Average Anniversary Email Benchmarks
Anniversary emails celebrate a relationship milestone — the anniversary of a customer's first purchase, subscription, or membership. Unlike birthday emails, which are ubiquitous, anniversary emails are less common and therefore stand out more in the inbox. They reinforce loyalty, prompt a renewal or repurchase, and create a reason to engage that feels personal rather than promotional.
Average open rates range from 35% to 50%, with CTR between 6% and 12%. Anniversary emails convert strongly because they arrive with genuine context: the recipient has a history with the brand, making the offer or message highly relevant. They also produce outsized lifetime value effects by reconnecting lapsed customers at a moment of positive association.
Key Findings
- Anniversary emails achieve open rates of 35-50%, outperforming most promotional broadcasts.
- CTR of 6-12% is strong for a relationship-driven message with a soft sell.
- Personalised milestones (first purchase, years as a member) lift CTR by 20-35% over generic congratulation.
- A customer-retention offer paired with the milestone increases conversion by 15-25%.
- Anniversary emails re-engage 10-20% of customers who have been inactive for 6+ months.
Open Rate Benchmarks
Anniversary emails generate open rates of 35-50%, with top performers exceeding 55%. Subject lines that name the milestone ("It's your 3-year anniversary with us") outperform generic lines by 15-25 percentage points. The email performs best when sent on or near the actual date — send-window accuracy matters. Mobile open rates run high at 65-75%, so the subject line and preview text must carry the message.
Click-Through Rate Benchmarks
Click-through rates range from 6% to 12%, with the strongest campaigns reaching 18%. Including a personalised offer — a reward, discount or loyalty bonus tied to the milestone — lifts CTR by 20-30% compared to a congratulation-only email. A single CTA focused on the celebration offer outperforms multi-CTA layouts. Retail and DTC brands tend to see higher CTRs than B2B or membership organisations, where the milestone email often serves as a touchpoint rather than a sales driver.
Best Practices
- Capture the milestone date at signup or first purchase to enable accurate anniversary sends.
- Lead with the personal milestone, not the promotion — relevance first, offer second.
- Send on the actual date; accuracy builds trust and recognition.
- Pair the milestone with a time-boxed retention offer to drive conversion.
- Use the email to reconnect lapsed customers — the anniversary is a natural re-engagement moment.
- Test congratulation-only against congratulation-plus-offer to balance brand warmth and revenue.
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Frequently Asked Questions
A birthday email celebrates the subscriber's birthday; an anniversary email celebrates the relationship with your brand — first purchase, membership start or subscription anniversary. Anniversary emails are less common and often feel more personalised.
On or near the exact milestone date. Accuracy is part of the value — a wrong date undermines the personal touch. Capture the milestone date at the moment it happens.
Yes. They arrive with genuine relationship context, making the recipient far more receptive than a cold promotional send. Open rates of 35-50% and strong re-engagement of lapsed customers are typical.