The 5 mistakes that kill an e-commerce store in the first month

80% of e-commerce stores that launch close within 12 months. The market is saturated, true. But above all, most fall into the same identifiable, avoidable traps. The five deadliest.

1. Badly synced stock

You sell a product at 2pm, supplier stock hits 0 at 2:05pm, but your listing is still live on Cdiscount at 2:30pm. Result: orphan orders, customer disputes, marketplace penalties, account suspension. It's the number one cause of early closures. Real-time stock sync = non-negotiable.

2. Weak product sheets

A too-short title or a single photo angle doesn't rank. Marketplaces have internal visibility algorithms that favor complete listings: 80+ character titles with natural keywords, 4+ high-resolution images, structured description, all marketplace attributes filled in. A weak listing gets 5 times fewer impressions than an optimized one.

3. Poorly planned shipping fees

Either you offer free delivery and erode your margin on every order, or you charge shipping and your conversion rate collapses. The right solution: build the shipping cost into the displayed selling price and present delivery as 'free' (mentally, buyers hate seeing an extra cost at checkout).

4. Absent or late support

Cdiscount penalizes sellers who don't reply within 24h. Beyond the algorithmic penalty, an unanswered customer message becomes a dispute, a return, or a 1-star review. No new seller can manually monitor their inbox 24/7 — that's precisely why a first-level AI support agent is essential.

5. Premature marketplace choice

'Let's attack Amazon directly, that's where the money is.' Classic mistake. Amazon has the worst conditions (commission, returns, logistics requirements) for new sellers. Winning strategy: start on Cdiscount or Fnac (softer commissions, an audience less hostile to newcomers), build a positive track record, then deploy to Amazon from a position of strength.

What these 5 mistakes have in common

All of them can be avoided from day one with the right technical infrastructure. Stock sync, catalog management, automated support, multi-marketplace integration: all of this exists as packaged tooling. A 2026 seller launching without this infrastructure doesn't just have a competitive disadvantage — they are mathematically doomed.