The verdict in three sentences
In 2026, a custom member portal for a London professional association or federation costs between 25,000 and 70,000 EUR, depending on the number of modules (directory, resources, dues payment, SSO). The real return on investment isn't the website: it's automating dues reminders and ending Excel-based member management. Budget 3 to 6 months for a full portal with online payment and single sign-on.
What each module costs in 2026
A member portal is priced per functional block. Here is a 2026 order of magnitude for a project delivered in London by an experienced team.
| Module | Indicative price (EUR) | Timeline | Main impact |
|---|---|---|---|
| Directory base + member profiles | 6,000 - 12,000 | 3-4 wks | End of shared Excel file |
| Online dues payment | 5,000 - 10,000 | 2-3 wks | Automated collection |
| Automatic dues reminders | 3,500 - 7,000 | 1-2 wks | -60% secretariat time |
| Resource library (docs, videos) | 4,000 - 9,000 | 2-3 wks | Perceived membership value |
| SSO / single sign-on | 4,000 - 8,000 | 1-2 wks | Security + convenience |
| Events area + registrations | 5,000 - 11,000 | 2-4 wks | Integrated ticketing |
| Admin dashboard + exports | 4,000 - 8,000 | 2 wks | Real-time steering |
Custom portal vs association SaaS platform
Turnkey association platforms are fast but limited in customisation and billed per usage.
| Criterion | Custom portal | Association SaaS |
|---|---|---|
| Initial cost | 25,000 - 70,000 EUR | 0 - 2,000 EUR |
| Recurring cost | Hosting 40-120 EUR/mo | 30-250 EUR/mo + % transactions |
| Customisation | Total | Limited to templates |
| Fees on dues | 0 (excl. gateway) | 0.5-2.5% per transaction |
| Data ownership | 100% association | Third-party hosted |
| Business integrations | Custom (accounting, CRM) | Standard connectors |
For an association with more than 800 members collecting dues above 150 EUR/year, custom becomes profitable within 2 to 3 years thanks to saved transaction fees.
Mini case study
Sylvie, general secretary of a professional federation in London, manages 1,400 members paying 180 EUR/year, i.e. 252,000 EUR in annual dues. On a SaaS platform at 1.8% fees, she loses 4,536 EUR/year in commissions. Her secretariat spends 3 days/month on manual reminders, around 10,800 EUR/year of time.
A custom portal at 42,000 EUR with a direct gateway (0% platform commission) and automated reminders removes the 4,536 EUR in fees and 60% of the 10,800 EUR in time, i.e. 6,480 EUR saved. Total: 11,016 EUR/year. The portal pays for itself in under 4 years while offering a far better member experience.
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FAQ
How long to deliver a full member portal?
Budget 3 to 4 months for a standard portal (directory, dues, resources) and 5 to 6 months if you add SSO, events and accounting connectors. An MVP with directory and payment can ship in 6 to 8 weeks.
Can dues payment integrate with our accounting?
Yes. We connect the gateway (Stripe, GoCardless for recurring SEPA/Direct Debit) to your accounting software via API or automated export, avoiding double entry and improving reconciliation.
What does annual maintenance cost?
Budget 15 to 20% of the initial cost per year, around 4,000 to 12,000 EUR, covering security, updates, hosting and minor evolutions.
Is SSO really necessary?
If members access several tools (training, journal, forum), SSO avoids password proliferation and cuts support requests by 30 to 40%. For a simple portal, it remains optional.
Can we migrate our existing member file?
Yes, data migration from Excel, a CRM or an old platform is included in most quotes, with cleaning and deduplication. Budget 1,500 to 4,000 EUR depending on data quality.
Let's scope your project. Tell us your member count, the modules you want (dues, directory, SSO, events) and your indicative budget. 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.
