// build_guide
// How to build Subscription Billing & Dunning Management SaaS for Indian B2B Companies
Billing SaaS requires robust financial data handling, compliance with Indian regulations, and reliable payment processing. PostgreSQL ensures ACID compliance for financial transactions while React provides scalable admin interfaces for complex billing workflows.
Complexity 8/10SaaS
// recommended_stack
FrontendReact.js with TypeScript
BackendNode.js with Express
DatabasePostgreSQL with Redis caching
AuthAuth0 or Firebase Auth
HostingAWS or DigitalOcean
ExtraStripe/Razorpay integration
ExtraEmail service (SendGrid)
ExtraPDF generation
ExtraWebhook handling
// cost_and_timeline
USD min
$12,000
USD max
$18,000
INR min
₹10.0L
INR max
₹15.0L
Typical SaaS projects cost $1,800–$5,000 USD and take 6–8 weeks with an Indian dev team. See the full cost guide →
// timeline_breakdown
2 weeksDiscovery & Design
8 weeksCore Development
3 weeksPayment Integration & Testing
1 weekDeployment & Launch
// mvp_features[]
## What to build in the MVP
-User authentication and role-based access
-Customer management dashboard
-Basic subscription plan creation
-Invoice generation and tracking
-Payment integration (Razorpay/Stripe)
-Failed payment retry logic (basic dunning)
-Email notifications for payment events
-Admin panel for billing oversight
// risk_flags[]
## Engineering risks to plan for
!Financial compliance complexity may exceed timeline expectations
!Payment gateway integration testing requires extensive edge case handling
!Dunning management logic is complex and may need iterative refinement
!Early budget may be insufficient for production-ready billing system
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// related_resources