The verdict in three sentences
In Lagos, speed isn't a technical detail, it's your conversion rate. On 2G/3G, every second of checkout latency costs about 7% conversion, and a heavy 1.8MB checkout loses customers before they even reach the pay screen. A stripped one-page checkout — deferred JavaScript, prefilled number, Paystack inline with a bank-transfer fallback — drops below 1.5s TTI and recovers 9 to 14% of orders.
What weighs a checkout down (and how to lighten it)
Most checkouts are built for European fibre: large JavaScript bundles, multiple web fonts, uncompressed images, blocking third-party scripts. On a Lagos 2G/3G link at 2-4 Mbps with high latency, that is fatal.
| Optimization lever | Before | After |
|---|---|---|
| Total page weight | 1.8MB | 320KB |
| Initial JavaScript | All loaded | Deferred / on demand |
| Fields to fill | 8 to 10 | 3 (name, MSISDN, method) |
| Payment method | Manual pick | Paystack inline + transfer fallback |
| Time To Interactive (TTI) | 4 to 6 s | < 1.5 s |
| Blocking third-party scripts | 3 to 5 | 0 (loaded after payment) |
A prefilled MSISDN from context, Paystack inline as the primary path with a bank-transfer fallback for the weakest networks, and a three-field form remove friction at the most fragile point of the journey.
The conversion impact, quantified
2026 order of magnitude for a Lagos e-commerce optimized for low bandwidth.
| Metric | Before | After |
|---|---|---|
| TTI on 3G | 4 to 6 s | < 1.5 s |
| Abandonment at pay step | ~45% | ~31% |
| Completed orders | baseline | +9 to +14% |
| Customer data cost to pay | ~1.8MB | ~320KB |
| Bounce after "Pay" click | high | roughly halved |
Less data to download also means less airtime burned by the customer — a real argument in Nigeria, where data cost weighs on the purchase decision.
Mini case study
Chinedu, who runs an online clothing shop in Lagos, gets 2,000 checkout sessions a month with a 42% completion rate — 840 orders, average basket NGN 18,000 (about NGN 15,120,000/month). His checkout weighed 1.8MB and took 5s to become interactive.
After rebuilding the checkout (320KB, 1.4s TTI, prefilled MSISDN, Paystack inline), his completion rate climbs to 52% — 1,040 orders. Gain: 200 extra orders, about NGN 3,600,000 of additional monthly revenue, without a single extra naira of advertising.
Need a professional website?
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Become a Kolonell referral partner
Do you know online shops in Nigeria whose payment drags on mobile? Refer them. Our referral partner program pays you 15% + 5% recurring on a showcase site, 12% on e-commerce, 10% on a marketplace and 8% on an institutional project. One referral that turns into an e-commerce project can earn you hundreds of thousands of naira.
FAQ
Do I need to rebuild the whole site to lighten the checkout?
No. You can isolate and rebuild only the payment funnel while keeping the rest of the site. It's often 2 to 3 weeks of focused work.
Is the Paystack inline plus transfer fallback reliable?
Yes. Paystack inline handles cards and USSD; the bank-transfer fallback catches the weakest networks so no customer is stranded at the pay step.
Is 320KB really achievable with product images?
Product images load lazily after the payment form is shown. The critical checkout stays light; visuals arrive progressively.
How much conversion can I really gain?
As an order of magnitude, +9 to +14% completed orders on low bandwidth, mainly by removing latency and unnecessary fields at the pay step.
Let's talk about your project. We rebuild your checkout for Lagos low-bandwidth networks and turn speed into sales. 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.
