MCC 8111, 8931, 7392: How Professional Service Codes Set Fees

On this page 7 sections

1. MCC 8111, 8931 and 7392: The Codes Assigned to Legal, Accounting and Consulting Firms
2. How Your MCC Shapes Interchange and Commercial Card Rates
3. Level 2 and 3 Eligibility for B2B Professional Invoices
4. Signs Your Firm Was Coded Under the Wrong Category
5. How to Request an MCC Change From Your Processor
6. Reading MCC Effects on Your Monthly Statement
7. Next Steps for Your Firm

Key takeaways

• Your merchant category code determines which interchange programs your firm can qualify for and how clients' corporate card controls treat your charges.
• B2B firms that bill corporate clients may lower commercial card costs by passing Level 2 and Level 3 data, if their code, gateway and processor support it.
• Signs of a miscode include unexpected client declines, a confusing statement descriptor and payments that keep clearing at "standard" or "non-qualified" rates.
• An MCC change has to match what your firm actually does. Request it with documentation, and never pick a code to chase a lower rate.

Every card transaction your firm runs carries a four-digit merchant category code (MCC) that tells the card networks what kind of business you are. Law firms are usually coded MCC 8111. Accounting practices are typically coded 8931, and card network lists generally place management consulting under 7392. These codes affect which interchange categories your payments can qualify for and whether your Level 2 and Level 3 data counts. They also shape how clients' corporate cards treat your charges. This guide explains which codes apply to professional services firms and how each one affects fees and surcharging. It also shows how to tell whether your firm was miscoded and how to request a correction.

MCC 8111, 8931 and 7392: The Codes Assigned to Legal, Accounting and Consulting Firms

Your acquiring bank or processor assigns your professional services merchant category code during underwriting. The assignment is based on the business description, website and documents in your application. The code then travels with every transaction to the card networks and to the client's issuing bank.

These are the codes most professional services firms encounter:

A Note on 8742 for Consultants

You may see 8742 on an application, in your accounting software or in a search for an "MCC 8742 consulting" code. However, 8742 is a Standard Industrial Classification (SIC) code for management consulting services, not a card network MCC. Government and business databases use SIC codes to classify companies. Card network MCC lists generally place management consulting under 7392.

The difference matters because the card networks use your MCC, not your SIC code, to determine interchange eligibility and corporate card controls. Check the MCC on your merchant account and confirm it describes your primary line of work.

The Legal Services MCC and the Accounting Code in Practice

MCC 8111 covers attorneys and law firms whether they handle litigation, transactional work or estate planning. MCC 8931 covers accounting work, including audits and bookkeeping, though a firm that primarily prepares individual returns may be coded under tax preparation instead. If your accounting practice has shifted toward year-round advisory work, make sure your code reflects the change.

Why Mixed Practices Need Extra Care

Many firms do more than one thing. A CPA firm may prepare returns and also run a bookkeeping subscription. A law firm may also offer title or escrow services. A consulting firm may resell software. Processors generally code you by your primary activity.

A genuinely separate line of business may call for its own merchant account and its own MCC. That decision belongs to your processor's underwriting team, and they need full disclosure of what you sell to make it.

How Your MCC Shapes Interchange and Commercial Card Rates

Interchange is the largest part of what you pay to accept cards. Visa and Mastercard publish interchange tables, and the rate on any transaction depends on several factors:

• Card type: consumer debit, consumer credit, premium rewards credit, business, corporate or purchasing card
• Entry method: card-present (tapped, dipped or swiped) versus keyed or online
• Merchant category: your MCC determines which industry programs you are eligible for
• Data quality: whether the transaction carries the fields a given rate requires

For a full walkthrough of how these rates are built, see our guide to what interchange fees are and how card swipe costs are set.

Some network tables include business-to-business or business-services programs tied to specific MCCs. Whether your code qualifies for any of them depends on the current network tables, and so does the rate. Those tables change periodically. Instead of assuming, ask your processor to show you the interchange categories your transactions actually clear at.

Entry Method Often Matters as Much as Your Code

Most professional services payments are card-not-present. Clients pay an emailed invoice, enter a card in a client portal, or call your office so staff can key it in. These transactions generally carry higher interchange than an in-person tap or dip because the fraud risk is higher.

Our explainer on why online and keyed transactions cost more to process covers the mechanics. A firm that sees clients in person, such as a tax office during filing season, may lower costs by keeping a terminal at the front desk for those visits.

Your Code Doesn't Choose Your Clients' Cards

Your MCC doesn't change what cards clients carry. It does reflect who your clients are, and your client base drives your card mix:

• Consumer-facing practices like family law, estate planning and individual tax prep tend to see personal credit and debit cards. That mix includes premium rewards cards, which typically carry higher interchange.
• B2B practices like corporate law, business accounting and consulting tend to see business, corporate and purchasing cards. These can cost more or less depending on the data you pass, which is why Level 2 and Level 3 matter.

Corporate Card Controls Use Your MCC

Many companies issue employee cards that work only at approved merchant categories. When a client's accounts payable team pays your invoice with a restricted card, the issuer checks your MCC against those rules.

A correctly coded consulting or accounting firm typically fits within the categories companies allow for professional services spending. A firm coded as general retail or an unrelated category may see declines that have nothing to do with available credit. Your MCC also feeds the client's expense reporting, so an accurate code makes their reconciliation easier.

Level 2 and 3 Eligibility for B2B Professional Invoices

When a client pays with a commercial card, the networks may offer lower interchange categories if the transaction includes extra data.

Clients often pay large invoices on corporate or purchasing cards, such as invoices for audits, litigation retainers or consulting milestones. Data levels can make a noticeable difference in cost on those transactions.

What Determines Whether You Qualify

Qualification is not automatic. Several things have to line up:

1. Your MCC. Network programs can include or exclude certain merchant categories, so confirm your code is eligible for the programs you're targeting.
2. The card itself. Level 2 and Level 3 categories apply to commercial cards, not consumer rewards cards.
3. Your gateway and processor. Both must support passing the extra fields. Ask specifically, because "supports Level 3" can mean different things to different providers.
4. Your invoicing workflow. In many states, sales tax doesn't apply to most professional services. Ask your processor how your account handles a zero or exempt tax field.
5. Accurate data. Line items should describe what you actually billed, such as "Q3 advisory services, 12 hours." Dummy or placeholder data creates compliance problems.

You may take most commercial card payments through a virtual terminal or an online invoice. If so, confirm that the tool you use can capture these fields. You can also review MannyPay's payment gateway options, which include Authorize.net and NMI, to see what fits your billing system.

Signs Your Firm Was Coded Under the Wrong Category

Miscodes happen for several reasons. The application may have been vague, the firm's services may have changed after onboarding, or the provider may have defaulted to a catch-all code. Watch for these signs:

• Client declines with no obvious cause, especially on corporate cards and especially when the issuer cites a merchant category restriction
• A statement descriptor or category clients don't recognize, such as a retail or "miscellaneous" label on a law firm's charges
• Commercial card payments that consistently clear at standard or non-qualified rates even though you send Level 2 or Level 3 data
• A catch-all code like 8999 when a specific code fits your practice
• A code that matches a past line of work, such as a bookkeeping firm still coded as a tax preparer after shifting to year-round client accounting
• Fee-program questions your processor can't answer clearly, including questions about surcharging, because the account setup doesn't match how you bill

Accuracy is the goal, not a lower rate. Your MCC must describe what your firm actually does. Choosing a code to qualify for cheaper interchange violates card network rules and can lead to fines, account termination or worse. If the correct code costs more, the fix is better pricing or better data, not a different code.

How to Request an MCC Change From Your Processor

If your code looks wrong, these steps keep the request clean and fast:

1. Find your current code. Check your merchant portal, your monthly statement header or your original application. If you can't find it, ask your processor in writing.
2. Document your primary business. Gather your professional license (bar admission, CPA license or equivalent), business registration, website, a sample engagement letter and a sample invoice.
3. Describe your services precisely. "Business tax preparation and monthly bookkeeping for small companies" gives underwriting more to work with than "financial services."
4. Disclose secondary lines of business. If you also sell software, run seminars or provide a distinct service, say so. Underwriting may recommend a separate merchant account for activities that are genuinely separate.
5. Ask what changes. The correction may trigger a review, a new merchant ID, new terminal or gateway credentials, or updated pricing, so ask which of these apply. Don't assume past transactions will be repriced.
6. Verify after the change. On your next statement, confirm the new code appears and check which interchange categories your commercial card payments clear at.

If your provider can't explain your code or how it affects your pricing, that's a reason to look elsewhere. Our checklist on how to choose a merchant service provider covers the questions worth asking.

Reading MCC Effects on Your Monthly Statement

Your statement shows whether your code and data are working. How much detail you see depends on your pricing model. Interchange-plus statements typically list each interchange category separately, while flat-rate and tiered statements often bundle them. Our comparison of interchange-plus vs. flat-rate pricing explains the difference.

The table below shows what to look for. The line labels are illustrative, and the names vary by processor and card network.

Where Surcharging Fits

Some firms offset card costs with a fee program. MannyPay offers surcharging where permitted, along with dual pricing and cash discount programs.

Your MCC alone doesn't settle whether you can surcharge. That depends on card network rules (including registration and disclosure requirements), state law and your professional obligations. Network rules also restrict which card types can be surcharged, and debit cards are generally excluded. Many state bars have issued guidance on passing card fees to clients, and trust account rules generally limit how processing fees can be handled.

These rules change, so confirm current requirements with your processor and a qualified attorney or professional advisor before you launch a program. This section is general information, not legal advice.

Law firms weighing how card payments interact with trust accounting can start with our guide on which account gets the card payment for flat fees "earned upon receipt". Accounting firms can compare their costs against our breakdown of what CPA firms should pay in credit card processing fees.

Next Steps for Your Firm

Pull your latest statement and find three things:

• Your MCC
• The share of keyed and online transactions
• The interchange categories your commercial card payments clear at

If the code doesn't match your practice, or B2B invoices keep falling into standard categories, you have a concrete issue to raise with your processor.

MannyPay works with professional services firms on online, keyed and in-person acceptance and on compliant cost programs. If you bill corporate clients, ask a specialist whether your gateway and processor setup can pass Level 2 and Level 3 data. To have your current setup reviewed, request a free quote, and a MannyPay specialist will respond within one business day.

ME

About the author

MannyPay Editorial Team

Beyond the Swipe's editorial desk researches the publication's guides and news and cites its sources in every article. Articles reviewed by a named MannyPay editor carry that editor's byline.

This article is for general educational purposes and is not legal, tax or financial advice. Card network rules and state laws change; confirm current requirements for your business.