Every month, merchants open a payments statement and see a number that makes no sense. Sometimes it’s 3.8%. Sometimes it’s 5.2%. More often than you’d think, it’s even pushing 6% or beyond.
It’s not an accident.
Here’s what’s actually inside a merchant processing statement, the gotchas to hunt for, and why if you’re a software platform that doesn’t own your merchants’ rates, you’re quietly bleeding customers, revenue, and trust.
What’s Actually on a Merchant Statement
Every statement should have these components:
Interchange Fees
Paid to the card-issuing bank. Set by Visa/Mastercard and non-negotiable. Typical card-present transactions run ~1.51% + $0.10. Rewards and corporate cards cost more, often 2.3% to 2.7%. Nothing you can do about this one, so don’t shoot the messenger.
Assessment Fees
Paid to the card networks directly. Small (0.13% to 0.15%) but unavoidable. Think of it as the cost of being allowed to sit at the table.
Processing Markup
This is where processors make their money, and where the wide variation between merchants shows up. A fair markup is 0.3% to 0.5% over interchange. A predatory one is 2 to 4x that. But hey, those processor holiday parties don’t pay for themselves.
Per-Transaction Fees
A flat fee per transaction ($0.05 to $0.40). At volume, these add up fast. Every swipe, tap, and click. You’re welcome, processor.
Monthly Fees
Statement fees, PCI fees, gateway fees, monthly minimums. Easily $30 to $100+ before processing a single dollar. Just for the privilege of receiving a statement you probably won’t read.
Junk Fees
More on these below.
The Gotchas to Watch For
Tiered Pricing vs. Flat Rate vs. Interchange-Plus.
Many processors bundle transactions into “Qualified,” “Mid-Qualified,” and “Non-Qualified” tiers, obscuring true costs in ways that almost always favor the processor. Flat rate pricing, popularized by platforms like Square and Stripe, is simpler at 2.9% to 3.5% on everything, but you’re almost always overpaying at any real volume. Interchange-plus is the most transparent of the three, but processors don’t volunteer to explain the difference. Funny how that works.
Your Effective Rate.
Here’s a truth most merchants don’t want to hear: that “2.5%” rate the sales rep quoted you two years ago? It was real. It was also only part of the story. (wink wink)
Most merchants remember the headline rate from when they signed up, glance at their statement each month, spot something that looks like 2 to 3% somewhere in the sea of processing jargon, and assume that’s what they’re paying. Statement filed. Moving on. Nothing to see here.
The problem is that a merchant statement isn’t exactly light reading. It’s a dense wall of fees, rate codes, and acronyms that seems specifically designed to make you give up and go touch grass. Buried in all of it, often stacked quietly on top of that quoted rate, are assessments, markups, per-transaction fees, PCI charges, and a rotating cast of monthly fees with names that sound almost legitimate. Almost.
The fix is embarrassingly simple:
Effective Rate = Total Fees ÷ Total Volume × 100
That’s it. One line of math. And for a lot of merchants, it’s the first time they find out their “2.5%” is actually 5.5% or worse. Thanks for the transparency, guys. Really appreciate it.
There’s one more wrinkle that makes this even trickier: many processors bill a month behind. Your March statement shows March processing volume but it may include some February fees that didn’t post in time. The result? February looks cheaper than it was, March looks more expensive, and your effective rate is a moving target every single month. It’s not a glitch. It’s just confusing enough that most people don’t notice. Convenient, right?
Do the math. You might be surprised, and not in a good way.
PCI Non-Compliance Fees.
$20 to $50 per month, often charged indefinitely, even after the merchant completed their questionnaire. We’ve seen merchants pay this for years on statements they never read. Nothing says “we value our customers” like charging them for a problem they already solved.
Buried Cancellation Fees.
Three-year contracts with $500+ termination fees hiding in the addendum. The merchant signed it, but didn’t know what they signed. But it’s all in the contract, so totally fair. Right?
A Real-World Example
The below merchant is doing almost $1,000,000 monthly, which is costing them more than $60,000 in fees. That’s 6.41% and almost $400,000 over the course of a year.
If your customers are SMBs, imagine what that extra 3+% could be used for. Capex, new employees, expanding, and more.
Junk Fee Notices: The Silent Killers
Processors can introduce new fees with 30 to 60 days written notice. These notices are typically buried in statement inserts, sent to dormant email addresses, or titled something vague like “Important Information About Your Account.” All totally normal stuff, nothing to worry about.
Real examples we’ve collected:
“Global Charging Fee” — a percentage surcharge on all transactions. You’re welcome.
“Network Integrity Fee” — a per-authorization charge that appeared out of nowhere. Must’ve slipped in.
“Regulatory Compliance Adjustment” — ambiguous by design. What does it mean? Great question.
Merchants never objected. Legally, continuing to process means they accepted. And if you didn’t read it, well, that’s on you. At least that’s how the processor sees it.
Why This Is Your Problem as a Software Platform
Churn you can’t explain.
When a merchant’s effective rate climbs from 2.8% to 4.5% over 18 months, they don’t call to complain about their processor. They just leave your software. You’ll hear “wasn’t a good fit.” The real reason was $800 per month in fees eating their margin. But sure, blame the product.
Adoption hits a ceiling.
Word travels in vertical markets. If your merchants are getting burned, that reputation attaches to your platform, making every new payments conversation harder.
Revenue left on the table.
Every unnecessary fee paid to a processor is a dollar that could have been shared with you or your merchant. Platforms that own their payments economics capture that revenue. Platforms that refer and walk away don’t.
You can’t fix what you can’t see.
Without visibility into your merchants’ statements, you can’t audit it, catch it, or protect your customers from it. Out of sight, out of mind, until it’s too late.
The Bottom Line
A 6% effective rate isn’t just a bad deal. It’s a symptom of a broken relationship between a software platform and its customers. The fees are real. The notices are real. The churn is real.
If you can’t tell me what your average merchant’s effective rate is today, that’s the first problem to solve. We’d love to help. And unlike that sales rep, we’ll tell you exactly what you’re paying. No wink required.
