If you’ve ever looked at your payment processing statement and wondered, “What exactly are these interchange fees?” — you’re not alone.
They make up the largest portion of your processing costs, yet many merchants aren’t quite sure how they work. And unfortunately, some processors take advantage of that confusion to make their quotes look better than they actually are.
Let’s break down what interchange fees are, how they’re calculated, and what you should watch for so you can protect your bottom line.
What Are Interchange Fees?
Interchange Reimbursement Fees (often shortened to interchange or IC) are transaction fees charged by the card brands — Visa, Mastercard, Discover, American Express — and passed through acquiring banks whenever a customer pays with a credit or debit card.
Here’s the basic flow:
- A card transaction happens.
- The card brand charges the acquirer (your payment processor) a fee.
- This fee covers things like fraud protection, settlement networks, and risk.
- Your processor pays it upfront, then passes it to you on your monthly statement.
Sometimes these fees appear as part of a bundled “flat rate” along with the processor’s markup. Other times, you’ll see each interchange category listed individually, plus a separate processor fee.
How Are Interchange Fees Set?
Card brands set interchange rates — a percentage of the transaction plus a small per-item fee. For example:
If the rate is 1.5% + $0.10 and the transaction is $10, your interchange fee is $0.25.
Visa and Mastercard update their fee tables twice a year (April and October). Every card brand has its own set of rates, and they vary depending on:
- Merchant Category Code (MCC) – Your industry determines your code, and higher-risk businesses (like casinos) pay more.
- Card Type – Debit generally costs less than credit, and rewards cards usually cost more because of the perks they offer.
- Transaction Method – In-person (“card-present”) transactions cost less than online or phone (“card-not-present”) ones.
Example:
A low-cost transaction = In-person grocery purchase with a debit card.
A high-cost transaction = Phone order for future travel using a corporate rewards card.
Watch Out for These Red Flags
Since card brands set interchange rates, no processor can offer you “special” lower rates. If they claim they can, that’s a big red flag.
What you can do is adjust your payment acceptance to qualify for a lower-cost category — but the rates themselves are non-negotiable.
Also beware of fee padding:
Some processors sneak extra markup into your interchange fee line items. For example, if the actual fee is 1.50% + $0.10, they might show 1.65% + $0.10 on your statement. That difference is their hidden markup.
Even worse, some processors deliberately miscode your business to a different MCC to lower fees — but this can put you at risk for fines or account closures.
The Payscout Difference
At Payscout, we believe in full transparency. We break down interchange fees clearly, explain exactly what you’re paying for, and never hide markups.
Our team works with merchants, agents, and partners to make sure you fully understand your payment costs — and have the tools to reduce them the right way.
Have questions about interchange fees or want a free statement analysis? Please contact our team at sales@payscout.com for more information — we’re here to help.