The verdict in three sentences
A custom B2B partner portal costs between 30,000 and 90,000 EUR in 2026 depending on the number of modules (deal registration, MDF, catalogue, training) and the depth of CRM/ERP integration. Expect 12 to 18 weeks of development, with SSO and fine-grained role management as the non-negotiable foundation. Done right, it cuts the indirect sales cycle by around 20% and makes deal attribution reliable, which in turn cleans up reseller commission calculation.
What the budget actually covers
A reseller portal is not a document extranet: it is a transactional app that must mirror your partner program (Silver/Gold/Platinum tiers, MDF rules, deal protection). Price is driven mostly by active modules and the level of automation.
| Module | Scope | 2026 order of magnitude (EUR) |
|---|---|---|
| Core + SSO + roles | Auth, partner tiers, dashboard | 12,000 - 22,000 |
| Deal registration | Declaration, protection, approval workflow | 8,000 - 16,000 |
| Partner catalogue & pricing | Tier pricing, discounts, quotes | 6,000 - 14,000 |
| MDF & co-marketing | Fund requests, proofs, tracking | 5,000 - 12,000 |
| Training & certification | Learning paths, quizzes, badges | 4,000 - 10,000 |
| CRM/ERP integration | Account, opportunity, stock sync | 6,000 - 18,000 |
Two thirds of the budget go into the transactional core and integration; the rest into UX and reseller-side change management.
CRM/ERP integration makes or breaks the project
A portal disconnected from the CRM creates double entry and kills adoption. The 2026 challenge is real-time sync of accounts, opportunities, prices and availability, with clean handling of attribution conflicts.
| Target system | Exchange mode | Typical latency | Integration cost (EUR) |
|---|---|---|---|
| Salesforce / HubSpot | Real-time REST API | < 5 s | 8,000 - 18,000 |
| Microsoft Dynamics | API + webhooks | < 10 s | 9,000 - 20,000 |
| SAP / internal ERP | Middleware + batch | 15 min - 1 h | 12,000 - 25,000 |
| Stock/price sync | REST or files | Real-time to hourly | 4,000 - 10,000 |
Simple rule: each additional target system adds 8,000 to 20,000 EUR and 2 to 4 weeks of timeline.
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Mini case study
Thomas, indirect sales director at a software vendor in Lyon, runs 45 resellers generating 6.2M EUR of indirect revenue. Without a portal, deal attribution takes 3 days and 6% of revenue is lost to attribution disputes. He invests 58,000 EUR in a portal with deal registration and Salesforce sync. Result over 12 months: sales cycle down 20% (from 75 to 60 days), attribution disputes cut threefold, and +310,000 EUR of additional indirect revenue captured through better velocity. The portal pays for itself in under 3 months.
FAQ
What is the difference between an extranet and a partner portal? An extranet mainly shares documents and news. A partner portal is transactional: deal registration, quotes, MDF, CRM sync. Budget moves from 15,000-30,000 EUR to 30,000-90,000 EUR.
Should I buy a PRM or build custom? A SaaS PRM (like PartnerStack) costs 1,000-4,000 EUR/month but fits atypical programs poorly. Custom becomes worthwhile beyond 40-50 resellers or when your attribution rules are specific.
How long until launch? Expect 12 to 18 weeks: 4 for the core and SSO, 6 to 10 for business modules, 2 to 4 for CRM integration and pilot-reseller acceptance testing.
What is the yearly maintenance budget? Plan 15 to 20% of the initial cost per year, i.e. 5,000 to 15,000 EUR, for enhancements, security and keeping up with CRM/ERP version upgrades.
Is SSO really essential? Yes. Without SSO, adoption drops as resellers juggle multiple passwords. SSO (SAML/OIDC) costs 3,000 to 6,000 EUR and pays back in avoided support.
Let's scope your project. Share your reseller count, target CRM and priority modules (deal registration, MDF, catalogue) for a right-sized estimate. 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.
