Payment Gateway Integration in Business Websites and Mobile Apps

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What is payment gateway integration? Learn about the process of integrating top payment gateways into your websites, benefits, and more.

According to a recent Statista report, eCommerce sales will reach $4.32 trillion in 2025. The online payment system has contributed to elevating e-commerce sales to achieve the trillion-dollar mark.

Therefore, it’s high time for businesses to adopt the right payment gateways. These online payment gateways can help improve customer experience, increase profits, establish a strong brand persona, and improve ROI.

In this article, we will talk about payment gateway integration in business websites and mobile apps.

Types of Payment Gateways

Types of Payment Gateways

1. Hosted Payment Gateways

Businesses rely on third-party services for hosted payment gateways. For example, Square payment gateway integration allows website owners to build a custom payment solution. They are easy to integrate and offer robust security.

2. Self-hosted Payment Gateways

You can choose the self-hosted payment gateway to give your target audience a personalized shopping experience. These gateways can offer a great user experience and a unique checkout process. If you are ready to adopt self-hosted payment gateways, you must comply with the data protection standards, including PCI DSS, AML, and GDPR.

3. API-hosted Payment Gateways

API-hosted payment gateways are feasible for businesses with a simple checkout system. Companies can collect payment information using APIs and provide a great customer experience. However, they must have secure cardholder data to meet data protection standards.

4. Local Bank Payment Gateway Integration

Businesses can leverage the bank’s payment server and integrate their payment gateways directly. Bank integration is helpful when payment companies are active in a specific region or locality. However, the quality of payment services is not guaranteed; business service quality depends on the bank’s current technologies and support level.

How Do Payment Gateways Work?

Payment gateways take merely a few seconds to complete the online transaction process, despite having a high transaction volume.

  • Customers put in their payment information to check out and pay online. The payment gateways encrypt the customers’ information and send it to the payment processor. It transfers the information to the concerned bank for authentication.
  • The concerned bank authenticates the information. Then, the result goes to the payment processor for further processing.
  • Next, the payment processor delivers the results to the payment gateways. At last, the merchant’s website receives the final transaction status before delivering orders.

How Payment Gateway Integration is Beneficial for Your Business?

Businesses can harness numerous benefits by integrating payment gateways into their fintech apps, such as

  • E-commerce websites like WooCommerce and Shopify allow third-party payment gateway integrations, such as Stripe and PayPal. Businesses pay a fee and handle high transaction volume on their website.
  • Third-party solutions can save a substantial payment gateway integration cost, including development and maintenance expenses.
  • Claim settlement, refund management, and payment tracking become easy with payment gateways.
  • With custom payment gateway integration, you can encourage other merchants to join your platform and generate passive income.

Note that all the benefits exist, and the payment gateway industry still faces many challenges. You must overcome these challenges to choose and create a valuable payment gateway system.

Online Payment Gateway Integration Challenges

Discover the challenges companies encounter when integrating payment gateways into their website or mobile apps.

  • Creating custom payment gateways for niche industries.
  • Multi-platform compatibility for a seamless payment gateway integration process.
  • Compliance with regional and location-specific regulations and protocols.
  • Reducing delays or transaction failures during high transaction volumes.
  • Adopting emerging technologies like Artificial Intelligence, AR/VR, etc.
  • Sustaining optimal compatibility with the existing hardware.
  • Ensuring security and data management across multiple payment gateways.

Hence, businesses must choose the payment gateway model to ensure long-term profitability.

How to Choose an Appropriate Payment Gateway Model?

Here is what you need to consider while choosing the appropriate payment gateway.

  • A hosted payment gateway is befitting for businesses with low transaction volume. However, you can switch to API-based payment gateway solutions as the transaction volume increases.
  • A self-hosted payment gateway is beneficial for high-volume transactions in large enterprises. It provides much better control and optimization to meet the specific needs of your target audience.
  • API and self-hosted payment gateways are good if you have an in-house team to handle technical complexity. Otherwise, choose hosted payment gateways.
  • Consider chargebacks, international fees, setup fees, and other long-term fees. The maintenance cost for the payment gateways may increase with the volume of online transactions.
  • Ensure your payment gateway complies with the necessary security protocols, such as PCI DSS, GDPR, MFA, etc.
  • Your payment gateway solution must be compatible with the current software and support multiple payment processing solutions.
  • Lastly, your payment gateway system must support multiple currencies for an international audience. A local bank integration facility gives you leverage to target a particular market.

Comprehensive Guide on Payment Gateway Integration Process for Your Website

Read the steps below for a successful payment gateway integration to your eCommerce or fintech website.

Payment Gateway Integration Process

Step 1. Select Your Payment Gateway

eCommerce payment gateways are in high demand as the popularity of digital payments rises. Research for the payment gateway model that fits your business goals and offers scalability. As a fintech app owner, you must consider the transaction fee and cross-border fee if you are open to international payment gateways, compatibility, and security protocols.

Step 2. Merchant Account Setup Process

Next, set up a merchant account on the platform for online payment gateway integration. For Stripe and PayPal payment gateway integration, you can easily set up the merchant account following their in-app instructions and support.

Step 3. APIs for Secure Communication

Once the merchant account setup process is complete, you will need the APIs for secure and seamless communication. The platform-compatible APIs allow interaction between the business website and the payment gateway’s server.

Step 4. Payment Gateway Integration Process into the Website

There are two ways to integrate payment gateways:

  1. E-commerce websites like Shopify and WooCommerce provide plugins and extensions to integrate payment gateways into the website.
  2. You can manually add code to your website.

Therefore, the best course of action depends on your business model and operations.

Step 5. Test the Payment Gateway and Go Live

Use the sandbox testing method to evaluate your payment gateway app’s performance. Once the payment gateway system meets market standards, you can go live.

Further, you must update the payment gateway solution regularly for robust security and high performance.

Step-by-Step Process for the Payment Gateway Integration into Your Mobile App

Payment Gateway Integration into Your Mobile App

The popularity of mobile transactions, contactless payments, and instant payments has been rising after the pandemic. In the United States alone, people use smartphones to pay for everything.

Further, Apple Pay and Google Pay get prioritized for digital payments in the USA. People also prioritize PayPal and Google Wallet over credit/debit cards to pay in a few clicks.

Are you intrigued by how to integrate a payment gateway into your mobile app?

Let’s dive deeper into it.

Step 1. Identify Business Needs and Payment Methods

Follow your business needs during the eCommerce payment gateway integration process. Know which type of business model you offer.

  • Does your e-commerce business offer subscription-based services?
  • Do you sell digital products to global customers?
  • Do you provide a multi-vendor facility on your e-commerce platform?

The answer to these questions can help you decide on the right payment processing model. Your e-commerce business analytics also guides you in understanding your customers’ payment preferences. You can add options, including debit/credit cards, bank transfers, and marketing payment offers.

Step 2. Select the Payment Gateway Solution

When you are serving global clients, choose the right payment gateway solution. The decision should also include country-wise popular payment options. You will have two primary benefits:

  • Global payment gateway providers will give you access to a broader audience.
  • Country-specific payment gateway integration will help establish a strong brand presence among locals.

Hence, choose the payment gateway providers that support most currencies, offer lower foreign exchange conversion rates, and have reduced cross-border fees.

Step 3. Comply with Legalities and Protocols

Foreign regulation compliance makes the payment gateway integration process and operation a smooth ride. You must

  • Register your fintech business.
  • Acquire tax identification numbers (TIN, GST).
  • Open a separate bank account for business operations.
  • Verify the KYC number for the required documents.

The legal formalities are necessary for smooth customer onboarding, improved user experience, and establishing credibility.

Step 4. Ensuring Payment Gateway Integration Security

A custom mobile app development company must implement all the security measures to build a secure payment gateway solution. It includes:

  • Protecting the fintech app from cyber threats.
  • Well-optimized checkout experience to lower the churn rate.
  • Diverse payment options to improve customer engagement.
  • Real-time tracking for payment processing.
  • Secure HTTPS communication, tokenization, and authentication.
  • Provide a platform-specific payment gateway API integration.

Well-planned payment gateway security measures ensure smooth payment processing and improve ROI.

Step 5. Test and Deploy the System

Payment gateway developers use the sandbox method for standard testing. Sandbox testing is an integral part of payment gateway integration services. Developers test fintech applications, files, or code to analyze their behavior.

These tests in a virtual environment help developers understand the app’s efficiency, stability, and effectiveness in the real environment. Once tests are complete, it’s time to deploy the payment gateway API to the client site. Once deployed, monitor it regularly after it goes live.

Step 6. Monitoring Payment Operations and Scalability

Once the payment gateway system is operational, developers continuously monitor performance. They upgrade the system based on user feedback, glitches, or new technological advancements.

Expanding the payment gateway solution to a new market is not easy. You must comply with new protocols, strategize marketing campaigns, and provide facilities according to users’ needs. So, you can deliver a seamless mobile payment gateway integration solution.

Also read: Build Your Own P2P Payment App like Cash App in 2025

Successful Stripe Payment Gateway Integration with Konstant

Konstant Infosolutions has been a trusted partner that offers result-driven payment gateway integration services to its global clients. The company can help you optimize iOS and Android payment integration, such as Apple Pay using Stripe. They give access to a talented team of project managers, developers, designers, and analysts.

Besides Stripe, we offer diverse fintech solutions, including Square and PayPal payment gateway integration, to help businesses handle an influx of customers. Their team will also help you with WooCommerce, BigCommerce, and Shopify payment gateway integration services. This fintech app development company provides solutions tailored to your needs and ensures that success knocks on your door.

Also read: Stripe vs Braintree: Which Payment Gateway Is the Best for Your Business?

Final Thoughts

In this digital world, customers prefer digital transactions over cash payments. Therefore, choosing the right payment gateway is essential for businesses. Whether you belong to the finance, real estate, eCommerce, beauty, fashion, or manufacturing industry, a smooth payment system is necessary to make sales online.

You can offer customers integrity, a secure network to process payments, appealing deals, user-friendliness, and more. If you have decided to build a custom payment gateway, you can overcome all the restrictions that commercial payment gateways offer.

You can find a trusted payment gateway integration company and build an efficient, modern payment solution. Let’s not forget that new technologies like AI, ML, blockchain, cloud computing, big data, and AR/VR are soaring. They could help you build your dream payment gateway solution.

For more information, contact our experts now and get a free consultation.

FAQs

What are the key payment gateway service providers?

Top payment gateways in the USA are Stripe, PayPal, Amazon Pay, Skrill, Payza, Net, Razorpay, Paytm, PayU, and Braintree.

How do you ensure security in payment gateways?

These are four ways to ensure security in payment gateways:

  • Tokenization
  • PCI certification
  • SSL for a secure network
  • 3D secure authentication

How to estimate the payment gateway integration cost?

The cost of integrating a payment gateway into your website or mobile app depends on development complexity, gateway type, and fee structure. Usually, the payment integration company charges between $25,000 and $100,000 to complete the project.

What is the biggest challenge in payment gateway integration?

Security is the biggest challenge a website development company faces during payment gateway integration. Businesses must adhere to the reformed security laws in particular regions and update their terms and conditions.

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About Author
Vipin Jain

Vipin Jain

Vipin Jain is the Co-Founder and CEO at Konstant Infosolutions and is in charge of marketing, project management, administration and R&D at the company. With his marketing background, Vipin Jain has developed and honed the company’s vision, corporate structure & initiatives and its goals, and brought the company into the current era of success.

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