Build Your Fintech MVP in 6 Weeks — Payments & Banking Focus
Greta builds fintech MVPs faster and cheaper than any traditional agency. Payment apps, lending platforms, budgeting tools, and neobanks — delivered in 6 weeks. PCI-DSS-aware architecture from day one.
No technical co-founder needed. No six-month timelines. No $150,000 price tags. You have the fintech idea. We build the product.
6 weeks
Typical delivery
£12k
Starting price
PCI-DSS
Aware architecture
30+
Fintech builds
What is a fintech MVP — in plain English?
Let's start with the word "fintech." It stands for financial technology. In plain English, it means any app or software that handles money — paying people, borrowing money, saving money, tracking spending, investing, or running a bank account. Think of Monzo, Revolut, Klarna, or Stripe. They are all fintech products.
Now the word MVP — Minimum Viable Product. Think of it like baking a recipe for the first time. You don't bake 200 cakes before you know if anyone likes the recipe. You bake one test cake, give it to a few friends, and ask: does this taste good? Should I add less sugar? The MVP is that test cake. It is the first working version of your idea — simple enough to build quickly, but complete enough for real people to use.
A fintech MVP is therefore the first working version of your financial product. Not the full dream with every possible feature. Just the core experience that proves your idea works. For a payment app, that means sending and receiving money. For a lending platform, that means applying for a loan and seeing a decision. For a neobank, that means opening an account, seeing your balance, and making a payment. Everything else comes after you have proven real people want to use it.
The most common mistake fintech founders make is trying to build the full product vision before testing whether anyone wants it. They spend 12 months and $200,000 building every feature — then discover users only needed 3 of them. A minimum viable product prevents that expensive mistake. Working with a specialist MVP development agency like Greta means you can test your idea in 6 weeks instead of 12 months.
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5 signs you need a fintech MVP right now
Not sure if an MVP is the right move? Here are five clear signs that building a fintech MVP is exactly what your business needs at this stage.
- 1
You are pitching investors but have no working product
Investors in fintech want to see a working product, not just slides. A 6-week MVP gives you a live demo, real user data, and a much stronger pitch deck. Founders with a working product close funding rounds faster and at better valuations.
- 2
You have an idea but no technical co-founder
Waiting 12 months to find the perfect technical co-founder is a strategy that works for very few people. Greta replaces the need for a technical co-founder at the early stage. You get a full working product without giving away 30–40% of your company to a CTO.
- 3
You are spending money on marketing before the product exists
Some founders build a waitlist, run ads, and spend on acquisition before they have anything to show users. An MVP changes this. Real users beat a waitlist every time — and real user feedback beats all the market research in the world.
- 4
You have been in 'planning mode' for more than 3 months
Planning is important. Six months of planning is a red flag. If you are still mapping user journeys, debating tech stacks, and writing specs after 3 months, you need to build something. The fastest way to learn is to put something real in front of real users.
- 5
A competitor just launched something similar
Speed to market matters in fintech. If a competitor has just launched a product that looks like your idea, you need to move fast. A 6-week MVP from Greta gives you a working product in the market while your competitor is still on version one.
BUILD IT FAST
Ready to build your fintech product?
Greta builds fintech MVPs in 6 weeks — PCI-DSS-aware and compliance-ready from day one.
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Not sure where to start?
Book a 20-minute call. We'll map out your scope, tech stack, and go-to-market plan — for free.
What fintech products does Greta build?
We have built fintech products across every major category. Here are the 6 types of financial products we build most often — all delivered using our AI-powered MVP development platform.
Payment apps
Peer-to-peer payments, split bills, payment request links, and merchant payment tools. We integrate Stripe and open banking APIs (think of open banking as a way to let your app read someone's bank balance and history with their permission — like giving a trusted accountant a read-only view of your statements). Delivered in 4–5 weeks.
Neobanks and challenger banks
Digital-first current accounts, card issuance (virtual and physical), transaction history, and spend insights. Built on Banking-as-a-Service providers like Railsbank or Modulr — these are companies that hold the banking licence so you don't have to. Delivered in 6–8 weeks.
Budgeting and personal finance
Spend tracking, savings goals, bill reminders, and open banking data aggregation. Clear dashboards that make money simple to understand. We pair these with a custom reporting dashboard for the product team. Delivered in 4–6 weeks.
Lending platforms
Loan application flows, affordability checks (software that verifies a borrower can repay), repayment schedules, and lender dashboards. Designed around FCA consumer credit requirements. Delivered in 6–8 weeks.
Investment platforms
Portfolio tracking, automated investing (robo-advice — software that manages investments automatically based on your goals), fractional shares, and ISA wrappers. Designed with FCA investment regulations in mind. Delivered in 6–8 weeks.
Expense management tools
Business expense submission, approval workflows, receipt capture via phone camera, and accounting software integrations. Popular with SMEs and remote teams. Often paired with a custom analytics dashboard. Delivered in 4–6 weeks.
Also interested in insurtech? See our insurtech MVP development page. Building B2B financial software? See our B2B SaaS MVP development page.
Real examples: what Greta has built in fintech
These are representative examples of fintech products Greta has built. Names changed for client confidentiality.
ClearPay Pro
B2B Payment Reconciliation ToolBuilt in 5 weeksA former finance director turned founder
The problem
Her accounting clients were spending 8 hours a week manually matching payments to invoices across 3 different bank accounts. There was no software that automated this for small accountancy firms.
What Greta built
Greta built a web app that pulls bank transaction data via open banking API, matches payments to outstanding invoices automatically, and flags mismatches for human review. It included a custom reporting dashboard showing reconciliation status at a glance.
The outcome
Launched to 12 accounting firms in week 6. Reduced reconciliation time from 8 hours to 45 minutes. Raised a £250,000 pre-seed round 8 weeks after launch using the product as a live demo.
Volta
Green Energy Financing PlatformBuilt in 7 weeksA solar panel installer with 200 clients who couldn't afford upfront costs
The problem
Customers wanted solar panels but not the £8,000 upfront cost. Existing financing options were slow (2–3 week approvals) and generic. He wanted to offer instant financing directly through his own branded app.
What Greta built
Greta built a white-label lending platform. Customers apply for financing on their phone in under 5 minutes. An affordability check (automated credit assessment tool) gives an instant decision. Repayment is collected monthly by direct debit. The installer gets paid in full immediately.
The outcome
Conversion rate on £8,000+ installations increased by 40%. The platform was also licensed to 3 other solar installers within 4 months, creating a second revenue stream.
Stackr
Gen Z Savings and Investing AppBuilt in 6 weeksTwo former banking analysts aged 26 and 28
The problem
Young people in their 20s weren't using traditional savings accounts or investment apps because they felt boring, confusing, and designed for 50-year-olds. The founders wanted to build something that felt like a game but with real money.
What Greta built
Greta built a mobile app with a gamified savings system — users set goals (a holiday, a laptop, a first car) and Stackr rounds up card purchases automatically to contribute to each goal. A basic investment feature let users put spare change into a managed fund with one tap.
The outcome
2,400 signups in the first 30 days via TikTok-led launch. Average user saved £47 per month passively. Used to close a £500,000 seed round from two angel investors.
Common mistakes fintech founders make when building an MVP
We have worked with dozens of fintech founders. Here are the 5 most common mistakes we see — and how to avoid them.
- ✕
Building too many features before testing the core one
The most common mistake of all. A founder says: 'I just need to add open banking, a robo-advisor, a crypto wallet, and a social feed and then it will be ready to launch.' None of those features are needed to test the core idea. Build the one thing your product does best. Test it. Everything else is a distraction at this stage.
- ✕
Ignoring compliance until the last week
Fintech is regulated. If your product handles payments, lending, or investments, there are legal rules you must follow. Discovering you need FCA authorisation or PCI-DSS compliance in week 10 of an 8-week build is expensive. Greta maps compliance requirements in week 1, not week 10.
- ✕
Using no-code tools for a product that needs real security
No-code tools like Bubble or Webflow are excellent for content sites and simple SaaS apps. They are not suitable for fintech products that handle card data, personal financial information, or regulated activities. The security and compliance requirements of fintech need a properly engineered product — not a drag-and-drop builder.
- ✕
Hiring a generalist agency instead of a fintech specialist
A general web development agency that 'also does fintech' does not know the difference between a PCI-DSS Level 1 and Level 4 merchant. They will not know what a BaaS provider is. They will not know how open banking APIs work or what FCA regulatory perimeter means. Fintech has a steep learning curve. Working with a specialist agency means you do not pay for their education.
- ✕
Waiting until the product is 'perfect' to launch
Perfection is the enemy of learning. Every week you delay launching is a week you do not have real user data. Real user data is worth more than any internal testing, wireframe review, or focus group. Ship the MVP. Learn. Improve. Repeat. A working product in users' hands always beats a perfect product that only exists in your head.
Fintech compliance — what you need to know before you build
Fintech is one of the most regulated software categories. Before you build, you need to know which rules apply to your product. Greta reviews compliance requirements at the start of every MVP build. Here are the three you will almost certainly encounter.
Payment Card Industry Data Security Standard
Who it applies to: Any product that accepts, processes, stores, or transmits credit or debit card data
Plain English: If your product touches card numbers, you must follow PCI-DSS rules about how that data is stored and transmitted. Most MVPs reduce their PCI scope to near-zero by using Stripe or similar processors that handle card data on your behalf — like hiring a secure vault instead of building one yourself.
What Greta does: Greta integrates Stripe or equivalent processors by default, keeping your PCI-DSS scope minimal. We implement the technical controls your compliance team requires.
Financial Conduct Authority (UK)
Who it applies to: UK products that provide regulated financial services — lending, investment, payment initiation, or account aggregation
Plain English: Some fintech products require FCA authorisation before they can launch. Others can operate under the umbrella of a regulated partner. Getting this wrong is expensive — it is worth checking early. Think of FCA authorisation like a driver's licence: you cannot legally drive on UK roads without one, but you can take lessons in a car with a qualified driver first.
What Greta does: Greta identifies FCA authorisation requirements at discovery. We build your product to meet the technical standards your FCA compliance consultant specifies.
General Data Protection Regulation
Who it applies to: Any product with users in the European Union
Plain English: Financial data is sensitive personal data under GDPR. You need a clear legal reason to collect it, users can request deletion at any time, and you must store it securely. Fines for breaches can be up to 4% of global annual revenue. In fintech terms, this means encrypting all financial records, implementing consent flows, and having a documented data deletion process.
What Greta does: Greta implements consent management, data deletion workflows, encrypted storage, and privacy policy generation for GDPR compliance on every build.
Building an app that deals with insurance claims or premiums? Read our insurtech MVP development guide for sector-specific compliance details.
BUILD IT FAST
Compliance handled. Let's build.
PCI-DSS-aware architecture, FCA-ready data flows, and GDPR compliance — built in from day one, not bolted on later.
TALK TO A FOUNDER
Not sure where to start?
Book a 20-minute call. We'll map out your scope, tech stack, and go-to-market plan — for free.
How Greta builds your fintech MVP — step by step
Our process is designed to be fast, transparent, and free of surprises. Here is exactly what happens from your first call to launch day.
- 01
Discovery call — 1 hour, free
We learn your fintech idea, your target users, and your market. We identify which compliance requirements apply — PCI-DSS, FCA, GDPR — before a single line of code is written. This call costs you nothing and takes one hour. Book it at /contact/.
- 02
Compliance mapping and scope
We map exactly what to build and document the regulatory requirements. You get a written scope with a fixed price and a fixed timeline — not a vague estimate that triples later. Most clients have a written scope within 48 hours of the discovery call.
- 03
Design and prototype — 3 to 5 days
Clickable mockups (an interactive preview you can tap through on your phone or computer, like a demo version before anything is real) let you see and feel your fintech product before anything is built. You test onboarding, payments, and dashboards, then give feedback. Changes at this stage take hours, not weeks.
- 04
Build — 4 to 5 weeks
Our AI-assisted platform builds your fintech MVP. PCI-DSS-aware data handling from day one. You get weekly updates, a private staging environment to review progress, and direct communication with the build team.
- 05
Testing and compliance review
We run full QA (quality assurance — systematic checking that everything works as expected) testing across all user flows and compliance touchpoints. Payment flows, KYC journeys, data handling, and consent management are all reviewed before launch.
- 06
Launch and handover
Your fintech product goes live. You get full code ownership — the code is yours, not ours. You also get technical documentation and a handover call. We help you plan the next phase based on real user feedback from your first 30 days.
Interested in building a mobile version of your fintech product? See our mobile app MVP development page.
Fintech MVP cost comparison — 2026
The cost of building a fintech MVP varies widely depending on complexity, compliance requirements, and who you choose to build with. Here is an honest comparison for 2026. The price differences are real — and the reasons behind them matter.
| Option | Cost | Timeline | Compliance |
|---|---|---|---|
| Traditional agency | $100,000–$250,000 | 6–12 months | Extra cost |
| Freelancer team | $25,000–$70,000 | 3–9 months | You manage it |
| No-code tools | $0–$1,000/month | Weeks | Very limited |
| Greta | From £12,000 | 6 weeks | Included |
Prices are indicative ranges for a typical fintech MVP with 3–5 core features and standard compliance requirements. Complex enterprise products may cost more. Book a free call for an exact price.
Do you also need a finance dashboard?
Most fintech products need a back-office dashboard — a place where your team can see transactions, review applications, monitor fraud signals, and manage users. Greta builds both the customer-facing fintech product and the internal operations dashboard in a single engagement. See our finance dashboard development page for what this typically includes — or explore our custom dashboard development service for the full picture.
BUILD IT FAST
Seen enough? Let's scope your fintech MVP.
Tell us your fintech idea — we'll map the scope, compliance checklist, and timeline in one free 30-minute call.
TALK TO A FOUNDER
Not sure where to start?
Book a 20-minute call. We'll map out your scope, tech stack, and go-to-market plan — for free.
Fintech MVP development — common questions answered
What is a fintech MVP?+
A fintech MVP is the first working version of a financial technology product. MVP stands for Minimum Viable Product — the simplest version of your idea that real users can actually use. Think of it like a test drive of a car. You don't need the sun roof, the heated seats, or the premium sound system to know if the car is right for you. You need the engine, the steering wheel, and the brakes. A fintech MVP gives your users those essentials. For a payment app, that means sending and receiving money. For a lending platform, that means applying for a loan and seeing a decision. The full feature set comes after you've proven people want the core product.
How long does it take to build a fintech MVP?+
With Greta, most fintech MVPs are delivered in 6 weeks. Simple payment or budgeting apps can be done in 4–5 weeks. More complex lending platforms or neobanks with full KYC (identity verification) and compliance flows take 6–8 weeks. Traditional agencies typically take 6–12 months for the same scope. The difference is our AI-assisted development platform — it does not replace human expertise, but it eliminates the repetitive code-writing that slows traditional development down.
Do you handle PCI-DSS compliance?+
Greta builds with PCI-DSS-aware architecture from day one. PCI-DSS is the security standard that applies to any product that handles card payments. We integrate Stripe or equivalent payment processors who handle card data storage and transmission — which reduces your PCI-DSS scope to near zero. Think of it like this: instead of building your own secure vault for card data, we connect you to a company that is already the most trusted vault in the world. We implement the technical controls your compliance team specifies. We do not provide legal advice, but we implement the technical requirements your lawyers and compliance officers define.
What fintech products does Greta build?+
Greta builds payment apps, lending platforms, budgeting and personal finance tools, neobanks, crypto wallets, investment platforms, expense management tools, insurtech products, and fintech dashboards. We build for both B2C consumer fintech and B2B financial SaaS. If you are building a B2B financial product, also see our B2B SaaS MVP page.
How much does a fintech MVP cost?+
Traditional agencies charge $100,000–$250,000 for a fintech MVP. Freelancer teams cost $25,000–$70,000 but require significant founder management time. Greta delivers the same quality starting from £12,000 because we use our own AI-assisted development platform instead of large teams of developers. You get a fixed price before we start — no surprises, no scope creep charges. Book a free call and we will give you a real price within 48 hours.
Do I need a technical co-founder to build a fintech MVP?+
No. Greta works with non-technical founders every day. You bring the business idea, the domain knowledge, and the understanding of your target users. We bring the technical skills, the compliance knowledge, and the build platform. You do not need to know what an API is (though we will happily explain — it is basically a waiter between two software systems, passing messages back and forth). You do not need to hire a CTO before you start. Dozens of Greta clients have launched fintech products without a single technical person on their founding team.
What is KYC and does Greta handle it?+
KYC stands for Know Your Customer. It is the process of verifying the identity of your users before letting them use your financial product. Think of it like the ID check at a bank branch — but automated and digital. A user uploads a photo of their passport or driving licence, takes a selfie, and software confirms they are who they say they are in seconds. KYC is legally required for most regulated fintech products. Greta integrates with established KYC providers like Jumio, Onfido, or Stripe Identity to handle identity verification flows within your MVP. You do not build KYC from scratch — you connect to a trusted provider. This is faster, cheaper, and more reliable.
Can Greta build a fintech mobile app?+
Yes. Greta builds mobile fintech apps for iOS and Android using React Native — one codebase that runs on both platforms. This cuts development time in half compared to building separate native iOS and Android apps. Most fintech MVPs start as either a web app (accessible from any browser) or a cross-platform mobile app (works on iOS and Android), then add a dedicated native app after product-market fit is proven. We advise on the right starting point for your specific product, user base, and timeline. See our mobile app MVP development page for more detail.
Sources & citations
Official documentation and authoritative research cited on this page. All external links open in a new tab.
FCA Fintech Regulatory Sandbox
UK Financial Conduct Authority's regulatory sandbox programme for innovative financial services companies. Covers authorisation requirements, regulatory perimeter, and approved firm lists.
PCI Security Standards Council
Official PCI-DSS standards documentation and compliance guidance for payment card data security. Includes merchant level definitions, technical requirements, and the 12 core PCI-DSS requirements.
Stripe Developer Documentation
Stripe's official payment processing and PCI-DSS compliance documentation for developers. Explains how using Stripe reduces merchant PCI-DSS scope and what remains the merchant's responsibility.
CB Insights — State of Fintech Report
Annual fintech industry research covering global investment trends, top emerging fintech companies, category breakdown, and market size data. Used for market context on this page.
Related services
Explore these related pages to find the exact service that matches your product.
MVP Development Agency
Our main MVP development service for all product types and industries.
Insurtech MVP Development
Build insurance technology products — claims, policies, and broker platforms.
B2B SaaS MVP Development
Build B2B financial software-as-a-service products in 6 weeks.
Mobile App MVP Development
Build iOS and Android fintech apps using React Native in 6 weeks.
Finance Dashboard Development
Custom financial operations and reporting dashboards for fintech teams.
Fintech Solutions Hub
Full guide to Greta's fintech build services across all categories.
Build your fintech product in 6 weeks with Greta.
You have the fintech idea. We have the platform, the compliance knowledge, and the 6-week track record. PCI-DSS-aware architecture and regulatory readiness built in from day one. Real product, real users, real results — in weeks, not months.
Already know what you want to build? Book a free call today and get a fixed price within 48 hours. Or explore our full fintech solutions page to see the complete range of products we build.
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