Creating a B2B SaaS application involves a number of challenges.
One of the challenges facing entrepreneurs and businesses is the time required to develop the application. The good news is that with the help of the right Next.js SaaS starter and the right strategy, it is possible to develop a fully functional application with a billing system in less than a day. This article will help you understand the entire process of integrating the Stripe billing system with your Next.js application. This will help you save time and weeks of development.
Why Next.js and Stripe Make the Perfect Stack for Your Next SaaS Application
Before we dive into the entire process of integrating the Stripe system with your Next.js application, it is important to understand why this combination has become the perfect combination for developing modern SaaS applications. The first thing you should understand is that a React Next.js boilerplate offers the best combination of server rendering and performance. With the help of the right Next.js starter template and the integration of the Stripe system, it is possible to develop an application that scales from your first customer to your ten-thousandth customer. The truth is that developing an application with a billing system involves a number of challenges. The challenges facing entrepreneurs and businesses include the time required and the risks associated with developing the application. The good news is that with the help of the right Next.js SaaS starter and the integration of the Stripe system, it is possible to develop an application with a billing system in less than a day.
However, not all boilerplates are equal in this regard. When it comes to selecting a Next.js boilerplate for your SaaS application, there are a number of important things that need to be taken into consideration. First and foremost, does it come with authentication? Many developers opt for Next.js Auth0 integration due to its ability to meet the complex security requirements that modern-day applications need to meet.
What Are the Best Next.js Boilerplate Options?
The best Next.js boilerplate comes with a database configuration, email configuration, and API routes already set up. These are important because it's not just about charging users for your application; it's about implementing a system that handles webhooks for subscription updates, database migration for customer storage, and email notifications for payments.
How Stripe's Architecture for Subscription Billing Works
For those who have worked with Stripe in the past, it's clear that it's been designed by developers who have a high degree of flexibility in mind. However, this flexibility comes at a cost in terms of complexity.
At its core, Stripe uses a number of important objects that need to be understood in order to get started with integration. These include Customers, Products, Prices, Subscriptions, and Payment Methods.
For a typical B2B SaaS application, you will need to create several Products that represent your application and its various plans. For example, you may have a Starter Plan, a Professional Plan, and an Enterprise Plan. Each of these plans may have a number of associated prices that represent a monthly and yearly cost. Finally, a Subscription will be created that ties a Customer to a specific Price. This allows you to have a high degree of flexibility in your application.
How to Set Up Your Development Environment
Your React Next.js boilerplate will already include most of the necessary dependencies; however, you will need to verify a few things before moving into the integration process.
You will need to ensure that you have access to your Stripe dashboard and that you have created both a test and a production API key. Security is a high priority in this case and should be kept in mind at all times.
One tool that is often overlooked by developers is the Stripe CLI. It is a powerful tool that will allow you to test webhooks locally. This is a must for a subscription-based model due to the asynchronous nature that often accompanies it.
Implementing Customer Creation and Management
The process of billing a user will start with a customer object in Stripe. For your Next.js SaaS starter template, it is generally a good idea to create a Stripe customer upon initial user registration. However, it is worth mentioning that it may be better to wait until they attempt a subscription. For a business-to-business SaaS application, it is often a better idea to create a customer as soon as possible.
You will need to ensure that your customer creation process allows you to collect some important metadata that will be helpful in later stages. You will need to keep a reference between your application's user records and Stripe's customer IDs. This will be important in later stages and will be what allows you to retrieve this information and manage it seamlessly.
Building the Subscription Flow
This is where your preparation really pays off. If you have a well-structured Next.js starter template, your subscription flow can actually be quite clean. Your users should be able to see your pricing tiers, choose their desired plan, and then provide payment information with minimal friction. Your checkout flow is critical, and every additional step or piece of confusion can hurt your conversion rates.
Stripe provides two main ways to collect payment information: Stripe Checkout and Stripe Elements. While both tools can get the job done, I recommend using Stripe Checkout for most B2B SaaS companies, especially if you're new to Stripe. That being said, if you're an established company, using Stripe Elements can provide better brand consistency.
Handling Webhooks Like a Pro
This is where many companies go wrong. Webhooks are HTTP callbacks that Stripe sends to your application to let you know about certain events, such as subscription renewal, failed payments, cancellations, etc. Stripe's developer documentation emphasizes handling webhooks, and that's because this is how your application actually stays in sync with Stripe's records.
Your webhook handler needs to be idempotent, meaning you can safely process the same webhook multiple times without creating any duplicate records or actions. This is actually quite common, especially if you're not responding quickly enough to the webhook. Stripe can actually send you the same webhook multiple times if they don't receive a response, so building your application with this in mind is critical. Also, always verify your webhook signatures to ensure you're actually receiving a webhook from Stripe.
The most important webhooks for subscription billing are customer.subscription.created, customer.subscription.updated, customer.subscription.deleted, and invoice.payment_failed. Each of these events needs special handling in the application, for example, updating user permissions, notifications, or a grace period.
Managing Subscription Lifecycle Events
When you think about subscription management, you think about payments, upgrades, downgrades, and cancellations. Your Next.js boilerplate needs to have UI components that address these issues, but how you manage them needs serious consideration. Upgrades, for example, need to determine whether you apply them immediately or next billing cycle. When you apply them immediately, you're dealing with prorating, which Stripe handles automatically if you set it up correctly. When you're dealing with downgrades, you'll want to wait until the next billing cycle to avoid any issues with refunds. Cancellations, too, have their own set of issues: do you let them use your service until their billing cycle is up, or do you terminate their subscription immediately with a prorated refund?
Implementing Usage-Based Billing
If you're building a B2B SaaS business, you're probably aware that many of them use a usage-based billing system, where your customers only use what they need to pay for. This is definitely possible using Stripe, but you'll need to think about how you're going to do this. You'll need to think about how you're going to use their metering API, how you're going to report usage, and how you're going to report that back to your customers.
The problem with usage-based billing is how you're going to manage your customers' expectations. Your customers need to see how much they're using, how much it's costing them, etc. Your TypeScript implementation needs to have error handling for reporting usage, because nothing kills trust faster than incorrect billing.
Optimizing for Failed Payments
One thing you're guaranteed to have is failed payments, whether your customer's credit card is about to expire, their bank is declining their payments, or they simply forgot to update their payment information. How you deal with failed payments is critical to your business, especially if you're using Stripe, which includes smart retries that use machine learning to determine the best time to retry payment.
Your application should also complement the automated retries provided by Stripe's API. When a payment fails, immediately notify the user and inform them how to update their payment information. A grace period should also be put in place, where access to your application remains available to them as their payment issue is being resolved. Three to seven days is a good grace period length for a B2B SaaS application. Once this grace period has passed, the account should be downgraded to a free account if this is an offering of yours, or access to your application should remain suspended while their data remains intact.
Admin Tools for Customer Support
Your support team also needs tools to help customers who are having billing issues without involving engineering. A well-designed admin tool in your Next.js boilerplate should allow support to see subscription history, issue refunds, apply credits, and manually update a subscription if needed. This can greatly help reduce support workload as well as increase overall customer satisfaction.
Security
Security is a big concern for admin tools, as billing can sometimes involve malicious activity. Implement a system of role-based access controls to make sure that only authorized people can make billing changes to a subscription. Log activity to protect your business as well as your customers in case of a refund or manual subscription update.
Testing Your Integration Thoroughly
Stripe offers a robust test mode that simulates a real-world payment experience without actually processing payments. This should be taken advantage of as much as possible. Test every subscription flow, including new subscriptions, upgrading a subscription, downgrading a subscription, cancelling a subscription, and reactivating a subscription.
Pay special attention to edge cases. What happens when a webhook arrives before your database transaction is committed? How does your system handle users that subscribe, unsubscribe, and then resubscribe within minutes? These edge cases will be happening in your production system, and it's worth finding out about them before launch to save yourself a lot of potential stress and lost revenue.
Going Live with Confidence
When you're ready to go live with your new billing system, there are a few things to consider. To start with, make sure all your environment variables reference your production API keys. Also, ensure your webhooks are correctly set up in your Stripe dashboard. You may even consider a soft launch of your new billing system by inviting a small group of users to test the new billing system before making the announcement public.
It is recommended to keep a close eye on your application for the first few days of live billing. This will help you avoid any errors in handling webhooks, payments, and subscription creations. In addition, having your alerts set up for billing errors will help you identify any potential issues at an early stage, allowing you to correct them even before they start affecting a large number of your users.
Maintaining and Scaling Your Billing System
After setting up your billing system, it is of utmost importance to keep it maintained. The Stripe API is frequently updated with new features and changes. It is recommended to keep your API versions updated by staying informed of the changes through Stripe's developer changelog.
However, as your SaaS grows, you'll find that you need new features, such as support for multiple currencies in case you want to expand your market, or perhaps you want to add support for yearly contracts with custom billing. The beauty of using a great starting point like the Next.js SaaS starter with Stripe integration is that you're just refactoring, not rewriting.
Conclusion
You don't have to wait months to implement your Stripe billing in your Next.js app. With the right starting point, the right knowledge of the Stripe architecture, and the right strategy, you can deploy a production-ready billing system in your app in less than a day.
The combination of the React Next.js boilerplate, TypeScript, and Stripe integration is the culmination of the knowledge gained from thousands of SaaS companies that have used these tools over the last few years. By using these tools, you're not just saving yourself development time; you're using tools that millions of businesses trust with billions of dollars in transactions. This is the power of using tools that are the result of the knowledge gained from the shoulders of giants, and this is the power of modern software development, especially in the SaaS space.
Top comments (1)
Solid overview, the diagram covers the parts people usually skip. One gotcha that bites after launch and rarely makes these guides: don't key your entitlement/access checks to the Stripe Price ID. The day you change pricing, Stripe correctly leaves existing subscribers on their original Price object (that's grandfathering), but any logic like price_id == price_xxx to grant access silently breaks for one of the two cohorts. Key access to the Product, or better, a tier field in product/price metadata, so a price change is a dashboard edit instead of a deploy.
Same reasoning for storing the plan/tier on your own user record (written by the webhook) rather than reading it off the live subscription every request. I run a Stripe-based SaaS and that's the one thing I wish I had designed for on day one instead of retrofitting. Good writeup.