Summary: what does conversion rate optimisation cost?
In the Netherlands, conversion rate optimisation (CRO) usually costs €1,000 to €4,000 per month with a freelancer and €2,500 to €10,000 per month with a specialist agency. A one-off CRO audit costs €749 to €1,850. In our research into the Dutch Google top 10, the monthly prices mentioned ranged from €150 to more than €25,000. What CRO delivers depends on your visitors and your margin: going from 2% to 3% conversion means 50% more leads from the same traffic. At Game-changers conversion rate optimisation is a project price, with at least 4 hours of work per month, excluding VAT.
- Freelancer: €1,000 to €4,000 per month, €75 to €150 per hour.
- Agency: €2,500 to €10,000 per month, more for large online shops.
- Audit: one-off €749 to €1,850, the middle of the market €895.
- Our advice: Start with the pages your ad budget goes to. That is where every percent delivers the most.
What is CRO (conversion rate optimisation)?
CRO stands for conversion rate optimisation: improving your website so more visitors do what you want, such as requesting a quote, booking a call or buying something. According to Ahrefs, Dutch people search 600 times a month for “wat is cro” (what is CRO) and 250 times for “wat is conversie optimalisatie”. Your conversion rate is the number of conversions divided by the number of visitors. With 1,000 visitors and 20 requests, that is 2%.
CRO is more than A/B testing. A CRO specialist researches where visitors drop off, using analytics, heatmaps and session recordings, and then improves the copy, the offer, the proof, the forms and the speed. According to Unbounce, half of all landing pages convert at less than 6.6%.
Source: Unbounce Conversion Benchmark Report, 41,000 landing pages. You will find more benchmarks and 15 checks in our landing page checklist.
What does conversion rate optimisation cost per month?
Ongoing conversion rate optimisation usually costs €1,000 to €10,000 per month in the Netherlands. The difference is in who does it and how much is tested and built. The amounts below come from the Dutch cost overviews by Searchlab (March 2026) and RankPilot (October 2026).
Check what is included in the price. With one provider you only get advice, with another you also get new pages built, the copy and the tools for testing and heatmaps. In our experience those tools together often cost an extra €50 to €500 per month.
Our research: what the top 10 for CRO costs shows
On 9 November 2026 we read the 10 pages in the Dutch Google top 10 for “wat kost conversie optimalisatie” (what does conversion optimisation cost). For each page we noted which prices are given and whether there is a worked example or client result. We do not name the pages.
- Prices say little without content: From €150 to more than €25,000 per month. Always ask how many improvements or tests you get per month, and who builds them.
- Calculating is common: Six pages work out what CRO delivers. Do the same with your own figures before you choose.
- Own prices are rare: Only four pages say what their own service costs. So always ask for a fixed price up front.
What does conversion rate optimisation deliver? A worked example
CRO delivers more customers from the same traffic, without extra ad budget. This is how you work it out, with an example of a service business:
1. Visitors and conversion now
5,000 visitors a month and 2% conversion gives 100 requests.
2. After optimisation
At 3% conversion that becomes 150 requests: 50 extra, from the same traffic.
3. What is that worth?
If 1 in 5 requests becomes a customer, with €1,000 margin per customer, that gives 10 customers and €10,000 extra margin per month.
Speed matters too. In the study Milliseconds Make Millions by Google and Deloitte, retail conversion rose by 8.4% when a mobile site became 0.1 seconds faster. And according to Baymard, on average 70% of visitors leave the shopping cart without buying.
Is CRO worth it with few visitors?
Yes, but in a different way. A reliable A/B test quickly needs thousands of visitors per variant. If you have fewer, start with improvements that almost always work: a clear headline, one offer per page, reviews and proof, a shorter form and a faster mobile page. Then measure the difference per month.
Good measurement is the foundation. Without reliable conversion data you do not know what works. Read our tracking and GA4 checklist or see data and tracking.
Our approach: conversion rate optimisation in 4 steps
1. Research
Analytics, heatmaps, session recordings and reviews show where visitors hesitate or drop off.
2. Prioritise
Every improvement gets a score on impact, evidence and effort. The biggest leaks first.
3. Build and test
New headlines, offers, proof and complete landing pages, tested with A/B tests where traffic allows.
4. Learn and continue
What works, we build on. Every round makes the next one smarter.
“For most websites the biggest gain is not in a button colour, but in the message. If a visitor does not understand within five seconds what you do and for whom, they leave. That is why we always start with the text at the top of the page, the offer and the proof.”
What conversion rate optimisation delivered for our clients
Three clients, three kinds of websites. The figures are also on our CRO (conversion rate optimisation) page.
- Straalbedrijf Zeeland: Separate landing pages per service delivered €2.1 million in qualified project value, 94% from new companies.
- Rug expertise centrum: The online shop’s conversion went from less than 2% to 8%, and profit rose by 76%.
- BodyBalancer: Landing pages per audience: 71% of leads become customers, adding €36,000 in annual recurring revenue every month.
What does conversion rate optimisation cost at Game-changers?
At Game-changers conversion rate optimisation is a project price, with at least 4 hours of work per month, excluding VAT. Combining services is cheaper than buying them separately. We often combine CRO with Google Ads or SEO: more visitors and a higher conversion rate reinforce each other. Also read what Google Ads costs, because a better landing page also lowers your cost per click.
- Free introduction: A 30-minute conversation about your website and your goals.
- Free analysis: We review your key pages, your measurement and your funnel, and you get an action plan with the biggest leaks.
- No set-up fee: You pay no one-off costs to get started. Request a free analysis.
- Senior point of contact: Always a senior partner or the founder.
- Your website and data: All pages, tests and data stay yours.
Frequently asked questions about conversion rate optimisation costs
What does conversion rate optimisation cost per month?
Usually €1,000 to €4,000 per month with a freelancer and €2,500 to €10,000 with a specialist agency in the Netherlands. In the Dutch Google top 10 we saw monthly prices from €150 to more than €25,000. The difference is in how much is researched, built and tested.
What does a CRO audit cost?
A one-off CRO audit costs €749 to €1,850, with the middle of the market around €895. You get an analysis of your pages and a list of improvements. At Game-changers the first analysis is free.
What is CRO?
CRO stands for conversion rate optimisation: improving your website so more visitors request a quote, book a call or buy. That way you get more customers from the same traffic, without extra ad budget.
What does CRO mean in marketing?
In marketing CRO means conversion rate optimisation. It is about the step after the click: what a visitor does on your site. The abbreviation CRO is also used for Chief Revenue Officer, but that is a job title.
What does a CRO specialist do?
A CRO specialist finds out where visitors drop off and improves those points. They do this with analytics, heatmaps, session recordings and A/B tests, and with better copy, offers, forms and proof.
Why conversion rate optimisation?
Because more visitors do not make a weak page better. With CRO every euro you spend on ads or SEO is worth more, because a larger share of your visitors becomes a customer.
What does conversion rate optimisation actually deliver?
Going from 2% to 3% conversion means 50% more requests from the same traffic. With 5,000 visitors a month, 1 in 5 becoming a customer and €1,000 margin, that is €10,000 extra margin per month. Work it out with your own figures.
What is a good conversion rate?
A landing page converts at 6.6% on average according to Unbounce, with 6.1% in professional services, 4.2% in e-commerce and 3.8% in SaaS. A whole website is usually lower, often between 1% and 3%.
How do you calculate your conversion rate?
Divide the number of conversions by the number of visitors and multiply by 100. With 40 requests and 2,000 visitors your conversion rate is 2%. Measure this per page and per channel, not just for your whole site.
How do you increase your conversion rate?
Start with a clear headline, one offer per page, reviews and proof, a short form and a fast mobile page. Our landing page checklist has 15 checks to start with.
How do you approach CRO with few visitors?
Start with improvements that almost always work instead of A/B tests, because a reliable test needs a lot of traffic. Then compare conversion per month, and use heatmaps and customer conversations to learn.
What is the difference between SEO, SEA and CRO?
SEO brings free visitors from Google, SEA brings paid visitors through ads and CRO makes sure those visitors become customers. They work best together: CRO makes every visitor from SEO and SEA worth more.
Is CRO just A/B testing?
No, A/B testing is only one part. CRO also includes research into your visitors, better copy and offers, faster pages and good measurement. With little traffic, testing is often not even the first step.
How long does CRO take to deliver results?
You often see the first improvements within a few weeks. An A/B test usually runs for two to four weeks. The biggest gains come from months of continuous learning and improving.
Do I need a new website for CRO?
Usually not. Many problems are solved with better copy, structure, proof, forms and speed. Sometimes a new landing page per service or audience is the fastest route, as with Straalbedrijf Zeeland.
What does conversion rate optimisation cost at Game-changers?
At Game-changers you pay a project price, with at least 4 hours of work per month, excluding VAT and with no set-up fee. Combining CRO with other services is cheaper. Request a free analysis.
Sources
Searchlab, Wat kost conversie optimalisatie in 2026? (Dutch)
17 March 2026
RankPilot, Conversie optimalisatie kosten (Dutch)
26 October 2026
Unbounce, Conversion Benchmark Report
Q4 2024, viewed 9 November 2026
web.dev, Milliseconds Make Millions (Google and Deloitte)
viewed 9 November 2026
Baymard Institute, Cart Abandonment Rate
viewed 9 November 2026
viewed 9 November 2026
Ahrefs Keywords Explorer, Dutch search volume
9 November 2026
Over de auteur
About the author
Annefleur van Osta
Online marketing strateeg bij Game-changers. Schreef dit artikel en houdt de prijzen en bronnen actueel.
Online marketing strategist at Game-changers. Wrote this article and keeps the prices and sources up to date.
