Credit Card Processing 101: Where Your Fees Actually Go
Every time a customer taps, swipes, or types in a card, a slice of that sale disappears before the money ever reaches your bank account. For most small businesses it adds up to real money every month — and if you've ever opened your processing statement and felt like it was written in another language, you're not alone.
This guide breaks down, in plain English, what happens when a card is run, who takes a cut and why, and how to spot the fees you shouldn't be paying. No jargon, no sales pitch — just the basics every business owner should know before signing (or renewing) with any processor.
What actually happens when a customer pays
A card payment feels instant, but behind the scenes four parties touch every transaction:
The issuing bank — your customer's bank, which fronts the money and takes on the fraud risk.
The card network — Visa, Mastercard, Discover, or Amex, which routes the transaction between the banks.
The processor — the company (like us) that connects your terminal or website to the networks and deposits your money.
You, the merchant — who ultimately pays the fees for all of the above.
Authorization takes about two seconds. Getting your money should take one business day — if your processor offers next-day funding. If you're waiting three or four days for deposits, that's a processor choice, not a technical requirement.
The three fees inside every transaction
1. Interchange
Goes to your customer's card-issuing bank. It's the biggest piece of the cost, set by the card networks and published publicly. It varies by card type: basic debit cards cost the least, premium rewards and corporate cards cost the most, and swiped or tapped transactions generally cost less than keyed-in ones.
2. Assessments
A comparatively small fee that goes to the card network itself.
3. Processor markup
Goes to your processor, and it's the only part that's negotiable. This is where good and bad deals are made.
Here's the key insight: interchange and assessments cost every processor the same. The entire difference between an honest processor and an expensive one lives in the markup — and in how transparently it's disclosed.
The three pricing models (and why the model matters more than the rate)
1. Flat rate
One advertised rate for everything — the model made popular by the big tech processors. Simple and predictable, which is great when you're small. But as your volume grows you're usually overpaying, because you're charged the same premium rate even when customers use basic debit cards that cost far less to process.
2. Tiered pricing
Transactions get sorted into "qualified," "mid-qualified," and "non-qualified" buckets. The advertised rate applies only to the qualified tier — and the processor decides what qualifies. This is the model most likely to hide padding, and it's why the low teaser rate you signed up for rarely matches what you actually pay.
3. Interchange-plus
You pay the true interchange cost, passed through at cost, plus a fixed, disclosed markup. Every line on your statement traces back to a published rate. It's the most transparent model, and for most established businesses, the cheapest.
Rule of thumb: if you can't look at your statement and point to exactly what your processor's markup is, you're probably on tiered pricing — and probably paying too much.
The junk fees hiding on your statement
Beyond the per-transaction rate, watch for fees that have little to do with processing your payments: monthly "statement" or "regulatory" fees, PCI non-compliance penalties (often charged even when compliance would take five minutes to complete), annual fees, batch fees stacked on every settlement, and — the big one — early termination fees buried in long-term contracts. A processor confident in their service doesn't need a cancellation penalty to keep you.
Five questions to ask any processor (including us)
What is your markup over interchange, in writing?
Is there a contract term or early termination fee?
When will my deposits hit my account — next business day, or longer?
Who do I call when something breaks, and will a real person answer?
Will you walk me through my current statement line by line before I switch?
Any processor worth your business will answer all five without flinching. If you get vague answers, teaser rates, or pressure to sign today — keep shopping.
The bottom line
Card processing isn't free, and it shouldn't be a mystery either. The banks and networks set most of the cost; your processor sets the rest. Know your pricing model, know your markup, and never sign a contract that punishes you for leaving. Do those three things and you'll already be paying less than most businesses on your block.
Wondering what you're really paying?
Send us one recent statement. We'll show you, line by line, where you're overpaying — free, with no obligation. Get your free rate analysis — results in 24 hours, $0 cost, or call (575) 779-5505.
