A CRO (conversion rate optimization) audit is a structured review of a website against the criteria that drive visitor-to-customer behavior. It identifies the specific friction points preventing interested visitors from taking the next step — and ranks fixes by expected revenue impact.

How long does a CRO audit take?

A manual CRO audit by an expert typically takes 4–20 hours. An automated CRO audit tool like BurnRate runs the same checks in about 60 seconds.

How much does a CRO audit cost?

Manual CRO audits from agencies range from $1,500 to $15,000+. Free and automated tools like BurnRate cover ~80% of what a paid audit surfaces.

What Is a CRO Audit? The Complete 2026 Guide

Q: How often should I run a CRO audit?

Run a full CRO audit any time you redesign, change positioning, or notice conversion drops. Lightweight audits every quarter catch regressions before they cost real revenue.

The short answer

A CRO audit (conversion rate optimization audit) is a structured review of your website against the criteria that determine whether visitors convert into customers. It's not a design critique. It's not a brand exercise. It's a hunt for the specific friction points costing you revenue — ranked by impact, so you know what to fix first.

A good CRO audit answers three questions:

Where are visitors dropping off?
Why are they dropping off there?
What single change would recover the most lost revenue?

Why CRO audits matter more than traffic

Doubling your conversion rate is mathematically identical to doubling your traffic — except it costs nothing per month and compounds against every channel you already run. A site converting at 1% that goes to 2% just halved its customer acquisition cost without spending another dollar on ads.

That's why most growth-stage teams audit conversion before scaling spend. Pouring traffic into a leaky funnel is the most expensive mistake in marketing.

What's actually inside a CRO audit

Every credible CRO audit covers the same ten conversion criteria. The depth varies; the categories don't.

First impression & clarity. Within 5 seconds, can a stranger tell what you do, who it's for, and what to do next?
Value proposition. Does the hero lead with the outcome the customer wants, or with the product name?
Visual hierarchy. Does the eye land on the primary CTA, or on a stock photo fighting it for attention?
CTA strength. One obvious primary action per viewport, written in the customer's words.
Trust & social proof. Logos, testimonials, ratings, usage counts — at least one above the fold, and one near every CTA.
Page structure & flow. Sections in an order that mirrors how buyers actually decide.
Content clarity. Scannable copy, benefit-led H2s, no jargon a 12-year-old wouldn't get.
Mobile experience. Tap targets, line lengths, and CTA placement on a 375px screen.
Forms & friction. Field count, inline validation, error states, password rules, CAPTCHAs.
Performance & accessibility. LCP under 2.5s, contrast ratios, keyboard navigation, alt text.

Every item gets a verdict (pass / fail / needs work), a screenshot or quote as evidence, and a specific recommended fix. Anything less is a vibe check, not an audit.

Manual CRO audit vs. AI CRO audit

Until recently, a CRO audit meant hiring a specialist for $1,500 to $15,000 and waiting two weeks. That still happens — but it's no longer the only option.

Manual audit

Best for: sites over $500K ARR, complex multi-step funnels, regulated industries.
Time: 1–3 weeks.
Cost: $1.5K–$15K+.

AI / automated audit

Best for: founders, indie SaaS, ecommerce stores, anyone who wants a prioritized fix list this afternoon.
Time: 60 seconds.
Cost: free to ~$30 per audit.

For 90% of sites under $1M ARR, the AI version surfaces the same top-priority issues a manual audit would — at zero cost and zero wait.

How to run a CRO audit yourself

If you'd rather do it by hand, we wrote a full step-by-step checklist: The CRO Audit Checklist — 23 Things to Check Before You Ship. Time-box yourself to 30 minutes per page and rank findings by expected revenue impact, not effort.

Frequently asked

How often should I run a CRO audit?

Full audit after every redesign, repositioning, or noticeable conversion drop. Lightweight quarterly check-ins catch regressions early.

What's a "good" conversion rate?

B2B SaaS: 2–5% visitor-to-trial. Ecommerce: 1.5–3% visitor-to-purchase. Lead-gen landing pages: 5–15%. Below the bottom of those bands? You almost certainly have CRO debt — and an audit will find it.

Will a CRO audit fix my conversion rate?

No — implementing the recommendations does. An audit tells you what to ship; shipping is on you. Teams that act on the top three findings within two weeks typically see 10–30% conversion lift inside a quarter.