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A Step-by-Step Guide to Payment Gateway Integration for Startups

Payomatix TeamMarch 31, 20257 min read

Step 1 — Pick Your Methods

Don't try to support everything on day one. Identify the top 2–3 methods your customers actually use (cards + UPI in India; cards + Apple Pay in the US).

Step 2 — Choose Hosted vs Direct

Hosted checkout is fastest (PCI scope reduced, weeks of work saved). Direct API gives you control. Most startups should start hosted.

Step 3 — KYB & Onboarding

Have your incorporation docs, bank account, and director KYC ready. Most providers approve in 2–5 business days.

Step 4 — Sandbox Integration

Wire up the SDK, handle the success and failure callbacks, and store the transaction ID against your order. Build webhook handlers before going live.

Step 5 — Go Live

Run 5–10 real low-value transactions, verify settlement, then open the floodgates.

Why Payomatix for Startups

Zero setup fee, transparent per-transaction pricing, 24-hour onboarding, and a single integration that covers cards, UPI, wallets, and net banking.

Ready to level up payments?

Talk to our team about how Payomatix can help your business.

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