Payment Gateway Integration Services in Mumbai

Payment Gateway Integration Services for Indian Businesses

Accepting online payments in India has become more complex and more important over the past five years. The explosive growth of UPI, the regulatory requirements around payment data security (PCI-DSS), the need to handle payment failures gracefully, and the variety of payment methods Indian customers use across age groups and geographies all make payment gateway integration a non-trivial technical and commercial decision.

SSIS India integrates payment gateways into web applications, mobile apps, ERP systems and e-commerce platforms handling not just the basic payment flow but the full payment lifecycle including refunds, partial payments, payment link generation, subscription billing, recurring payments and reconciliation with your accounting system.

UPI Integration The Indian Payment Standard

UPI (Unified Payments Interface) processed over 100 billion transactions in FY2024, making it the dominant payment method in India. Any business accepting online payments in India must support UPI. We integrate UPI through payment aggregators (Razorpay, PayU, CCAvenue) that handle the technical complexity of UPI deep links, QR code generation, collect requests and payment confirmation callbacks. Our UPI integration handles the full flow: payment initiation, user authentication on their UPI app, payment confirmation, webhook handling and appropriate success/failure responses to the paying user.

Payment Gateway Options for Indian Businesses

Razorpay: The most developer-friendly payment gateway in India, with excellent documentation, a wide range of payment methods and strong support for Indian-specific features like UPI AutoPay (recurring payments), payment links, payment pages and payout capabilities. Best suited for technology companies and businesses with in-house development teams.

PayU: The market leader by transaction volume for mid-market and enterprise businesses. Strong TDR (Transaction Discount Rate) negotiations for businesses processing high volumes. Good for e-commerce and subscription businesses.

CCAvenue: Long-established gateway with wide bank support and strong relationships with Indian banks. A reliable choice for businesses where bank partnership breadth matters more than developer experience.

Instamojo: Specifically suited for small businesses, solopreneurs and educational institutions that need simple payment links without complex e-commerce infrastructure. No coding required for basic payment collection.

Payment Security and PCI-DSS Compliance

Any business handling card payment data must comply with PCI-DSS (Payment Card Industry Data Security Standard). The good news is that by integrating with a PCI-DSS compliant payment gateway and ensuring card data never touches your servers using hosted payment pages or JavaScript-based tokenisation you inherit the gateway's PCI-DSS compliance rather than needing your own certification. SSIS India implements payment integrations that are PCI-DSS compliant by design, ensuring your business is not exposed to card data security risk.

GST-Compliant Invoice Generation

Every online payment must generate a GST-compliant tax invoice automatically. SSIS India builds invoice generation into every payment gateway integration triggered by payment confirmation webhooks producing PDF invoices with all required elements: your GSTIN, customer's GSTIN for B2B transactions, HSN/SAC codes, tax breakdown (CGST/SGST for intra-state, IGST for inter-state), invoice date and sequential invoice number. These invoices are emailed to customers automatically and stored for your accounting and GST return filing.

Payment Reconciliation

Payment gateway settlement cycles (typically T+2 or T+3 days) create reconciliation challenges between orders in your system and settlements in your bank account. SSIS India builds automated reconciliation between your payment gateway reports and your accounting system matching each settled batch to the orders it covers, flagging discrepancies and generating reconciliation reports for your accounts team. This eliminates the daily manual reconciliation exercise that ties up finance staff time.

Trusted by Businesses Across Mumbai for 22 Years

SSIS India has been delivering IT solutions to businesses across Mumbai since 2002. Our client base spans every major industry manufacturing, healthcare, real estate, education, logistics, financial services, retail, hospitality and professional services. What unites all these engagements is our consistent approach: understand the business problem deeply before proposing a technology solution, implement with rigour and transparency, and support the solution long-term as the business evolves.

Our 50+ person team in Goregaon West, Mumbai brings together software developers, database architects, QA engineers, business analysts, UI/UX designers and IT infrastructure specialists all the skills needed for complex technology projects, all in-house, all accountable to you directly. No sub-contracting, no outsourcing, no surprises about who is actually doing your work.

Our project delivery track record over 500+ projects shows an on-time delivery rate consistently above 90%, a client retention rate that sees many clients working with us for a decade or more, and a post-delivery defect rate that reflects the quality of our testing process. We are not the cheapest IT company in Mumbai we are the most reliable, and for businesses where reliability matters, that distinction is worth paying for.

To discuss your IT project requirements whether it is a new software development project, a technology upgrade, a BI implementation, an AI initiative or IT infrastructure support contact SSIS India at +91-9923105711, email sales@ssisindia.com, or schedule a free consultation online.