How to Build a Subscription SaaS MVP: Features, Stack, and Timeline

Subscription SaaS is the most popular business model in software for good reason: predictable recurring revenue, compounding growth, and high customer lifetime value. But building a subscription product requires specific features — billing cycles, plan management, access control, and webhook handling — that go beyond a standard web app.

This guide covers everything you need: the essential features, the recommended tech stack, Stripe subscription integration, and a realistic timeline to launch.

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Essential Features for a Subscription SaaS MVP

Tier 1: Required for Launch

Authentication

• Email/password sign up and sign in
• Password reset via email
• Session management
• Protected routes

Subscription Billing

• Stripe Checkout for new subscriptions
• Plan selection (1-2 plans maximum for MVP)
• Webhook handling for subscription events
• Customer portal for self-service management (upgrade, downgrade, cancel, update payment method)
• Grace period handling for failed payments
• Access control based on subscription status

Core Product Feature

• Your unique value proposition (1-3 features)
• The thing users are subscribing for

User Dashboard

• Main app interface
• Subscription status display
• Settings and account management

Landing Page

• Value proposition
• Feature highlights
• Pricing section with plan details
• Sign up CTA

Tier 2: Add Within First Month

• Welcome email and onboarding flow
• Usage analytics (for you, not the user)
• Basic error tracking
• Annual billing option
• Cancellation feedback survey

Tier 3: Add Based on User Demand

• Team/multi-seat plans
• Usage-based limits and metering
• Invoice history and receipts
• Coupon/promo code support
• Multiple payment methods

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The Recommended Tech Stack

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Stripe Subscription Integration: The Complete Flow

How Subscription Billing Works

User selects plan → Stripe Checkout → Payment processed → Webhook fires →
Your app updates user status → User accesses paid features

Key Stripe Objects

Essential Webhooks to Handle

Access Control Logic

if (user.subscriptionStatus === 'active' || user.subscriptionStatus === 'trialing') {
  // Grant access to paid features
} else if (user.subscriptionStatus === 'past_due') {
  // Show warning banner + limited grace period access
} else {
  // Show upgrade prompt, restrict to free features
}

Subscription States to Handle

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Database Schema for Subscriptions

Your user table needs subscription fields:

model User {
  id                    String   @id @default(cuid())
  email                 String   @unique
  name                  String?
  password              String
  stripeCustomerId      String?  @unique
  subscriptionId        String?  @unique
  subscriptionStatus    String?  @default("inactive")
  subscriptionPlan      String?
  subscriptionPeriodEnd DateTime?
  createdAt             DateTime @default(now())
  updatedAt             DateTime @updatedAt
}

Key fields:

• stripeCustomerId — Links your user to their Stripe customer record
• subscriptionId — The active Stripe subscription ID
• subscriptionStatus — Mirrors Stripe's subscription status (active, past_due, cancelled, etc.)
• subscriptionPeriodEnd — When the current billing period ends (for "access until end of period" logic)

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The 6-Week Build Timeline

Week 1: Foundation

Week 2-3: Core Product Feature

Week 4: Stripe Subscriptions

Week 5: Polish

Week 6: Test and Launch

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Subscription Metrics to Track from Day One

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Final Thoughts

A subscription SaaS MVP has more moving parts than a simple web app — billing cycles, webhook handling, subscription states, and access control all add complexity. But the payoff is a business with predictable, growing revenue.

The fastest path: start with a SaaS boilerplate that includes Stripe subscriptions pre-built, then focus your time on the product features that make your SaaS worth subscribing to.

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Need a step-by-step checklist? Follow The MVP Development Checklist.

Choosing your pricing? Read SaaS Pricing for MVPs.

Want to build in 30 days? See How to Build a SaaS MVP in 30 Days.

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