Email Marketing KPIs: The 5 Metrics Every Digital Marketer Should Track

This post focuses on email performance KPIs and the types of reports you should use in your Marketing Automation Platform (MAP). The email KPIs discussed apply to all email marketing, regardless of the reporting platform. Any marketers who want to better gauge how their emails perform should read and bookmark this post.

Top 5 Email Metrics to Track Performance

A healthy email channel relies on digital marketers tracking the following core metrics:

1. Sent vs. Delivered Quantity: Sender Reputation
   • Answers the question: How many of my emails were successfully delivered to the intended recipient?
   • Calculation: (Number of sent/ delivered) x 100
   • Delivery Rate Benchmark: A delivery rate greater than 90% indicates a healthy list. Lower rates could indicate issues with your sender reputation.
2. Click-to-Open Rate (CTOR): Content Relevance
   • Answers the question: How compelling is the email content for those recipients who actually opened the email?
   • Calculation: This measures the percentage of unique recipients who clicked links after opening the email. Formula: (Number of Unique clicks / Number of unique opens) x 100.
   • CTOR Benchmark: A healthy deliverability range is generally between 20%-30%, though this can vary by industry.
3. Click-through Rate (CTR): Measures Engagement & Influences Email Deliverability
   • Answers the question: Is my email compelling enough to open after it’s delivered and click into the email to view the content?
   • Calculation: This measures the percentage of recipients who clicked links. Formula: (Number of Unique clicks / Delivered Emails) x 100.
   • CTR Benchmark: A healthy deliverability range is generally between 2%-6%, though this can vary by industry.
4. Unsubscribe Rate
   • Definition: The percentage of users that opt out of your emails.
   • Calculation: (Number of unsubscribed/delivered) x 100.
   • Unsubscribe Rate Benchmark: We suggest a healthy rate at or below 2%.
5. Bounce Rate
   • Definition: The percentage of emails that could not be delivered.
   • Calculation: (Bounces / Delivered) x 100.
   • Bounce Rate Benchmark: A bounce rate at or under 2% is considered healthy. Anything above that could indicate issues with list quality or sender reputation.

>>Related: How to Pick the Right B2B Email Layout for Your Offer<<

Email Metric review cadence

The short answer: Weekly and Monthly. Why? You are trying to identify patterns across the metrics listed in the previous section. Weekly allows you to keep a pulse on how your emails perform week to week. We suggest setting up an automated, weekly report that delivers to you (and your team) at the end of the week. Each Friday is a good place to start.

 I’d also recommend looking at the monthly performance. Are CTR rates steady? Are unsubscribe rates spiking? If so what email had the highest unsubscribe rate vs. the one with the lowest? Knowing these aspects of email performance will help you make small changes to see if you can improve it month to month. 

Ultimately, mastering your email channel’s performance hinges on consistently tracking these core KPIs and leveraging your Marketing Automation Platform (MAP) reporting tools. By setting up automated reports and analyzing metrics like CTOR, CTR, Bounce Rate and Unsubscribe Rate on a weekly and monthly basis, you can gain actionable insights to refine your content, improve sender reputation, and drive better engagement, ensuring your email marketing efforts achieve maximum impact.

FAQs

What email marketing KPIs should I track?

The most important email KPIs typically include open rate, click-through rate (CTR), conversion rate, bounce rate, unsubscribe rate, and revenue generated. In addition, the specific KPIs you prioritize may vary depending on your campaign goals, such as increasing engagement, driving leads, or generating revenue. The right mix depends on your campaign goals—awareness, engagement, or pipeline/revenue.

How often should I review email performance?

Campaign-level metrics should be reviewed within 24–72 hours of send. Overall program performance (trends, deliverability, engagement over time) should be reviewed monthly or quarterly to spot patterns and optimization opportunities.

What’s the difference between click-through rate and conversion rate?

Click-through rate measures how many recipients clicked a link in your email, while conversion rate tracks how many completed a desired action (e.g., form fill, purchase). CTR shows engagement; conversion rate shows impact.

Why are my open rates unreliable?

Open rates can sometimes be inflated or unreliable, especially due to privacy features like Apple Mail Privacy Protection. Therefore, it’s often better to focus on clicks, conversions, and revenue, which provide a more accurate picture of your campaign’s performance.

How do I know if my email campaign was successful?

Success should be measured against predefined goals. Compare results to benchmarks, past performance, and your campaign objective—whether that’s engagement, MQLs, pipeline contribution, or revenue.