The verdict in three sentences
A B2B website redesign costing 32,000 EUR lifted an Amsterdam industrial mid-cap's conversion rate from 1.1 % to 2.9 % and doubled qualified leads. Cost per lead dropped 40 % and the return on investment landed in 9 months. On an already-visited site, the issue was not traffic but conversion: every conversion point gained is immediate money.
The context and the quantified problem
Before the redesign, the site looked fine but converted poorly: confusing navigation, thin product pages, overlong forms, high load time and no serious mobile optimization.
| Indicator (before) | 2025 value |
|---|---|
| Visitors/month | 9,500 |
| Conversion rate (quote request) | 1.1 % |
| Leads/month | 105 |
| Share of qualified leads | 32 % |
| Cost per lead (Ads + SEO) | 68 EUR |
| Load time (LCP) | 4.8 s |
| Average signed deal | 18,000 EUR |
With 9,500 monthly visitors, every tenth of a conversion point gained represents about 10 extra quote requests per month: the reservoir was huge at constant traffic.
The investment and the gain, line by line
The redesign covered information architecture, new design, enriched product pages, short multi-step forms, Core Web Vitals optimization and analytics tracking.
| Line item | 2026 amount (EUR) |
|---|---|
| Audit, UX and site structure | 5,000 |
| Design and integration | 12,000 |
| Development and CMS | 9,000 |
| Technical SEO and performance | 4,000 |
| Tracking and initial A/B testing | 2,000 |
| Total investment | 32,000 |
| Annual maintenance | 4,800 |
| Gain after 6 months | 2026 value |
| Conversion rate | 2.9 % (+164 %) |
| Leads/month | 276 (about +120 %) |
| Share of qualified leads | 47 % (+15 pts) |
| Cost per lead | 41 EUR (-40 %) |
| Load time (LCP) | 1.9 s |
| Extra signed deals/month | +4 |
With an average deal of 18,000 EUR and a stable close rate, 4 extra deals per month represent roughly 72,000 EUR of additional monthly revenue (2026 order of magnitude). Even at 15 % margin, the extra annual margin funds the redesign several times over.
Mini case study
Sarah, marketing director of the Amsterdam mid-cap, makes the call. Investment 32,000 EUR, maintenance 4,800 EUR/year. Cost per lead falls from 68 to 41 EUR: on 276 monthly leads, acquisition savings alone reach about 7,400 EUR/month versus the old cost applied to the new volume. Adding the margin on extra deals, cumulative gains exceed the investment by month 9. Over 24 months, cumulative ROI exceeds 400 %, driven mostly by conversion, not by a bigger media budget.
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FAQ
How much does a conversion-focused B2B redesign cost in 2026?
Between 20,000 and 45,000 EUR depending on page count and optimization depth. This mid-cap invested 32,000 EUR for a full conversion-focused redesign.
Why does conversion matter more than traffic?
At constant traffic, moving from 1.1 % to 2.9 % nearly doubles leads without spending an extra euro on media. It is the most profitable short-term lever.
Does technical performance really matter?
Yes: cutting LCP from 4.8 s to 1.9 s reduces bounce and improves SEO, contributing to the rise in qualified leads.
How fast do results appear?
Conversion gains show within the first weeks; full ROI here is reached in 9 months.
Do we need to increase the ad budget?
No. Here cost per lead fell 40 %: the redesign makes the existing budget more productive rather than demanding more.
Let's scope your project. B2B redesign, conversion optimization, performance or tracking: tell us your current traffic, conversion rate and indicative budget, and we'll model the additional leads. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
