The verdict in three sentences
In 2026, fixing the Core Web Vitals of a Singapore B2B site costs between 2,200 and 6,500 SGD depending on accumulated technical debt. The target is clear: LCP under 2.5 s, INP under 200 ms, CLS under 0.1, which triggers a visible SEO gain in 6 to 10 weeks and a conversion lift of +7 to +15%. Moving to a Next.js / JAMstack architecture is often the most profitable investment when the debt is heavy.
What the fix costs by technical debt level
Everything depends on the starting point. A WordPress site overloaded with plugins is not treated like an already-clean site to tune at the margin.
| Debt level | Typical symptoms | Service | 2026 Price (SGD) |
|---|---|---|---|
| Light | LCP 3 - 3.5 s, unoptimized images | Images, cache, lazy-load | 2,200 - 3,200 |
| Medium | LCP 3.5 - 4.5 s, blocking JS, INP > 300 ms | Front rebuild + CDN + fonts | 3,600 - 5,000 |
| Heavy | LCP > 4.5 s, heavy theme, legacy code | Next.js/JAMstack migration | 5,500 - 6,500 |
| Perf audit only | Diagnosis + prioritized plan | Report + roadmap | 1,000 - 1,700 |
A 4.2 s LCP like yours typically means medium-to-heavy debt: budget 3,600 to 5,500 SGD depending on whether a front rebuild suffices or a migration is required.
Performance targets and business impact
Google rewards speed, but conversion is what pays the bill. Here are the 2026 targets and gains.
| Metric | Before | 2026 Target | Business effect |
|---|---|---|---|
| LCP | 4.2 s | < 2.5 s | +7 to +12% conversion |
| INP | 320 ms | < 200 ms | -15% bounce rate |
| CLS | 0.25 | < 0.1 | +5% pages/session |
| Page weight | 4.8 MB | < 1.5 MB | Better mobile crawl |
| Mobile PageSpeed score | 42 | > 90 | SEO ranking gains |
On a B2B site generating 200 leads/month, +10% conversion means 20 extra leads with zero added traffic.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Mini case study
Wei is head of digital at an industrial manufacturer in Singapore. His site shows a 4.2 s LCP, a 320 ms INP and a mobile PageSpeed score of 42. He invests 4,600 SGD in a front rebuild + CDN + partial Next.js migration. After 8 weeks: LCP at 2.1 s, INP at 170 ms, score 91. The quote-form conversion rate rises from 2.4% to 2.8% (+17%). On 9,000 visits/month, that's 36 extra leads/month; with an 8% close rate and an average contract of 8,500 SGD, the work pays for itself within the first month.
FAQ
How much does a Core Web Vitals fix cost in 2026? Between 2,200 and 6,500 SGD by debt level. Light debt is fixed for 2,200-3,200 SGD; a full Next.js migration reaches 5,500-6,500 SGD.
How fast does Google factor in the improvements? Core Web Vitals are recomputed over a rolling 28 days; the SEO gain becomes measurable 6 to 10 weeks after deployment once new field data consolidates.
Do I have to migrate to Next.js/JAMstack? No. With light debt, optimizing images, cache and fonts is enough (2,200-3,200 SGD). Migration is justified mainly beyond a 4 s LCP and a heavy legacy theme.
What conversion gain should I expect? Going from 4.2 s LCP to under 2.5 s typically drives +7 to +15% conversion and -15% bounce rate on a B2B site, depending on sector and traffic quality.
Is a performance audit alone enough? The audit (1,000-1,700 SGD) gives the plan but fixes nothing. It helps prioritize, but budget the execution from the start so the diagnosis doesn't sit in a drawer.
Let's scope your project. Send us your URL and current PageSpeed scores: we'll price the fix (2,200 to 6,500 SGD) and the timeline (4 to 8 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.
