Billing Integration for SaaS: Stripe, Paddle, Chargebee, Subscription Management, and Dunning
Billing is the least glamorous part of running a SaaS business, but getting it wrong means lost revenue, angry customers, and tax headaches. Here is how to choose and implement a billing stack that scales.
Stripe: The Developer Favorite
Stripe is the default choice for most SaaS startups. Its API is well-documented, its SDKs cover every major language, and it handles the subscription lifecycle including prorations, upgrades, downgrades, and cancellations.
The pricing is 2.9% plus 30 cents per successful charge, with volume discounts available above $1 million in annual volume. Stripe also offers Stripe Tax, which automatically calculates and remits sales tax in jurisdictions where you have nexus.
Stripe Billing adds subscription management features: metered billing, tiered pricing, and usage-based billing. For a solo founder or small team, Stripe Billing plus Stripe Tax covers all your needs without third-party tools.
The main downside is that Stripe does not handle VAT or global tax compliance as thoroughly as specialized processors. If you sell to EU consumers, you will need to manage VAT MOSS registration yourself or use Stripe Tax.
Paddle: Tax Compliance as a Service
Paddle positions itself as a merchant of record. When you use Paddle, it becomes the seller of record for your transactions. It handles VAT, sales tax, GST, and remittance globally. You receive a single payout net of all taxes and fees.
This is enormously valuable for solo developers and small teams. Tax compliance across dozens of jurisdictions is complex and expensive. Paddle charges a flat 5% plus 50 cents per transaction, which is higher than Stripe but includes tax handling.
Paddle also offers subscription management, checkout pages, and fraud protection. Its API is less developer-friendly than Stripe but has improved significantly.
The trade-off is that customers see "Paddle" on their credit card statements, which can cause confusion. And some customers prefer direct relationships with the merchant.
Chargebee: Subscription Management Layer
Chargebee is not a payment processor but a subscription management platform that sits on top of Stripe, Braintree, or other gateways. It handles recurring billing, invoicing, revenue recognition, and dunning.
Chargebee shines in complex billing scenarios. If you offer annual plans with quarterly payment options, usage-based add-ons, and tiered pricing with overage charges, Chargebee makes this manageable without custom code.
It integrates with accounting tools like QuickBooks and Xero, which saves hours of manual reconciliation each month. Pricing starts around $600 per year for early-stage plans.
Subscription Management Best Practices
No matter which provider you choose, follow these practices. First, handle proration transparently. When a customer upgrades mid-cycle, calculate the difference and charge or credit accordingly. Surprise charges erode trust.
Second, offer multiple billing frequencies. Monthly, annual, and quarterly. Annual plans should offer a discount of 15-20% to incentivize commitment. Annual customers have lower churn and lower processing costs.
Third, implement metered billing carefully. Usage-based pricing is popular but can lead to bill shock. Send usage alerts at 50%, 80%, and 100% of typical usage. Let customers cap their spending.
Dunning Strategies
Dunning is the process of recovering failed payments. Credit cards fail for many reasons: expired cards, insufficient funds, or bank blocks. Without dunning, you lose customers who want to pay but cannot.
A good dunning workflow is: retry immediately on failure. Retry again after 3 days. Retry again after 7 days. Email the customer after each failure with a link to update their payment method. After 14 days, downgrade to a free tier or suspend access.
Automated dunning can recover 10-20% of otherwise lost customers. Over a year, this is significant revenue. Stripe Billing, Paddle, and Chargebee all include dunning features.
Choose the simplest billing stack that meets your tax and complexity needs. Start with Stripe alone. Add Chargebee when subscription complexity grows. Consider Paddle if global tax compliance is overwhelming. The key is getting paid reliably while keeping the implementation simple enough to maintain.