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Payment Gateway vs. Payment Processor Guide

If you plan to accept credit cards online, you’ll need these services. Hub: Business Finances > Business Payments

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Written by: Jennifer Dublino, Senior WriterUpdated Jun 06, 2025
Shari Weiss,Senior Editor
Business.com earns commissions from some listed providers. Editorial Guidelines.
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Payment gateways and payment processors are related but distinct elements of credit card processing. You’ll likely need both services if you plan to accept credit card payments online, so understanding each is critical to making the right choice for your small business.

This guide will explain how payment gateways and payment processors fit into the credit card processing landscape. 

Editor’s note: Looking for the right credit card processor for your business? Fill out the below questionnaire below to have our vendor partners contact you about your needs.

What’s the difference between payment gateways and payment processors?

Here’s an at-a-glance look at the differences between payment gateways and payment processors:

Task/use

Payment gateway

Payment processor

Card-present transactions

Can be entered in a virtual terminal

Card inserted into a POS system or credit card reader

Card-not-present transactions, such as e-commerce and phone sales

E-commerce transactions processed online or entered into a virtual terminal

Can be entered into a POS system when the card’s chip or magnetic strip cannot be read properly

Encryption of information, sending transaction data to be processed

Yes

Yes

What is a payment processor?

A payment processor is a company that handles a business’s credit card and debit card transactions and moves funds from one account to another. If you want to accept credit card and debit card payments from your customers online, over the phone or at the point of sale (POS), you must partner with a payment processor.

Payment processors can be categorized into front-end and back-end processors.

  • Front-end processors: Front-end processors maintain connections to card networks and settlement services, and they manage merchant accounts on behalf of their clients. 
  • Back-end processors: Back-end processors primarily settle the transactions, moving money from the issuing bank (the customer’s account) to the merchant bank, which ultimately transmits funds to the business’s bank account when the transaction is finalized.

What is a payment gateway?

A payment gateway facilitates online payment app and card transactions in which a credit card is not physically present. The technology creates a secure connection between your business’s website and the credit card processing company to move encrypted data. 

Here’s how a payment gateway works: 

  1. The buyer makes a purchase with a credit card through a virtual terminal or an online store. 
  2. The payment gateway’s secure connection encrypts credit card payment data and pushes it to the acquiring bank.
  3. The payment gateway determines which credit card network is involved and routes the transaction information to the issuing bank.
  4. The issuing bank verifies the authenticity of a transaction and determines if the buyer has enough credit remaining to cover the transaction amount.
  5. The issuing bank sends the approval or rejection of the transaction to you through the payment gateway.

You can typically set up a payment gateway with your chosen credit card processing company. Some credit card processors have their own payment gateways, while others work with third-party payment gateways, such as Authorize.net, on behalf of their client businesses.

TipBottom line
Always check a provider’s terms and conditions and understand credit card processing rules and laws before signing up. It’s best to understand how much you’ll pay upfront, monthly and per transaction.

Do I need both a payment gateway and a payment processor?

To accept credit and debit cards online, you’ll likely need both a payment processor and a payment gateway, said Emilis Armonas, head of product at ConnectPay. 

“A payment gateway is necessary to interface with customers, while a payment processor handles the behind-the-scenes movement of funds,” Armonas said. “However, in some cases, businesses may only need one or the other depending on their payment methods. For example, businesses accepting only bank transfers or PayPal may not need a traditional payment processor.”

You may be able to forego a payment gateway if you only intend to accept credit and debit card payments via an in-store point-of-sale (POS) system. However, virtual terminals accessed through your computer require a payment gateway. [Learn about the best POS systems]

Did You Know?Did you know
According to Mastercard, small businesses that accept digital payments achieve profitable growth nearly twice as fast as businesses that do not accept digital payments.

How do I choose a payment processor or a payment gateway provider?

Once you know whether your business needs a payment processor, payment gateway or both, you’ll need to research your options to choose the right provider(s) for your needs.

The best credit card processor for your business will provide the services and features you need with reasonable fees. The processors include excellent options for low- and high-volume businesses and organizations with unique needs, including high-risk credit card processing

Frank Pagano, executive sales director at VizyPay, advised considering the following when searching for a payment processor:

  • POS hardware that suits your business needs and customers’ preferred payment methods, such as those that accommodate mobile payments, contactless payments, desktop or tabletop payments.
  • API integrations.
  • Security and compliance safeguards.
  • An easy-to-use interface.

Armonas added that processing speed and compatibility with major credit card companies like Visa and Mastercard are essential.

If you’re looking for a payment gateway, Armonas recommended looking for these features:

  • Support for a wide range of payment methods, including credit cards, bank transfers, PayPal and local options tailored to your target market.
  • An intuitive interface that provides a seamless user experience for you and your customers.
  • Integrations with your e-commerce platform.
  • Compatibility with your existing systems.

To get started on your search, check out our Clover review and our review of National Processing. If you’re specifically interested in mobile credit card processing, consider Android payment apps and other methods of accepting card payments on your phone. [Learn how to accept payments with an iPhone]

Bottom LineBottom line
When choosing a payment processor or gateway, ensure that it supports all of your business’s needs, including a range of payment methods, compatibility with your existing systems and an easy integration process.

Payment gateway vs. payment processor FAQs

A merchant account is an arrangement with a bank that creates a space for pending transactions. Funds are held in a merchant account before being credited to your business’s bank account. Unlike a payment gateway, a merchant account doesn’t transmit encrypted data. Instead, it transmits funds related to the transaction. The payment will be held temporarily in the merchant account as the transaction is finalized. After that, the funds will pass through the merchant account and into your business’s bank account. Read our review of Square and our Stripe review to learn how the services can act as payment facilitators.
Stripe is a payment processor that includes a payment gateway and merchant account. That enables Stripe’s merchants to accept payments online, in person, without a card present and with no additional companies or services needed.
Amazon Pay is an online payment processor that allows Amazon customers to buy from a business’s website using their Amazon accounts. To add the payment method to your site, you must set up an Amazon Pay account, configure the service and integrate it into your website.
Technically, it’s neither. PayPal is a payment aggregator, which differs from traditional payment processors in that it offers faster setup without requiring a merchant account. Aggregators use fixed pricing regardless of volume and bundle transactions under a shared account—though they are often more risk-averse and prone to account holds. When you accept credit card payments with PayPal, they go through PayPal’s payment gateway called Payflow. Read our detailed PayPal review to learn why it’s a popular payment processing choice for freelancers, solopreneurs and other small businesses.
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Written by: Jennifer Dublino, Senior Writer
Jennifer Dublino is an experienced entrepreneur and astute marketing strategist. With over three decades of industry experience, she has been a guiding force for many businesses, offering invaluable expertise in market research, strategic planning, budget allocation, lead generation and beyond. Earlier in her career, Dublino established, nurtured and successfully sold her own marketing firm. At business.com, Dublino covers customer retention and relationships, pricing strategies and business growth. Dublino, who has a bachelor's degree in business administration and an MBA in marketing and finance, also served as the chief operating officer of the Scent Marketing Institute, showcasing her ability to navigate diverse sectors within the marketing landscape. Over the years, Dublino has amassed a comprehensive understanding of business operations across a wide array of areas, ranging from credit card processing to compensation management. Her insights and expertise have earned her recognition, with her contributions quoted in reputable publications such as Reuters, Adweek, AdAge and others.
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