Most software ideas do not fail because of the idea but because of the road to it. Months go by building features nobody would have missed while the budget melts. A well-scoped MVP prevents that. Here is how building a SaaS MVP works, what it costs and what to watch for.
What an MVP is and is not
MVP stands for minimum viable product: the smallest version of your product that lets real users solve a real problem and that they would pay for. An MVP is not a clickable mock-up and not a throwaway prototype. It runs in production, customers sign up and work with it.
The key word is minimum. Everything not needed to answer the core question comes later. The core question is almost always: will people pay to have this problem solved?
The process in four phases
1. Product workshop (1 to 2 weeks)
Together we sharpen audience, core feature and pricing. The result is a prioritised list: what goes into the MVP, what goes into version two, what gets cut. Sketches of the key screens come with it.
2. Foundation (2 to 3 weeks)
Every SaaS needs the same base: sign-up, login, teams and roles, data separated per customer, subscriptions with a payment provider and an admin area. Not spectacular, but it has to be right from the start. Retrofitting multi-tenancy is expensive and risky.
3. Core feature (4 to 10 weeks)
Now the part customers pay for is built. In weekly cycles you see progress on a preview environment and give feedback. Ideally two or three pilot customers are already watching.
4. Launch and learn
The MVP goes live and first customers start. From now on data counts: who uses what, where users drop off, what they pay for. That shapes the next iteration.
What does a SaaS MVP cost?
The range is wide because products differ in complexity. As a guide:
| Scope | Typical cost | Duration |
|---|---|---|
| Lean MVP, one core feature | EUR 12,000 to 20,000 | 8 to 12 weeks |
| MVP with several roles and integrations | EUR 20,000 to 40,000 | 12 to 16 weeks |
| Marketplace or real-time platform | from EUR 40,000 | from 16 weeks |
At KSTAQ SaaS development starts at €9,999. After the product workshop you receive a fixed-price proposal for login, core feature, billing and admin area before development starts. More on the SaaS development page.
The right technology
For an MVP, boring technology is the right choice. Widely used tools such as TypeScript, React and Next.js, a PostgreSQL database and an established payment provider are mature, well documented and make it easy to hire more developers later. Exotic technology is a risk a young product does not need.
Five mistakes founders often make
- Too many features. Every feature costs time and money before you know whether anyone pays. Cut boldly.
- No payment in the MVP. Without payment you test interest, not willingness to pay.
- Neglecting the foundation. Login, permissions and data separation are hard to add later.
- No access to the code. Make sure you fully own source code and credentials. For investors this is a must.
- Building without customers. Talk to potential customers before and during development.
Frequently asked questions about a SaaS MVP
How long does it take to build an MVP?
With a clearly limited scope, plan for two to four months, as in the table above. The biggest time sink is rarely the programming but the decisions about scope and pricing. A product workshop at the start saves the most time here.
Do I have to host or maintain the MVP myself?
No. Hosting, backups and updates can be handed off. What matters is that the source code and credentials belong to you, so you can switch providers later.
What comes after the MVP?
After launch comes evaluation and expansion: which features do customers use, which do they ignore, and what are they willing to pay for? That is the basis for planning version two. If you also need a company website for the product, How much does a website cost? gives you a starting point.
Is an MVP worth it for internal tools?
If you only want to digitise an internal workflow, a web app is often the better fit. A SaaS pays off when you want to offer the same product to several customers on a subscription.
Conclusion
A SaaS MVP is realistic in two to four months if the scope stays focused on the core feature. Invest in a clean foundation and save on everything that does not prove your product is needed.
Have a product idea and want to see what an MVP could look like? Let’s talk. The intro call is free.
Sources
- What is an MVP?, Eric Ries, Lean Startup Co.
- Stack Overflow Developer Survey 2026: Technology (usage of TypeScript, React, Next.js, PostgreSQL)
The costs and timelines in the table are KSTAQ estimates, not a statistical survey.