How to Choose and Integrate Payment Gateway: Online Payments, Transaction Processing, and Payment Gateways Providers

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Whether you are an eCommerce platform owner or fair maintaining your on-line bearing, you want to offer your customers a safe, quick, and easy-to-use payment system. The chosen payment solution has to satisfy both the needs of your customers and your business. so, it has to be protected from fraud, documentation a assortment of requital methods, be commodious to use, and compatible with your platform .
To accept electronic payments and be able to process accredit or debit cards, a merchant uses a requital gateway. Choosing the right requital gateway determines the currencies you can accept, the transaction fee, how fast money gets in your merchant report, and the payment methods you ’ ll volunteer .
According to, over 23 percentage of customers abandon their shop carts because of a complex checkout ( 11 percentage ) system or excessively much information required to complete it ( 12 percentage ). These statistics confirm that choosing the right payment solution supplier is adenine crucial as other aspects of a estimable eCommerce web site. But, in order to choose a payment solution, first base, we need to understand what is a requital gateway and how it works .

What is a payment gateway?

A payment gateway is a service that authorizes and processes payments in on-line and brick-and-mortar stores. A gateway serves as a portal vein to facilitate transaction hang between customers and merchants. It uses security protocols and encoding to pass the transaction data safely. The datum is transferred from websites/application/mobile devices to payment processors/banks and back .
Payment gateways can execute the follow transaction types :
Authorization – a character of transaction used to check if a customer has enough funds to pay. It doesn ’ thyroxine include the actual money transfer. rather, during authority, a merchant ensures that a cardholder is capable of paying for an ordered item. An authorization transaction is used for orders that take time to ship/manufacture .
Capture – the actual process of a previously authorized requital resulting in funds being sent to the merchant ’ randomness report .
Sale – a combination of authority and capture transactions. A cardholder is first authorized. then funds may or may not be captured. It ’ s a regular payment for immediate purchases, like a subscription purchase, or e-tickets .
Refund – the result of a canceled order for which a merchant will have to apply a refund payment work to return the money .
Void – similar to refund but can be done if funds were not yet captured .

Payment processing flow

The infrastructure of on-line payment march is a short bit more complicated than you might imagine. For the customer, it ’ south represented by a small window, or a distinguish web site, where they have to pass through the checkout. But actually, processing involves several fiscal institutions, or tools, verifying the transaction data on both ends, allowing the customer to complete the purchase in a few seconds .
When a customer checks out – passing the wag numeral, termination date, and CVV – a requital gateway has to perform respective tasks, which take about 3-4 seconds :

  1. Customer. A customer presses a “Purchase” button and fills in the necessary fields to pass the transaction data. The data is encrypted and sent to the merchant’s web server via an SSL connection.
  2. Merchant and payment gateway. After the transaction data is received, a merchant passes it to the payment gateway via another encrypted SSL channel. If any of data is stored by a payment gateway, it is settled in a specific type of secured storage. Usually, gateways don’t store actual credit card numbers, but rather save tokens.
  3. Payment processor. The information goes to payment processors. These are the companies that provide payment processing services as third-party players. Payment processors are connected both with a merchant’s account and a payment gateway, transferring data back and forth. At that stage, a payment processor is passing the transaction to a card network (Visa, Mastercard, American Express, etc.).
  4. Visa/Mastercard/American Express/Discover. The role of a card network is to verify the transaction data and pass it to the issuer bank (the bank that produced the cardholder’s credit/debit card).
  5. Issuer bank. The issuer bank also accepts or denies the authorization request. In response, a bank sends a code back to the payment processor, which contains the transaction status or error details.
  6. Payment gateway. Transaction status is returned to the payment gateway, then passed to the website.
  7. Customer and issuing bank. A customer receives a message with the transaction status (accepted or denied) via a payment system interface.
  8. Issuer bank. Within a couple of days (generally the next day), the funds are transferred to the merchant’s account. The transaction is performed by the issuing bank to the acquiring bank.

payment processing
payment process scheme .
now we are moving closer to payment gateways in their diverseness. To integrate a payment system into your web site, you will have to follow multiple steps .

Payment gateway integration

by and large, there are four main methods to integrate a requital gateway. All of them differ by two major factors :

  • whether you must be in compliance with any financial regulation (PCI DSS), and
  • the degree of user experience concerning the checkout and payment procedure.

then let ’ s fall upon what the options are here and which consolidation methods suit your needs .

What is PCI DSS compliance and when do you need it?

In character you precisely need a payment gateway solution and don ’ metric ton plan to store or process credit circuit board data, you may skip this section, because all the work and regulative burden will be carried out by your gateway or requital service provider .
But in sheath you ’ re going to deal with sensible fiscal data, you ’ ll need to comply with some industry regulations. Payment Card Industry Data Security Standard (PCI DSS) is a necessary element for processing wag payments. This security standard was created in 2004 by the four biggest card associations : Visa, MasterCard, American Express, and Discover .
To become PCI compliant, you will have to complete 5 steps :

  1. Define your compliance level. There are four levels of compliance that are determined by the number of safe transactions your business has finished. Transactions count if they were done via MasterCard, Visa, American Express, or Discover cards, and there was a certain number of successful transactions.
  2. Study the PCI Self-Assessment Questionnaire (SAQ). SAQ is a set of requirements and sub-requirements. The latest version has 12 requirements.
  3. Complete the Attestation of Compliance (AOC). AOC is a kind of exam you take after reading the requirements. There are 9 types of AOC for different businesses. The one required for retailers is called AOC SAQ D – Merchants.
  4. Conduct an External Vulnerability Scan by the Approved Scanning Vendor (ASV). The list of ASVs can be found here.
  5. Submit your documents to the acquirer bank and card associations. The documents include the ASV scan report and your filled-in SAQ and AOC.

Given this information, we ’ ra going to look at the existing consolidation options and explain the pros and cons of each. We ’ ll besides focus on whether you must comply with PCI DSS in each case as we explain what consolidation methods suit different types of businesses .

Hosted gateway

A host requital gateway acts as a one-third party. So it requires your customers to leave your web site to complete a leverage. Basically, that ’ s the encase when a customer is redirected to a requital gateway network page to type in their credit poster total. When the transaction data is sent, the customer is redirected bet on to the merchant ’ randomness page. here they finalize the checkout where transaction approval is shown .
hosted payment gateway
Hosted payment gateway work scheme
The pros of a host payment gateway are that all requital process is taken by the service provider. Client batting order data is besides stored by the seller. so using a hosted gateway requires no PCI complaisance and offers pretty easy integration .
The cons are that there is a miss of control over a host gateway. Customers may not trust third-party payment systems. Besides that, redirecting them away from your web site lowers conversion rate and doesn ’ metric ton help your branding either .
How to integrate : consolidation guides are generally loose on the seller ’ randomness websites and the joining happens through an API. For example, PayPal Checkout suggests integration in the shape of a Smart Payment Button. Basically, it ’ s a firearm of HTML code that implements a PayPal push button on your checkout page. It invokes the PayPal REST API calls to validate, collect, and send payment information through a gateway, whenever a drug user triggers the button .
Best fit for : little or local businesses that are more comfortable using an external requital central processing unit .

Direct Post method

direct Post is an integration method that allows a customer to shop without leaving your web site, as you don ’ t have to obtain PCI conformity. mastermind Post assumes that the transaction ’ sulfur data will be posted to the requital gateway after a customer clicks a “ leverage ” button. The data instantaneously gets to the gateway and processor without being stored on your own server .
The pros of this method are equal to an integrate payment gateway. You get the customization options and branding capabilities, without PCI DSS conformity. The drug user performs all the necessary carry through on one page .
The con is that a Direct Post method acting international relations and security network ’ metric ton wholly guarantee .
How to integrate: A seller would set up the API association between your shopping handcart and its requital gateway to post the poster data .
Best fit for: can be used by businesses of all sizes .

Non-hosted (integrated) method

An integrate payment gateway basically means there are no third gear parties involved at the requital check stage of. Companies using integrate gateways obtain PCI DSS conformity, which means they ’ re in charge of storing, securing, and conducting initial confirmation for each transaction. This is done by installing a requital gateway solution available on the merchant ’ s web site .
In some cases, companies can use a white label requital gateway as a non-hosted solution. This is basically a prebuilt gateway that can be customized and branded as your own. here are some well-known white pronounce solutions designed for merchants :
An integrate gateway can be a dedicate source of gross, as merchants that obtain all the necessary complaisance become payment service providers themselves. This means your business can process payments for early merchants for a tip. But, besides the regulative aspect, being a requital gateway supplier brings a technological burden, because you need an infrastructure to safely store transaction data, accredit card tokens, etc .
The pros are that you have full command over the transactions at your web site. You can customize your requital system as you wish, and cut it to your occupation needs. In case of a white-label solution, the payment gateway is your stigmatize engineering .
The cons broadly are all about maintaining the infrastructure of your payment system and the relate expenses. To use an integrated gateway, you have to be PCI compliant first of all, because you will have to store all clients ’ recognition menu data on your own servers. besides, integrating the gateway can be crafty if you want to add custom functionality .
How to integrate : Non-hosted requital gateways are integrated via APIs to your server. consequently, it will require an technology team to perform the integration. Most vendors have well-documented integration guides, API references, or developer portals .
Best fit for : for medium and large businesses that rely heavily on stigmatize and exploiter have .

Choosing a payment gateway provider

now, you can choose a payment solution for your business considering all factors, your business specifics, and your customers. here are some things to consider prior to deciding on a provider.

Study the pricing

requital serve is complex, as it includes several fiscal institutions or organizations. Like any military service, a payment gateway requires a fee for using third-party tools to process and authorize the transaction. Every party that participates in payment verification/authorization or process charges fees. Transactions normally are billed according to the amount, location ( across a certain state or international ), and type of a product ( physical or digital ) .
Every requital solution provider has its own terms of use and fees. normally, you will have the be tip types :

  • gateway setup fee,
  • monthly gateway fee,
  • merchant account setup, and
  • a fee for each transaction processed.

Read all the price software documentation to avoid hidden fees or extra expenses .

Check transaction limits for a given provider

While fees and installation charges are inevitable, there is one thing that may determine whether you can work with a certain provider. Gateway providers set transaction limits as a minimal and maximal measure. Both values are of interest for merchants and their commercial enterprise, as you want to use a unmarried gateway for all the available products .
sol, let ’ s choose for case Stripe as one of the biggest players. Their transaction limit minimal is $ 0.50 and $ 999,999.99 is their maximum. The utmost amount will probably suit the majority of businesses that don ’ triiodothyronine trade bonds or real number estate on-line. But if your business is selling, say, stock music tracks for a price a low as $ 0.10, this may affect your choice even though making a $ 0.10 buy is extremely rare .
The second thing you should pay attention to is daily or monthly transaction limits. These occur pretty rarely, but besides play a huge function for gateway provider option .

Examine merchant account options

A merchant report is an agreement between a merchant and an acquiring trust, by which a merchant allows a bank to process their transactions. additionally, a merchant agrees to follow the operational regulations of credit batting order processing established by credit wag companies .
A merchant account can be opened through banks or payment gateway providers, that offer merchant accounts as a separate of a service. This includes payment processors. If you already have a merchant account, consider what that provider offers. otherwise, it ’ south better to choose a provider that offers a merchant account from the starting signal .

Make sure the gateway supports necessary payment methods and credit cards

As of 2019, the most popular payment methods remain accredit cards, varying from 82 to 69 percentage of all shoppers in different regions according to Statista. second place is occupied by diverse electronic requital methods like PayPal, Union Pay, and Alipay, ranging between 51 and 80 percentage of all shoppers .
In terms of credit cards as a major requital method, you have to make sure a payment gateway accepts all the required credit card networks .
Another aspect is multi-currency support. If your business is international, you want your customers to be able to pay, no topic what currency they use. democratic gateway providers offer multi-currency hold action with or without an extra fee. If you are going to use a host requital system, there are besides localized checkouts available .

Consider mobile payments

While mobile payments are acquiring money from the recognition menu accounts, accepting Apple Pay or Google Pay means supporting a different payment method. In short, mobile payments have their own tokenization serve, and come as a discriminate method acting in all payment gateway services .
Depending on the country you ’ ra running your occupation in, mobile wallets may or may not be available. But the three major applications, Apple Pay, Google Pay, and Samsung Pay, presently support all four chief credit card networks and operate in hundreds of countries. then, you have to scan the provider ’ sulfur page and find the equate data on whether the gateway supports mobile wallets and which ones .
Keep in take care that there are besides different transaction limits set for a given time period, for example, PayPal .

Ensure your product type is permitted by the provider

broadly, there are two types of products considered by providers : digital and physical .
Some of the requital solution providers offer their services both for physical and digital products. But it ’ s not rare for entirely one type of product to be available in function of a sealed system. so, before subscribing to a supplier, make certain it permits your type of a product .

The horde of gateway providers is submerge, so we ’ ve picked some of the biggest, most reliable options .
payment gateway providers compared
table of payment gateway providers features


Stripe is an eCommerce tailored-payment solution. Stripe accepts all major payment methods, including mobile payment providers such as Apple Pay, WeChat Pay, Alipay, and Android Pay .
The service is fully loaded with its comprehensive documentation, external support, and monitor system. It has a simplified PCI submission routine, with 135 patronize currencies, and allows for integrating with early third-party platforms .
price : Stripe charges no frame-up fees. The standard software charges 2.9 percentage + $ 0.30 per transaction. additionally, there is a tip for international card work ( 1 percentage ). But Stripe besides offers a custom-make solution and price box for large businesses. The chargeback come is a specify $ 15 .


PayPal is one of the most widely accepted electronic requital methods in the global. PayPal offers scalable solutions for businesses of unlike sizes. Through its gateway, PayPal offers process of all the major credit and debit cards, and PayPal payments themselves, with diverse other methods. It besides has multiple services, which include PayPal Payments Pro, PayPal Express Checkout, and Braintree .
PayPal is frequently integrated as a host payment solution. PayPal Payments Pro is an upgrade you may obtain if you want an integrated check right on your web site. PayPal Express Checkout is the easiest choice, as it plainly adds a PayPal push button to your web site. Braintree is a separate payment solution, but it is a PayPal division. The independent advantage of using Braintree is that it bills international transactions without an extra tip .
price : PayPal ’ s pricing model is complex, and includes different calculations for micropayments, their platform use, and international transactions. domestic transactions are billed at 2.9 percentage + $ 0.30 per transaction. Outside the US transactions are 3.9 percentage + a fee based on the currency used. There is no monthly fee for the criterion PayPal, but Payments Pro charges $ 30 monthly for a subscription. The chargeback measure is $ 20, and for Braintree, with peer price for transactions, it is $ 15. No frame-up fees are included .

Amazon Pay

Amazon Pay is an eCommerce giant with its platform designed for on-line retailers. Amazon Pay is integrated via API, offering a semi-integrated payment solution. It ’ s available across devices, with a focus on mobile use. Amazon servicing besides supports all the major requital methods and credit rating cards .
price : domestic transactions are billed at 2.9 percentage + $ 0.30 per transaction. International is 3.9 percentage. The refund sum is $ 20 + taxes, if applicable. No apparatus or monthly fees . is designed for small- and medium-sized businesses. Their service besides provides all the major payment method acting back, including PayPal payments and Apple Pay. protects users from deceitful transactions via its Advanced Fraud Detection Suite. They besides support integration with mobile applications .
price : 2.9 percentage + $ 0.30 per transaction. There is a $ 25 monthly fee for a gateway and $ 49 for merchant score frame-up. You may sign up for a payment gateway if you already have a merchant explanation .


2Checkout provides customizable options for businesses of different sizes, a well as integrate requital solutions. Its biggest advantage is its scalability with packages for different intersection types. 2Checkout supports all the major payment methods, 87 currencies, and 15 languages localizations .
pricing : 2Checkout includes 3 packages with different fees. There are no frame-up, monthly, or recurring payments. The 2Sell fee is 3.5 percentage + $ 0.35 per transaction. 2Monetize is a software tailored to digital product sellers, and its price is 6.0 percentage + $ 0.60 per transaction .

Custom payment gateway

There are a bunch of payment gateway providers that offer a full moon shopping experience to your customers and assorted consolidation methods. But if you are a large enterprise, you might be matter to in building your own requital solution to break loose of seller restrictions .

How to build a custom gateway?

Creating a custom-made requital gateway requires respective steps :
Payment gateway supplier registration. Register as a payment gateway provider with a credit rating card company ( or several ) through your acquiring bank .

  1. Contracting with banks. Contract banks that will act as payment processors to handle the actual processing for you. Multiple banks can give you different transaction fees for international transfers, or different rates for currency exchange.
  2. API development. Develop an API for your gateway and write robust documentation as required within PCI DSS compliance.
  3. Tokenization solution. Any institution that stores credit card information does it in the form of tokens. This is a security measure when we replace sensitive data with tokens as it reduces the chance of fraud. Tokens contain transaction data and cardholder information, without exposing it to the third parties.
  4. PCI DSS certification. Become PCI DSS compliant by implementing all the necessary security measures and integrating merchant fraud protection mechanisms on your website.
  5. Choose additional payment methods. If you need additional methods like PayPal, Bitcoin, or mobile wallets (e.g. Apple Pay), you’ll need to integrate them separately with their APIs.
  6. Management tools development. Develop a merchant administration web application, or simply an admin panel to allow your staff to control merchant operations.

You may besides use open-source payment gateway solutions. It is possible to use an open-source payment gateway ( like OmniPay, PayU, or Active Merchant ) software that will lower the costs of the mastermind. But it will, again, restrict you in customization options .
Developing an independent custom gateway and payment process infrastructure requires serious expenses that are billed in a roll from $ 150,000 to $ 800,000. That price includes engineer, care, PCI DSS submission certification, SSL certificate, writing API documentation, and presidency expenses. Besides the fiscal issues, it besides requires the time to launch a amply working organization and implement it into your product .
however, a custom requital solution can bring a number of benefits :
Lower transaction fees. Establishing your gateway, you avoid a gateway supplier as a free-forming gene, which lowers transaction fees .
Customization. A large enterprise clientele may be hard restricted by what vendors offer. even if you find a seller with moo transaction fees and a great count of requital methods, there are always restrictions. Developing a custom payment solution allows you to implement any feature you want, whether those are recurring payments or multi-currency transactions .
Offer payment gateway as a product. With your own custom payment solution, you will be able to offer it to other merchants and agents.

Being a long-time investment, developing a custom requital gateway is quite reasonable for a company with a large annual tax income. For companies handling fewer than 20 thousand transactions per year, a customer requital solution is unnecessary. But for merchants conducting over 1-2 million transactions, the savings promptly mount up .
Optimizing your gateway and saving costs on transaction fees are reasonable factors to consider. Pitfalls you should be mindful of are security issues, which are normally carried by the gateway providers. But, obtaining PCI complaisance, and using imposter management will help you to get customer confidence .


thus, whether you are choosing a payment gateway/processor supplier, or planning to build your own payment portal, it is constantly a much more profitable solution for an on-line merchant, unless you are a non-profit web site. Websites using an built-in payment arrangement are more hope by customers. And if you are looking for a way to improve client confidence, integrate a payment solution that will inspire trust, support multiple payment methods, and be protected from deceitful actions .

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Category : Finance

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