Stripe Subscriptions in Next.js: Build Recurring Billing for Your SaaS

Monetizing your SaaS requires a reliable subscription system. Stripe is the industry standard, but setting it up in a Next.js app can be intimidating. Zero to SaaS simplifies this by guiding developers step by step to create a complete recurring billing system.

Step 1: Configure Stripe

• Create a Stripe account
• Set up API keys for test and live environments
• Define subscription plans with pricing tiers

This foundation ensures you can handle real payments securely.

Step 2: Implement Checkout Flow

• Use Stripe Checkout or Elements for frontend payments
• Connect checkout sessions to your Next.js API routes
• Redirect users after successful payment
• Handle cancellations and upgrades

A seamless checkout improves conversion and reduces friction.

Step 3: Connect Stripe with MongoDB

You need to track subscriptions and users in your database:

• Store Stripe customer IDs and subscription status
• Update MongoDB when payments succeed or fail
• Sync billing info with user accounts

This ensures your SaaS can respond to subscription changes dynamically.

Step 4: Handle Webhooks

Stripe sends events when payments succeed, fail, or subscriptions change:

• Create Next.js API routes to handle webhooks
• Verify signatures to ensure security
• Update user data and trigger notifications

Webhooks keep your app in sync with Stripe in real time.

Step 5: Display Subscription Status in Dashboard

Show users:

• Current plan and renewal date
• Payment method and history
• Options to upgrade, downgrade, or cancel

This transparency builds trust and reduces support requests.

Step 6: Testing and Deployment

• Test with Stripe’s test cards
• Check webhooks and API routes
• Deploy to Vercel with environment variables

Pro Tips

• Always test webhooks in a staging environment
• Use reusable API functions for Stripe integration
• Keep subscription logic separate from business logic
• Notify users of payment events via email

Closing CTA

Stripe subscriptions are essential for recurring revenue in SaaS. Zero to SaaS guides you through every step, from checkout to webhooks, so your Next.js app is ready to accept paying users.

Recommended next reads:

• Build SaaS with Next.js and Stripe
• Zero to SaaS with Next.js, Tailwind, and Stripe