Payment Gateway Integration Solution for Smooth Online Payments
Let customers pay you by UPI, card, net banking or wallet on your website, app, booking page or invoice link. We help you choose a gateway, complete the set-up and test every payment path.
What is payment gateway integration and how does a business start accepting online payments?
Payment gateway integration connects your website, app or billing system to a licensed payment provider so customers can pay by UPI, card, net banking or wallet. The business completes KYC with the provider, the gateway is added to checkout, and payments are confirmed back to your system. Money settles to your bank account after the provider's settlement cycle.
Key takeaways
- A gateway lets customers pay by UPI, cards, net banking and wallets.
- You need a business bank account and KYC documents to get approved.
- Integration covers checkout, confirmation, refunds and reports.
- Payment links and QR codes work even without a website.
- Testing every success, failure and refund path is essential.
- Fees are charged by the gateway; our set-up is quoted separately.
What is payment gateway integration?
Payment gateway integration is the work of connecting your website, app or software to a payment provider, so online payments are taken safely and confirmed back to your system.
When a customer clicks 'Pay', the gateway shows payment options, processes the payment with the bank or UPI network and tells your website whether it succeeded. Your system then marks the order as paid, sends a receipt and starts delivery.
Good integration is more than a 'Pay' button. It handles failed payments, double clicks, refunds and confirmation messages correctly, so your records always match the money in your bank.
Which payment methods can customers use?
Most Indian payment gateways support UPI, debit and credit cards, net banking and popular wallets. Some also offer EMI, pay later options and international cards.
| Method | Why it matters | Note |
|---|---|---|
| UPI | Most common way people pay online in India | Supports apps, QR and collect flows |
| Debit and credit cards | Needed for higher values and corporate buyers | Card data is handled by the gateway, not your website |
| Net banking | Preferred by some businesses and older users | Bank list depends on the gateway |
| Wallets | Used by some customers for small payments | Availability varies |
| EMI and pay later | Helps for higher-priced products | Approval depends on the customer and provider |
| International cards | For customers outside India | Needs separate approval from the gateway |
We help you pick the methods your customers really use, so checkout stays simple.
Where can you use a payment gateway?
You can use a payment gateway on your website, mobile app, booking system, invoices and even WhatsApp, through payment links.
Ecommerce website
Checkout on WooCommerce, Shopify, custom or headless stores.
Service website
Pay for a package, consultation or registration fee.
Booking system
Advance payment while booking an appointment or class. See our appointment booking solution.
Invoice payment links
Send a link with each invoice so clients pay in one tap.
Dealer and B2B portals
Dealers pay outstanding bills online.
Subscriptions
Monthly or yearly auto-payments for memberships, software or services.
Mobile apps
In-app payments on Android and iOS, following store rules.
QR at counter
Static or dynamic QR for in-store payments linked to the same account.
If you are building or upgrading an online store, our ecommerce solutions team can handle the store and payment set-up together.
How do you get a payment gateway account in India?
You apply with a payment gateway provider, submit KYC documents for your business and website, and wait for approval. Then the gateway is integrated and tested before going live.
- 1
Choose a provider
Compare supported methods, settlement time, plugin support and fees for your business type.
- 2
Prepare your website
Your site should show contact details, product or service pricing, terms, privacy, refund and shipping policies.
- 3
Submit KYC
Business PAN, GST certificate if registered, bank account proof and owner ID, as asked by the provider.
- 4
Get test keys
Use the provider's test mode to build and test the integration.
- 5
Integrate and test
Set up checkout, webhooks, success and failure pages, receipts and refunds.
- 6
Go live
Switch to live keys after approval and make a few small real payments to confirm.
What is included in our payment gateway integration service?
Our service covers gateway selection, website readiness, integration, webhooks, testing, refunds set-up and team training.
- Advice on choosing a gateway for your business model
- Review of website policy pages and checkout flow before KYC
- Plugin set-up for WooCommerce, Shopify and other platforms, or API integration for custom sites and apps
- Webhook set-up so orders update even if the customer closes the browser
- Success, failure and pending payment pages with clear messages
- Email, SMS or WhatsApp payment receipts
- Refund and partial refund flow
- Payment link and QR set-up for offline sales
- Basic report on payments, failures and settlements
- Training for your accounts and support team
For linking payments with Tally, CRM or ERP, we use our integration solutions process.
Plugin or custom API integration: which is better?
If your site runs on WooCommerce, Shopify or another popular platform, an official plugin is usually faster and safer. Custom websites, apps and portals need API integration.
Official plugin
- Quick set-up on popular platforms
- Updated by the gateway or platform
- Lower first cost
- Standard checkout that works well for most stores
Custom API integration
- Needed for custom websites, apps and portals
- Full control of checkout design and flow
- Supports special cases like split payments or subscriptions
- Needs careful testing and secure coding
We always use the provider's official plugin or official SDK and documentation, and never store card details on your server.
How safe are online payments through a gateway?
Online payments through a reputable gateway are safe when the integration is done correctly. The gateway handles card and bank details; your website should never store them.
- Use HTTPS on every page of your website
- Keep API keys secret and on the server, never in the website code that browsers see
- Verify every payment with the gateway's signature or server check, not only the browser redirect
- Use webhooks to confirm payments in the background
- Give admin access only to staff who need it, with two-step login
- Keep plugins and platforms updated
If your website was ever hacked or shows warnings, fix it before adding payments. Our website maintenance solution covers security updates and monitoring.
What affects the cost of payment gateway integration?
Two costs are involved: the gateway's own charges and our integration work. We explain both clearly and share a quote after a free call.
| Cost part | Paid to | What affects it |
|---|---|---|
| Transaction fee | Payment gateway | Payment method, business type, volume, provider terms |
| Set-up or yearly fee, if any | Payment gateway | Provider plan |
| Integration work | SI Solutions | Platform, custom flows, number of payment points |
| Testing and go-live | SI Solutions | Number of scenarios, refunds, subscriptions |
| Ongoing support | SI Solutions | Changes, updates and issue handling |
GST applies on gateway fees and on our invoices as per law. Always read the provider's current pricing page before you sign up, because rates change.
Common payment set-up mistakes to avoid
Most payment problems come from skipped testing and missing background confirmation. A few simple checks prevent lost orders and angry customers.
Do this
- Test success, failure, pending and refund cases before going live
- Turn on webhooks so orders update even if the browser closes
- Show the final amount with GST before the customer pays
- Send a receipt on email or WhatsApp after payment
- Match settlements with orders every week
Avoid this
- Going live with test keys or mixed keys
- Marking orders paid only from the browser redirect
- Adding too many payment options that confuse buyers
- Hiding refund and cancellation terms
- Sharing gateway admin login among many staff
After launch, connect payments to your CRM or accounts so your team sees who paid and who is pending without checking the gateway dashboard.
Related Pages
Ecommerce Solutions
Online store packages on Shopify or WooCommerce with payments and shipping.
Web Solutions
Business websites on WordPress, Wix or custom code, ready to bring enquiries.
Appointment Booking
Online booking with slots, reminders on WhatsApp and advance payment.
Dealer Portal
An online ordering and account portal for your dealers and distributors.
Frequently Asked Questions
Which is the best payment gateway for a small business in India?
There is no single best gateway for everyone. The right choice depends on your business type, the payment methods your customers use, settlement time, plugin support for your website platform and the fees offered to you. We compare a few licensed providers for your case on a free call and help you apply to the one that fits.
Can I accept online payments without a website?
Yes. Many gateways offer payment links, payment pages and QR codes. You can send a payment link on WhatsApp or email with an invoice, and the customer pays by UPI or card. A simple website still helps with gateway approval and customer trust, so we often suggest a basic site along with links.
What documents are needed for payment gateway KYC?
Providers usually ask for business PAN, GST certificate if you are registered, bank account proof such as a cancelled cheque, owner ID and address proof, and business registration documents for companies or LLPs. Exact needs differ by provider and business type, so check the list in their onboarding form.
How long does payment gateway integration take?
With an official plugin on a ready store, integration and testing can be done in a few days after the gateway account is approved. Custom API integration for apps or portals takes longer. KYC approval time depends on the provider and on how ready your documents and website are.
When does money from online payments reach my bank account?
The gateway settles payments to your bank account after its settlement cycle, which is usually a few working days and is stated in your agreement. Some providers offer faster settlement for an extra fee. The dashboard shows each payment and settlement so your accounts team can match them.
How do refunds work with a payment gateway?
You start a refund from the gateway dashboard or, if integrated, from your website admin. The amount goes back to the customer's original payment method. The time it takes to reach the customer depends on the bank and payment method. We set up refund flows so your records update along with the refund.
Can I collect monthly subscription payments automatically?
Yes, many gateways support recurring payments through UPI AutoPay, card mandates or e-mandates, subject to RBI rules and customer approval. The customer approves once and later payments are collected on schedule. We help set this up for memberships, software plans, tuition fees and service contracts.
Can I accept payments from customers outside India?
Yes, but it usually needs separate approval from the gateway for international cards or cross-border payments. The provider may ask for more documents and may apply different fees and settlement terms. If you serve clients in the USA, UK, UAE or other countries, tell us early so we choose a gateway that supports this and set up currency display correctly.
Why do some online payments fail?
Payments fail for many reasons, such as wrong OTP, low balance, bank server issues, network drops or card limits. Some payments stay pending for a while before success or failure. Good integration shows clear messages, lets the customer retry and uses webhooks so late successes still update the order correctly.
Talk to our team today
Call or WhatsApp +91 99159 60958. We reply fast, Monday to Friday.