Average Back-in-Stock Notification Email Benchmarks
Back-in-stock notification emails alert customers when previously out-of-stock products become available again. These emails target customers who have explicitly expressed interest in a product by joining a waiting list or requesting a restock alert. The combination of demonstrated purchase intent and product scarcity makes back-in-stock emails among the highest-converting automated email campaigns in e-commerce.
| Metric | Average | Above Average | Excellent |
|---|---|---|---|
| Open Rate | 30-50% | 52%+ | 60%+ |
| Click-Through Rate | 15-35% | 38%+ | 50%+ |
| Click-to-Open Rate | 40-65% | 68%+ | 78%+ |
| Conversion Rate (Purchase) | 10-25% | 28%+ | 40%+ |
| Bounce Rate | 0.3-0.8% | Below 0.2% | Below 0.1% |
| Unsubscribe Rate | 0.08% | Below 0.04% | Below 0.02% |
| Spam Complaint Rate | 0.015% | Below 0.008% | Below 0.004% |
Key Findings
- Back-in-stock emails achieve conversion rates of 10-25%, making them among the highest-converting email types in e-commerce.
- Emails sent within 1 hour of stock arriving convert at 2x the rate of emails sent 24+ hours after restock.
- Exclusive early access for waiting list subscribers (notify before public restock announcement) increases conversion by 25-35%.
- Limited-stock messaging alongside the restock alert ("Only 20 available") creates urgency and increases conversion by 15-25%.
- Multi-product back-in-stock digests (notifying customers of multiple restocked items they requested) achieve 20-30% higher CTR than single-product notifications.
Open Rate Benchmarks
Back-in-stock notification emails achieve open rates of 30-50%. Restock alert emails for high-demand products achieve 40-50%. General restock notifications (for lower-demand items) achieve 30-40%. Exclusive early-access restock emails achieve 45-55%. Subject lines that name the specific product and use "Back in Stock" outperform generic restock subject lines by 30-40%.
Click-Through Rate Benchmarks
CTR for back-in-stock emails averages 15-35%. Product page CTAs achieve 15-25% CTR. "Shop Now" and "Buy Now" buttons achieve 12-20%. Add-to-cart direct links achieve 10-18%. Related product recommendations in the email achieve 3-6% CTR. The most effective CTAs include "Shop Now", "Buy [Product Name]", "Get It Before It Sells Out", and "Add to Cart".
Best Practices
- Notify immediately on restock: Automate back-in-stock notifications to send within minutes of inventory being updated. Speed is the strongest predictor of conversion for restock emails.
- Offer exclusive early access: Notify waiting list subscribers 24-48 hours before the public restock announcement. Early access creates exclusivity and increases conversion by 25-35%.
- Create urgency with limited stock messaging: If the restocked quantity is limited, include stock count messaging. "Only 15 available" creates urgency that increases conversion by 15-25%.
- Segment by waitlist duration: Customers who waited longer are more likely to purchase. Customers on waitlists for 30+ days convert at 20-30% higher rates than those on shorter waitlists.
- Include alternative recommendations: If the product sells out again quickly, include similar alternatives. This recovers 10-15% of revenue from customers who missed the restock.
- Send a sold-out follow-up: If the restocked inventory sells out again within 48 hours, send a "sold out again" email with restock ETA and alternatives. This maintains customer interest and manages expectations.
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Frequently Asked Questions
The average open rate for back-in-stock notification emails is 30-50%. High-demand product alerts achieve 40-50%, exclusive early access alerts achieve 45-55%, and general restock notifications achieve 30-40%.
A good CTR for back-in-stock emails is 15-35%. Product page CTAs achieve 15-25% CTR, and direct add-to-cart links achieve 10-18%. Conversion rates range from 10-25%.
Within minutes of inventory being updated. Every hour of delay reduces conversion probability. Emails sent within 1 hour of restock convert at 2x the rate of emails sent after 24 hours.
Yes, offering 24-48 hours of exclusive early access to waiting list subscribers increases conversion by 25-35% and rewards customers for their patience.
By sending immediate notifications, offering early access, creating urgency with stock limits, including alternative product recommendations for quick sell-outs, and following up if the restock sells out again.