How Much Does CRO Cost in New Zealand?

There are four pricing models you will run into in New Zealand and Australia, and most agencies use one or two of them.

Monthly retainer

This is the most common model for ongoing CRO, and it is the one we use. You pay a fixed monthly fee, and the agency runs a continuous loop of research, test design, build, and analysis. A retainer suits stores that want compounding gains rather than a single fix, because the value of CRO comes from a steady cadence of tests, not a one-time push. The fee scales with how many tests you run and how much development and tracking work is bundled in.

Per-project audit

A per-project audit is a fixed-fee, one-off piece of work. You get a structured review of your store, a prioritised list of issues, and recommendations, usually inside a week or two. This is the lowest-commitment way to start, and it is how we open most engagements with a free conversion audit before anyone commits to ongoing work. A paid, in-depth audit goes deeper, but the principle is the same: diagnosis first, then decide whether to implement in-house or with help.

Hourly

Some consultants and smaller agencies bill by the hour, which works for defined tasks like building a single test, fixing a checkout step, or a tracking repair. Hourly is transparent for small scopes but gets unpredictable for an open-ended programme, which is why ongoing CRO usually settles into a retainer instead.

Performance or revenue-share

A few providers tie their fee to a percentage of the revenue lift they claim to generate. It sounds appealing because it feels risk-free, but it is hard to attribute cleanly, it incentivises short-term wins over durable ones, and reputable sources advise against it. Invesp's pricing guide explicitly recommends against performance-based CRO pricing (Invesp, 2025). We do not work this way, and we would treat a revenue-share pitch with caution.

Solid NZ-specific CRO pricing data is thin, so the figures below lean on global and Australian published ranges, with NZ agency rates where we could find them. Treat them as orientation, not quotes.

Monthly retainers. WebFX puts agency CRO services at "between $800 and $10,000 per month" (WebFX, 2025). Invesp breaks this down by tier: lower-tier agencies around US$2,000 to US$5,000 a month, smaller specialist agencies US$5,000 to US$8,000, and top-tier firms starting near US$10,000 a month, often with a six-month minimum (Invesp, 2025). Tenet's 2026 guide cites a broad overall band of roughly US$1,500 to US$31,000 a month depending on platform, store size, traffic, and test volume (Tenet, 2026). The spread is enormous because the top of it describes enterprise testing programmes, not a typical NZ Shopify or WooCommerce store.

Standalone audits. A one-off CRO audit commonly lands in the low four figures. One published example referenced in our research priced a one-week audit at around US$1,540 (Tenet, 2026).

Hourly and NZ agency rates. Independent consultants are cited at US$250 to US$300 an hour at the top end (Invesp, 2025). For local context on agency time, NZ web and digital agency rates run roughly NZ$100 to NZ$200 an hour, with Auckland agencies sitting at the upper end of that range and Christchurch lower (Naveck Technologies, 2026).

An NZ-specific signal. In our research one NZ provider published an entry point around NZ$3,500 a month aimed at service and ecommerce businesses turning over more than NZ$750k a year, which is a useful real-world reference for where local ongoing CRO can start.

We do not publish a flat rate here because the right number depends on your store. We work on a retainer model and start with a free audit, then quote against your actual scope rather than a list price.

Four things move a CRO quote more than anything else.

Store size and complexity. More products, more templates, and more checkout variations mean more surface area to research, test, and maintain. A 20-product store and a 2,000-SKU catalogue are not the same job.

Traffic volume. CRO needs enough traffic to reach statistical significance on a test in a reasonable time. Lower-traffic stores run fewer concurrent tests and longer cycles, which usually means a smaller programme. Higher-traffic stores can run a faster, larger programme, which costs more but also returns results sooner.

Test velocity. This is the biggest lever. One test a month is a modest retainer. A structured programme running several tests in parallel, with the design, development, and analysis that requires, sits at the higher end.

How much build and tracking is included. Some retainers are recommendations only. Others include the development to ship each test and the analytics work to measure it honestly. The latter costs more but is usually what actually moves revenue, because a recommendation nobody builds changes nothing.

CRO should be judged on return, not on the invoice. The question is not "what does it cost" in isolation, it is "what is a one or two percentage point lift in conversion worth on my current traffic and order value." On a store doing meaningful volume, a small percentage lift can return the retainer many times over, because you are converting traffic you already paid to acquire.

We have seen what disciplined optimisation does in practice: a 124% conversion lift heading into a Black Friday period, and a page load time cut from 11.3 seconds to 1.9 seconds, which on its own removes a large source of lost sales. Those are first-party results, not a promise, and the point is that the upside comes from compounding small, measured gains, which is exactly why an ongoing programme tends to beat a single fix.

If your store does not yet have the traffic or the clean tracking to test reliably, the honest answer is that a heavy CRO retainer is premature. That is worth knowing before you spend, and it is one of the things a proper audit surfaces.

A few signals separate genuine CRO from packaging.

Anyone guaranteeing a specific result. No one can honestly guarantee "we will lift your conversion rate by 30%." CRO is a process of testing hypotheses, and a meaningful share of tests are flat or lose. A guaranteed number is a sales tactic, not a method.

A cheap "audit" that is a generic checklist. A real audit is grounded in your analytics, your session data, and your actual funnel. A templated checklist that could apply to any store is close to worthless, and a suspiciously cheap audit is often exactly that. The value is in the specificity.

Recommendations with no path to implementation. An audit that lists fixes but cannot build, ship, or measure them leaves you with homework, not results. Clarify up front who does the building and the tracking.

No measurement of what they ship. If a provider cannot tell you how they will measure whether a change worked, they are guessing. Honest CRO depends on clean analytics, which is why tracking accuracy matters as much as the test itself. Across the work we do we maintain 98% tracking accuracy precisely because a programme is only as trustworthy as its measurement.

If you want a sense of where your store stands before committing to any of this, start with a free conversion audit, or talk to us about an ecommerce CRO retainer scoped to your store.