Some credit card processors use a quiet tactic known as “enhanced billing.” They quote you a low discount rate to win the account, then inflate the interchange rate underneath it, the fee charged to process each transaction. For a merchant without a deep understanding of the interchange categories, it goes completely undetected.
Most merchants have no idea how many interchange categories exist, let alone the actual rates and how they apply. If you do not know a transaction should have cleared at 1.90%, it is easy for a processor to charge you 2.5% instead, and to make that extra margin look like it came from Visa or Mastercard.
Here is a real scenario I ran into. Visa’s actual interchange rate on the transaction was 0.76%. The processor was charging an extra 0.65% on top of that, and the merchant believed Visa was charging them the full 1.41%.
What the merchant actually paid
That extra 0.65% was pure processor markup, hidden inside a number the merchant assumed came entirely from Visa. It sounds small. It is not. On just $1,000,000 of affected transactions, 0.65% is $6,500 a year walking out the back door, on a single misread category, with the merchant none the wiser.
Processors usually do not mark up the base interchange rate, the rate charged for basic, non-rewards, non-commercial card transactions, because that rate is listed on your merchant agreement and you might notice the bump. Instead, they mark up the transactions that downgrade.
For anyone less familiar with the jargon: a downgrade is when a transaction does not settle at the lowest tier or rate. A sale that could have cleared at 1.90% might downgrade to 2.95% if the right data was not passed at the time of the sale. This usually happens when the merchant has the wrong equipment, the wrong payment gateway, or the wrong setup.
A smart processor may fix some of the downgrades while quietly leaving the majority to keep clearing at the higher rate. The worse a transaction clears, the more profit for the processor, the very people teaching the merchant how to process. If the processor sets you up wrong, your transactions downgrade, which costs you more money and makes them more money at the same time.
Interchange is not one rate. It is 640 categories set by Visa and Mastercard, and every transaction is assigned to one of them. The category depends on the type of card (debit, standard credit, rewards, corporate), how the card was accepted (in person, keyed by hand, or online), and the data passed with it (address verification, and on commercial cards, Level 2 and Level 3 detail like tax amounts and line items).
The best, lowest-cost categories demand the most complete data. Miss a field and the transaction downgrades to a more expensive category. Common causes include the wrong terminal or gateway, a missing address or zip code, no Level 2 or Level 3 data on a commercial card, or batching a sale too late. Because the categories are so complex, most merchants cannot tell a legitimate downgrade from an inflated one, and that gap is exactly where enhanced billing lives.
If this sounds like a theory, it is not. In 2016, a class-action lawsuit was filed against Vantiv Integrated Payments over claims the company charged customers unauthorized and marked-up fees. It was reportedly settled for around $52 million.
Settlements like that rarely come with an admission of wrongdoing. Companies pay, deny, and keep operating the same way, which is why the burden of catching this falls on the merchant, not the regulator. Merchant processing is not regulated, so no agency is checking these statements for you.
You do not need to know a single interchange category to sense that something is off. You just need one number you can calculate yourself: your effective rate.
The two-minute test
Add up every fee on your statement, not just the discount rate, and divide by your total card volume for the month.
effective rate = total fees ÷ total card volume
If your effective rate is north of about 3% and you are not a high-risk business, something is probably wrong and worth a closer look. It is the fastest way to detect inflated interchange without knowing a single category.
Heavy rewards or corporate cards, American Express, small average tickets, or online-only sales can push a legitimate effective rate higher, so treat this as a flag, not a verdict. It tells you whether to dig, and enhanced billing is one of the first things a dig turns up.
Beyond that one number, keep a close eye on your statements in May and November, because Visa and Mastercard adjust interchange every April and October. The adjustments are minimal, usually less than 0.01%, but processors often use them as an excuse to hike their own fees and blame the increase on the networks. Here is how to check the detail.
The “risk fee” trap
A “risk fee” is a real fee, but it is very, very small, often less than one cent. A processor can invent a fee with the same name and charge a very large amount. It is their fee, but it is not the same fee shown on the network’s page. Same name, wildly different number.
If you want a second set of eyes on the names, our How to Read Your Merchant Statement page walks through each line so you can tell a real fee from a made-up one.
The reason this markup is so hard to catch by hand is the sheer volume of categories and transactions. That is what we built our auditing system for. MADR (Mass Analysis Data Reporting) reads every line of your statement and validates each transaction’s interchange category against Visa’s published rate in a nanosecond.
If the category is real, we know the exact rate it should have cleared at, so any markup on top of it shows up immediately. If a processor has hidden the category behind an internal code, MADR flags it as an unknown junk fee, because the networks publish their real categories and processors do not publish made-up ones. Either way, the inflated portion has nowhere to hide.
If you are considering a specialized auditing firm for credit card processing fees, look for one that guarantees its work, does not require a contract, and does not take a percentage of your savings. (Disclosure: my company helps with this, as do others.) A firm paid as a share of savings is quietly incentivized to leave some savings on the table so the number keeps recurring, which is the same misaligned incentive that created the problem in the first place.
By staying vigilant and informed, and by insisting on real breakdowns instead of vague answers, you can protect your business from unnecessary charges and avoid overpaying due to unjustified fee hikes.
Wondering whether your interchange is being inflated? A free audit validates your statement line by line against the real published rates, and shows you exactly what is walking out the back door. No strings, no credit card, nothing to sign.
Get My Free Auditor call 800-672-1292
Read More Check out our other insights here
If Bank of America handles your credit card processing, go and pull your last three statements before you read any further. We have watched accounts at that bank move from four basis points to over forty, and the businesses paying it were told the new
Do you have a “Risk Fee” on your credit card processing statement?
No? Good. You are luckier than a lot of merchants, and you should keep reading anyway.
