The verdict in three sentences
A heavy B2B site loses prospects before they even see the offer: past 3 seconds, roughly 53% of mobile visitors bail. In Toronto in 2026, a targeted speed optimization costs 2,000 to 7,000 CAD and ships in 1 to 3 weeks, with no full rebuild. The gains are measurable: lower TTFB and LCP, falling bounce rate and rising mobile conversion.
Technical levers and price ranges
Optimization is an a la carte project: we prioritise the best impact/cost levers after a Lighthouse and WebPageTest audit. Here are the typical items.
| Lever | Expected gain | Indicative price |
|---|---|---|
| WebP/AVIF image conversion | LCP -20 to -40% | 550-1,200 CAD |
| Lazy loading + prioritisation | LCP -10 to -25% | 400-950 CAD |
| CDN + edge caching | TTFB -50 to -70% | 700-1,600 CAD |
| JS/CSS minification + code splitting | FID/INP improved | 550-1,400 CAD |
| Font optimization + preload | CLS reduced | 280-700 CAD |
| Audit + full QA | — | 550-1,100 CAD |
| Total by scope | — | 2,000-7,000 CAD |
These 2026 figures fit a medium-sized brochure or catalogue site. A very heavy site (many third-party scripts, marketing tags) pushes toward the top of the range.
Measured business impact
Speed is not a technical whim: it shows in commercial KPIs. Here are observed orders of magnitude after optimization.
| KPI | Before | After |
|---|---|---|
| Mobile LCP | 4.2 s | 1.8 s |
| TTFB | 750 ms | 180 ms |
| Mobile bounce rate | 62% | 48% |
| Pages/session | 1.9 | 2.7 |
| Form conversion rate | 1.5% | 2.3% |
| Lighthouse perf score | 52 | 93 |
These are 2026 estimates; the amplitude depends on the starting state. The lower the site starts, the bigger the relative gain.
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Mini case study
Kevin, owner of a B2B industrial SME in Toronto, has a catalogue site at 4.2 s mobile LCP. His quote-request form converts at 1.5% on 6,000 visits/month, i.e. 90 requests. He budgets an optimization at 3,800 CAD, delivered in 2 weeks. Conversion rises to 2.3%: 138 requests/month, i.e. +48 leads. At a 15% conversion rate and a 6,000 CAD average order, that is +43,200 CAD of potential monthly revenue: the investment is covered in the first week of extra pipeline.
FAQ
Do I need to rebuild the site to gain speed? No in most cases. Images, caching, CDN and lazy loading are enough to get under 2 s LCP with no rebuild. A rebuild is only warranted if the technical base is obsolete.
WebP or AVIF? AVIF compresses better (20 to 30% more than WebP) but is a bit heavier to generate. In practice we serve AVIF with a WebP then JPEG fallback for compatibility.
Is a CDN essential? For national or international traffic, yes: it cuts TTFB by 50 to 70%. For a purely local low-traffic site the gain is more marginal.
How long to see the SEO effect? Core Web Vitals are a ranking signal: count 4 to 8 weeks for the improvement to show in positions, faster on conversion (immediate).
How do I measure the return? By comparing conversion rate and mobile bounce before/after on comparable traffic. A 0.8-point conversion gain on 6,000 visits usually pays back the optimization in a few weeks.
Let's scope your project. Send us your site URL and current Lighthouse score, and we will identify the priority levers and price the optimization. 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.
