The verdict in three sentences
A catalog site shows products but keeps selling offline: every ready-to-buy visitor has to call or visit. Adding e-commerce (about 12,000 to 40,000 USD in 2026) turns existing traffic into orders, with catalog reuse and SEO preserved. First online revenue arrives fast because the audience and ranking are already there.
What you need to add
Moving from catalog to selling needs a few key blocks, without rebuilding everything. 2026 ballpark for a New York company.
| Module | 2026 range | Timeline |
|---|---|---|
| Cart + checkout flow | 3,000 - 7,000 USD | 2 - 3 wks |
| Payment (cards + wallets) | 2,200 - 6,000 USD | 2 - 3 wks |
| Stock management + variants | 2,200 - 7,000 USD | 2 - 3 wks |
| Shipping + carriers | 1,800 - 5,000 USD | 1 - 2 wks |
| Catalog reuse + SEO | 2,800 - 7,000 USD | 2 - 3 wks |
| Project total | 12,000 - 40,000 USD | 6 - 12 wks |
Catalog reuse and preserved SEO
The #1 risk of a migration is losing earned ranking. We keep existing URLs or set 301 redirects, enrich product pages (price, stock, variants) and add Product structured data. Done well, the migration preserves 90 to 100 % of organic traffic and often improves it thanks to richer pages.
First revenue and ROI
Since the audience already exists, conversion starts at launch. A catalog site with 8,000 visitors/month converting at 1.5 % with a 90 USD average basket generates ~10,800 USD/month of online revenue from the first quarter.
| Metric | Before (catalog) | After (e-commerce) |
|---|---|---|
| Online sales | 0 USD | yes |
| Visitor conversion | contact only | 1 - 2.5 % |
| Order tracking | manual | automatic |
| Buy availability | office hours | 24/7 |
| Customer data | limited | complete |
Need a professional website?
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Mini case study
James, owner of a home-equipment distributor in New York. His catalog site draws 9,000 visitors/month but sells nothing: he gets ~40 calls/day, half of them after hours. Adding e-commerce is quoted at 24,000 USD. From month 2 the store converts 1.8 % at a 100 USD average basket, i.e. ~16,000 USD/month of online revenue, a significant share of it outside opening hours. ROI in under 3 months.
FAQ
Will I lose my ranking by migrating? No, if URLs are kept or 301 redirects and structured data are set. A well-prepared migration preserves 90 to 100 % of organic traffic and often improves it.
Do I need to rebuild everything? No, we add the e-commerce blocks (cart, payment, stock) to the existing site when the tech base allows. Otherwise a targeted rebuild is still faster than a fresh project because the content is already there.
Which payment methods for the US? Cards and Apple/Google Pay are essential, complemented by digital wallets. We integrate webhooks and reconciliation so no order is lost.
How long before first online revenue? Often in the first week after launch, since audience and SEO already exist. The real work is securing payment, stock and shipping.
How do you handle shipping? We connect one or more carriers with automatic fee calculation and tracking. Clear delivery estimates at checkout reduce cart abandonment.
Let's scope your project. Tell us your number of products, monthly traffic and target payment methods: we price the e-commerce add-on and the expected first revenue. 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.
