The verdict in three sentences
A manufacturing website where 70 % of pages fail Core Web Vitals on mobile loses quote requests, especially from buyers checking your capabilities on the shop floor or at a trade fair. In the German market, a 2026 remediation project costs 6,000 to 18,000 EUR including the audit, for 3 to 6 weeks of work. The targets to write into the contract are clear: LCP under 2.5 s, INP under 200 ms, CLS under 0.1 on at least 75 % of real visits.
Where your site stands against Google thresholds
Google assesses each URL on real Chrome data (the CrUX dataset), at the 75th percentile of visits. Here is a common profile for a German machine or component maker whose site was built between 2017 and 2020, with product catalogues, datasheets and heavy CAD previews.
| Metric | Google good threshold | Typical measured profile | Most frequent cause |
|---|---|---|---|
| LCP (largest element rendered) | under 2.5 s | 4.4 s | 2 MB hero image in JPEG |
| INP (interaction responsiveness) | under 200 ms | 510 ms | third-party scripts, heavy JavaScript menu |
| CLS (visual stability) | under 0.1 | 0.27 | consent banner and fonts without reserved space |
| TTFB (server response) | under 0.8 s | 1.5 s | shared hosting without caching |
| Average page weight | benchmark 1.5 MB | 6.1 MB | uncompressed images, autoplay video |
| Third-party scripts loaded | benchmark 5 to 8 | 21 | tracking tools piled up over years |
INP replaced FID in March 2024, and it is often the metric that tips industrial sites into the red: a badly coded product configurator or capability filter is enough to exceed 400 ms. In Germany, consent management platforms required under the TDDDG are a frequent INP and CLS offender when configured to block rendering.
The detailed quote: audit then fixes
The figures below are 2026 German market orders of magnitude for a performance-focused web agency, for a site of 80 to 300 pages.
| Item | 2026 range (EUR, excl. VAT) | Timeline | Expected gain |
|---|---|---|---|
| Audit (CrUX, Lighthouse, performance traces, prioritised plan) | 2,000 to 4,000 | 1 week | priced list of fixes |
| AVIF and WebP images, reserved dimensions, lazy loading | 1,000 to 3,000 | 3 to 5 days | LCP minus 1 to 2 s |
| Third-party scripts cut by half, loaded after consent | 1,000 to 3,500 | 1 week | INP minus 150 to 250 ms |
| Lighter menu, filters and configurator code | 1,000 to 4,500 | 1 to 2 weeks | INP under 200 ms |
| Caching, CDN, server tuning | 500 to 1,500 | 2 to 4 days | TTFB under 0.8 s |
| Fonts and consent banner stabilised | 500 to 1,500 | 2 to 3 days | CLS under 0.1 |
| Total project | 6,000 to 18,000 | 3 to 6 weeks | 75 % of pages green |
One point often missed: CrUX data is computed over a rolling 28 days. Once fixes ship, allow about 4 weeks before the Search Console report turns green. Build this lag into your planning and acceptance criteria.
What to require in the contract
Ask for targets measured on field data, not only on a lab Lighthouse score. Require the list of removed or deferred third-party scripts, signed off by marketing. Include an automated performance check before every release, so a new 40 MB video does not undo the work three months later. Finally, make sure datasheets and certificates stay downloadable and indexed: for industrial buyers, they are often the most visited documents.
Mini case study
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Katrin, head of digital at a 220-person machine tool maker in Berlin-Spandau (illustrative example), finds that 70 % of her pages fail on mobile. The site gets 8,000 visits a month and 48 quote requests, a 0.6 % conversion rate. After a 3,000 EUR audit and 9,000 EUR of fixes, a cautious target is 0.8 %, or 64 requests a month, 16 more. If 1 request in 20 becomes an order with a 6,000 EUR margin, the gain is about 4,800 EUR of margin a month, and the 12,000 EUR project pays back in about 2.5 months.
FAQ
How much does Core Web Vitals remediation cost in 2026?
In Germany, budget 6,000 to 18,000 EUR including a 2,000 to 4,000 EUR audit. A small site under 50 pages can stay under 6,000 EUR in total.
Which targets should we set?
LCP under 2.5 s, INP under 200 ms and CLS under 0.1, measured at the 75th percentile of real visits. Aim for at least 75 % of URLs green in Search Console.
How long before results show?
Fixes take 3 to 6 weeks, then about 4 weeks of CrUX collection before reports reflect the gains. Count 2 to 3 months overall.
Do we need a full rebuild?
Rarely: around 80 % of gains come from images, third-party scripts and caching. A rebuild makes sense if the theme or page builder ships more than 2 MB of code per page.
Does Kolonell offer SEO follow-up after the fixes?
Yes, through the Kolonell SEO plans Essentiel at 100,000 FCFA (150 EUR), Growth at 200,000 FCFA (300 EUR) or Premium at 350,000 FCFA (530 EUR) a month, detailed on the SEO page.
Let's scope your project. Send us your site address and your three most strategic pages: we will price the audit, the priority fixes and the time to green. 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.
