The verdict in three sentences
A London fintech should treat its corporate website as a regulated communication channel as much as a marketing asset: product pages, fees and risk warnings fall under the FCA financial promotions rules and the Consumer Duty. A realistic budget ranges from GBP 25,000 for an early-stage firm to GBP 120,000 for a scale-up with product calculators, multi-step compliance sign-off and penetration testing. Plan for 3 to 5 months from scoping to launch, compliance review included.
What the website must show
FCA-authorised firms, and firms whose promotions are approved by an authorised person, must keep online communications fair, clear and not misleading. Since 2023, the Consumer Duty adds a focus on consumer understanding and outcomes.
| Content | Requirement or practice | Update frequency |
|---|---|---|
| Regulatory status and FCA firm reference number | Mandatory disclosure | One-off, checked yearly |
| Fees and charges | Clear, prominent, Consumer Duty | Whenever fees change |
| Representative APR for credit products | Consumer Credit sourcebook | Quarterly |
| Risk warnings (investments, crypto) | Financial promotions rules | Per product |
| Complaints procedure and Financial Ombudsman Service | Mandatory information | One-off |
| Privacy and cookie notices | UK GDPR, PECR | Yearly |
| Annual accounts and investor information | Governance, investor expectations | Yearly |
Compliance must approve every financial promotion before publication. A CMS with a two-step approval workflow (editor, then compliance) and an audit trail avoids an unapproved rate going live.
Budget and features in GBP
| Package | Scope | 2026 price | Timeline |
|---|---|---|---|
| Early stage | 15 to 20 pages, fees, regulatory disclosures, contact form | GBP 25,000 to 40,000 | 3 months |
| Growth | + loan or savings calculator, CMS with approval workflow, multi-language | GBP 45,000 to 75,000 | 4 months |
| Scale-up | + online application start, investor relations area, security audit | GBP 80,000 to 120,000 | 5 months |
| EV or OV SSL certificate | Extended or organisation validation | GBP 150 to 400 a year | 1 to 2 weeks |
| External penetration test | Before launch then yearly | GBP 6,000 to 15,000 | 2 to 3 weeks |
| Maintenance and 24/7 monitoring | Updates, backups, alerts | GBP 1,500 to 4,000 a month | Ongoing |
The calculator is often the most visited page: it must show the rate, term, monthly payment and total cost, with a clear statement that results are illustrative. It must also stay accessible and work on slow mobile connections.
Security and hosting
A fintech brand is a phishing target: cloned sites appear regularly. Good 2026 practice includes strict security headers (CSP, HSTS), DDoS protection, strong authentication for CMS access, monitoring of look-alike domains and a "Fraud alert" page explaining how to spot fake sites and messages. The corporate website must stay separate from the app and customer platform, so a flaw in one does not expose the other.
Mini case study
Oliver Grant, head of marketing at a London lending fintech, sees about 2,500 support contacts a month asking about rates, eligibility and fees. A Growth package at GBP 60,000, calculator included, targets a 30% reduction, or 750 fewer contacts. At 7 minutes per contact and a loaded cost of GBP 30 per agent hour, that frees 87 hours a month, about GBP 2,600. More importantly, the calculator can drive 400 qualified application starts a month: with a 25% approval rate and GBP 120 net margin per loan, that is GBP 12,000 of monthly margin. The site pays back in about 5 months, a 2026 estimate.
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FAQ
How much does a fintech corporate website cost in London in 2026?
From GBP 25,000 to 40,000 for an early-stage firm, up to GBP 120,000 for a scale-up with calculators, application flows and security audits.
Does the FCA approve websites before launch?
No, but every financial promotion must be approved internally by an authorised person, and the FCA can require changes or withdrawal. Budget 1 to 2 weeks for compliance review.
Is an EV SSL certificate necessary?
It is not mandatory and browsers no longer highlight it, but some firms keep it for brand assurance at GBP 150 to 400 a year.
Why a 3 to 5 month timeline?
Gathering fee schedules, compliance and leadership sign-off, then penetration testing often take longer than development, which runs 6 to 10 weeks.
Can we start loan applications on the website?
Yes, from the Scale-up package. The form passes data to the lending platform with encryption, explicit consent and a clear handover to the regulated application journey.
Let's scope your project. Tell us your products, required calculators and compliance constraints: we will scope a build between GBP 25,000 and 120,000, delivered in 3 to 5 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.
