Reviewed by the SEOPointz team · Last reviewed June 2026. The click-rate figures quoted in CTA advice come from vendor case studies and vary widely, so we’ve framed them as directional rather than guaranteed and focused on tactics that hold up across our own testing. SEOPointz may earn a commission from some links; it never changes what we recommend.
The call-to-action button is the one part of an email that exists to be clicked, and yet it’s usually the last thing anyone designs. People spend an afternoon on the subject line, drop in a grey “Submit” button at the end, and wonder why the campaign underperformed. A good CTA isn’t about a magic button colour — it’s about giving one clear next step that’s easy to see, easy to tap, and obviously worth the click. Here’s how to build one that actually earns the click.
Make it a button, not a buried link
A text link asks readers to notice it; a button announces itself. Multiple vendor tests have found that styling a CTA as a real button rather than an inline link lifts click-through — the reported gains range from the high twenties to over 100 percent depending on the audience, so treat the exact number with suspicion but the direction as reliable. The mechanism is simple: a button reads as something to do, while a link reads as something to read past. Give it padding, a solid fill, and enough contrast against the background that it survives a quick skim on a phone screen.
One ask per email
The single biggest mistake is offering five things at once: read the blog, follow us, shop the sale, book a call, and reply. Every extra option dilutes the one you actually care about. The widely cited finding that emails with a single CTA dramatically outperform multi-CTA emails is exactly the kind of stat that gets repeated without context — but the underlying logic is sound and matches what we see. Decide the one action this email should drive, build the whole message toward it, and demote everything else to a quiet text link in the footer if it must exist at all.
Write the button copy as a verb, not a label
“Submit,” “Click here,” and “Learn more” tell the reader nothing about what happens next. Strong CTA copy starts with a verb and names the payoff: “Get my free template,” “Start the 14-day trial,” “Claim my discount.” First-person phrasing (“my” instead of “your”) often tests well because it frames the click from the reader’s side. Keep it to a few words — a button is not the place for a sentence — and make the verb match the destination so the click feels honest rather than baited.
Design for the thumb and for dark mode
The majority of marketing emails are now opened on phones, so a CTA that looks fine on a laptop can be a fiddly target in real life. Make the tappable area generous — aim for a button at least around 44 pixels tall so it’s comfortable for a thumb — and leave breathing room around it so nearby links aren’t hit by accident. The trap that catches most senders in 2026 is dark mode: many email clients invert colours, and a button built as coloured text on a transparent background can vanish entirely against a dark backdrop. Use a bordered, filled button with explicit colours, and always send yourself a test in dark mode before launch.
Placement: above the fold isn’t a rule
Conventional wisdom says put the CTA at the top, but it depends on the ask. A low-commitment action (“Read the article”) can sit high because the reader needs little convincing. A higher-commitment action (“Book a demo,” “Buy now”) usually performs better after you’ve made the case, so it belongs further down — and in a longer email, repeating the same button once at the top and once at the bottom catches both the skimmer and the reader who needed persuading. There’s no universal winner here, which is exactly why it’s worth testing.
Test the variables that actually move the needle
It’s tempting to A/B test button colour forever, but colour is rarely the deciding factor. The variables that genuinely shift results are the size of the ask (a free download converts far better than “buy now”), whether the button renders correctly in dark mode, and the quality of your list — the most engaged readers click almost anything reasonable, and a disengaged list won’t click the prettiest button on earth. Test those first. Colour and corner-radius can come later, once the fundamentals are right.
Frequently asked questions
What colour should my CTA button be?
There’s no universally best colour. What matters is contrast — the button should stand out clearly from everything around it — and that it renders correctly in dark mode. A high-contrast button in your brand palette beats chasing a “magic” colour.
Can I have more than one CTA in an email?
You can, but lead with one primary action and make it visually dominant. If secondary links exist, demote them to plain text so they don’t compete with the main button for attention.
How big should the button be on mobile?
Big enough to tap comfortably — roughly 44 pixels tall is a common minimum — with clear spacing around it so readers don’t mis-tap a neighbouring link.
A great button is only as good as the email around it, so pair this with our guides on designing emails that convert and building effective email marketing strategies.
