The verdict in three sentences
If your site fails Core Web Vitals on mobile, the most cost-effective option for a mid-sized B2B company is almost always an audit with fixes at 3,500 to 9,000 USD (3,000 to 8,000 EUR in France), which solves 70 to 80% of issues without touching the design. An audit alone (900 to 2,000 EUR, up to 2,500 USD in London or Miami) only helps if you have an in-house team able to apply the recommendations. A technical rebuild at 13,000 to 20,000 USD or more is justified when the theme, the page builder or the hosting is itself the cause.
The 2026 thresholds and what makes sites fail
Google assesses three metrics on real visitor data (CrUX report), at the 75th percentile. Since March 2024, INP has replaced FID, and it is INP that fails most script-heavy B2B sites.
| Metric | Good | Needs improvement | Poor | Common cause on a B2B site |
|---|---|---|---|---|
| LCP (main content) | under 2.5 s | 2.5 to 4 s | over 4 s | 1 to 3 MB hero image, slow shared hosting |
| INP (responsiveness) | under 200 ms | 200 to 500 ms | over 500 ms | Chat widget, marketing tags, heavy page builder |
| CLS (stability) | under 0.1 | 0.1 to 0.25 | over 0.25 | Cookie banner, web fonts, images without dimensions |
| TTFB (indicative) | under 0.8 s | 0.8 to 1.8 s | over 1.8 s | No cache, distant server, unoptimised PHP |
| Mobile page weight | under 1.5 MB | 1.5 to 3 MB | over 3 MB | Background videos, sliders, unused libraries |
On the port logistics, construction and services sites we audit, the culprits keep coming back: a homepage slider, a background video, 6 to 12 third-party scripts (Analytics, pixel, chat, map, CRM) and fonts loaded from several domains.
Three costed levels of intervention
| Criterion | Audit only | Audit + fixes | Technical rebuild |
|---|---|---|---|
| 2026 price | 900 to 2,000 EUR (up to 2,500 USD) | 3,000 to 8,000 EUR (3,500 to 9,000 USD) | 12,000 to 25,000 EUR (13,000 to 20,000+ USD) |
| Timeline | 3 to 5 days | 2 to 4 weeks | 8 to 12 weeks |
| Deliverable | Prioritised report, 20 to 40 actions | Fixes applied and measured | New foundation (Next.js or lean theme) |
| Images and fonts | Recommendations | AVIF/WebP conversion, preloading, subsetting | Automated pipeline |
| Third-party scripts | Inventory | Deferral, removal, facades | Non-blocking architecture |
| Cache and CDN | Recommendations | Cloudflare or equivalent setup | Static edge rendering |
| Typical LCP gain | none directly | 30 to 60% | 50 to 75% |
We commit to a method, not a score: turning green in Search Console takes 28 days of real-user data after the fixes.
Mini case study
Karim, managing director of a 35-employee freight forwarding and port logistics company in Marseille, gets 3,100 mobile visits a month and 42 quote requests on a WordPress site built with Elementor. His figures: LCP 4.6 s, INP 380 ms, CLS 0.22. He chooses the audit with fixes for 5,400 EUR (about 5,900 USD). After 4 weeks, LCP drops to 2.1 s, INP to 160 ms and CLS to 0.04. With a conservative 12% lift on forms, he gets about 5 more quote requests a month. If one in five becomes a client worth 4,500 EUR of annual margin, the gain exceeds 50,000 EUR a year for a one-off spend of 5,400 EUR. A logistics firm in London or Miami would see the same ratio.
FAQ
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Do Core Web Vitals really affect rankings?
They are part of the page experience signals, with modest weight compared with content relevance. Their clearest effect is commercial: 8 to 20% more mobile form conversions in our measurements.
Do we need a PageSpeed score of 100?
No. The lab score is a diagnostic tool; only real-user CrUX data counts for Google. A site scoring 75 on mobile can pass all three thresholds.
Can we keep Elementor or Divi?
Often yes, with a strict configuration, but INP is hard to get under 200 ms beyond 15 to 20 widgets per page. If the audit shows the builder accounts for over 50% of JavaScript, a rebuild becomes cheaper over 3 years.
How long do the gains last?
Without discipline, a site loses 20 to 30% of its gains within 6 months as new scripts are added. Monthly monitoring at 150 to 300 EUR with regression alerts prevents that drift.
Should we change hosting provider?
If TTFB exceeds 1.2 s, yes. Moving from 8 EUR a month shared hosting to managed hosting with CDN at 30 to 60 EUR a month is usually enough.
Let's scope your project. Send us your site URL and we will assess the right level of intervention, from a 900 EUR audit to fixes at 3,500 to 9,000 USD, with a 2 to 4 week timeline. 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.
