Email click-through rate

Email click-through rate (email CTR) is the percentage of delivered emails where the recipient clicks on one or more links. It is the most reliable engagement metric in email marketing because, unlike open rate, it cannot be inflated by privacy features like Apple Mail Privacy Protection.

Email CTR measures the quality of the entire email experience: subject line, preview text, body copy, visual design, link placement, and call-to-action. A recipient must open the email, read the content, find the CTA compelling, and click. Each stage is a potential drop-off point, which makes CTR a demanding but honest measure of email effectiveness.

There are two variants of email CTR. The standard CTR, calculated against total delivered emails, tells you what percentage of your audience engaged deeply. The click-to-open rate (CTOR), calculated against opened emails only, isolates the effectiveness of the email body content by removing the subject line's influence. Both are useful, but they answer different questions. Standard CTR reflects overall email programme performance. CTOR tells you whether the email content itself is working, independent of whether the subject line got people to open.

As privacy changes continue to make open rate less reliable, email CTR is increasingly becoming the primary engagement metric for email marketers. It is unaffected by tracking pixel pre-loading and represents genuine user intent to engage with your content.

Divide the number of unique recipients who clicked at least one link by the number of emails delivered, then multiply by 100. Using unique clicks rather than total clicks avoids inflating the metric when a single recipient clicks the same link multiple times.

For click-to-open rate (CTOR), divide unique clicks by unique opens instead. This isolates the email content's effectiveness from the subject line's effectiveness, though CTOR is less reliable now that open tracking is affected by privacy features.

When measuring email CTR, exclude clicks on the unsubscribe link. These are a form of engagement but not the kind you are trying to maximise. Most email platforms handle this automatically, but it is worth verifying.

For emails with multiple links, track both the overall CTR and the click rate per link. This reveals which links, offers, or content sections are most compelling to your audience and helps you optimise placement and messaging for future campaigns.

Email CTR sits between opens and conversions in the email marketing funnel. It determines how much traffic emails drive to your site and how many recipients move deeper into the funnel.

The tree shows that email CTR is driven by email copy quality, CTA design and placement, content relevance, and personalisation depth. Improving any of these increases the number of recipients who click through to your site.

The tree also reveals an important diagnostic pattern. If open rate is strong but CTR is weak, the problem is inside the email: the body content or CTA is not compelling enough. If both open rate and CTR are weak, the problem may be upstream in list quality or segmentation. If CTR is strong but landing page conversion rate is weak, the email is doing its job but the landing page is failing to deliver on the email promise.

1. 1

   Use a single, clear call-to-action

   Emails with one prominent CTA consistently outperform emails with multiple competing links. If you must include multiple links, establish a clear visual hierarchy so the primary CTA dominates and secondary links are obviously secondary.

2. 2

   Write benefit-driven CTA copy

   Replace generic button text like "Click here" or "Learn more" with specific, benefit-oriented copy. "Download the 2026 benchmark report" tells the reader exactly what they will get and why it is worth clicking.

3. 3

   Personalise content based on behaviour and segment

   Dynamic content blocks that change based on the recipient's past behaviour, purchase history, or segment deliver higher relevance and higher CTR. A user who browsed running shoes should see running shoe recommendations, not a generic product grid.

4. 4

   Optimise email design for scanning

   Most email readers scan rather than read. Use short paragraphs, clear headings, bullet points, and visual breaks. Place the primary CTA above the fold and repeat it at the bottom for long emails.

5. 5

   Send triggered emails based on user behaviour

   Abandoned cart emails, post-purchase follow-ups, and onboarding sequences are triggered by specific user actions and are inherently more relevant than batch campaigns. Build a library of triggered emails to capture high-intent moments.

6. 6

   A/B test email body content systematically

   Test one element at a time: CTA button colour, copy length, image placement, personalisation tokens, or content layout. Accumulate learnings across tests to build a data-driven email design playbook.