Online payments have become an essential part of shopping, subscriptions, digital services, and e-commerce. Whether you run an online store, sell digital products, operate a mobile application, or provide services through a website, accepting payments online can make it easier for customers to complete purchases.
A payment gateway helps businesses accept and process electronic payments through websites and mobile apps. It connects the checkout experience with the payment-processing systems that communicate with banks, card networks, and other payment services.
In this guide, you will learn what a payment gateway is, how a payment gateway works, which payment methods it supports, how much payment gateways charge in India, and what to consider before choosing a provider.
What Is a Payment Gateway?
A payment gateway is a service that facilitates communication between a merchant's website or mobile application and the systems involved in processing an electronic payment. When a customer reaches checkout, the gateway helps transmit the necessary payment information securely and returns the transaction result to the merchant's system.
For example, imagine you sell an online course for ₹999. A customer chooses UPI or a credit card at checkout. Your payment gateway helps initiate the transaction, communicate with the relevant payment systems, and inform your website whether the payment was successful, declined, or left pending.
A payment gateway is not the same as a bank account or a payment method. UPI, cards, and net banking are ways customers pay, while the gateway provides technology that helps your business accept those payments online.
How Does a Payment Gateway Work?
A typical online payment involves several systems working together. The exact process depends on the payment method, gateway integration, acquiring bank, and payment provider.
- Customer starts checkout: The customer adds a product or service to the cart and selects an available payment method.
- Payment details are submitted: The checkout page or payment provider collects the information required for the selected method.
- Gateway processes the request: The gateway securely transmits payment information to the relevant processing systems.
- Payment authorization takes place: Banks, card networks, UPI systems, or other participants validate and process the transaction as applicable.
- Transaction status is returned: The payment system reports whether the transaction succeeded, failed, or remains pending.
- Merchant receives confirmation: The website or app updates the order status after verifying the transaction result.
- Settlement takes place: Funds are transferred to the merchant according to the provider's settlement process and applicable terms.
Example of a Payment Gateway Transaction
Suppose a customer purchases a ₹1,500 product from your website using a debit card. The customer submits the payment, the gateway routes the request through the relevant payment infrastructure, and the issuing bank authorizes or declines it. If the payment succeeds, your website receives the result and marks the order as paid only after appropriate verification.
The provider may deduct applicable transaction fees and taxes before settling the remaining amount to your registered bank account. The exact charges and settlement timing depend on your agreement, payment method, and provider.
Types of Payment Methods Supported by Payment Gateways
Payment gateways can support multiple payment methods through a single integration. The available options depend on the provider, your business category, customer location, and account approval.
| Payment Method | How It Works | Best Use Case |
|---|---|---|
| UPI | Customers authorize a payment through a supported UPI app or interface. | Indian customers and mobile-first checkout |
| Credit Cards | Customers pay using an eligible credit card. | E-commerce, subscriptions, and higher-value purchases |
| Debit Cards | Customers use a debit card linked to their bank account. | Online stores and service payments |
| Net Banking | Customers complete payment through their bank's online banking service. | Customers who prefer direct bank-based payments |
| Digital Wallets | Customers pay using a supported wallet balance or wallet service. | Convenient checkout for supported users |
| EMI and Pay Later | Eligible customers choose an approved installment or deferred-payment option. | Eligible purchases where these options are offered |
| International Cards | Eligible overseas customers pay using supported international cards. | Businesses serving customers in other countries |
Not every gateway supports every payment method, and availability does not guarantee that every transaction will be approved. Before choosing a provider, check which methods are available for your business and whether additional onboarding or eligibility requirements apply.
What Is the Difference Between a Payment Gateway and a Payment Aggregator?
The terms payment gateway and payment aggregator are often used interchangeably, but they describe different functions. A payment gateway primarily provides technology for transmitting and processing payment information. A payment aggregator can facilitate payments for multiple merchants and, under the applicable model, receive, pool, and settle funds.
Some companies provide both gateway technology and payment aggregation services. Therefore, the distinction depends on the actual service and operating model rather than only the product's marketing name.
| Feature | Payment Gateway | Payment Aggregator |
|---|---|---|
| Primary role | Provides technology to transmit payment information and facilitate processing. | Facilitates payment acceptance for merchants and may handle the flow and settlement of funds. |
| Fund handling | A technology-only gateway does not itself handle funds. | A payment aggregator may receive and settle funds under the applicable arrangement. |
| Merchant setup | May connect a merchant with acquiring banks and payment services. | Can provide a combined onboarding, checkout, and settlement service. |
| Regulatory considerations | Applicable requirements depend on the actual activities and relevant rules. | Authorization and compliance requirements apply as specified by the relevant regulator. |
In India, the Reserve Bank of India distinguishes payment aggregators from payment gateways in its regulatory framework. Businesses should check the current RBI directions and the provider's legal role instead of assuming that every payment service operates under the same requirements.
Read the Reserve Bank of India's payment aggregator directions
What Are Payment Gateway Charges in India?
Payment gateway charges are fees a business may pay for accepting and processing online payments. These costs vary by provider, payment method, transaction type, business category, negotiated pricing, and optional services.
Many providers use a transaction-based pricing model. Others may offer custom enterprise pricing or additional paid features. Do not assume that every payment method has the same fee or that every provider follows an identical pricing structure.
Common Payment Gateway Fees
- Transaction fee: A fee calculated on eligible successful transactions, according to the provider's pricing terms.
- GST and applicable taxes: Taxes may apply to the provider's service charges.
- Setup fee: Some arrangements may include onboarding or setup charges, while others do not.
- Annual maintenance fee: Check whether the plan includes recurring account or service fees.
- International payment fee: International cards and cross-border transactions may have different pricing and settlement conditions.
- Refund and dispute costs: Review the terms for refunds, chargebacks, disputes, and related processing costs.
- Optional service fees: Features such as faster settlement, specialized integrations, or additional services may cost extra.
Before signing up, check the provider's official pricing page and written commercial terms. Compare fees for your expected payment mix, settlement timelines, refund handling, international transactions, and any recurring charges.
Are UPI Payments Free for Businesses?
The cost of accepting UPI payments depends on the transaction type, applicable rules, and the service arrangement. Zero merchant discount rate on eligible bank-account-based UPI transactions does not automatically mean every related payment service or optional platform feature is free.
Review the current pricing terms for your exact UPI payment flow. Ask the provider whether any platform fee, subscription charge, optional service fee, or tax applies, and request clarification in writing if the pricing is unclear.
Best Payment Gateways in India
Several payment providers serve Indian businesses. The best choice depends on your business type, technical requirements, customer payment preferences, pricing agreement, support needs, and eligibility. The providers below are options to evaluate, not a definitive ranking.
1. Razorpay
Razorpay provides online payment acceptance products for eligible businesses, including website and app integrations. Its offerings include checkout tools and payment-related products designed for different business workflows.
- Options for accepting multiple payment methods
- Website and mobile app integration options
- Developer documentation and APIs
- Payment links and other payment collection tools
- Dashboard and transaction management features
Razorpay may be worth evaluating if you want a broad set of payment tools and developer integration options. Check its current onboarding criteria, supported business categories, and pricing before making a decision.
Visit Razorpay's official website and pricing
2. Cashfree Payments
Cashfree Payments offers payment acceptance and related payment products for businesses. Its documentation and integration options can be useful for teams building websites, mobile apps, and payment workflows.
- Online payment gateway integrations
- Support for multiple payment methods, subject to eligibility
- Developer APIs and integration documentation
- Payment collection and settlement-related tools
- Additional payment products for supported use cases
Consider Cashfree if its integration options, payment methods, pricing, and settlement terms match your business requirements. Confirm the fees and any promotional conditions directly with the provider.
Visit Cashfree Payments' official pricing page
3. PayU
PayU offers payment processing products and integration workflows for businesses. Its documentation helps developers evaluate different ways to add online payments to websites and applications.
- Payment integration options for websites and apps
- Support for multiple payment methods, depending on the account
- Developer documentation
- Checkout and payment workflow options
- Tools for businesses with different payment requirements
PayU is another provider to compare when evaluating online payment acceptance. Review the integration requirements, supported business categories, commercial terms, and customer support arrangements.
Read PayU's official payment integration documentation
4. Other Bank and Payment Service Providers
Depending on your business and payment requirements, you may also evaluate services offered by banks and other payment providers. Availability, onboarding rules, supported payment methods, and pricing differ, so compare the actual service rather than choosing only by brand recognition.
Payment Gateway Comparison: What Should You Check?
| Comparison Factor | What to Evaluate |
|---|---|
| Payment methods | UPI, cards, net banking, wallets, and other methods relevant to your customers |
| Pricing | Transaction fees, taxes, recurring charges, refunds, and optional services |
| Integration | PHP, JavaScript, Android, iOS, plugins, APIs, and hosted checkout options |
| Settlement | Standard settlement timelines, eligibility for faster settlement, and applicable fees |
| Security | Hosted checkout, tokenization support, authentication, fraud controls, and compliance |
| Reliability | Transaction success rates, uptime information, incident communication, and reporting |
| Developer experience | Documentation quality, test environment, SDK maintenance, webhooks, and support |
| Business eligibility | Required documents, prohibited categories, verification, and account approval conditions |
How to Choose the Right Payment Gateway for Your Website
The right payment gateway should match your business model and make the checkout experience reliable for customers. A small website selling digital products may have different requirements from a large e-commerce store or a subscription-based mobile application.
- Identify your business model: Decide whether you sell physical products, digital products, subscriptions, services, or marketplace transactions.
- Understand your customers: Choose payment methods that your target customers are likely to use.
- Calculate total cost: Compare transaction fees, applicable taxes, recurring charges, refunds, and optional services.
- Check integration options: Confirm compatibility with your website platform, backend language, or mobile app.
- Review security and compliance: Check the provider's security features, onboarding requirements, and applicable legal obligations.
- Test the checkout flow: Evaluate the payment experience, error handling, mobile usability, and payment status updates.
- Check settlements and support: Understand settlement timelines, dispute processes, and how technical problems are handled.
- Read the agreement: Review account restrictions, refund conditions, fees, settlement terms, and termination clauses before going live.
How to Integrate a Payment Gateway Into a Website
Most providers offer more than one integration method. A hosted checkout redirects or opens a payment interface provided by the gateway, while an API-based integration gives developers more control over the payment flow. The best option depends on your technical needs and the payment information your system must handle.
- Create a merchant account with a suitable provider and complete its verification process.
- Read the official documentation for your website platform and preferred integration method.
- Create test credentials and configure the provider's test environment.
- Create a payment order on your backend and use the provider's supported API or SDK.
- Display the supported checkout options and initiate the payment securely.
- Verify the payment result on your server using the provider's API, signature verification, or webhook mechanism as documented.
- Update the order only after verifying the correct transaction, amount, currency, and order reference.
- Test successful, failed, cancelled, pending, duplicate, and delayed-notification scenarios.
- Switch to live credentials only after testing and completing the provider's required onboarding.
How to Integrate a Payment Gateway Into an Android App
If you are building an Android application, choose a provider that supports your required Android integration and payment methods. Use the provider's official Android SDK or documented checkout flow where appropriate, and keep sensitive operations on your backend.
- Register the app's backend and merchant account with the provider.
- Create payment orders through a secure backend endpoint.
- Launch the provider's supported Android checkout or payment interface.
- Handle success, failure, cancellation, and pending states in the app.
- Verify final payment status with your backend before unlocking a purchase or granting a digital entitlement.
- Implement duplicate-event protection and test interrupted or delayed payment flows.
For digital content and features sold inside Android apps, review the current Google Play payments policy before selecting an integration. A third-party payment gateway is not automatically permitted for every in-app digital purchase; requirements can vary by purchase type, country, and applicable program.
Read Google Play's payments policy
Are Payment Gateways Safe?
Payment gateways can help protect payment information through security controls such as encrypted connections, hosted checkout, tokenization support, authentication, fraud monitoring, and transaction verification. However, security depends on the provider, integration, merchant configuration, and customer behavior.
A business should use a reputable provider, keep software and dependencies updated, protect API credentials, verify payment notifications, and limit access to transaction data. Using a payment gateway does not remove the merchant's responsibility to secure its own website, application, accounts, and customer information.
Common Payment Gateway Problems and How to Handle Them
| Problem | Possible Cause | Recommended Action |
|---|---|---|
| Payment declined | Bank restrictions, insufficient funds, incorrect details, or risk checks | Show a clear message and offer another supported payment method |
| Payment pending | Delayed bank response or delayed status notification | Check the provider's transaction status before confirming or retrying |
| Money debited but order failed | The payment status and merchant order status may not have synchronized | Verify the transaction with the provider and follow its reconciliation or refund process |
| Duplicate order or payment | Repeated requests or missing idempotency controls | Use unique order references, idempotent backend operations, and duplicate-event checks |
| Settlement delayed | Provider review, bank processing, holidays, or account requirements | Check settlement reports and contact provider support when necessary |
| Checkout not loading | Integration errors, network problems, or provider downtime | Review server logs, SDK documentation, and provider status updates without exposing sensitive data |
Advantages of Using a Payment Gateway
- Accept payments online without building an entire payment-processing system from scratch.
- Offer multiple payment methods through a supported integration.
- Make checkout more convenient for customers shopping on websites and apps.
- Automate payment status updates and order workflows.
- Access transaction reports and reconciliation tools.
- Support business growth as payment volume and customer needs increase.
- Use available security features and provider-managed payment interfaces.
Disadvantages and Limitations of Payment Gateways
- Transaction and service fees can reduce profit margins.
- Merchant onboarding and verification can take time.
- Payments can fail or remain pending because of bank, network, or provider issues.
- Settlement schedules and account reviews may affect cash flow.
- Some business categories or payment methods may not be supported.
- Integration requires careful testing, monitoring, and ongoing maintenance.
- Merchants remain responsible for order fulfillment, customer support, fraud prevention, and applicable compliance obligations.
Payment Gateway vs Payment Processor
A payment gateway primarily facilitates the secure transmission of payment information, while a payment processor handles the transaction processing communications between relevant financial institutions and payment networks. In practice, these functions may be bundled together by one provider, so businesses do not always need to purchase them separately.
Payment Gateway vs UPI
UPI is a payment system that enables eligible users to transfer money through supported applications and bank accounts. A payment gateway is a technology service that can allow a business to accept UPI alongside other supported payment methods. They are complementary rather than competing products.
Payment Gateway Requirements for Businesses in India
Payment providers generally perform merchant onboarding and verification before enabling live payments. The exact documents depend on the provider, legal structure, business category, and applicable rules.
- Business or proprietor identity and verification documents, as applicable
- PAN and other tax-related information where required
- Bank account details for settlements
- A working website or app describing the business and its products or services
- Contact information and customer support details
- Clearly available refund, cancellation, shipping, privacy, and terms policies where relevant
- Additional documents or approvals requested for the business category
Requirements vary, and this list is not a universal checklist. Review the provider's current onboarding instructions and the applicable Reserve Bank of India framework. Do not assume that creating an account automatically authorizes your business to accept every payment type.
Frequently Asked Questions
What is a payment gateway in simple words?
A payment gateway is a service that helps a website or app accept online payments by securely transmitting payment information and returning transaction results.
How does a payment gateway work?
A customer selects a payment method at checkout, the gateway transmits the payment request to the relevant payment systems, and the transaction is authorized or declined. The merchant then verifies the result and completes the order when appropriate.
Which is the best payment gateway in India?
There is no single best payment gateway for every business. Compare providers such as Razorpay, Cashfree Payments, and PayU based on supported payment methods, fees, settlement terms, integration quality, security features, eligibility, and customer support.
How much does a payment gateway cost in India?
Costs depend on the provider, payment method, business agreement, and optional services. Some providers offer pay-as-you-go pricing, while other arrangements may include custom rates or additional fees. Check the official pricing page and your merchant agreement for the current charges.
Can I use a payment gateway without a website?
Some providers offer payment links, hosted payment pages, invoices, or other collection tools that can be used without building a full e-commerce website. Availability depends on the provider and your business approval.
Can a payment gateway accept UPI and credit cards?
Many payment gateways support both UPI and cards, but the exact methods depend on the provider, merchant account, and eligibility. Confirm the supported payment options before integration.
How long does payment gateway settlement take?
Settlement timing varies by provider, payment method, merchant agreement, risk checks, and banking schedules. Review the provider's settlement policy rather than assuming that all payments reach your bank immediately.
Is a payment gateway required for an online store?
A payment gateway is a common way to accept online payments, but it is not the only possible collection method. Businesses may also use payment links, bank transfers, cash on delivery, or other suitable options depending on their model.
Is a payment gateway safe for customers?
A reputable gateway can provide security features that help protect transactions, but customers should still verify the merchant, use secure connections, never share their UPI PIN or one-time passwords with anyone, and report suspicious activity to their bank or payment provider.
Can I integrate a payment gateway with PHP or Android?
Many providers offer APIs, SDKs, and integration guides for backend technologies such as PHP and for Android applications. Use official documentation, keep secret credentials on the server, and verify payment status securely before delivering an order or digital entitlement.
Final Verdict
A payment gateway is an important part of online commerce because it helps websites and mobile applications accept electronic payments without building payment-processing infrastructure from scratch. Understanding how it works, which payment methods it supports, and how transaction verification and settlement operate can help you make better technical and business decisions.
If you are choosing a payment gateway in India, compare Razorpay, Cashfree Payments, PayU, and other suitable providers using your actual business requirements. Look beyond promotional pricing and evaluate security, integration, settlement terms, customer support, and total cost. Always confirm current pricing, eligibility, and regulatory requirements directly with the provider and relevant official sources.
