Cost + timeline for a serious B2B Magento implementation?
Real ranges from 40+ shipped projects:
Greenfield Magento Open Source B2B (no migration):
- Timeline: 12-16 weeks build + 4 weeks stabilisation
- Build cost: $30k, $80k depending on segment-pricing complexity + ERP integration depth
- Extensions: $3k, $8k one-time (Companies, Quote Workflow, Subscriptions, etc.)
- Hyvä theme licence: $1,000 one-time
- Hosting: $400, $1,500/mo (Cloudways / dedicated)
- 3-year TCO: $80k, $200k
Migration from Shopify Plus / SAP Hybris / custom portal:
- Timeline: 16-24 weeks build + 4 weeks parallel run + 4 weeks stabilisation
- Build cost: $50k, $140k
- Data migration: $10k, $30k (companies, buyers, pricing, AR balances)
- ERP re-integration: $15k, $50k depending on system
- 3-year TCO: $130k, $320k
Adobe Commerce B2B (vendor-supported):
- Same build cost as Open Source + Adobe Commerce license $30k, $80k/yr based on GMV
- 3-year licence: $90k, $240k on top of build cost
- Pays for itself when (a) you’d need 24/7 SLA anyway, or (b) you’re >$10M GMV with full B2B usage
Below $5M B2B GMV: Open Source + extensions is the right call. $5, $10M: close call, depends on team. Above $10M: Adobe Commerce + Cloud often wins on operational cost despite the licence.
Cheapest B2B build that’s not a regret: $30k. Anything cheaper skips ERP integration or quote workflow and you’ll rebuild within 18 months. The honest floor.