The verdict in three sentences
A B2B marketplace isn't an e-commerce store with several sellers: it's seller onboarding, a shared catalog, a multi-vendor cart and above all reliable split payments. The 2026 MVP costs between 50,000 and 100,000 EUR (55,000-110,000 USD), delivered in 5-8 months, with a target platform commission of 8 to 20%. The real question isn't "what does it cost" but "at what commission volume does it fund itself".
The line items of a marketplace MVP
| Item | What it covers | 2026 ballpark |
|---|---|---|
| Onboarding + catalog + multi-vendor cart + split | Marketplace foundation | 35,000-70,000 EUR (38,500-77,000 USD) |
| Commission engine + payouts | Commission calc, seller payments | 10,000-20,000 EUR (11,000-22,000 USD) |
| Seller KYC | Identity/company verification | 6,000-12,000 EUR (6,600-13,200 USD) |
| MVP total | 50,000-100,000 EUR (55,000-110,000 USD) |
Split payment is the critical item: it guarantees the buyer pays once and each seller receives their share, minus the platform commission.
Custom build vs packaged solution
| Criterion | Custom | Packaged (Mirakl, Sharetribe) |
|---|---|---|
| Upfront cost | 50,000-100,000 EUR | 10,000-40,000 EUR setup |
| Recurring | maintenance 15-20%/yr | license % of GMV + subscription |
| Local market adaptation | full | limited / add-ons |
| Time-to-market | 5-8 months | 2-4 months |
| Code control | full | vendor lock-in |
| Best for | specific model, local payments | fast start, standard catalog |
Packaged solutions rarely offer native local payment splitting: custom often wins on that precise point when local rails matter.
Commission projection: when it funds itself
Target commission: 12% of GMV. MVP cost: 100,000 EUR.
| Monthly GMV | Commission (12%) | Annual commission | Build recovery |
|---|---|---|---|
| 30,000 EUR | 3,600 EUR | 43,200 EUR | ~2.3 years |
| 80,000 EUR | 9,600 EUR | 115,200 EUR | ~11 months |
| 150,000 EUR | 18,000 EUR | 216,000 EUR | ~5.5 months |
| 300,000 EUR | 36,000 EUR | 432,000 EUR | ~2.7 months |
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The model takes off once monthly GMV exceeds ~80,000 EUR: annual commission then covers the build in under a year, excluding seller/buyer acquisition costs.
Mini case study
Mr. Hayes, founder of a B2B marketplace for hospitality supplies in New York, targets 40 sellers and 90,000 EUR/month GMV in year 1. He invests in a custom MVP at 80,000 EUR (88,000 USD): onboarding, shared catalog, multi-vendor cart, split payment, commission engine and light KYC. At a 12% commission, he generates 10,800 EUR/month in commissions, i.e. 129,600 EUR/year — the build is recovered in ~7 months (excluding acquisition). Automatic split saves him ~4 person-days/month of manual seller-payout reconciliation.
FAQ
What's the bare minimum to test the market? A trimmed MVP (onboarding + catalog + simple split) starts around 35,000-50,000 EUR (38,500-55,000 USD). Add KYC and advanced payouts in phase 2.
Custom or Mirakl/Sharetribe? Packaged is faster (2-4 months) but costs a % of GMV for life and integrates local rails poorly. Custom (5-8 months) gives control of split payments, decisive in some markets.
Why is split payment critical? Because a distribution error means an underpaid seller and a dispute. It must be tested with real amounts before launch; it's the item never to outsource lightly.
What platform commission should I target? Between 8 and 20% depending on sector and added value (logistics, payment guarantee). In B2B, it's often 8-15% to stay competitive against direct purchasing.
What's a realistic MVP timeline? Budget 5-8 months for a full custom MVP, less if you trim the initial scope (advanced KYC and payouts deferred to phase 2).
Let's scope your project. Give us your sector, target seller count and target GMV, and we'll price the MVP, the split payment and the commission projection. 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.
