What is a Payment Gateway? Types, and How It Works?

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The Southeast Asian e-commerce market is on a rapid growth trajectory, expected to reach a GMV of $230 billion by 2026. Singapore, a key player in this expansion, recorded an e-commerce GMV of $8 billion in 2023, projected to grow to $10 billion by 2025. With over 62.8% of Singaporeans making online purchases each week, the need for secure and efficient payment processing has never been greater.

This is where a payment gateway plays a vital role, ensuring smooth transactions while safeguarding sensitive financial data. In this blog, we’ll explore how payment gateways work, their key benefits, and why they are essential for a seamless payment experience.

What is a Payment Gateway?

A payment gateway is a secure technology that enables businesses to accept online payments seamlessly. Acting as a bridge between customers and merchants, it ensures the safe transmission of payment details while facilitating transactions across credit cards, debit cards, UPI, and digital wallets.

By verifying payment information, checking fund availability, and encrypting sensitive data, it protects against fraud and unauthorized access. This technology makes online payments fast, convenient, and secure, helping businesses offer a smooth and reliable checkout experience.

What Does a Payment Gateway Do?

A payment gateway performs several essential functions to ensure that online transactions are secure, fast, and reliable.

Here’s how it works:

  • Authorization: The gateway verifies the customer’s payment details, checks for sufficient funds, and approves or declines the transaction in real time.
  • Encryption: Sensitive payment data, such as credit card numbers, is encrypted before being transmitted, protecting it from unauthorized access or fraud.
  • Connection with Payment Processor: It acts as a bridge between the business’s checkout system and the payment processor, ensuring seamless fund transfers.
  • Fraud Detection: Advanced security measures, like address verification (AVS) and card verification (CVV) checks, help identify and block suspicious transactions.
  • Multi-Currency Support: Businesses can accept payments in different currencies, making it easier to cater to international customers.
  • Data Collection & Reporting: Merchants receive transaction insights, refund management tools, and analytics to improve payment operations.

 

By managing these functions, a payment gateway ensures smooth and secure digital payments for businesses and customers alike.

Payment Gateway Examples

Businesses in Singapore rely on various payment gateways to process transactions securely and efficiently. Some of the most widely used options include Razorpay, Stripe, PayPal, Adyen, HitPay, GrabPay, Atome, and Omise.

How Does a Payment Gateway Work?

A payment gateway facilitates online transactions by securely transmitting payment data between the customer, the business, and financial institutions.

Here’s how it works:

  • Transaction Initiation: The customer selects products or services, proceeds to checkout, and enters payment details, such as card information or a digital wallet.
  • Data Encryption: The payment gateway encrypts sensitive payment details to protect them from unauthorized access during transmission.
  • Data Transmission: The encrypted data is sent to the business’s server and then forwarded to the payment gateway for further processing.
  • Verification & Authorization: The payment gateway sends the data to the acquiring bank, which forwards it to the customer’s issuing bank for verification. The issuing bank checks account balance and validity before approving or declining the transaction.
  • Transaction Status: The response is sent back through the payment gateway to the business’s website, notifying the customer if the payment was successful or declined.

How Do Online Payments Work with a Payment Gateway?

When a customer makes an online payment, the payment gateway ensures smooth and secure processing by facilitating communication between multiple parties.

  • Customer & Merchant: The customer selects a product and enters payment details on the merchant’s website.
  • Payment Gateway Processing: The gateway encrypts the data and sends it to the acquiring bank.
  • Bank Communication: The acquiring bank forwards the request to the customer’s issuing bank for verification.
  • Authorization & Settlement: The issuing bank approves or declines the transaction, and the gateway relays this status to the merchant. If approved, the funds are processed, completing the payment.

Types of Payment Gateway

Choosing the right payment gateway is essential for businesses looking to offer secure and seamless transactions. Here are the main types of payment gateways used in Singapore and Southeast Asia:

  • Hosted Payment Gateway: Customers are redirected to a third-party payment service provider to complete their transaction. This option is easy to set up and secure, but businesses have less control over the checkout experience. Ideal for small businesses that prioritize convenience.
  • Self-Hosted Payment Gateway: Payment details are collected on the business’s website before being sent to the provider for processing. This allows for a fully customized checkout but requires strict compliance with security standards. Suitable for businesses that want more control over branding and customer experience.
  • API-Hosted Payment Gateway: Payments are processed directly within the website or app using an API. This provides a seamless user experience but demands strong security measures. A great choice for businesses with technical expertise.
  • Local Bank Integration: Customers complete payments on their bank’s portal before returning to the merchant’s site. This is beneficial for businesses catering to markets where local banks are trusted payment providers.

 

Each type serves different business needs, balancing ease of use, security, and customization.

Why Is Payment Gateway Important to Supercharge Your Business in Singapore?

A reliable payment gateway is essential for businesses in Singapore to stay competitive in the fast-evolving digital landscape. It ensures secure, seamless, and real-time transactions, boosting business growth in multiple ways:

  • Enhanced Customer Experience: A smooth checkout process reduces friction and improves user satisfaction. With multiple payment options like credit/debit cards, e-wallets, and bank transfers, customers can pay through their preferred method, leading to increased conversions.
  • Reduced Cart Abandonment: Offering diverse payment methods and a seamless transaction process minimizes checkout drop-offs. A fast and efficient gateway ensures that customers complete their purchases without delays or errors.
  • Multi-Currency Support for Global Expansion: Singapore’s businesses thrive in international markets, and a payment gateway with multi-currency capabilities allows seamless cross-border transactions. This broadens customer reach and eliminates conversion hassles.
  • Increased Security & Business Credibility: Advanced fraud detection and encryption safeguard transactions, enhancing trust. Secure payment processing reassures customers and strengthens brand credibility.
  • Real-Time Processing for Better Cash Flow: Instant transaction verification and fund settlements streamline business operations, ensuring steady cash flow and better financial management.
    In Singapore’s tech-savvy and e-commerce-driven market, a robust payment gateway is not just an option—it’s a necessity for growth and scalability.

How is a Payment Processor Different from Payment Gateway?

While a payment gateway securely transmits payment data and verifies transactions, a payment processor handles the back-end movement of funds between banks.

What is a Payment Processor?

A payment processor, sometimes referred to as a merchant services provider, handles the back-end processing of a transaction. It works behind the scenes to facilitate the movement of funds between the customer’s bank (issuing bank) and the merchant’s bank (acquiring bank). The payment processor verifies the transaction, checks account balances, and ensures that funds are correctly settled into the merchant’s account.

Key functions of a payment processor:

  • Processes payments by connecting merchants to banks and card networks
  • Authorizes or declines transactions based on available funds and card validity
  • Transfers funds from the customer’s account to the merchant’s account
  • Ensures compliance with security standards like PCI DSS

How They Work Together

When a customer makes an online purchase, the payment gateway encrypts the payment details and sends them to the payment processor. The processor then communicates with the relevant banks and card networks to verify the transaction, approve or decline it, and initiate fund transfers. The payment gateway receives the response and informs the merchant and customer of the transaction outcome.

Comparison Table: Payment Gateway vs. Payment Processor

Feature Payment Gateway Payment Processor
Primary Role Transmits and secures transaction data Processes and settles payments between banks
Function Encrypts, verifies, and forwards payment details Authorizes transactions and moves funds
Interaction Connects the customer, merchant, and financial institutions Communicates with issuing and acquiring banks
Security Focus Fraud detection, encryption, and authentication PCI DSS compliance and secure fund transfers
Integration Works with e-commerce platforms, websites, and apps Works with banks, card networks, and merchant accounts
Example Razorpay’s Payment Gateway Visa, Mastercard, PayPal (as payment processors)

Both components are crucial for seamless digital transactions. While the payment gateway ensures secure data transmission and fraud prevention, the payment processor manages transaction approvals and fund transfers. Together, they enable businesses to accept online payments smoothly and securely.

Difference Between Payment Gateway and Payment Terminal

While payment gateways and payment terminals serve the same fundamental purpose—facilitating payments—they operate in different environments and cater to distinct business needs. Understanding their differences can help businesses choose the right solution based on their sales channels.

What is a Payment Terminal?

A payment terminal, also known as a point-of-sale (POS) terminal, is a physical device used to accept card payments in a brick-and-mortar setting. Customers can swipe, insert, or tap their cards—or use contactless payment options like mobile wallets—to complete transactions. The terminal connects to a payment processor to authorize and settle funds.

When to Use a Payment Terminal:

  • Retail stores processing in-person payments
  • Restaurants and cafés accepting card transactions
  • Businesses offering contactless payments via NFC-enabled devices
  • Service providers requiring on-the-spot payment collection

Comparison Table: Payment Gateway vs. Payment Terminal

Feature Payment Gateway Payment Terminal
Primary Role Facilitates online transactions Enables in-person card payments
Transaction Environment E-commerce websites, mobile apps, digital platforms Physical stores, restaurants, service locations
Payment Methods Credit/debit cards, digital wallets, UPI, BNPL, net banking Credit/debit cards, contactless (NFC), mobile wallets
Connection Type Works over the internet, integrates via APIs Connects via phone lines, Wi-Fi, or mobile networks
Security Measures Uses SSL/TLS encryption, AVS, CVV checks, fraud detection Uses PCI DSS compliance, EMV chip technology, end-to-end encryption
Integration Requires API integration with online platforms Involves physical setup with POS systems or standalone devices

Both solutions enhance payment experiences but cater to different business operations. While a payment gateway is ideal for online businesses, a payment terminal ensures seamless in-person transactions. Many businesses today use a combination of both to offer customers greater flexibility and convenience.

How Much Does a Payment Gateway Cost in Singapore?

The cost of payment gateway in Singapore typically includes several components, such as setup fees, transaction charges, monthly subscriptions, and additional costs for features like fraud detection, chargeback protection, and multi-currency support. While pricing structures vary across providers, businesses generally encounter the following fees:

  • Setup Fees: One-time cost for account activation (varies by provider).
  • Transaction Fees: A percentage of each transaction, sometimes with a fixed fee.
  • Monthly Subscription: Recurring charge for access to premium features.
  • Additional Fees: Charges for international payments, refunds, or advanced security tools.

With Razorpay, businesses can start accepting payments at just 2.9% per transaction, ensuring a cost-effective and transparent pricing model.

Payment Gateway in Singapore: Regulation and Trends

Singapore’s payment gateway ecosystem is governed by the Payment Services Act (PSA) and regulated by the Monetary Authority of Singapore (MAS) to ensure security, compliance, and consumer protection. Businesses must adhere to strict guidelines, including anti-money laundering (AML) measures, data security standards, and licensing requirements.

Key trends shaping the industry include:

  • Rise of Digital Wallets & Mobile Payments – Increasing adoption of e-wallets and QR-based payments.
  • Cross-Border E-Commerce Growth – Seamless international transactions driving business expansion.
  • Contactless Payment Innovation – NFC and biometric authentication enhancing convenience.
  • Blockchain & Cryptocurrency Integration – Emerging tech reshaping digital transactions.

 

Staying compliant while leveraging these trends ensures businesses remain competitive in Singapore’s evolving digital payments landscape.

Key Features to Look For in a Payment Gateway

Choosing the right payment gateway is crucial for seamless transactions and business growth. Here are the essential features to consider:

  • Security & Compliance – Ensure the gateway meets PCI DSS standards to protect customer data and prevent fraud. Look for features like encryption and tokenization.
  • Multi-Currency Support – If you cater to global customers, a gateway with multi-currency acceptance ensures smooth international transactions.
  • Fraud Detection & Risk Management – Advanced fraud prevention tools, such as AI-driven monitoring and chargeback protection, help secure transactions.
  • Ease of Integration – Choose a solution that integrates seamlessly with your e-commerce platform, accounting tools, and CRM for operational efficiency.
  • Scalability – Whether you’re a startup or an enterprise, pick a gateway that can handle increasing transaction volumes without performance issues.
  • Payment Method Support – Ensure it accepts credit/debit cards, UPI, digital wallets, BNPL options, and alternative payment methods preferred by your customers.
  • Customer Experience – A fast, mobile-friendly, and customizable checkout enhances conversions and reduces cart abandonment.
  • Reliable Customer Support – 24/7 assistance can be critical for resolving payment issues quickly, ensuring uninterrupted business operations.

Selecting a gateway with these features ensures a secure, efficient, and scalable payment experience for your business and customers.

5 Incredible Benefits of Payment Gateway

A payment gateway is more than just a tool for processing transactions—it plays a crucial role in shaping the customer experience and driving business growth. Here are five major benefits that make payment gateways indispensable:

  1. Seamless Checkout Experience
A smooth and fast checkout process reduces cart abandonment and enhances customer satisfaction. Payment gateways automate transactions, ensuring quick processing and minimizing delays, leading to a hassle-free shopping journey.
  2. Versatile Payment Options
Modern consumers expect choices. Payment gateways enable businesses to accept various payment methods, including credit cards, digital wallets, and UPI, catering to diverse customer preferences and maximizing conversions.
  3. Increased Customer Trust
A secure and efficient payment process reassures customers, fostering trust in the brand. When customers feel confident about their transactions, they are more likely to return, driving repeat business.
  4. Global Payment Acceptance
Expanding internationally becomes easier with a payment gateway that supports multiple currencies and local payment methods. This flexibility allows businesses to reach a broader customer base and provide localized payment experiences.
  5. Enhanced Security
Security is a top priority in digital transactions, and payment gateways provide robust protection through encryption and fraud detection tools. By safeguarding sensitive payment data, they help prevent unauthorized access and instill confidence in customers.

How Does a Payment Gateway Keep Information Secure

Payment gateways use advanced security measures to protect sensitive payment data and prevent fraud.

  1. Encryption & Tokenization
Sensitive payment details are encrypted using advanced algorithms, while tokenization replaces card information with unique tokens, preventing unauthorized access.
  2. PCI-DSS Compliance
Payment gateways follow PCI-DSS standards, ensuring secure storage, processing, and transmission of cardholder data.
  3. Fraud Monitoring & IP Verification
Gateways verify IP addresses and monitor transactions in real time, detecting suspicious activities to prevent cyber threats.
  4. Multi-Factor Authentication
Virtual Payer Authentication (VPA) and 3-D Secure protocols add extra authentication layers, reducing unauthorized transactions.

These measures collectively safeguard transactions and enhance customer trust.

How can Razorpay Help?

With over 8 million businesses powered globally, Razorpay offers a secure, scalable, and easy-to-integrate payment gateway designed to meet the needs of modern businesses. Here’s how Razorpay can help:

  • Instant Activation – Get started within minutes with a fully online onboarding process and minimal documentation.
  • Seamless Integration – Plugins for major platforms allow businesses to integrate Razorpay quickly and go live in hours.
  • Multi-Currency & Multiple Payment Methods – Accept payments via credit/debit cards, eWallets, and PayNow, catering to a global customer base.
  • Scalable & API-Driven – Automate transactions with API-driven solutions that eliminate manual processes.
  • Real-Time Insights – A powerful dashboard provides data-driven reporting for informed business decisions.
  • Enterprise-Grade Security – PCI DSS, GDPR compliance, and ISO 27001 certification ensure secure transactions and regulatory adherence.
  • Reliable Local Support – A dedicated team offers fast, responsive assistance at every step.
    With its robust features and competitive pricing, Razorpay is a top choice for businesses in Singapore looking for a secure and efficient payment solution.

Conclusion

In Singapore’s rapidly expanding digital economy, a robust payment gateway is essential for businesses to thrive. By ensuring secure, seamless, and efficient transactions, payment gateways enhance customer experience, reduce cart abandonment, and support global expansion with multi-currency capabilities. The right payment gateway not only streamlines operations but also builds trust with customers through advanced fraud protection and real-time processing.

Choosing a reliable solution like Razorpay can help businesses simplify payments, scale effortlessly, and provide a seamless checkout experience. Explore Razorpay’s cutting-edge payment solutions today and take your business to the next level with secure and efficient digital transactions.

FAQs

Q. 1 What is an example of a payment gateway?

A payment gateway is a service that securely processes online transactions by transferring payment data between customers, merchants, and banks. Examples include Razorpay, PayPal, and Stripe.

Q. 2 Can a payment gateway be integrated with my website?

Yes, most payment gateways provide APIs, plugins, or hosted solutions that allow seamless integration with websites, e-commerce platforms, and mobile apps.

Q. 3 How long does it take to set up a payment gateway?

The setup time varies by provider. Some payment gateways allow instant activation, while others may require business verification, which can take a few hours to a couple of days.

Q. 4 Are there any transaction limits imposed by a payment gateway?

Yes, transaction limits depend on the payment gateway, business type, and account verification level. Many providers offer flexible limits that can be increased upon request.

Q. 5 Is UPI a payment gateway?

No, UPI (Unified Payments Interface) is a real-time payment system that facilitates instant money transfers. A payment gateway, on the other hand, enables businesses to accept various online payment methods, including UPI.