Skip to main content

Everything You Need to Know About Merchant ID Numbers (MID)

01 October 2024

Please provide your full name
Please provide a valid email address
Please provide a valid contact number
Invalid Input

Written by Libby James
Libby James is co-founder, director and an expert in all things merchant services. Libby is the go-to specialist for business with more complex requirements or businesses that are struggling to find a provider that will accept them. Libby is regularly cited in trade, national and international media.
In this article

    Please provide your full name
    Please provide a valid email address
    Please provide a valid contact number
    Invalid Input

    Share this article with others:

    Are you looking to accept credit and debit card payments for your business? If so, you’ve likely come across the term "Merchant ID Number" (or MID) during your research. You might be wondering what it is, why it’s important, and how to get one. No need to worry! We’ve put together a comprehensive guide that will take you through everything you need to know about Merchant IDs, step-by-step.

    What is a Merchant ID Number?

    Imagine your business as a home, and each financial transaction as a piece of mail. Your Merchant ID Number acts as your home’s unique address in the payment processing world, ensuring that each ‘piece of mail’ (payment) ends up in the right place—your business account.

    A Merchant ID, or MID, is a 15-digit code assigned to your business by your payment processor or bank when you set up a merchant account. It helps banks, credit card networks, and other parties involved in processing payments identify where the funds should go. This identification ensures smooth, secure transactions every time a customer swipes, taps, or clicks ‘buy’.

    One key thing to keep in mind is that your MID should be kept private, much like your bank account details. If it falls into the wrong hands, your business could be vulnerable to fraudulent activities, which could hurt your finances and your reputation.

    How Do Merchant ID Numbers Work?

    Your MID is a critical piece of the puzzle in the payment processing ecosystem. When a customer makes a purchase, their payment information, along with your MID, is transmitted to your payment processor and the customer’s bank. This ensures that there’s no confusion about where the funds should go.

    Every transaction, whether in-store or online, relies on this unique identifier to complete the payment cycle, confirming your business as the rightful recipient of the funds. Think of it as the heartbeat of your payment system!

    Why Do Businesses Need a Merchant ID?

    A merchant ID is indispensable for businesses that wish to accept card payments. Without one, the payment processors wouldn’t know where to direct your customer’s payments, and you’d miss out on the convenience of card transactions.

    However, not every business will receive a direct MID. Full-service payment processing providers like Stripe or Square offer a shared or aggregated MID. This means they use one large merchant account for all their clients, which simplifies the process for small businesses. While you won’t have an individual MID in this case, you’ll still be able to accept payments seamlessly.

    How to Get a Merchant ID Number for Your Business

    Wondering how to get started with your very own Merchant ID? The process is relatively straightforward. Here’s what you need to do:

    1. Open a Merchant Account: Contact a bank, financial institution, or a dedicated payment processor to set up a merchant account.
    2. Submit Your Application: Provide the necessary documentation. Each provider may have slightly different requirements, but here’s what you’ll generally need:
      • Proof that your business is registered
      • Financial statements
      • Owner information
      • Licences and permits (if applicable)
      • Tax information
      • A brief business description or business plan
    3. Approval Process: Once your application is reviewed and approved, the merchant account is created, and your MID is generated and shared with you.

    It’s important to note that MIDs aren’t granted for life. They can be revoked if your business experiences issues such as a high rate of chargebacks or fraudulent activity, so it’s essential to keep a close eye on your transactions.

    How to Find Your Existing Merchant ID Number

    If you already have a merchant account but can’t recall your MID, there are a few ways to find it:

    • Check your merchant account statement.
    • Inspect your bank account for references.
    • Look at your payment processing hardware.
    • Contact your merchant account provider directly.

    Remember, your MID isn’t something that can be easily found online or through a simple Google search. It’s kept private to safeguard your business’s financial security.

    Can You Have More Than One Merchant ID Number?

    Absolutely! Businesses with multiple revenue streams or locations often benefit from having more than one MID. For instance, if you have both a physical store and an online shop, separate MIDs can help you track transactions more effectively and manage your finances with greater precision.

    This setup is also ideal for businesses like arcades that offer separate services, such as food and beverage sales. Each area of the business can have its own MID, making it easier to assess performance and streamline financial operations.

    Can You Use One Merchant ID for Multiple Businesses?

    Unfortunately, no. A single MID cannot be shared across different businesses, even if they’re owned by the same person. This would create a confusing mess of transactions and make it difficult to track payments and resolve disputes.

    Each business should have its own unique merchant account and MID to ensure everything runs smoothly. This way, you can clearly separate payments, avoid confusion, and minimise the risk of errors or financial discrepancies.

    High-Risk MIDs: What You Need to Know

    If your business falls into a category considered "high risk," obtaining a Merchant ID (MID) can be a bit more challenging. Industries such as online gambling, travel services, or adult entertainment often face higher scrutiny due to increased risks of chargebacks and fraud. As a result, high-risk businesses typically require specialised high-risk MIDs that are issued by payment processors experienced in dealing with these types of accounts. High-risk MIDs often come with higher processing fees and stricter contract terms, but they enable businesses in challenging sectors to accept card payments securely and efficiently. To find a suitable provider, it’s crucial to use a specialised Payments Directory® that allows you to filter by high-risk categories, ensuring you partner with a payment processor that understands your industry’s unique requirements and can support your business in minimising potential risks and maintaining compliance.

    Using The Payments Directory® to Find the Right Provider

    The world of payment processing can be overwhelming, but there’s a solution to help streamline the process: The Payments Directory®. Our handy tool is designed to simplify the process. Helping you find the right providers by using your Merchant Category Code (MCC) as a key filter. Whether your business falls under a specific industry, operates across multiple regions, or requires specialised integrations, The Payments Directory® allows you to search for providers based on your MCC, business type, location, and preferred payment methods. This ensures you find a merchant account that fits seamlessly, reducing the risk of approval issues or compatibility challenges meaning you get your MID quickly. With The Payments Directory®, you can easily identify the best providers to help your business accept payments effortlessly and securely right from the start.

    FAQs

    What exactly is a Merchant ID (MID)?
    A Merchant ID is a unique 15-digit number that identifies your business in the payment processing system, ensuring card payments are correctly directed to your account.
    How do I find my Merchant ID number?
    You can find it on your merchant account statement, payment terminal, or by contacting your merchant account provider.
    Do I need a Merchant ID to accept payments?
    Yes, an MID is essential for accepting card payments unless you use an all-in-one payment processor like Stripe or Square, which provides an aggregated merchant account.
    Can I have multiple Merchant IDs for one business?
    Yes, you can have multiple MIDs for one business, especially if you operate in different locations or have separate revenue streams.
    Can I use one Merchant ID for multiple businesses?
    No, you need a unique MID for each separate business entity.
    How do I get a Merchant ID for my business?
    Open a merchant account with a bank or payment processor, provide the necessary documentation, and once approved, you’ll be assigned an MID.
    What should I do if my MID is revoked?
    Contact your payment processor immediately to understand the reason for the revocation and work on resolving the issue to reinstate your MID.
    Do I need to keep my MID private?
    Yes, always keep your MID confidential to prevent potential fraud or unauthorised transactions.

    Related Articles