Merchant ID Number (MID): What It Is and Where to Find It

Most people don’t think about how payments end up in their merchant accounts. Unless there is a problem, they process payments and transfer funds without a second thought.

Your merchant ID number (MID) is a unique number that is linked to your merchant account. It is used by banks and payment processors to make sure funds are routed to your account. 

What is a merchant ID number? And where can you find it? Read on to learn more.

TL;DR

• A merchant ID number is a set of unique digits that are connected to your merchant account.
• Your merchant account provider is responsible for assigning the MID.
• Banks and payment processors use this number to route transactions to your merchant account.
• When a customer pays for their products or services, the transaction is linked to your account number and routed accordingly.
• Chargebacks and fraud are tracked at the MID level, allowing merchant account providers and payment processors to determine the risk level of each account.
• In order to get an MID, you must first set up your merchant account, provide the appropriate documents, and complete the verification process.
• Often, you can find the MID in your onboarding documents or in the merchant account dashboard. It is also normally listed in the upper-right corner of your merchant account statement.
• Using the wrong ID number and making typos are common mistakes that happen with MIDs.
• You should avoid sharing MIDs as much as possible because they could be misused by scammers.
• If you’re struggling to set up your merchant account, PayCompass can help.

What Is a Merchant ID Number? 

So, what is a merchant ID number? Is a merchant ID the same as an account number?

A merchant ID number is a set of numbers that identifies your account. It is assigned when the processor onboards your account. Then, the number is given to you by your merchant account provider or a merchant services provider. 

This number matters because it is used by the customer’s bank and the acquiring bank to make sure your company’s payments are transferred to the appropriate account. It’s like the email address on a message that tells the system where the payment should go.

How Merchant ID Numbers Are Used

What is a merchant ID used for? A merchant identification number is used in several different ways. From routing to reconciliation, it ensures funds are moved, charged, and received in the right accounts.

• Routing and Authorization: Whenever a customer swipes their payment, the processor or acquirer uses the merchant ID to route the transaction to the appropriate account.
• Fees and Pricing Structure: This number is associated with your profile, so it is used to determine your interchange fees, pricing structure, processing plan, and other charges.
• Settlement: Once transactions are approved and settled in batches, they are deposited into the bank account that corresponds to your merchant ID.
• Fraud Monitoring, Chargebacks, and Disputed Transactions: When a dispute or chargeback occurs, it is tracked and assigned to the correct merchant account so that your risk level can be properly assessed. Similarly, fraud monitoring and compliance issues are tracked at a merchant ID level.

How to Get a Merchant ID Number

In order to get a valid merchant number, you first have to set up a merchant account with an acquiring bank or payment processor.

1. Decide on a Merchant Services Provider: Pick a provider that has the fee structure and services you need. If you are considered a high-risk merchant account, you’ll need to work with a high-risk merchant account provider.
2. Provide the Appropriate Documents: To set up the account, you’ll need to provide your tax ID number, business address, owner ID, estimated sales volume, refund policies, and information about the type of products that you sell.
3. Complete the Verification Process: For your account to be set up, you must finish the verification process.
4. Retrieve Your Merchant Identification Number: Finally, you can retrieve the merchant ID from your processor portal or dashboard. If you receive an onboarding email or merchant account statement, you can likely find it in those areas as well.

Where Can You Find Your Merchant ID?

If you’re struggling to find your merchant ID number, try checking in the following locations.

• Merchant Account Statements: You’ll typically find the merchant ID number in the top-right corner of your merchant account statement. It may be on its own or inside of a box with other business details.
• Terminals: To find the MID, check any receipts printed from the terminal. You can also print a batch or settlement receipt to see the number. If you still can’t find it, use the terminal guide to figure out which screen the MID is on for your terminal type.
• Payment Gateway Dashboards: Often, you’ll find your ID number in the account settings or profile section. However, the location can vary significantly from one payment gateway to another.
• Onboarding Emails: When you first start working with a new merchant account provider, you will be sent onboarding emails to help you set up your account and understand the different features. Typically, these emails will contain your merchant ID number so that you can have it for your records.
• Bank Statement: Your business bank statement will often include a merchant ID number. If you look in the description field in your transaction history, you’ll typically see a few letters followed by the merchant ID number.

Why You Need a Merchant ID Number 

Once the merchant ID is issued by the acquiring bank, it is given to the merchant by the payment processor or merchant account provider. You need to have a valid merchant number because it ties your transactions to your account. These numbers are a necessity for several important reasons.

• Reporting Requirements: Back-office statements, batch reports, and other documents are connected to your merchant account.
• Technical Support: If you’re having a problem with your account, the processor will generally request your merchant account number so that they can review your terminal configuration, account history, and settings.
• Risk Management: Chargebacks, disputes, and fraudulent transactions are tied to the merchant identification number. In turn, this allows the merchant account provider to calculate your risk level and determine if there should be restrictions placed on your account.
• Business Funding: When customers submit a payment, your merchant ID number is used to ensure the funds end up in your merchant account.

What Does It Mean to Have a Valid Merchant ID Number? 

A valid merchant number must be assigned to your legal entity. The corresponding account cannot be suspended, terminated, or put on hold. When it is used in a payment gateway or point-of-sale (POS) system, it must pass the validation checks. Additionally, the account must have already finished its onboarding process.

What Are Some Common Mistakes Involving Merchant ID Numbers?

Sometimes, you’ll encounter issues with your merchant ID because of common mistakes. The following are just a few of the mistakes we see the most.

Typos

Typos are incredibly common if the merchant ID has to be typed in by hand. If any numbers are transposed, the customer’s payment may fail to process or get rejected.

Terminal ID Mixups

Sometimes, the terminal ID is used in place of the merchant ID.

Incorrect Merchant ID Type

To make using your merchant ID a bit more complex, there are technically two types of merchant IDs. The processor or acquirer has an ID number that they use for the settlement process. Then, there is a gateway ID for online routing.

Incorrect Receipt Numbers

If you are using the receipt to find your merchant ID, it’s important to double-check which number you are using. Besides the merchant ID, the receipt also contains the terminal ID, store number, transaction number, and the acquirer reference number.

MID Sharing 

While the MID doesn’t include a password or log-in, scammers can still use it to steal from your company. Because of this, it’s a good idea to limit how often and where you share your merchant ID.

Incorrect MIDs From Other Locations

If your company has multiple branches, each one may have a different MID. For large businesses, it’s easy to grab an MID from the wrong branch.

How PayCompass Can Help You Set Up Your Merchant Account

By partnering with PayCompass, you can be sure that your merchant account is set up properly. We streamline the onboarding process and guide you through each step along the way. Our team handles the application filing, document collection, and underwriting. Because we’re in charge of your onboarding experience, we can ensure your merchant identification number is correctly configured and issued.

Once your account is fully set up, we can make sure your MID is added to all of the software, apps, and tools you use for payment processing. From payment terminals to POS systems, we’ll properly configure your MID in every location and channel. Afterward, we can help with any MID configuration issues, verification problems, and high-risk merchant account questions you may have. By getting your MID configured properly, you can make sure you’re paid on time and in the correct account.

Final Thoughts

A merchant ID number is one of the most important tools you have for collecting payments. Without an MID, you can’t have your payments routed to your merchant account. 

To get an MID, you have to submit your account application and appropriate documentation. Once your account is set up, you’ll often see the MID in your onboarding emails or account dashboard. If you are uncertain where your MID is, you can also check your merchant account statements.

If you write your number incorrectly or use the terminal ID by accident, it can impact your company’s ability to receive payments. Most MID issues are relatively straightforward, so understanding common mistakes can help you avoid them.

To learn more about merchant identification numbers and how to set up your account, reach out to our team of merchant account experts today for more information.