The verdict in three sentences
Optimizing the Core Web Vitals of a B2B store costs 5,000 to 13,000 SGD in 2026, depending on accumulated technical debt. The typical goal is moving an LCP from 4.2 s to under 1.8 s through WebP/AVIF images, lazy loading, JavaScript reduction and caching. The documented rule is brutal: every extra second of load time costs roughly 7 % of conversions.
What a performance optimization funds
Site speed hinges on about a dozen levers. Here are the line items and 2026 ranges on the Singapore market.
| Lever | Main effect | Range (SGD) |
|---|---|---|
| WebP/AVIF image conversion | -40 to -70 % image weight | 900 - 2,600 |
| Lazy loading and LCP prioritization | Faster LCP | 1,100 - 3,100 |
| JS reduction and code splitting | Better INP | 1,400 - 4,000 |
| Caching and CDN | Lower TTFB | 700 - 2,100 |
| Font optimization | Controlled CLS | 400 - 1,300 |
| Audit and Lighthouse retest | Score > 90 | 600 - 1,700 |
A site on a modern stack needs little work; an old theme overloaded with plugins climbs toward the top of the range.
The measured impact on revenue
Take a B2B store generating 280,000 SGD monthly revenue with a 4.2 s LCP and a 1.6 % conversion rate. Here is the projection as speed improves.
| LCP | Conversion rate | Monthly revenue | Gain vs baseline |
|---|---|---|---|
| 4.2 s | 1.6 % | 280,000 SGD | baseline |
| 3.0 s | 1.9 % | 332,500 SGD | +52,500 SGD |
| 2.2 s | 2.2 % | 385,000 SGD | +105,000 SGD |
| 1.8 s | 2.4 % | 420,000 SGD | +140,000 SGD |
With a 10,000 SGD investment, a monthly gain of 52,500 SGD pays back the project in under a week of additional revenue.
Mini case study
Wei, e-commerce lead at a Singapore industrial-supply distributor, faces a 4.4 s LCP and a 78 % cart abandonment rate. He commissions an optimization at 9,500 SGD: converting 3,200 images to AVIF, lazy loading, JS splitting and a CDN. LCP drops to 1.7 s, conversion rises from 1.5 % to 2.3 %. On a 250,000 SGD monthly baseline, that is nearly 133,000 SGD in additional monthly revenue. The investment is absorbed in two days of sales.
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FAQ
How long does a Core Web Vitals optimization take?
Expect 3 to 5 weeks depending on page count and site complexity. Large catalogues with thousands of images need more processing time.
WebP or AVIF?
AVIF compresses better but has slightly newer support. Best practice is serving AVIF with a WebP fallback, covering all browsers.
Do we need to rebuild the whole site?
Rarely. Most gains come from optimizing existing code, images and loading. A full rebuild is only justified when technical debt is too heavy.
What Lighthouse score should we target?
A mobile performance score above 90 is realistic, with LCP under 2.5 s, INP under 200 ms and CLS under 0.1.
Are the gains durable?
Yes, as long as no new heavy plugin or script is reintroduced. A quarterly check is enough to preserve the results.
Let's scope your project. Send us your URL and current Lighthouse score, and we will price the optimization against an LCP target and an estimated conversion impact. 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.
