The verdict in three sentences
For a mid-market company of 1,000 to 1,500 employees, a custom supplier portal costs between EUR 40,000 and 100,000 excluding VAT in 2026, delivered in about 5 months. When 600 suppliers are handled by email and spreadsheets, the measured gain is around 25% of procurement time, not counting lower compliance risk (CSRD supply chain reporting, the EU due diligence directive, insurance and tax certificates). Custom development beats SaaS suites as soon as your supplier qualification processes or ERP integrations go beyond the standard.
What a supplier portal includes and what it costs
The budget is built module by module. Most mid-market firms start with the first three and add tenders in phase 2.
| Module | Key features | Effort (days) | 2026 price excl. VAT (order of magnitude) |
|---|---|---|---|
| Supplier onboarding | Self-registration, profile, categories, approval | 25 to 35 | EUR 15,000 to 22,000 |
| Compliance documents | Chamber of Commerce extract, tax and insurance certificates, automatic reminders | 15 to 25 | EUR 9,000 to 15,000 |
| Supplier evaluation | Quality scores, lead times, action plans | 10 to 20 | EUR 6,000 to 12,000 |
| Tenders (RFQ / RFP) | Specifications, responses, comparison grid | 30 to 45 | EUR 18,000 to 28,000 |
| ERP integration (SAP, Exact, Dynamics) | Vendor sync, orders, invoices | 15 to 30 | EUR 9,000 to 20,000 |
| Procurement dashboard | Spend by category, risk, KPIs | 8 to 12 | EUR 5,000 to 8,000 |
A core portal (onboarding, compliance, dashboard) therefore sits around EUR 40,000; the full version with tenders and SAP integration approaches EUR 100,000. EU hosting and maintenance add EUR 1,200 to 2,500 per month.
Custom build or off-the-shelf suite
| Criterion | SaaS suite (Ivalua, Coupa, Jaggaer type) | Custom portal |
|---|---|---|
| Entry cost | EUR 30,000 to 80,000 of configuration | EUR 40,000 to 100,000 of development |
| Recurring cost | EUR 40,000 to 120,000 per year in licences | EUR 15,000 to 30,000 per year maintenance |
| Cumulative 5-year cost | EUR 230,000 to 680,000 | EUR 115,000 to 250,000 |
| Fit with your processes | Limited to configuration | Full |
| Time to go live | 4 to 9 months | 4 to 6 months |
| Ownership of data and code | Vendor | Your company |
Off-the-shelf suites remain relevant for groups above 5,000 employees with multi-country procurement. For a regional mid-market company, custom usually costs 2 to 3 times less over 5 years.
Typical 5-month plan
Month 1: workshops with buyers, mapping of the 600 suppliers, category prioritization. Months 2 and 3: build onboarding and compliance documents, migrate the supplier file. Month 4: tenders and ERP integration. Month 5: pilot with 50 strategic suppliers, then gradual rollout in waves of 150.
The key success factor is supplier adoption: a portal requiring more than 10 minutes to register sees activation cap at 40%. We aim for onboarding in under 5 minutes, with automatic reminders at day 3 and day 10.
Mini case study
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Pieter, procurement director of a food manufacturer near Amsterdam (1,200 employees), leads 8 buyers who manage 600 suppliers by email. Each buyer spends about 12 hours a week chasing documents, consolidating quotes and updating spreadsheets. The chosen portal (onboarding, compliance, tenders, Exact integration) is quoted at EUR 78,000. With 25% of time recovered for 8 buyers at 1,600 hours a year and a loaded hourly cost of EUR 60, the gain reaches 8 × 400 h × EUR 60 = EUR 192,000 per year. Even counting only half of that time actually redirected to negotiation, the project pays back in under 10 months.
FAQ
Do suppliers pay to access the portal?
No, in our approach access is free for them. Charging for registration cuts adoption by 30 to 50% among small suppliers.
How are compliance certificates handled?
The portal collects documents, checks expiry dates and sends automatic reminders 30 days before expiry. Dashboards flag any supplier above EUR 5,000 annual spend with a missing document.
Can the portal connect to SAP?
Yes, through standard APIs or IDoc files. Allow 15 to 30 development days depending on the number of synchronized objects.
How long to onboard 600 suppliers?
Usually 3 to 4 months in waves, with a 70 to 85% activation rate after two reminders. The remaining 20% are often occasional suppliers.
Where is the data hosted?
In the European Union, on AWS Frankfurt, Azure Netherlands or a European provider, in line with the GDPR.
Let's scope your project. We scope your supplier portal in two workshops: priority modules, ERP integration, indicative budget of EUR 40,000 to 100,000 and go-live in 4 to 6 months. 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.
