Building a SaaS MVP: What to Build First (And What to Skip)

You have an idea for a software product. Maybe it has been rattling around in your head for months. You have seen the gap in the market, you know the pain point, and you are ready to build. The question is: what do you build first?

This is where most first-time SaaS founders go wrong. They try to build the whole vision on day one. They end up six months and $80,000 into a product that has never been used by a single paying customer. The features are polished, the onboarding is slick, and nobody wants it.

An MVP—minimum viable product—is not about building less. It is about building the right things first and proving that people will pay for them before you invest in everything else.

The Four Things Every SaaS MVP Needs

1. Authentication (The Front Door)

Users need to sign up, log in, and have their own account. This is table stakes and it is not negotiable. But here is the key: keep it simple.

What to build:

• Email/password registration and login
• Password reset via email
• Basic session management (stay logged in)

What to skip for now:

• Social login (Google, GitHub, etc.)—nice to have, not essential
• Two-factor authentication—add it later when you have users who care
• Single sign-on (SSO)—this is an enterprise feature; you are not there yet
• Custom roles and permissions—start with two roles: admin and user

Use a battle-tested auth library or service. Do not build authentication from scratch. Services like Auth.js, Clerk, or Supabase Auth handle the security-critical parts so you can focus on your actual product.

2. The Core Value Proposition (The Reason People Pay)

This is the one thing your product does that makes someone pull out their credit card. Not three things. Not five things. One thing.

If you are building a project management tool, the core value is not Gantt charts, time tracking, resource allocation, and reporting. The core value is one of those things. Figure out which one your target customer cares about most and build only that.

The litmus test: can you explain what your MVP does in one sentence? If the sentence has the word "and" in it more than once, you are building too much.

Examples of good MVP scope:

• "It lets freelancers send proposals that clients can approve with one click."
• "It tracks inventory across multiple warehouses in real time."
• "It automatically generates invoices from logged time entries."

Examples of MVP scope that is too broad:

• "It manages projects, tracks time, generates invoices, and provides analytics."
• "It is a complete platform for freelancers to manage clients, proposals, contracts, billing, and scheduling."

Build the core feature well. Make it reliable, make it fast, and make it solve the problem better than the spreadsheet your customer is currently using. That is your entire job at the MVP stage.

3. Billing (The Revenue Engine)

This is the one that first-time founders most often postpone, and it is a mistake. If your MVP does not accept payments, it is a demo, not a product. You learn nothing about whether people will pay until you actually ask them to.

What to build:

• Stripe integration with one or two pricing tiers
• A simple pricing page
• Subscription management (upgrade, downgrade, cancel)
• A basic account/billing settings page

What to skip:

• Annual billing discounts—add this when you have monthly subscribers
• Complex tiered pricing with usage limits—start flat and simple
• Coupon codes and promotional pricing—you have no audience to promote to yet
• Multiple payment methods—Stripe handles cards, that is enough

Start with two tiers: a free tier with meaningful limitations and a paid tier that removes those limitations. That is it. You can always add pricing complexity later. Right now, you need to answer one question: will anyone pay for this?

4. Basic Admin (Your Control Panel)

You, as the founder and operator, need a way to see what is happening in your product. This does not need to be fancy, but it needs to exist.

What to build:

• A user list—who signed up, when, and what plan they are on
• Basic metrics—total users, paying users, revenue (Stripe's dashboard covers most of this)
• The ability to impersonate a user account for support purposes

What to skip:

• A full admin dashboard with charts and graphs
• User analytics and behavior tracking
• Automated reporting

In the early days, you can check Stripe for revenue, check your database for user counts, and talk directly to users for feedback. You do not need a dashboard for 20 customers. You need a dashboard for 2,000. Get to 20 first.

What to Explicitly Skip

Now the hard part. Here are the features that feel important but will slow you down without teaching you anything:

Mobile app

Build a responsive web app. It works on phones already. A native iOS or Android app doubles your development time and maintenance burden for a marginal improvement in user experience. If mobile is critical to your product, use a progressive web app (PWA) approach. Build native apps after you have validated the product and have revenue to justify the investment.

Social features

Comments, activity feeds, user profiles, notifications, sharing—these are features that make sense at scale. With 15 users, there is no one to be social with. Social features are engagement multipliers, and you cannot multiply zero.

Analytics dashboards

Your users do not need charts and graphs in the MVP. They need the core tool to work. Analytics are a retention feature, not an acquisition feature. Nobody signs up for a product because of its reporting. They sign up because of the core value, and they stay because of the reporting. Build it after they sign up.

Fancy onboarding

Product tours, interactive walkthroughs, video tutorials, drip email sequences—all of these are optimization tools. They optimize a conversion funnel that does not exist yet. If your product requires a 10-step onboarding wizard to make sense, the product is too complicated for an MVP, not the onboarding.

For your MVP, the onboarding should be: sign up, see the product, start using it. If that does not work, you have a product problem, not an onboarding problem.

Integrations

Zapier, Slack, email integrations, API access—all valuable, all later. The only integration in your MVP should be Stripe for billing. Every other integration is a nice-to-have that you will build when customers ask for it. And they will ask. That is a good problem to have.

Perfection

The MVP does not need pixel-perfect design. It needs to be clean, functional, and professional—but it does not need custom illustrations, animations, or a design system. Use a component library like Tailwind or Shadcn, pick a clean color scheme, and move on. You can hire a designer after you have revenue.

The 6-8 Week Timeline

A well-scoped SaaS MVP should take 6-8 weeks to build. Here is how that time typically breaks down:

• Week 1: Project setup, authentication, database schema, basic layout
• Weeks 2-4: Core feature development—the thing that makes your product valuable
• Week 5: Billing integration, pricing page, subscription management
• Week 6: Admin basics, testing, bug fixes, deployment
• Weeks 7-8: Buffer for the unexpected, polish, landing page, launch prep

If your scope cannot fit into this timeline, you are building too much. Go back to the core value proposition and cut harder. The goal is not to build a complete product. The goal is to build enough product to learn whether people want what you are making.

The Question That Matters

For every feature on your list, ask: "Will this feature help me learn whether my product has a market?" If the answer is no, it goes on the post-MVP list. Authentication helps you learn (people have to sign up). Billing helps you learn (people have to pay). A dark mode toggle does not help you learn anything.

The MVP is not the product. It is the experiment. Build just enough to run the experiment, learn from the results, and then build the product your customers actually want—not the one you imagined in isolation.

Ship fast. Learn fast. Build what matters. Skip everything else until your customers tell you they need it.