The verdict in three sentences
A slow site does not just lose Google rankings: it loses prospects on every click. In Dublin, budget EUR 1,000 to 4,000 for a speed audit and EUR 5,000 to 12,000 for targeted performance remediation, aiming to cut load time from 5 s to 1.5 s. The gain is directly measurable: -25 % bounce rate and more qualified leads.
Audit and remediation: what you pay for
The audit prioritises, remediation executes. 2026 order-of-magnitude estimate for Dublin:
| Service | Scope | Cost | Timeline |
|---|---|---|---|
| Speed audit | Diagnosis, waterfall, quick wins | EUR 1,000 - 4,000 | 3-5 days |
| Technical front rebuild | Modern framework, optimised rendering | EUR 3,000 - 7,000 | 3-5 weeks |
| Media optimisation | WebP/AVIF, lazy, CDN | EUR 800 - 2,000 | 1 week |
| Cache & infrastructure | Edge, headers, compression | EUR 700 - 2,000 | 1 week |
| Tracking & perf budget | Monitoring, guardrails | EUR 500 - 1,500 | ongoing |
A targeted performance rebuild costs 2 to 3 times less than a full rebuild while fixing the core of the problem.
Measurable ROI of performance
Speed gains translate into concrete business metrics.
| Metric | Before | After rebuild | Effect |
|---|---|---|---|
| Load time | 5.0 s | 1.5 s | -70 % |
| Bounce rate | 62 % | 47 % | -25 % (relative) |
| Conversion rate | 1.4 % | 2.1 % | +50 % |
| Leads/month | 38 | 57 | +50 % |
| Top-10 rankings | 12 | 21 | +75 % |
| Cost per lead | EUR 46 | EUR 31 | -33 % |
On a B2B site, speed acts on both SEO (more traffic) and conversion (more leads at equal traffic).
Mini case study
Aoife, owner of an industrial B2B SME in Dublin, has a site loading in 5 s generating 38 leads/month. She invests EUR 9,000 in a targeted performance rebuild (audit EUR 1,500 + rebuild EUR 7,500) over 5 weeks. 3-month result: load time 1.5 s, +50 % leads (38 to 57/month), i.e. 19 extra leads. With a lead worth EUR 210 margin, monthly gain is EUR 3,990. Payback in about 2.5 months.
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FAQ
Targeted rebuild or full rebuild?
If the design is fine and only the technical layer lags, a targeted performance rebuild is enough and far cheaper. A full rebuild is only justified if the visual identity and structure also need reworking.
Does a slow site really hurt SEO?
Yes: speed is a ranking factor via Core Web Vitals, and a slow site raises bounce rate, an indirect negative signal. Both effects compound.
What quick wins before a rebuild?
Image compression, cache activation and removing unused scripts often deliver 30 to 40 % gain in a few days for a few hundred euros. The audit identifies them.
How do I keep speed over time?
By setting a performance budget and monitoring: every new addition (image, tag, feature) is checked. Without it, the site degrades gradually.
How soon do I see ROI?
Conversion improves from launch; SEO effect arrives in 4 to 8 weeks. Most performance rebuilds pay back in 2 to 4 months.
Let's scope your project. Send us the URL, your current lead volume and your goal: we will price the speed audit and the performance rebuild. 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.
