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Out-of-stock email marketing: what to say (and what to avoid)

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Published Date:
June 5, 2026
Modified Date:
June 5, 2026

Out-of-stock email marketing is a key opportunity to maintain customer trust and interest, even when a product isn’t available. The best emails are transparent, honest, and proactive—letting customers know when or if the item will be restocked, and offering alternatives or restock alerts. Avoiding vague language, overpromising, or going silent is important, as this can lead to frustration and lost loyalty. A well-crafted message shows customers you value their time and builds confidence in your brand’s transparency.

Best practices for successful out-of-stock email

Effective inventory management and product availability are key to keeping customers happy and driving business success in e-commerce. When items go out of stock, it can lead to missed sales, frustrated customers, and damage brand reputation. To prevent these challenges, business owners can harness the power of best out-of-stock emails to automate stock notifications.

Out-of-stock emails can help to track stock levels, instantly detecting when supplies are running low or products are out of stock. When an item becomes unavailable, it can automatically generate personalized emails to notify customers. These emails can inform shoppers about the stock status and offer options to subscribe to back-in-stock alerts, keeping them engaged and informed.

Discover how right out-of-stock email marketing can turn customer disappointment into lasting loyalty, showing your shoppers that you truly value their experience. 

Understanding out-of-stock email

An out-of-stock email notifies customers that a product they’re interested in—or recently attempted to purchase—is currently unavailable. These messages are essential for maintaining transparency and managing expectations. Brands often use them to provide helpful details, such as estimated restock dates or alternative options like similar products. 

Because staying silent puts customer trust at risk, ignoring the issue or delaying shipments without communication can damage even the strongest customer relationships. On the other hand, timely and honest updates show you respect your customers’ time and loyalty. A thoughtful, best out-of-stock email can help prevent complaints, reduce the load on customer service, and protect your online reputation.

Effective out-of-stock email templates:

Restock notification email template

A restock notification email template is crucial for e-commerce businesses to recapture potential sales and enhance customer satisfaction. Its primary function is to inform customers that a previously unavailable product is now back in stock, prompting them to complete their purchase. This type of email serves as a direct communication channel, bridging the gap between customer interest and product availability. By leveraging this communication, businesses can effectively re-engage customers who have already desired to purchase a specific item. 

The out-of-stock email subject line of a restock notification email is paramount. It should be clear and concise and immediately convey that the desired item is available. Words like "Back in Stock!" or "Your Item is Available!" grab the customer's attention. Additionally, incorporating a sense of urgency can further incentivize immediate action. A compelling subject line significantly increases the open rate of the email, ensuring that the customer is aware of the product's availability.

Alternative product suggestion email template

The alternative product suggestion email template is a powerful tool for e-commerce businesses to navigate the often-tricky situation of product unavailability. Its core purpose extends beyond simply informing customers that their desired item is out of stock; it aims to retain potential sales by proactively offering viable alternatives. This template is designed to transform a potentially negative customer experience into a positive one. By presenting relevant alternative products, businesses can prevent customers from abandoning their purchases and redirect them toward other items that meet their needs.

An important aspect of this template is its ability to enhance the customer experience. Customers might feel disappointed or frustrated when they encounter an out-of-stock notification. However, by immediately offering alternative suggestions, businesses demonstrate attentiveness and helpfulness. This approach addresses the customer's immediate need and reinforces a perception of excellent customer service. By providing options and solutions, businesses can maintain customer engagement and foster a sense of trust.

Exclusive pre-order email template

An exclusive pre-order email template is a strategic marketing tool to generate excitement and drive early sales for upcoming products or services. It leverages exclusivity and anticipation to encourage customers to commit to a purchase before the official release. This template aims to create a sense of urgency and privilege, fostering a strong connection between the customer and the brand.

The primary purpose of an exclusive pre-order email is to capitalize on the initial buzz surrounding a new product or service. Businesses can generate early revenue and gauge demand by offering customers the opportunity to secure their purchase ahead of the general public. This approach drives immediate sales and creates a sense of exclusivity, making customers feel valued and privileged.

Backorder confirmation email template

The backorder confirmation email template for out-of-stock items is a vital communication tool for e-commerce businesses to manage the delicate situation of informing customers about delayed product shipments. Its core purpose extends beyond simply notifying customers of a backorder; it aims to maintain transparency, manage customer expectations, and ensure customer satisfaction despite the inconvenience. This template is designed to foster a sense of trust and reliability, even when faced with logistical challenges.

A primary function of this template is to establish clear and honest communication. Immediately informing customers about the backorder status demonstrates a commitment to transparency and avoids potential frustration caused by unexpected delays. By providing timely updates, businesses can mitigate customer dissatisfaction and build trust. This approach ensures that customers feel informed and valued, even when their order is delayed.

How to send an out-of-stock email

Notify customers as soon as possible

In e-commerce, prompt and transparent communication is essential for customer trust and satisfaction. Customer Value Optimization (CVO) is a strategic approach that focuses on maximizing the value a customer brings to a business throughout their entire relationship. It goes beyond acquiring new customers; it emphasizes retaining existing ones, increasing spending, and fostering long-term loyalty. By prioritizing clear and timely updates, businesses demonstrate respect for their customers' time and investment, fostering a sense of reliability and dependability.

For example, imagine a customer eagerly awaiting a hand-painted ceramic dinnerware they ordered. Upon discovering the item is back-ordered, the brand shouldn't delay sending a personalized email. This email should immediately acknowledge the customer's order, express sincere apologies for the delay, and provide a clear explanation.

Provide a reason (without making it sound like an excuse)

Maintaining customer trust hinges on transparent and proactive communication in the dynamic landscape of modern commerce, particularly within specialized sectors like the supplements industry. Businesses must prioritize clear, concise, and empathetic messaging when faced with unforeseen stock shortages or backorders. Providing customers with factual reasons for delays, without resorting to excuses demonstrates a commitment to integrity and quality. This approach manages customer expectations and reinforces the brand's values and dedication to delivering superior products.

A customer expecting a specific protein powder might receive a backorder notification in the supplements industry. Instead of framing the delay as a problem, the communication should focus on transparency and managing expectations. This approach emphasizes the brand's dedication to quality and responsible sourcing, transforming a potential negative into a demonstration of its values. It reframes the delay as a consequence of their commitment rather than a logistical issue.

Offer alternative or similar products

When informing customers about an out-of-stock item, particularly within the alcohol industry, offering well-considered alternatives can significantly enhance their shopping experience; instead of simply stating an item's unavailability, present two or three comparable products currently in stock, complete with direct links and appealing images. This approach caters to the customer's initial intent while providing immediate, viable options. 

For example, if a limited-edition single malt whiskey is unavailable, suggest a similar aged whiskey from the same region or a highly rated bourbon with comparable flavor notes. By providing personalized recommendations, alcohol brands prevent lost sales and introduce customers to new products they might enjoy. Furthermore, this strategy could increase the average order value, as customers may decide to add additional items to their cart when selecting a replacement. This thoughtful, proactive approach reinforces the brand's commitment to customer satisfaction and enhances the shopping experience.

Add estimated restock time

Providing an estimated restock time frame is essential to alleviate customer frustration stemming from out-of-stock items, particularly within the health and fitness sector. Informing customers about the approximate availability of new products helps manage their expectations and maintains their interest. While a precise delivery date, accompanied by a countdown timer to create urgency, is ideal, it's rarely feasible in the dynamic world of e-commerce inventory. Offering a reasonable estimate is therefore a better option. 

For example, a health and fitness brand might communicate, "We anticipate restocking the popular products, like our high-demand protein bars, within the next ten business days," or "Expected availability early next month." These phrases offer a tangible timeframe, allowing customers to plan accordingly. Furthermore, it's crucial to provide customers with the option to receive back-in-stock notifications, ensuring they are promptly alerted when the desired product, such as their preferred electrolyte supplement, becomes available again. This proactive approach demonstrates a commitment to customer service and helps retain potential sales.

Give them an incentive to shop with you again

To rekindle the interest of disappointed customers facing out-of-stock items, particularly within the baby products sector, offering carefully curated incentives can significantly boost engagement and drive conversions. While a straightforward apology and restock notification might suffice, a more proactive approach can yield greater results. Consider strategically placing incentives within the email, such as a discount code for future purchases or complimentary shipping on their next order, accompanied by clear instructions on how and when to redeem them.

However, if budgetary constraints limit the ability to offer discounts, alternative strategies can be equally effective. For example, offering early access to new product releases or exclusive pre-order options for upcoming baby essentials can create a sense of privilege and anticipation. Coupled with targeted product recommendations based on the customer's past purchases or browsing history, this approach can be highly compelling. For instance, a baby brand could offer early access to a new line of organic cotton clothing or a pre-order option for a limited-edition stroller. By crafting engaging messaging and compelling copy that highlights the unique benefits of these offerings, baby brands can effectively recapture customer interest and drive sales, transforming a potentially negative experience into a positive one.

Follow up with a clear call to action

Simply informing customers about an out-of-stock beauty or skincare product, without guiding them toward further engagement, misses a crucial opportunity. To maximize the effectiveness of these emails, it's essential to incorporate a clear and compelling call-to-action (CTA). Beyond explaining the issue and outlining the resolution, provide customers with actionable steps to reconnect with your brand.

For instance, redirect them to the product page with a prominent "Notify Me When Back In Stock" button, ensuring they're promptly alerted when their desired serum or moisturizer is available. Alternatively, offer a limited-time discount code for their next purchase, encouraging them to explore other products in your skincare line. Due to the inconvenience, consider extending the redemption period slightly as a gesture of goodwill.

Share customer service information

While out-of-stock emails for medical-grade light therapy treatments primarily serve to inform and address potential customer anxieties, providing readily accessible customer service contact information is essential. This establishes a direct line of communication, demonstrating your willingness to address any lingering questions or concerns.

Acknowledging that customer inquiries, while sometimes challenging, are valuable opportunities for feedback, consider including a comprehensive FAQ section within the email. This can proactively address common questions related to backorders, shipping delays, and alternative treatment options, minimizing the need for direct customer service interaction.

Clearly outline the next steps for customers impacted by the out-of-stock situation. Detail the refund process, including timelines and methods, and clarify the status of any other items included in their order. For example, specify whether the remaining products will ship separately or if the entire order will be held until the light therapy treatment is available. This level of detail ensures transparency and reduces potential confusion, fostering trust and confidence in your brand.

What to avoid with out-of-stock email marketing

Vague language

Avoid using phrases like "soon" or "eventually" regarding restock dates. This creates uncertainty and frustration. Instead, provide specific dates or timeframes, such as "within two weeks" or "by mid-July." Failing to do so can lead to a loss of customer trust, as they may perceive the lack of clarity as a lack of reliability. Always strive for precision to manage customer expectations effectively.

Ignoring the customer's interest

Sending a generic "item unavailable" email is impersonal and dismissive. Customers appreciate the acknowledgment of their specific interest in a particular product. Begin your email by referencing the exact item they were looking for, demonstrating that you value their individual needs. This shows them that you are paying attention to their purchase intent, and are not just sending mass emails.

Over-promising

Providing a restock date you cannot guarantee is worse than giving no date. If delays occur, you'll break customer trust and create further disappointment. It's better to offer a conservative estimate or a broad timeframe and then update customers proactively if the situation changes. Honesty and transparency are paramount in maintaining customer confidence.

Excessive promotion

While offering alternative products is helpful, avoid turning the out-of-stock email into a sales pitch. Overly promotional language can feel insensitive and detract from the primary purpose of addressing the unavailability. Focus on providing helpful solutions and information rather than pushing additional sales. Keep the tone helpful and not overtly sales-driven.

Lack of follow-up

If you provide a restock date, failing to follow up when the item becomes available or if delays occur is a missed opportunity. Proactively communicating updates demonstrates your commitment to customer service and helps retain their interest. Sending a follow-up email, even to say there is a further delay, is better than no follow-up.

Missing contact info

Omitting customer service contact information leaves customers feeling stranded. Even if the email is informative, questions or concerns may arise. Providing clear and accessible contact details, such as a phone number or email address, ensures customers can easily reach out for assistance. This simple step can significantly improve customer satisfaction.

Lack of empathy

An out-of-stock situation can be frustrating for customers. Omitting a sincere apology can make them feel ignored or undervalued. Begin your email with a genuine expression of regret for the inconvenience caused. This shows that you understand their frustration and are committed to resolving it.

Email marketing tools to manage out-of-stock alerts

Several tools offer powerful solutions for enhancing customer communication and driving engagement when managing out-of-stock scenarios. Here's a breakdown of how Klaviyo, Justuno, and Yotpo can be used:

Klaviyo: This platform excels at creating personalized email flows, which are crucial for delivering targeted out-of-stock notifications and restock alerts. Its segmentation capabilities allow businesses to tailor messages based on customer behavior, such as purchase history and browsing activity. Automated back-in-stock notifications ensure customers are promptly informed when desired items are available. Klaviyo email marketing enables the display of relevant product recommendations and incentives, enhancing the customer experience. Furthermore, its robust analytics and reporting provide valuable insights for optimizing campaign performance.

Justuno: This tool focuses on on-site messaging and pop-ups, allowing businesses to inform customers about out-of-stock items while browsing their websites proactively. This helps prevent frustration and facilitates immediate alternative product suggestions. Justuno's AI-powered recommendations engine provides personalized product suggestions, which can be seamlessly integrated into out-of-stock emails. Additionally, its A/B testing features enable businesses to optimize email messaging and design. Justuno is also valuable for capturing customer emails for back-in-stock notification lists via website integrations.

Yotpo: This platform enhances out-of-stock emails by integrating product reviews and user-generated content, which builds trust and credibility. Its visual marketing tools allow for the inclusion of high-quality images and videos, showcasing alternative products effectively. Yotpo's loyalty and referral programs provide incentives, turning potential negatives into positives and encouraging customer engagement. Yotpo also offers SMS marketing capabilities, which are particularly useful for time-sensitive notifications.

Concluding thoughts

In conclusion, out-of-stock email marketing is crucial for retaining customers and maximizing revenue. By focusing on clear communication, offering helpful alternatives, and providing timely updates, you can transform a potentially negative experience into an opportunity to strengthen customer loyalty. Remember to avoid vague language, prioritize transparency, and always put the customer's needs first.

And if you’re looking to optimize your email marketing strategy from good to great, Growth Gurus is here to help. As a results-driven email marketing agency, we specialize in creating automated, on-brand campaigns that keep your audience engaged and your revenue growing—even when stock runs low. 

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