The verdict in three sentences
A B2B site that loads slowly often shows a bounce rate of 60% or more, which sabotages SEO and sales. In 2026, a performance audit costs EUR 800-1,500 and back/front fixes EUR 2,000-7,000, with optimized hosting/CDN at +EUR 40-120/month. The golden rule holds steady: every 100 ms saved = about +1% conversion.
Diagnose before fixing
A serious audit measures real load times (CrUX field data + Lighthouse tests), identifies bottlenecks (server TTFB, SQL queries, images, JavaScript), and prioritizes fixes by impact/effort ratio. We always separate the back end (server response time) from the front end (browser rendering), because they carry different costs and levers.
| Symptom | Likely cause | Fix | Typical gain |
|---|---|---|---|
| TTFB > 1.5 s | Shared hosting, no cache | Server cache + CDN | -60 to -80% TTFB |
| Heavy images | No AVIF/WebP | Compression + srcset | -40 to -70% weight |
| Blocking JS | Synchronous scripts | Deferred + code splitting | -1 to -3 s |
| High bounce | Load > 4 s | Full project | -10 to -20 pts |
| Slow database | Unindexed queries | SQL optimization | -50% query time |
2026 pricing and measured impact
The budget depends on the stack (WordPress, headless, custom) and the depth of issues. Here are 2026 ballpark figures and a representative before/after table for a B2B e-commerce site.
| Service | 2026 price (EUR ex. VAT) | Timeline | |
|---|---|---|---|
| Full performance audit | 800 - 1,500 | 3-5 days | |
| Front-end fixes (images, JS, CSS) | 1,200 - 3,500 | 1-3 weeks | |
| Back-end fixes (cache, SQL, TTFB) | 1,500 - 4,500 | 1-3 weeks | |
| Optimized hosting/CDN | +40 - 120/month | - | |
| Full project | 2,000 - 7,000 | 2-5 weeks | |
| Indicator | Before | After | Gain |
| Load time | 5.2 s | 1.9 s | -63% |
| Bounce rate | 62% | 44% | -18 pts |
| Checkout conversion | 1.1% | 1.6% | +45% |
| Organic traffic | Base 100 | 122 | +22% |
Mini case study
Karim, manager of a B2B industrial-supplies e-commerce site in Casablanca, sees a 62% bounce rate and a 5.2 s load time. The audit billed at EUR 1,200 reveals a 1.8 s TTFB and uncompressed images. The fixes, quoted at EUR 4,800, bring the load time down to 1.9 s. On EUR 300,000 annual revenue, moving conversion from 1.1% to 1.6% generates about +EUR 136,000 annual revenue: the EUR 6,000 project pays back in under 3 weeks.
FAQ
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Is a performance audit really necessary before fixing?
Yes. Fixing without a diagnostic means treating symptoms at random. The audit prioritizes the 20% of fixes that deliver 80% of the gain, avoiding wasted spend.
How long until I see results?
Speed gains are immediate after deployment. The SEO impact (rankings, traffic) is measured over 4 to 8 weeks, the time Google needs to recollect field data.
Do I need to change hosting?
Not always. A well-configured server cache and a CDN are often enough. A hosting change is justified if TTFB stays high despite optimization, for +EUR 40-120/month.
What is the real cost of inaction?
A site at 5 s instead of 2 s typically loses 15 to 30% of conversions. On EUR 300,000 revenue, that is EUR 45,000-90,000 in lost annual revenue.
Is mobile handled differently?
Yes, it is the priority: over 60% of B2B traffic is mobile in 2026, often on mid-range connections. Optimization targets the mobile experience first.
Let's scope your project. Send us your URL, your stack, and your annual revenue; we will scope an audit (EUR 800-1,500) then a prioritized fix plan. 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.
