The verdict in three sentences
A technical SEO audit of a 500-page B2B website in Berlin costs 4,000 to 7,000 EUR in 2026 for the audit alone, and 8,000 to 12,000 EUR with a prioritized action plan, 3 months of support and deliverables in English and German. After a redesign that cuts organic traffic by 35 %, the main cause is well known: around 80 % of post-redesign losses come from missing or mismapped 301 redirects. The audit must start by matching old URLs that earned traffic to new ones, before tackling Core Web Vitals or internal linking.
Deliverables of a serious technical audit
An industrial software vendor (maintenance, production monitoring, quality) lives on very specific queries: standard names, features, integrations, often in both German and English. Every page dropped from the index is a stream of demo requests gone. For reference, the same scope costs 2,500 to 9,000 EUR excl. VAT in Grenoble, France.
| Deliverable | Scope | Included at 4,000-7,000 EUR | Included at 8,000-12,000 EUR |
|---|---|---|---|
| Full crawl | 500 pages + assets, status codes, depth, orphan pages | Yes | Yes |
| Indexing analysis | Search Console, coverage, canonicals, noindex, sitemaps | Yes | Yes |
| Redirect audit | Old/new URL mapping, chains, 404s with backlinks | Partial (top 100 URLs) | Full + deploy-ready redirect file |
| Hreflang check (DE/EN) | Return tags, x-default, language mismatches | Yes | Yes + corrected mapping |
| Core Web Vitals | LCP, INP, CLS per template, mobile and desktop | Yes | Yes + developer tickets |
| Internal linking | Pillar pages, anchors, product page depth | Summary | Detailed linking plan |
| Action plan | Issue list | Unprioritized | Prioritized by impact and effort, 30/60/90 days |
| Language of deliverables | English or German | One language | Both, plus walkthrough for German dev team |
Typical timeline: 2 to 4 weeks for the audit, then 3 months of follow-up in the full offer.
Why traffic drops after a redesign: the numbers
Here are the causes seen on B2B sites redesigned in 2025-2026, with their estimated share of traffic loss and fix cost in Berlin.
| Cause | Estimated share of losses | Search Console signal | Indicative fix cost |
|---|---|---|---|
| 301 redirects missing or pointing to homepage | 80 % | Spike in 404s, "Not found" pages | 1,200 to 3,000 EUR |
| Content removed or merged without equivalent | 8 % | Lost queries on specific terms | 2,000 to 5,000 EUR (rewriting, DE and EN) |
| JavaScript rendering not indexed | 5 % | "Crawled, currently not indexed" | 3,000 to 8,000 EUR |
| Canonical or noindex tags inherited from staging | 4 % | "Excluded by noindex" | 400 to 1,000 EUR |
| Core Web Vitals regression (LCP above 2.5 s) | 2 % | Core Web Vitals report | 2,000 to 6,000 EUR |
| Weaker internal linking | 1 % | Deep pages crawled less | 1,500 to 3,500 EUR |
In practice, fixing redirects recovers 50 to 70 % of lost traffic within 4 to 8 weeks, provided Google still knows the old URLs.
Mini case study
Lukas, marketing lead at an industrial maintenance software vendor in Berlin, sees organic traffic fall 35 % three months after the redesign: from 12,000 to 7,800 visits per month. The site converted 1.2 % of visits into demo requests, so 144 demos per month before, 94 after. The close rate is 6 % on an average first-year contract of 22,000 EUR.
- Monthly loss: 50 demos × 6 % = 3 contracts, so 66,000 EUR of potential revenue per month.
- Selected full audit: 10,500 EUR with redirect file, bilingual deliverables and 3 months of follow-up.
- Estimated result: 60 % of lost traffic recovered in 8 weeks, i.e. 2,520 visits and 30 demos per month, about 1.8 contracts.
- The audit is paid back by the first contract signed thanks to recovered traffic.
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FAQ
How much does a technical SEO audit cost for a B2B website in Berlin in 2026?
Expect 4,000 to 7,000 EUR for a 500-page site, and 8,000 to 12,000 EUR with a prioritized plan, 3 months of support and English and German deliverables. The audit takes 2 to 4 weeks.
Can lost traffic be recovered after a redesign?
In most cases yes: adding the missing redirects recovers 50 to 70 % of traffic within 4 to 8 weeks. The longer you wait, the more Google forgets old URLs and their backlinks.
Should we audit before a redesign instead?
It is much cheaper: a pre-launch audit with redirect mapping costs 2,000 to 4,000 EUR and prevents the drop. Afterwards, the bill comes on top of months of lost demo requests.
Are Core Web Vitals the priority?
Rarely first on a B2B site: they account for about 2 % of post-redesign losses. They move up only if mobile LCP exceeds 4 seconds on product pages.
Do we need deliverables in German?
If your development team or agency works in German, yes: bilingual deliverables add 800 to 1,500 EUR but cut implementation errors and back-and-forth.
Let's scope your project. Send us your site URL, redesign date and a Search Console export, and we will price an audit from 4,000 to 12,000 EUR delivered in 2 to 4 weeks. 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.
