Birthday emails are one of the highest-performing, lowest-effort automations available, and a large share of programmes still never build them. Experian's widely cited Birthday and Anniversary Report found open rates for birthday campaigns over three times higher than standard bulk promotions, 56.2% against 16.8%, with transaction rates nearly five times higher.

The numbers, and why they hold up

Campaign Monitor's summary of the same research puts it plainly: birthday emails generate 342% higher revenue per email and 179% higher unique click rates than standard promotional sends. Anniversary emails perform almost as strongly, with revenue per email running nearly seven times higher than bulk mailings according to the same data set. These are not small, marginal lifts. They are some of the largest, most consistently repeated engagement gaps in email marketing research.

The reason is straightforward. A birthday or anniversary email is not competing for attention as one more promotional message. It is acknowledging something personal and true about the recipient, which is a fundamentally different kind of email than a generic sale announcement, even before any discount is involved.

A simple flow that works

• Collect the date. Ask for birthdate at signup or during onboarding, framed as something that unlocks a genuine perk rather than a data grab.
• Send close to the actual day. Campaign Monitor's data found 55% of birthday emails are timed to the subscriber's exact birthday, which performs better than a vague 'birthday month' approach.
• Lead with acknowledgement, not the offer. Open with something that reads as genuinely about the person, then introduce any gift or discount second.
• Consider a reminder. Experian data cited by Elixirr Digital found reminder emails, sent a few days after the initial birthday email to anyone who has not engaged, lift open rate, click rate, and revenue per email by roughly 20% over the single-send approach.

Where anniversary emails fit differently

An anniversary email marks the relationship itself, typically the signup date or first purchase date, rather than a personal date like a birthday. It is a natural moment to reflect the relationship back to the subscriber: what they have bought, how long they have been a customer, or what has changed since they joined, which makes it a genuinely different kind of email than a birthday send even though the automation logic behind both is similar.

Is it worth the build effort

For most programmes with any meaningful list size, yes. It requires collecting one additional data field and setting up a single date-triggered automation, a comparatively small build for a flow that Digital Silk's 2025 data separately confirms outperforms standard newsletter sends by a wide margin across ecommerce and business audiences alike.

Frequently asked questions

Do I need a discount for a birthday email to work?

No, though many brands include one. The acknowledgement itself is doing a meaningful share of the engagement lift, not just the offer, so a genuine, well-written email without a discount can still outperform a standard promotional send.

How do I collect birthdate data if I do not already have it?

Ask at signup, in a post-purchase survey, or through a dedicated 'complete your profile' prompt framed around unlocking a birthday perk, rather than presenting it as a generic data request.

Should the birthday email send on the exact day or the week of?

The exact day performs best according to available data, though a short window around it is a reasonable fallback if exact-day automation is not yet set up.

What is the difference between a birthday and anniversary automation?

A birthday email marks a personal date. An anniversary email marks the customer relationship itself, typically signup or first purchase date, and tends to work best when it reflects the relationship's history back to the subscriber.

Mail Blaze is an email marketing platform specialising in email engagement, with automations built to trigger on any date field you collect, including birthdays and account anniversaries.

Explore how to set up a date-triggered automation in Mail Blaze if you have not built one yet.

P.S. If you already collect birthdates but have never turned them into an automation, that is a genuinely quick win. Happy to help you set it up.