Building a SaaS with Stripe Payments

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Building a successful SaaS requires a robust payment system. Stripe makes it easy to accept payments, manage subscriptions, and handle billing.

Setting Up Stripe

First, install the Stripe SDK:

npm install stripe @stripe/stripe-js

Create a Stripe instance on the server:

import Stripe from "stripe";

export const stripe = new Stripe(process.env.STRIPE_SECRET_KEY!, {
  apiVersion: "2024-12-18.acacia",
});

Creating a Subscription

To create a subscription, you need to:

Create a customer
Attach a payment method
Create the subscription

const subscription = await stripe.subscriptions.create({
  customer: customerId,
  items: [{ price: priceId }],
  payment_behavior: "default_incomplete",
  expand: ["latest_invoice.payment_intent"],
});

Handling Webhooks

Webhooks are essential for keeping your database in sync:

export async function POST(req: Request) {
  const body = await req.text();
  const sig = req.headers.get("stripe-signature")!;

  const event = stripe.webhooks.constructEvent(body, sig, webhookSecret);

  switch (event.type) {
    case "customer.subscription.created":
      // Handle new subscription
      break;
    case "invoice.paid":
      // Handle successful payment

Best Practices

Always use webhooks for critical business logic
Store Stripe IDs in your database
Implement proper error handling
Test with Stripe CLI locally

Product

Company

Legal

Building a SaaS with Stripe Payments

Setting Up Stripe

Creating a Subscription

Handling Webhooks

Best Practices