The verdict in three sentences
For a microfinance institution (MFI) with a London head office or London-based funders, a serious institutional website built by a London agency costs GBP 20,000 to 45,000 and ships in 10 weeks. Three building blocks justify that budget: a loan calculator showing the APR, a map of around 25 branches and secure hosting behind a WAF. A cheap GBP 5,000 site meets neither the transparency standards of impact investors nor the security reviews of development finance institutions.
What funder transparency standards require on the site
Impact investors and DFIs increasingly expect MFIs to follow client protection standards such as the Client Protection Pathway, and to disclose pricing and governance clearly. The website becomes the public proof of that transparency.
| Content | Requirement or good practice | Update frequency |
|---|---|---|
| Interest rates and APR | Clear display per product, effective rate shown | At every pricing change |
| Fees schedule | Arrangement fees, account fees, penalties | Quarterly |
| Audited annual accounts | Balance sheet and income statement after approval | Annual |
| Licence and regulator | Licence number, regulator in each country | On change |
| Branch network | Address, opening hours, phone, geolocation | Monthly |
| Complaints handling | Procedure, response time, escalation contact | Annual |
| Data protection | UK GDPR and local data laws in operating countries | Annual |
Best practice is to manage this content in a back office with an approval workflow: compliance validates, management publishes. That prevents a wrong rate staying online for weeks.
Detailed budget with a London agency in 2026
Here are 2026 ballpark figures for an MFI with around 25 branches across one or two countries.
| Work package | Content | Budget (GBP, excl. VAT) |
|---|---|---|
| Discovery and UX | Workshops, sitemap, mobile wireframes | 2,500 to 4,500 |
| Design and build | 25 to 35 pages, design system, headless CMS | 6,000 to 13,000 |
| Loan calculator | Repayments, APR, several products | 3,000 to 6,500 |
| Branch map | 25 geolocated branches, city filters | 1,500 to 3,500 |
| Publications hub | Annual reports PDF, press releases, archive | 1,500 to 4,000 |
| Security and hosting year 1 | WAF, CDN, backups, monitoring | 3,500 to 8,000 |
| Training and acceptance | Team training, testing, go-live | 2,000 to 5,500 |
| Total | 20,000 to 45,000 |
The calculator is the most strategic item. It must use the credit team's exact formulas, display the APR and state that it is a non-binding simulation. Any gap between the calculator and the real offer at the branch creates complaints.
Security: why a WAF is not optional
MFIs are frequent targets for phishing: fake sites, fake loan forms, brand impersonation on WhatsApp. The official site must be technically beyond reproach.
| Measure | Role | Estimated annual cost (GBP) |
|---|---|---|
| Managed WAF | Filters application attacks and bots | 1,200 to 3,000 |
| CDN with DDoS protection | Availability despite peaks and attacks | 800 to 2,000 |
| OV or EV SSL certificate | Verified identity of the institution | 150 to 500 |
| Daily backups | Restore in under 4 h | 400 to 900 |
| Brand monitoring | Detection of fake sites and pages | 800 to 1,800 |
Add strict CSP headers, two-factor authentication for CMS editors and a penetration test before go-live. DFIs and impact funds increasingly request this evidence during due diligence.
Mini case study
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
David, COO of an MFI network headquartered in London with 25 branches in East and Central Africa, runs a call centre handling about 1,200 calls a month asking for rates, opening hours or a loan simulation. Each call costs about GBP 3 in agent time.
He commissions a GBP 32,000 site with calculator and branch map. After 6 months, 40% of these requests are handled online, which means 480 calls avoided per month and GBP 1,440 saved monthly. On that line alone the site pays back in about 22 months, before counting the qualified loan requests generated by the calculator and the time saved in funder reporting.
FAQ
How long does an MFI website take to deliver?
Plan 10 weeks, including 2 weeks of discovery with compliance. The loan calculator alone takes 2 to 3 weeks of development and testing.
Is the institution bound by the loan calculator result?
No, if it is clearly presented as a non-binding simulation. It must still use current pricing grids and display the APR, otherwise it exposes the MFI to complaints.
Where should the site be hosted?
Hosting in the UK or EU with a CDN is common and simplifies UK GDPR compliance, but local data laws in operating countries still apply to collected data. Budget GBP 3,500 to 8,000 a year for hosting with WAF and monitoring.
Can a customer portal be added later?
Yes, provided the architecture is modular from the start. A portal connected to the core banking system is a separate project, typically GBP 30,000 to 80,000.
What maintenance budget should we plan?
Plan GBP 600 to 1,500 a month for maintenance, security updates and minor changes. That is roughly 25 to 50% of the initial cost spread over 3 years.
Let's scope your project. We scope your MFI institutional website with loan calculator, branch map and WAF security, for an indicative budget of GBP 20,000 to 45,000 and a 10-week timeline. 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.
