What a CRO audit actually costs in 2026

A conversion audit costs between three and eight thousand dollars. An ongoing retainer starts around two and a half thousand a month. Below roughly 10,000 monthly visitors, neither one pays back.

That last sentence is the one nobody in this industry writes down.

Pricing pages in CRO are vague on purpose. You get "custom" and a discovery call, and by the end you still cannot answer the question you came with: is this worth it for a business my size? Here are the numbers, and the maths for whether they apply to you.

What does a CRO audit cost?

A one-off conversion audit runs $3,000 to $8,000 for a standard engagement, rising to $25,000 for deep analysis across a large site. Hourly consultants charge $100 to $400, with senior specialists reaching $1,500. Ongoing agency retainers commonly start at $2,500 a month and run to $30,000 or more.

The spread inside each band tracks traffic volume and funnel complexity more than quality.

Figures from ClicksGeek's 2026 agency pricing survey and SEOLevelUp's 2026 pricing guide, which agree closely despite being independent of each other.

Where the money actually goes

Most of a CRO invoice buys senior time, not tooling. A typical audit is 20 to 40 hours of an experienced person reading your analytics, walking your funnel, and writing up what they find. At $150 to $300 an hour that arithmetic produces the $3,000 to $8,000 band almost exactly.

Which explains two things. The price does not drop much for a small site, because the hours are similar whether you do sixty sales a month or six thousand. And agencies push retainers because a one-off audit is a fixed pile of hours, while a retainer is recurring revenue against roughly the same work.

You are not paying for the finding. You are paying for the hours it took someone to notice it.

What the four options actually cost you

Four ways to get diagnosed, by first-year cost at small-business scale.

An agency buys a testing programme and someone accountable for the number. A consultant audit buys a senior opinion, once. A freelancer buys variable quality at a price you can absorb. Tooling buys breadth and speed, and no judgement about your business.

Those are not the same product. They are four purchases that share a category name.

If you want the fast version of the diagnosis, Revslip audits your URL free and ranks what it finds by monthly cost.

How do you tell whether any of it pays back?

Work out what a one point conversion improvement is worth to you per month, then compare it to the monthly cost. If a realistic improvement does not clear the fee inside six months, the engagement does not pay back. For most businesses under 10,000 monthly visitors, it does not.

Here is the formula, the same one Revslip publishes for its own estimates:

monthly visitors × conversion gap × average order value = monthly recovery

Run it with your numbers. At 4,000 visitors, 1.2% converting, 2% reachable, €60 average order: the 0.8 point gap is 32 extra orders, or €1,920 a month. A $5,000 audit pays back in under three months. Clear yes.

Now run it at 800 visitors with a €40 order. The same gap is six orders, €256 a month. That audit takes twenty months to pay back, assuming you ship everything and it all works.

Not sure which band you are in? Run a free audit first and see what your site is losing before you price anything.

Why almost nobody publishes this threshold

An agency that tells a 900-visitor business the retainer will not pay back has just talked itself out of a sale. So the threshold does not appear on pricing pages, and the discovery call optimises for closing rather than for whether you should buy.

Not a conspiracy, just ordinary commercial incentive. It is why the honest answer has to come from someone who does not need you to sign a retainer.

Worth stating our own bias too. Revslip sells automated audits, so we have an obvious interest in you concluding that a human engagement is expensive. Check the numbers above against the two linked pricing surveys rather than taking ours.

What to do at each size

1. Under 1,000 visitors a month. Do not buy CRO at any price. Your problem is traffic or product, not conversion, and you cannot detect a conversion change at this volume anyway.
2. 1,000 to 10,000 visitors. Diagnose cheaply, fix yourself. Tooling, a freelancer for specific work, or your own afternoon. A $5,000 audit rarely clears the bar here.
3. 10,000 to 100,000 visitors. A one-off senior audit starts making sense, especially before a redesign. Retainers become arguable near the top of this range.
4. Above 100,000 visitors. A retainer and a real testing programme is usually right. At this volume a tenth of a point is material and you can measure it.

How to judge a proposal before you sign

Ask three questions and watch what happens. Any decent practitioner answers all three without flinching, and the answers tell you more than the price does.

1. What will you deliver, and in what format? A ranked list with reasoning is worth paying for. A slide deck of observations is not. Ask to see a redacted example first.
2. How will we know it worked? If they cannot name the metric, the timeframe and the sample size needed, they are selling activity rather than outcomes.
3. At my traffic, what can you realistically detect? The honest answer at small scale is "not much, statistically." Anyone promising significance on 800 visitors a month is either confused or hoping you are.

When paying the full price is obviously right

Three cases justify a senior engagement regardless of the payback maths. High average order value, where one recovered sale covers a chunk of the fee. Complex funnels with several steps and real segmentation. And situations where internal politics matter, because an outside expert can say the thing nobody inside can.

That last one never appears on an invoice. Sometimes you are not buying analysis. You are buying someone with the standing to tell a founder their homepage is unclear.

Common questions

Is a free CRO audit worth anything?

Sometimes, but check what it inspects. Many free audits are lead magnets that run a speed test and a checklist, then route you to a sales call. The useful ones tell you something specific about your site you did not already know. Judge them on whether the output is actionable without a follow-up call.

How long does a CRO audit take?

A human audit typically takes one to three weeks from kickoff to report, covering 20 to 40 hours of work. Automated audits return in minutes but cover breadth rather than judgement. The lag matters if you are deciding on a deadline, such as signing off a redesign.

Should I pay for an audit before a redesign?

Usually yes, and it is the highest-value moment to buy one. A redesign changes everything at once, which destroys your ability to attribute the result. Going in with a documented list of known problems turns a hopeful rebuild into a targeted one. The redesign or fix decision covers how to tell which you need.

Do agencies guarantee results?

Most do not, and the ones that do usually guarantee activity rather than outcome, such as a number of tests per quarter. That is reasonable. Conversion depends on your product, price and traffic quality, none of which an agency controls. Treat a guaranteed lift percentage as a warning sign.

Do I need an audit at all?

Not always, and it is worth ruling out the obvious first. Most sites with traffic but no sales have one dominant cause you can find yourself in about twenty minutes by splitting your analytics three ways.

Revslip's automated audit sits at the tooling end of that range, free to run, with every finding priced using the formula above.