The payment processing market is projected to reach a value of approximately $198 billion by 2032, a major increase from its valuation of $65.6 billion in 2022. This leap underscores the importance of simple, effective, and secure payment processing solutions for businesses that accept online payments.

As customer expectations for diverse payment methods and a smooth payment experience continue to rise, businesses are assessing a growing number of payment processing options. Some are considering whether they should create their own payment gateway. By developing this custom solution, businesses can gain greater control over their transactions, improve the customer experience, and reduce transaction costs. However, creating a payment gateway is a complex process and requires careful planning and execution.

Below, we’ll cover how to create your own payment gateway, including the pros and cons of building it yourself and possible alternatives.

What’s in this article?

• What is a payment gateway?
  
• How to create your payment gateway
  
• Pros and cons to building your payment gateway
  
• Alternatives to creating your payment gateway
  
• How Stripe Payments can help
  

What is a payment gateway?

A payment gateway is a technology used by businesses to accept card and digital wallet payments from customers. The term includes the physical card readers found in brick-and-mortar retail stores as well as the online counterparts that take care of the payment process for ecommerce, mobile commerce, and other card-not-present (CNP) transactions.

Payment gateways facilitate communication between the different components involved in the transaction process. They send credit card information from the business’s website to the credit card payment networks for processing, and they return transaction details and responses from the payment networks back to the website.

How do payment gateways work?

Payment gateways and processors function as intermediaries between businesses and customers, ensuring each transaction is carried out securely and promptly. The process typically includes several steps, starting when the customer makes a payment for goods or services and ending when the business receives the payment.

Payment gateways have several important responsibilities during the transaction process, including:

• Encryption
  When a customer places an order, the gateway encrypts the payment information before sending it to the business's web server. From there, the gateway sends the transaction data to the payment processor used by the business's acquiring bank.

• Authorization requests
  The payment processor sends the transaction data to a card network, which routes it to the bank that issued the customer's card to authorize or decline the transaction.

• Filling the order
  The processor forwards an authorization related to the business and customer to the payment gateway. Once the gateway obtains this response, it transmits it to the business’s website (or another interface that processed the payment) to complete the payment process. If the transaction is approved, the business can fulfill the order.

• Settlement
  At the end of the day, the business sends a batch of all approved authorizations to its acquiring bank for settlement. The bank deposits the total of the approved funds into the business's nominated account. This part of the process could take place daily, weekly, or on another agreed-upon schedule.

By providing a secure pathway between the customer, the business, and the payment processor, payment gateways ensure smooth, secure, and quick online transactions. Payment gateways also use various security measures, such as SSL encryption and fraud prevention tools, to protect sensitive data such as credit card numbers and other personal information.

How to create your payment gateway

Building your own payment gateway is a complex task that requires a significant investment of time, resources, and technical expertise. Here's a rough outline of the process:

1. Define your business requirements
   This includes identifying your target audience, understanding the transaction volumes you expect to handle, determining which payment methods and currencies you want to support, and more.

2. Stay compliant and secure
   You will need to ensure that your gateway complies with all relevant financial regulations, including PCI DSS (Payment Card Industry Data Security Standard). This will probably involve obtaining certain certifications and regularly auditing your systems to ensure ongoing compliance. In addition, you'll need to implement robust security measures to protect sensitive customer data and prevent fraud.

3. Build relationships with financial institutions
   Your payment gateway will need to integrate with banks and credit card companies. This means forming partnerships with these institutions, which can involve lengthy negotiations and complex contractual agreements.

4. Develop the necessary software
   Next, you'll need to develop the software for your payment gateway. This will probably involve hiring a team of experienced developers and could take anywhere from 6 months to a year, depending on the complexity of your requirements. These engineers should employ payment API best practices and industry standard coding language, such as Java or Python.

5. Test your gateway extensively
   Once the software is developed, it will need to be rigorously tested to ensure it works as expected and can handle the transaction volumes you anticipate. This stage may also involve resolving any bugs or issues that are identified.

6. Deploy your gateway, and then maintain it
   After testing, you can deploy your payment gateway. You'll need to maintain and update the software on an ongoing basis, troubleshoot any issues that arise, and provide customer support.

Pros and cons to building your payment gateway

Creating your own payment gateway comes with a range of considerations and challenges. Here are some of the most common ones:

While the benefits of an in-house gateway can seem compelling, it’s important to weigh them against the capabilities of modern “Payment-as-a-Service” providers.

• The payment provider factor
  Many perceived benefits of building your own payment gateway can be addressed by advanced providers. For example, Stripe currently supports more than 135 currencies and dozens of local payment methods, which satisfies the needs of most global businesses without the overhead of a custom build.

• The maintenance trap
  A payment gateway is never “finished.” It requires a dedicated team for ongoing maintenance, responding to evolving cyber threats, and updating software to meet shifting global financial regulations.

• Security expertise
  Beyond standard software development, building a gateway requires specialized expertise in cryptography, tokenization, and real-time fraud scoring. A single data breach can result in catastrophic financial penalties and permanent loss of brand trust.

For many organizations, the most practical middle ground is a hybrid approach: using a highly customizable third-party API that allows for a “bespoke” feel while the provider handles the heavy lifting of compliance, security, and banking relationships.

Alternatives to creating your payment gateway

While creating your payment gateway can offer significant benefits, it's not an easy or straightforward process. As a result, many businesses look for simpler, more cost-effective solutions.

Partnering with a payment service provider (PSP), for example, can allow a business to offload compliance risks and technical hurdles while maintaining a high-performance checkout experience. Additionally, many payments providers also support local payment methods, making it easier to scale globally.

One solution is Stripe, which allows businesses to handle online transactions without building their payment gateway or forming partnerships with banks or credit card companies.

How Stripe Payments can help

Stripe Payments provides a unified, global payments solution that helps any business—from scaling startups to global enterprises—accept payments online, in person, and around the world.

Stripe Payments can help you:

• Optimize your checkout experience: Create a frictionless customer experience and save thousands of engineering hours with prebuilt payment UIs, access to 125+ payment methods, and Link, a wallet built by Stripe.
  
• Expand to new markets faster: Reach customers worldwide and reduce the complexity and cost of multicurrency management with cross-border payment options, available in 195 countries across 135+ currencies.
  
• Unify payments in person and online: Build a unified commerce experience across online and in-person channels to personalize interactions, reward loyalty, and grow revenue.
  
• Improve payments performance: Increase revenue with a range of customizable, easy-to-configure payment tools, including no-code fraud protection and advanced capabilities to improve authorization rates.
  
• Move faster with a flexible, reliable platform for growth: Build on a platform designed to scale with you, with 99.999% historical uptime and industry-leading reliability.
  

Learn more about how Stripe Payments can power your online and in-person payments, or get started today.