phrases like "View in browser." Instead, use it to complement your subject line and provide a compelling reason to open. For example, if your subject line is "Forget something?", your preview text could be "Your [product name] is waiting for you!" or "Complete your purchase and get free shipping!"

2. Email Content: The Art of Persuasion

Once you've lured customers in with a captivating subject line and preview text, it's time to woo them with persuasive copy and visuals. Don't just bombard them with product images and a generic "Buy Now" button.

Instead, craft a compelling narrative that reminds them of the value your product offers and addresses any potential hesitations they might have. Use high-quality images, clear and concise copy, and a touch of personality to create an engaging experience that rekindles their desire for the items in their cart.

3. Call to Action (CTA): The Guiding Light

Your call to action (CTA) is the North Star guiding your customers towards the ultimate destination: completing their purchase. Make it clear, concise, and impossible to miss.

Instead of a generic "Shop Now" button, consider using more specific and action-oriented CTAs like "Complete My Order," "Claim My Discount," or "Get My [Product Name] Now." Place your CTA prominently within the email and repeat it multiple times to ensure it catches the customer's eye.

4. Personalization: The Secret Weapon

Personalization is the secret sauce that transforms a generic email into a tailored experience. Address the customer by name, remind them of the specific items they left behind, and offer personalized product recommendations based on their browsing history.

But don't over-personalize. While a touch of personalization is delightful, bombarding customers with hyper-specific details can feel invasive. Find the sweet spot between helpful and creepy, using personalization to enhance the customer experience without crossing the line into stalker territory.

5. Offers and Incentives: The Sweetener

Sometimes, a little sweetener is all it takes to nudge a customer towards the checkout. Offer a discount, free shipping, or a bonus gift to incentivize them to complete their purchase. But here's a counterintuitive idea: don't always lead with the discount.

Instead, try reminding the customer of the product's value and benefits first, then offer the incentive as an extra nudge. This can make the offer feel more exclusive and less like a desperate attempt to recover a lost sale.

By mastering these essential elements, you can transform your abandoned cart emails from forgettable reminders into persuasive masterpieces that re-engage customers, recover lost sales, and contribute to your overall ecommerce optimization strategy.

Conclusion

Congratulations! You've mastered the art of crafting captivating abandoned cart email subject lines and learned the secrets of persuasive email content. Now, it's time to unleash your newfound knowledge and watch those abandoned carts transform into recovered revenue.

Think of abandoned cart emails as your digital shopping assistants, gently guiding lost customers back to the checkout aisle. With a witty subject line, a touch of personalization, and a sprinkle of incentive, you can rekindle their desire and turn those abandoned carts into a sales bonanza.

Remember those savvy marketers at NuStrips, who used Optimizer to boost their Klaviyo email flow revenue by a staggering 19%? They didn't just recover abandoned carts; they turned them into a goldmine of conversions! With a 114% lift in open rates for optimized emails in their Sleep Fulfillment Flow, they proved that AI-powered optimization can lead to e-commerce ecstasy.

Now it's your turn. Are you ready to ditch those abandoned cart blues and embrace a future of recovered sales and happy customers?

Don't let abandoned carts haunt your e-commerce dreams. Embrace the power of AI with Maverick Optimizer.

Without Optimizer, you're stuck in the abandoned cart wilderness: manually testing subject lines, guessing at the right incentives, and watching potential revenue vanish into the digital abyss. But with Optimizer, you'll become an abandoned cart whisperer:

  • Crafting subject lines that sing and dance, captivating your customers and boosting open rates.
  • Personalizing your emails with AI-powered precision, reminding each customer why they fell in love with your products in the first place.
  • A/B testing your way to abandoned cart mastery, uncovering the secret formula for recovering lost sales.
  • Integrating seamlessly with Klaviyo, your trusty e-commerce sidekick, for a smooth and efficient recovery mission.

Ready to turn those abandoned carts into a revenue parade? Try Optimizer today and let AI lead the way to e-commerce glory. 

Maximize email conversion & engagement through automatically AI optimized emails

Background gradient.
Background gradient.
By clicking “Accept All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. View our Privacy Policy for more information.