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Introduction to E-Commerce Payment Systems

E-commerce is probably the only industry that grows almost a quarter each year, according to a study by BigCommerce. People love to shop online and prefer this way of shopping. The global crisis hardly can be a major factor in this trend. In 2020, people not only love to shop online but are also forced to do so due to the coronavirus. In any case, businesses in many industries that are embracing their online presence are future proof and protected from an emergency when everything is closed. One of the ways to achieve that is to work on the electronic payment systems that the business is using.

The Definition

An E-payment system is a system that allows your customers to pay for products and services online. This complex mechanism works with the purchaser, merchant, purchaser’s bank, merchant’s bank, payment processor, and payment gateway.

Types of Electronic Payment Systems

Depending on the electronic payment method, E-payment systems can be divided into:

  • Cash Payment Systems that include Direct Debit and E-Checks.
  • Credit Payment Systems that include Credit Cards and E-Wallets.

Of course, cash will be around for a long time — but according to WorldPay, the global part of E-payment transactions, including credit cards, debit cards, and mobile wallets, will increase to 83% by 2022. Here is some additional information from Infopulse on how the total transaction value of digital payments will grow.

Total Transaction Value in Digital Payments

These statistics illustrate exactly why you should pay attention to how electronic payment processing is happening in your business, and what you can do to improve it. Let’s talk about it!

How the E-Payment System Can Help Your Business to Earn More

Every case is unique and outcomes can differ. However, using the best electronic payment system solution available can benefit any business to a certain extent. Here’s how:

Revenue Opportunities

This is probably the biggest point of them all — E-Payment Systems are providing customers with a variety of options to pay, which opens up more opportunities to collect revenue. The easier and more diverse purchasing options that are available, the more likely your revenue flow will increase.

Automated Processes

When electronic payment processing is happening automatically, there is no room for a mistake by a human employee. It saves a lot of time and effort for the business and allows the setting up of recurring payments like subscription programs.

Greater Flexibility

You can easily offer special promotions, discounts, or do a quick price change according to your latest marketing insights and ensure you can get as many sales as you can.

Improved Security

At first glance, using an electronic payment system in E-commerce seems like a weak point in terms of security, but you will also get access to the latest technology to protect your transactions as much as possible. Also, E-commerce fraud detection and prevention standards are very high in these systems. With the right approach, it could serve as a cost-saver by detecting fraudulent transactions.

Engaging a New Audience

You can make your business available for a new audience by accepting payments from all over the world or including certain payment methods that are popular in your target regions.


Explore this article to find out how much does it cost to build a marketplace in 2020!

Marketplace Development

6 Ways in Which E-Payment Systems Improve the Customer Experience

“Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong.”

– Donald Porter, British Airways

Now, let’s take a look at the benefits from your customer’s perspective:

Simplified Process

With solutions like Amazon 1-Click Ordering, where all the customer needs to do is to push one button to buy or use Apple Pay (where the smartphone is required to be placed against the sensor), a new level of convenience has already arrived. If your business supports these types of solutions, you will make it much easier for your customers to buy your products or services.

Eliminating Repetitiveness

If your system still requires a customer to put in personal information each time that they make a purchase, you can optimize this process. For example, by introducing an option that allows clients to save payment information and not have to re-enter it with the next order. You can also introduce the auto-pay approach, like Spotify and Amazon Prime did, to ask your customers for the required information only one time — when they register.

Instant Notifications

Using an electronic payment system in E-commerce allows customers to get instant notifications on whether a transaction has been complete and when they receive the products.

Minimizing Human Contact

When you set up your electronic payment system to provide a customer with all essential functions like balance, credit information, or transaction history without the need to contact your team members, it creates an additional layer of convenience. If the customer needs to contact your business, you can set up a chatbot (a great example of using Machine Learning in Finance and E-Commerce) which is available 24/7 to show your clients how much you value their time.

Providing Various Options

This is not only a revenue driver, but also a way to improve the customer experience. Let your clients choose between credit cards, bank transactions, or maybe even cryptocurrencies and they will pay you with loyalty and respect!


Having these multiple options, however, creates a problem — your business is now vulnerable to hackers. But if you use a third-party service to verify PCI compliance and make sure you are doing everything to protect the client’s information, you can build a reputation as a secure business. This will help build a strong brand image in the long run and make it easy for your clients to recommend your business to others because they will feel safe making purchases.

How Does Electronic Payment Processing Work?

We have discussed the importance and benefits of having a modern electronic payment system; now, let’s dive into specifics. Whether you run a marketplace, own a big E-commerce business, or represent any other industry online, you need a payment solution that will help you and your customers get all the benefits mentioned above.

To accept and process E-payments online, businesses need an E-payment gateway. This is a service that is used for both online and brick-and-mortar stores and enables transactions between buyers and sellers. The gateway is protected with security protocols and encryption to provide the safest transactions possible between all parties. Determining what gateway you will choose also defines what currencies your business can accept, the cost of transaction fees, and the speed of transactions.

Payment Gateway in Action

The role of an E-payment gateway in payment processing is very sophisticated and includes several tasks that must be executed in mere seconds. Let’s take a closer look at payment processing:

  1. After the buyer puts in all the required information and pushes the button to finalize the purchase, the data is sent to a seller’s web server through an SSL connection.
  2. The seller’s web server receives this data and forwards it to the payment gateway through a different encrypted SSL channel.
  3. The gateway sends data to the payment processor, which can deliver information between the seller’s web server and payment gateway.
  4. The payment processor passes the information to a card network (for example, Visa or Mastercard) to verify the transaction.
  5. After that network receives the data, they decide whether to accept or deny it. When the decision is made, the issuer bank sends back a code to the payment processor.
  6. The payment processor shares the status of the transaction with the payment gateway, and the payment gateway forwards it back to the seller’s web server.
  7. The buyer receives a message about the acceptance or the denial of his purchase transaction through the interface of the E-commerce payment system.
  8. In most cases, the issuer bank transfers money to the seller’s account the next day.

Now that we have explained the process, it’s time to decide how to integrate the gateway to provide payments for an E-commerce website.

Choosing the Best Way to Integrate an E-Payment Gateway

There are three methods to integrate a payment gateway; the best fit will depend on the size of your business.

Small business owners will probably prefer the Hosted Payment Gateway method if they are fine with processing the payment externally. Like in the previous case, no PCI compliance is required, as all the processing is handled by the service provider. This method is simple and fast to integrate. However, the drawbacks here are quite significant —you can’t control a hosted gateway. To make a payment, customers must leave your website — this is not good in terms of conversion and marketing in general. Additionally, some buyers may be suspicious about going to third-party websites, which weakens your brand image. On the other hand, integration is easy — all you need to do is to add JavaScript code, which will serve as your “Buy” button and direct the customer to the third-party website to make a transaction.

Businesses of any size can use the Direct Post method. After the purchase, the data instantly gets to the gateway and processor. You don’t need to have PCI compliance, because your platform will be used only for shopping and none of the money transaction details will be on your server. With this approach, you will have room for branding and customization options; also, a customer won’t leave your website for the purchase. The downside is that Direct Post is not the safest method in terms of security. To integrate this way, the vendor must make an API connection between a payment gateway and the shopping cart on your website to transfer the information.

If you have a medium to large sized business, your brand image and user experience are very important and are crucial factors in revenue and potential growth. That’s why the integrated method can work best here. This approach will keep your customer on your website all the time and you will get complete control over the payment process. You will be able to adjust and customize the payment system just as you want. The main drawback is because you need to support a payment system yourself, it could get very expensive. You will store the financial information of your customers, so you need to get PCI compliance to even be able to do that. If you have custom features in mind, they may be quite sophisticated to implement. You need a team of experts to successfully execute the integration and add APIs to your server. While vendors offer detailed guides on this process, it is better to find the right team to perform it.

The Importance of Having PCI DSS Compliance and How to Get It

Among the aforementioned approaches, only the integrated method requires a business to be PCI DSS compliant. Payment Card Industry Data Security Standard (PCI DSS) was first introduced over 15 years ago and now it is mandatory for everyone who wants to process card payments. There is no other option other than to be PCI compliant if you want to work with credit card transactions on your server. Obtaining compliance looks like this:

  • First, you should be aware of your level of compliance. There are four of them and they are defined by the volumes of safe transactions your business has provided. All transactions should be done through Visa, MasterCard, American Express, or Discover — the four original creators of the security standard.
  • Then you should learn about PCI requirements via the PCI Self-Assessment Questionnaire. Currently, there are a dozen of them.
  • After that, you must take a test called the Attestation of Compliance (AOC). Choose the one that is most suitable for your business from the available categories.
  • The next step is the External Vulnerability Scan procedure. There are many approved vendors for this; you can learn about them here.
  • The last step is sending all of your documents, which you will get through this process, to the acquirer bank and card associations.

Picking the Most Suitable Electronic Payment System

Currently, there are hundreds of payment solutions available for business owners. How do you decide which one is the best for your business? Here are some tips for you to make a decision.

Learn About the Reputation

The first move is to learn about the history and reputation of a particular payment solution. With market leaders, it is quite easy, because of all the positives and negatives are simple to find. But if you need some special payment system that is not so well-known, you should spend some time reading the reviews.

Compare Fees

The pricing structure can be very different, and you should be aware of the hidden costs. Rigorously study the setup fees, monthly fees, and transaction fees to know the final price. Also, there could be some additional services or plugins that you might use in the future when you decide to grow your business.

Ensure Security

As we discussed earlier, this is one of the most important factors for the decision. The solution must ensure PCI DSS compliance to effectively protect the transaction data and customers’ information — this is standard. Of course, if the payment solution provider offers something more like Fraud Detection with ML, this is only a plus!

Make Sure the System Supports the Payment Methods You Need

Undoubtedly there are leading payment methods like PayPal, E-wallets, or debit cards, but that doesn’t mean you should limit your business to them. Sure, your gateway must support the main payment methods available in your area — but keep in mind potential international growth and think about providing multi-currency support.

Think About Merchant Account Possibilities

A merchant account is opened in the acquiring bank which the merchant wants to use for transaction processing. Some payment gateway providers offer that account as part of their service, so you should evaluate this option if you don’t already have one.

Top 5 E-Commerce Payment Systems to Choose From

From the impressive variety of available payment gateway providers, here are the five most popular options that are also available in most countries.

 PayPalAmazon PayStripe2CheckOutAuthorize.net
Payment Methods
PayPal, Apple Pay, Android Pay, Venmo, Bitcoin
Amazon PayAliPay, Apple Pay, Android Pay, Bitcoin, WeChat, ACH, EPSPayPal, ACH, WebMoney, Payoneer, WeChat, WirePayPal, Apple Pay, E-check, Visa Checkout
Credit/Debit Card Support
Visa, MasterCard, American Express, JCB, AMEX, Diners Club
Visa, MasterCard, American Express, JCB, Diner's, NYCE, STAR, China Union, EuroCardVisa, MasterCard, American Express, AMEXVisa, MasterCard, American Express, JCB, DiscoverVisa, MasterCard, American Express, JCB, Discover
Setup Fee

Monthly Fee$30 Payments ProNoNoNo$25 Gateway Fee
Transaction Fee2.9% + $0.302.9% + $0.302.9% + $0.30, ACH/Bitcoin Processing 0.8%3.5% + 0.35%2.9% + $0.30
FeaturesAVS, SSL, CCV, Virtual TerminalAVS, SSL, CCVAVS, SSL, CCV, Virtual TerminalAVS, SSL, CCVAVS, SSL, CCV, Virtual Terminal
Chargeback$20$20 + Taxes$15-$25
Number of Available Countries202+78+25200+20+
International Transaction Fee3.9% + Currency-Based Fee3.9% + $0.303.9% + $0.30--

What Payment Methods Your Business Needs to Support, Depending on Your Target Location

E-Payment Methods

Selling overseas might not be a priority in your strategy, but for online retailers, it’s easy to expand on the global market. Buyers tend to buy the items they can’t find in their countries on international websites. Cross border online purchases are expected to reach $1 trillion this year, so here are the most popular E-payment types your gateway needs to support in certain regions.

The United States and Canada

Cards are popular here, including Visa, American Express, Mastercard, JCB, and Discover. The most popular E-wallet service Apple Pay is a must, but you should consider other options like Android Pay and Visa Checkout. ACH Payments are exclusive to the United States and are popular there. It is also important to have a Bank Transfer option.

Latin America

While Visa and Mastercard are widely accepted, almost half of customers prefer to buy via local cards like Diners Club or Hipercard. Speaking of E-wallets — Masterpass, PayPal, and Visa Checkout must be enough. Additionally, you must consider Local and USD Bank Transfers and the Brazil-exclusive Boleto Bancario.


For the European market, be ready to provide the most popular cards and types of E-wallets (the top gateway providers have them). But depending on the region, you must be aware of local specifics. For example, in Germany, the most popular payment method is Giropay Bank Transfer.

Asia Pacific

This giant market is available for those who offer the most common card types as a payment method. In the E-wallets realm, there are two undisputed leaders — Alipay and WeChat Pay; you can’t enter the Asian market without them!

Building a Custom E-Payment Gateway

Yes, there is a large number of solutions available. However, for large-scale businesses, there is a reason for developing a custom payment gateway. If your business has millions of transactions per year, developing your system can quickly become beneficial.

There are three major benefits in doing this:

  1. Saving on fees and sign-up costs.
  2. Full flexibility to customize a solution.
  3. Option to offer your custom gateway as a separate product.

Among the drawbacks, you will have to deal with the settlement reports yourself and the system will require a significant time to launch. But the biggest concern is the price of development and certification. The development of a custom E-commerce payment system, according to market prices, could be up to $800,000. You need to have at least $150,000 for the project to cover all expenses.

If you have big enough business to cover the expenses, here are the steps you should take to create a custom system:

  • Register through your bank as a payment gateway service provider.
  • Contract with multiple banks as payment processors to your system.
  • Develop an API and write matching documentation according to PCI DSS compliance standards.
  • Implement all required security measures and fraud protection mechanisms to get PCI DSS certification.
  • Integrate separately the additional payment methods you might need — for example, PayPal.
  • Create a web application that will serve as an admin panel for the system.

Our Experience Implementing E-Payment Systems in a Marketplace Platform

SPD Group has been maintaining and developing a marketplace platform for more than 10 years and it supports over 20 payment systems. Every payment system we added opened opportunities for sellers to acquire new clients. Smaller clients of the platform could use existing payment solutions, but the large-scale ones preferred to connect the banks they were partnering with and include the payment methods they use.

The necessity to add local payment methods was often a reason for the addition of a new payment system. We have an experience of integrating to the platform local payment systems from the following countries: Denmark, Netherlands, Poland, Greece, United Kingdom, Norway, Spain, Philippines, United Arab Emirates, Canada, and the United States of America. We had different challenges while integrating each of them. As an example, the Polish payment system sometimes required significant time for accepting a payment because of required manual processing in some cases — but we found the proper solutions for the best user experience even in such cases.

Our platform uses all three payment gateway integration methods — Direct Post, Hosted Payment Gateway method, and Integrated method for different payment systems. Sometimes it is possible to offer to the client two payment gateway integration methods for a single payment system. It was a real technical challenge to make all possible options work properly on the platform because of the different flows for each of them. Hosted Payment Gateway was the hardest one in terms of having a good UX, because we couldn’t control the process entirely. We had to work on cases when payments failed and figure out how to notify clients if the payments were delayed.

3-D Secure integration was another obstacle we had to overcome. 3-D Secure is a protocol designed to provide an additional layer to the security of credit and debit card transactions online. Unfortunately, it had some major problems with the mobile user experience. When the client left our platform and moved to a 3-D Secure frame, the frame wasn’t shown correctly on mobile screens. This issue could be a factor in buying decisions, because it looked suspicious and was inconvenient. That’s because banking systems, in general, are slow to change for the current market situation. We can’t change that, but we did our best to make a 3-D Secure page look good on all mobile devices and make it feel just as optimized as our platform.

So, what is the best payment system to choose? Based on SPD Group’s experience, it makes sense to look for systems that are growing at a fast pace. You can choose a well-established payment system, but if it doesn’t keep up with the innovations in the Fintech industry your business will ultimately lose customers due to nuances for the client in the payment process. There are a lot of convenient Fintech projects emerging on the market today that make the payment process easier and more flexible for the client; don’t miss out on them!


What is the role of an online payment system in E-commerce?

Online payment systems play a deciding role in the success of an E-commerce business. The rigorous approach to adjusting your system to particular markets can pay off in revenue and more clients.

What is a third-party payment system?

A third-party payment system, payment processor, or gateway allows your business to receive payments without setting up a merchant account with a bank.

What is the best online payment system?

The best online payment systems for your business are those that adhere to the latest security standards, support the payment methods you require, and provide the best user experience for your customers. It’s hard to pick a single best online business payment system, because you will need multiple payment systems to reach the biggest audience possible.

How can E-payment systems help your business earn more?

By introducing a variety of payment options, improving automation, flexibility, and covering new audiences.

What are the advantages of using a digital payment system?

The biggest advantage is that your business can cover the global market for particular products by being able to accept payments in multiple currencies. It also elevates the level of security for transactions and improves the overall customer experience.

How can a payment system improve the customer experience?

By protecting customer data from fraudulent activity, minimizing repetitiveness and the need to talk to human experts, and memorizing transaction data.

What do I need to look for while choosing a payment gateway?

The most important aspects are security, payment methods, fees, and available countries.


If your business is represented online and your goal is to earn more revenue, build a brand image, and improve the customer experience, it is worth paying attention to improving your payment systems. Using the services from payment gateway providers and adjusting them to your needs can help your business grow even in the most challenging times.

E-payment solutions can offer businesses such benefits as new revenue opportunities, process automation, greater flexibility, improved security, and engaging a new audience.

They can simplify processes, eliminate repetitiveness, provide instant notifications, minimize human contact, offer multiple options and ensure security.

The Top-5 includes PayPal, Amazon Pay, Stripe, 2CheckOut, and Authorize.net.

Further Reading

  1. 7 Top Ecommerce Payment Gateways – https://elogic.co/blog/7-best-magento-2-payment-gateways/
  2. Overview of Payment Processing – https://www.infopulse.com/blog/overview-of-payment-processing-trends-and-top-solutions-for-business/
  3. The emergence of Payment Systems in the Age of Electronic Commerce – http://globip.com/contents/articles/globalinternational-vol2-article2.pdf
  4. 7 Electronic Payment Systems – https://www.medien.ifi.lmu.de/lehre/ws0910/mmn/mmn7.pdf


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