The verdict in three sentences
In the Irish market, mobile speed is not a technical detail: it decides whether a prospect sees your offer or leaves. In Dublin in 2026, a performance project costs EUR 1,800 to 3,600 and targets a mobile LCP <2.5 s, a page weight <500 KB and a bounce reduction of -35 %. It is one of the best-ROI investments for a B2B site.
What a fast site on mobile actually costs
Optimising for constrained mobile networks demands stricter choices than for fibre: every kilobyte counts. Separate the audit from the project.
| Service | Content | Timeline | 2026 price (EUR) |
|---|---|---|---|
| Performance audit | Mobile metrics, weight, prioritised plan | 5 days | 700 - 1,200 |
| Light project | AVIF/WebP images, cache, lazy-load | 2 weeks | 1,800 - 2,400 |
| Standard project | + CDN, fonts, deferred JS, TTFB | 3 weeks | 2,600 - 3,200 |
| Heavy project | + front refactor, critical images | 3-4 weeks | 3,200 - 3,600 |
These figures are a 2026 order of magnitude for a B2B brochure site. Hosting with a well-placed CDN often makes the biggest difference on TTFB.
Technical targets and their bounce effect
On mobile, halving page weight translates directly into visitors who stay. Here are the targets and their impact.
| Lever | 2026 target | Estimated effect |
|---|---|---|
| Page weight | < 500 KB | -20 to -30 % bounce |
| Image format | AVIF/WebP | -50 to -70 % image weight |
| Mobile LCP | < 2.5 s | +8-15 % conversion |
| Third-party scripts | < 3 | Less render blocking |
| Cache and CDN | enabled | TTFB cut by 2-3x |
A well-run project often moves a site from 1.8 MB and 7 s LCP to under 500 KB and 2.3 s, radically changing the experience on constrained mobile.
Mini case study
Aoife, who runs a B2B equipment distribution firm in Dublin, sees a 68 % mobile bounce rate and 5 quote requests a month. She approves a standard project at EUR 2,900. After three weeks, page weight drops from 1.7 MB to 480 KB, LCP from 6.8 s to 2.4 s, and bounce falls to 44 %. Monthly requests rise to 8. At an average deal of EUR 4,500, the three extra leads pay back the project in one to two months.
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FAQ
Why optimise specifically for mobile networks?
Because a large share of B2B visitors in Dublin browse on the move, often on congested networks. A site built for fibre loses them before content even appears.
Is the AVIF format really supported?
Yes, it is broadly supported in 2026 with a WebP fallback. It reduces image weight by 50-70 % versus JPEG, which is decisive on mobile.
Does a CDN change much?
A lot: a CDN with nearby points of presence sharply reduces TTFB and therefore LCP. It is often the best gain-to-cost lever.
How long before the bounce drops?
Effects are almost immediate after launch: mobile bounce falls within the first weeks of traffic on the optimised version.
Do I need to rebuild the whole site?
Rarely. A light or standard project suffices in most cases; a heavy refactor only applies to very bloated sites.
Let's scope your project. Send us your site URL and current mobile scores: we will price the audit then the project with weight and LCP targets. 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.
