Why visitors don't convert: 9 UX causes

You're getting the clicks. You're just not getting the customers. Analytics tells you where people leave, but not why.

The good news is that the reasons repeat across sites. Large datasets from Unbounce (41,000+ landing pages), Contentsquare (99 billion sessions) and Baymard Institute's checkout research point to the same small set of problems. This post lists nine of them, the evidence behind each, and what to check on your own page.

The evidence at a glance

What counts as a good conversion rate?

Unbounce's Conversion Benchmark Report analysed over 41,000 landing pages, 464 million visitors and 57 million conversions. The median conversion rate across all industries was 6.6%, and industry medians ranged from 3.8% to 12.3% (Unbounce, 2024).

Conversion is also getting harder. Contentsquare's 2026 benchmark, covering 99 billion sessions on 6,500+ sites, found conversion rates fell 5.1% between Q4 2024 and Q4 2025 (Contentsquare, 2026).

If your page sits below your industry's median, one or more of the causes below is usually the reason.

The 9 UX causes

1. Your copy is too hard to read

This is the single strongest finding in Unbounce's data. Pages written at a 5th–7th grade reading level converted at 11.1%, 56% higher than pages at an 8th–9th grade level. Professional-level writing converted at just 5.3%. Difficult words (three or more syllables) had a −24.3% correlation with conversion rate, and that link has grown 62% stronger since 2020 (Unbounce, 2024).

Financial services was the one industry where more complex language helped.

Check: Run your headline and first paragraph through a free readability checker. Replace jargon with the words your customers use.

2. You're using too many words

Length hurts too. In the same dataset, word count had a −18.6% correlation with conversion rate, and reading time −19.4% (Unbounce, 2024). Every extra paragraph is another chance for a visitor to lose the thread before they reach your call to action.

Check: Can a visitor understand what you offer, who it's for and what to do next within the first screen?

3. Your mobile experience is weaker than desktop

Mobile now accounts for 83% of landing page visits, nearly five times more than desktop, yet desktop still converts 8% better. Unbounce estimates mobile optimisation could have produced over 1.3 million more conversions across its dataset (Unbounce, 2024).

Performance is part of the gap. Only 62% of mobile sites load their main content within 2.5 seconds, against 74% on desktop. Only 45% of mobile home pages pass all Core Web Vitals (HTTP Archive, 2025).

Check: Open your page on a phone. Is the main button reachable with your thumb? Does anything cover it? Do tap targets meet WCAG 2.5.8's 24×24px minimum?

4. The page loads too slowly

Slow pages are improving but still common. In Contentsquare's 2026 data, slow page loads affected 10.9% of sessions, down 20% year on year (Contentsquare, 2026). On mobile, the median page spends 1,916 milliseconds with its main thread blocked, up 58% from 2024 (HTTP Archive, 2025).

Check: Test the page with Google PageSpeed Insights. Look first at your hero image, fonts and third-party scripts.

5. Things break when people try to use them

Frustration is widespread. 35.2% of sessions showed signs of frustration in Contentsquare's 2026 benchmark. API errors, where something fails behind the scenes, rose 16% year on year, and rage clicks rose 1.5% (Contentsquare, 2026).

These problems are invisible in a screenshot or design file. A form that won't submit, a filter that doesn't respond, or a button that does nothing only shows up when someone uses the page.

Check: Click every button and submit every form on your key pages, on both desktop and mobile.

6. Costs appear too late

For ecommerce, surprise costs are the biggest single reason shoppers leave. In Baymard's research, 40% abandoned checkout because of extra costs such as shipping, taxes or fees (Baymard). The same applies to SaaS pricing that hides the real cost until the last step.

Check: Show the full price, including shipping or required add-ons, before the final step.

7. You force people to create an account

18% of shoppers in Baymard's research dropped out when forced to create an account (Baymard). For SaaS, the equivalent is a long sign-up form before anyone sees the product.

Check: Offer guest checkout, or let people try the product before asking for details.

8. Your forms are too long or confusing

17% abandoned because the checkout process felt too long or complicated (Baymard). Labelling makes it worse: 53% of desktop and 55% of mobile form inputs rely only on placeholder text for their label, which disappears as soon as someone starts typing (HTTP Archive, 2025).

Check: Remove every field you don't strictly need. Give every field a visible label.

9. Accessibility barriers block real customers

Accessibility problems are conversion problems. The WebAIM Million 2026 found detectable WCAG failures on 95.9% of the top million home pages. Low-contrast text appeared on 83.9% of pages and missing form labels on 51% (WebAIM, 2026). If someone can't read your button or understand your form, they can't convert.

Check: Test colour contrast, form labels and keyboard navigation on your key pages.

Which cause should you fix first?

Start with the problems that are both common and cheap to fix, then work towards the bigger changes.

The effort ratings are general guidance, not measured figures. Your own audit will tell you which causes actually apply to your page.

How ProCurveUX helps

ProCurveUX checks a live page for most of these causes in about a minute:

• Readability, CTA prominence and visual hierarchy on the rendered page.
• Mobile problems at a real 390px width, including tap targets and sticky elements that cover the main action.
• Speed and stability, measured as Core Web Vitals while the page loads.
• Form and accessibility issues such as missing labels, low contrast and keyboard traps.
• Fixes ranked by your goal, so a sign-up page and a checkout page get different priorities.

Some causes need a person. Pricing decisions, copy tone and multi-step flows are flagged for your review rather than guessed at.

Key takeaways

• The median landing page converts at 6.6%, and conversion rates fell 5.1% year on year (Unbounce; Contentsquare).
• Simple copy wins: 5th–7th grade reading level pages converted at 11.1% vs 5.3% for professional-level writing.
• 83% of landing page visits are on mobile, yet desktop still converts 8% better.
• 35.2% of sessions show frustration, and API errors rose 16% year on year.
• In ecommerce, extra costs (40%), forced accounts (18%) and complicated checkouts (17%) drive abandonment (Baymard).
• 95.9% of home pages have detectable accessibility failures, and each one can block a customer.

Frequently asked questions