How to Open a Merchant Account: Step-by-Step Guide

Opening a merchant account is easier with a clear plan. This guide breaks it down step-by-step to help you set up secure, reliable payment processing.

May 06, 2025

How to Open a Merchant Account: Step-by-Step Guide

Opening a merchant account may seem complicated, but by following a structured approach, you can make the process simple.

Whether you're running an online store, a brick-and-mortar shop, or a combination of both, having a merchant account enables secure and reliable transactions.

This guide will walk you through how to open a merchant account a step at a time to help you get started.

What is a Merchant Account?

A merchant account is a specialised business bank account that holds funds from customer transactions before transferring them to a business's primary bank account. Merchant account providers can be banks or other financial institutions.

An acquiring bank acts as the intermediary between customers and your business by ensuring the correct funds are available and the transaction is authorised.

This process occurs whenever a customer wishes to buy something - they will enter their card details on the checkout page or via a point of sale (POS).

Who Needs a Merchant Account?

Any business looking to accept electronic payments, including credit and debit card payments, will need a merchant account.

Here are a few businesses that can benefit from merchant accounts:

  • eCommerce Businesses: Accepting payments from customers who purchase on websites is essential for online retailers.
  • Retail Stores: To accept payments from customers who make purchases in-store at a POS.
  • Restaurants: Merchant accounts will allow restaurants to accept credit and debit cards from customers dining in or ordering. Orders can be in person, online, or via mobile payments through food delivery apps.
  • Service Providers: To accept payments from clients who pay for services using credit or debit cards, e.g. childcare services.
  • Healthcare Providers: Merchant accounts allow healthcare providers, e.g. doctors or dentists, to process payments from patients to pay for medical services using their debit or credit card.
  • Non-Profit Organisations: To accept donations from supporters, both from those who make contributions in person and online.
Step 1: Assess Your Business Needs

Before choosing a payment processor, you should assess the needs of your business. Here are a few things to consider:

Where Will You Accept Payments?

You may be a business that just needs to accept payments online or at a brick-and-mortar store, or you may need an omnichannel payments solution.

In-Person Payments

If you run a physical establishment where customers interact face-to-face with employees, also known as a brick-and-mortar store, then a point of sale (POS) terminal is best suited.

The terminal will allow your business to process payments quickly by syncing the register with your merchant software.

In-person payments through a POS terminal streamlines transactions for a more efficient checkout, improving your customers' payment experience.

Online Payments

If your business conducts commercial activities on an online platform or over the internet, e.g. an online or eCommerce business, then you'll require an online payment gateway.

This method will enable customers to securely purchase your products and services over the web or directly through bank accounts via your merchant account provider.

Mobile Payments

For a business that requires a mobile setup, a mobile payment processing solution is essential.

Modern card readers are wireless and attach to iOS and Android systems to seamlessly process payments remotely.

You could also consider accepting digital wallet payments like Google Pay, PayPal, or Apple Pay.

Over-the-Phone Payments

If your business operates over the phone, then you could benefit from a virtual payment terminal.

This method allows you to enter the customer's card details manually into your system, turning your computer into a payment card terminal.

 

What Payment Methods Do You Need?

It's important to meet your customers' payment expectations and preferences by accepting payment methods they know and trust, including electronic payments, online transactions and credit card payments.

Here are a few payment methods to consider:

  • Mastercard is a leading payment network and a preferred payment method among merchants and consumers worldwide.
  • Visa is recognised and trusted by banks and consumers globally, facilitating online transactions.
  • Klarna is a global payments provider which offers Buy Now, Pay Later and other financing options, enabling a more convenient checkout for your customers.
  • Apple Pay ensures simple and secure payments via a digital wallet, supporting both international and local payments.
  • PayPal is a widely used digital wallet, offering businesses and consumers a secure way to send and receive payments.
  • Google Pay allows users to connect payment cards to their Google accounts, used by millions of consumers worldwide.

 

Using a payment provider that offers financial services approved methods is beneficial for gaining merchant and consumer trust and preparing your business for success.

 

Expected Transaction Volume

Some merchant account providers are better equipped at processing high transaction volumes.

eCommerce platforms and subscription services are likely to experience significant transaction volumes.

High volume merchants provide the essential infrastructure to handle large transaction volumes securely. With high-volume merchant processing, businesses can handle the influx of customer payments.

 

Security & Compliance Needs

Merchant account providers offer the infrastructure to keep up with evolving regulatory requirements, adapting to emerging threats and ensuring your business remains secure and compliant.

Step 2: Research Merchant Account Providers

Choosing the right merchant account provider is important because it will affect your business's operational efficiency and customer satisfaction.

Listed below are some basic considerations to make before choosing:

 

Transaction Fees

Look for providers that outline their fee structures, and compare pricing models across different providers to find one that aligns with your needs.

Transaction fees, also known as flat-rate pricing, work well for businesses with low credit card transaction volumes and are the most common merchant account cost.

These fees may vary slightly based on the merchant services provider. Typically, merchant providers charge 0.5% to 5% of the transaction's value.

Many small businesses only accept purchases over a certain value (e.g. £3) because slender profit margins prevent them from the transaction fees associated with small transactions.

 

Monthly & Setup Costs

A monthly pricing model is better suited for businesses with high transaction volumes. This pricing model takes a flat fee structure, including the initial set-up and a recurring monthly maintenance fee.

The setup fee is often calculated individually for each project and will depend on your business's requirements and the scope of technical work involved from the payment processor.

Monthly fees may vary based on the merchant bank and payment types; some transactions may be cheaper than under a flat-rate pricing model.


Integration Options

Whilst researching merchant service providers, consider the ease of integration with your existing systems, such as your website or POS.

The more seamless the integration, the sooner you can start accepting payments.

 

Customer Support

It's important to choose a merchant account provider with an extensive customer support system for resolving any issues or questions that arise about the service.

Look for multiple points of contact, e.g. a customer support email address and phone number.

 

Security Features

Security is paramount when managing a merchant account, as with remaining compliant with the Payment Card Industry Data Security Standards (PCI DSS).

PCI compliance involves implementing specific security measures designed to safeguard sensitive cardholder information. Merchant service providers offer a number of tools to remain compliant.

Reputable merchant account providers will ensure that transactions are processed securely by implementing numerous security measures.

These may include fraud detection software, tokenisation, and encryption features to protect your business and customers from potential cyber threats.

 

Step 3: Gather Required Documentation

Once you've chosen a reliable merchant account provider that meets your business's needs, you can proceed with the application process by gathering the required documentation.

Listed below are the most common documents required by merchant account providers:

  • General Information & Business Documentation: Includes your employer identification number (EIN), credit history, business contact information and business license.
  • Financial Statements: Including the business bank account information, cash flow and income statements, tax returns, estimated monthly processing volume, bank statements and any records of credit card payments.
  • Personal Information: Some information about the business owner may also be required, including your name, home address and social security number.
  • Additional Supporting Documents: Other documents may be required, such as business forecasts, marketing material and any voided checks.

 

If you have submitted any incorrect or incomplete information, then the approval process will likely be delayed, or your application may even be rejected. Take time to ensure everything is correct.

Step 4: Submit Your Application

The next step to setting up a merchant account is to submit the required documents.

Once you have collected the documents, you can begin the process of filling out the merchant account application form. Take some time to ensure the documents and details gathered are correct before submitting your application.

You should receive an update within a few working days, depending on the efficiency of your chosen merchant services provider.

 

Underwriting Process

Underwriting is the essential process of evaluating the risk of offering a merchant account to your business.

The provider will review and analyse the information you submitted and ensure the details are all accurate. If your business is established and has a good credit standing for the last few months, then the process should be simple.

High-risk businesses may take longer, and providers may take further time to accurately analyse the associated risk.

In some instances, the merchant service provider may require some additional information.

Step 5: Set Up Payment Processing

Following the approval process, you will need to set up your payment processing equipment.

The exact equipment will vary depending on the payment methods and services you have chosen to accept.

Step 6: Set Up Software

Then, you must set up the payment processing software.

Most merchant account providers will provide onboarding support to ensure the process is simple, providing step-by-step setup instructions. There may be additional fees to cover the costs.

Step 7: Ensure Compliance and Security

Once the merchant account software and hardware are set up, you can begin to test that the system is working correctly and your business is fully compliant with the required security measures.

By optimising your security and compliance, you can better protect your customers' sensitive payment information.

Step 8: Monitor Transactions and Optimise Performance

Finally, you will need to monitor transactions and optimise the performance of your merchant account to ensure the process is hassle-free for customers, increasing customer satisfaction.

FAQs

Why Use a Merchant Account?

Merchant account providers can benefit your business in a number of ways, from improving financial management to improving the efficiency of payment processing.

As well as that, merchant accounts deliver a more seamless customer experience, increasing sales.

 

How Long Does it Take to Open a Merchant Account?

It can take some time to prepare the required documents and then wait for the approval process, anywhere from a few days to a few weeks.

 

How Long Do Merchant Accounts Take to be Approved?

The underwriting process can take a few minutes or several working days, depending on your chosen merchant provider.

The higher risk your business poses to a merchant service provider, the longer the underwriting process will take.
 

Master Your Payments with DECTA

For businesses looking to accept secure and reliable transactions, DECTA provides payment processing services to equip merchants, fintechs, and banks for the world of cashless payments.

Find out more about how to open a merchant account to benefit your business