Example: If 10,000 emails were delivered and 25 people unsubscribed, the unsubscribe rate is 0.25%.
Why Unsubscribe Rate matters
It is an early warning on list health and relevance. A rising unsubscribe rate usually means your emails are too frequent, off-topic or going to the wrong people.
Some unsubscribes are healthy, because they remove people who would never buy. The problem is a sudden jump, which can also lead to spam complaints and weaker delivery for the rest of your list.
How to read it
Unsubscribe rates are usually small, and what is normal depends on your industry and how often you send. Compare each campaign with your own average and look for outliers.
Tools differ slightly in how they calculate it, for example by dividing by emails sent or by emails delivered, so compare numbers from the same tool.
How to improve it
- Segment your list so people get content that fits their interests.
- Set clear expectations at signup about what and how often you will send.
- Reduce frequency if unsubscribes rise after busy sending periods.
- Offer a preference page so people can choose fewer emails instead of leaving entirely.
- Remove inactive contacts rather than continuing to send to them.
Common mistakes
- Treating every unsubscribe as a failure.
- Hiding the unsubscribe link, which pushes people to mark you as spam instead.
- Comparing the rate between tools that calculate it differently.
- Looking only at one campaign instead of the trend over time.
“Which email campaigns had the highest unsubscribe rate in the last 90 days, and what did they have in common?”
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