Definition
The email call to action (CTA) is the primary element that prompts the recipient to take a desired action — clicking through to a landing page, making a purchase, downloading a resource, or registering for an event. The CTA is typically styled as a button (with padding, background color, and rounded or square corners) or a text link. Button CTAs consistently outperform text links by 30 to 50 percent in click-through rate because the visual prominence creates a clear focal point.
CTA effectiveness depends on copy, placement, color, and surrounding context. Action-oriented copy that starts with a verb ("Shop Now," "Get Started," "Claim Your Discount") outperforms passive or generic copy ("Learn More" or "Click Here"). Placement above the fold (within the first 300 to 400 pixels of the email) captures recipients who do not scroll. Urgency and scarcity language ("Limited Time," "Only 10 Left") increases click-through rates by 10 to 25 percent when used authentically.
Best Practices
Write CTA copy that clearly states the benefit and uses a command verb. "Save 20% Today" outperforms "Our Sale." "Start Your Free Trial" outperforms "Learn More." Keep the copy between 2 and 5 words. Test button copy variations — the best performing CTA for a given audience often surprises the marketing team.
Place the primary CTA above the fold so it is visible without scrolling. On mobile devices, the fold is approximately 400 to 500 pixels from the top. On desktop, approximately 500 to 700 pixels. If the email requires scrolling, repeat the CTA at the bottom and consider a sticky CTA bar for interactive-capable clients.
Use a single primary CTA per email. Multiple competing CTAs reduce click-through rates by 20 to 40 percent because the recipient faces decision paralysis. If secondary actions are necessary (like "Share with a Friend" or "View in Browser"), de-emphasize them as text links with smaller font sizes away from the primary button.
Choose a CTA button color that contrasts with the email's background while remaining on-brand. Red, orange, green, and bright blue are common high-conversion button colors. Avoid gray and other low-contrast colors. Surround the button with negative space — at least 10 to 15 pixels of padding on all sides — to make it feel tappable. The recommended minimum touch target is 44px by 44px for mobile accessibility.
Related Glossary Terms
Email Animation
The use of motion in email through animated GIFs, CSS animations, and video embeds with fallback strategies.
Email Fonts
Typography in email, including web-safe fallback stacks, custom font loading, and readability considerations across devices.
Email Footer
An email footer is the bottom section of an email that contains legal requirements, unsubscribe mechanisms, and company information.
Email Landing Page
Email landing pages align post-click experience with email messaging using dedicated pages per campaign to optimise conversion rates typically between 2 and 5 per cent.
Email Mobile
Design and optimization strategies for email viewed on smartphones and tablets, where over 60 percent of all email opens occur.
Email Signature
The branded block of contact information and legal disclaimers appended to the end of an email, used in both transactional and marketing messages.
Frequently Asked Questions
Button CTAs outperform text links by 30 to 50 percent in click-through rate. However, text links are more reliable across email clients because buttons can render oddly in Outlook (broken rounded corners, missing padding). Use a button for the primary CTA and text links for secondary actions. Test both formats for your audience.
The best color is one that contrasts strongly with the email background while still fitting your brand palette. Red, orange, green, and bright blue buttons consistently perform well. Avoid low-contrast buttons (gray, pastel, white). Use a tool like Coolors or Contrast Checker to ensure a minimum contrast ratio of 4.5:1.
Ideally above the fold (visible without scrolling) and repeated at the bottom of the email for skimmers. The above-the-fold CTA captures the most engaged readers; the bottom CTA captures those who read the full content. On mobile, the CTA should appear within the first 400 pixels.
Yes, when used authentically. "Sale ends tonight" with a real deadline increases click-through rates by 15 to 25 percent. Perpetual urgency ("Last chance" every week) erodes trust and eventually depresses engagement. Reserve urgency CTAs for genuine limited-time offers.
Stick to one primary CTA per email. Multiple CTAs reduce click-through rates due to choice overload. If you must include secondary actions, present them as small text links below the primary button or in the footer. The primary CTA should command at least 80 percent of visual attention.