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Credit card processing fees explained

Every card you accept costs you something. Here's the full fee stack, what the pricing models really mean, and how much a card sale actually takes out of your drawer.

Credit card processing fees are the combined cost of accepting a card payment, made up of interchange paid to the customer's bank, assessments paid to the card network, and your processor's markup. For a typical in-person retailer, all of it together lands at an effective rate of roughly 2.5% to 3.5% of card sales. The number moves with your card mix, your ticket size, and — most of all — which pricing model your provider put you on.

Most shop owners never see the stack broken out. They see one deduction on a statement and a rate that never quite matches what they were quoted. Let's take it apart.

The full fee stack

There are more line items than most owners realize. Here's what's actually inside a card sale.

The first two — interchange and assessments — are non-negotiable network costs that are the same for every merchant. We break those down in what is interchange. The markup, the per-transaction fee, and the monthly extras are where providers differ, and where a lot of shops quietly overpay through fees they were never really shown.

Three pricing models — and why they're not equal

How you're charged matters as much as what you're charged. Three models dominate.

Interchange-plus

The processor passes interchange and assessments straight through at cost, then adds a clearly stated markup — for example, cost plus 0.30% and $0.10 per sale. It's the most transparent model because you can see exactly what the networks charged and exactly what your provider added. If you can get it, it's usually the fairest.

Flat rate

One simple percentage on every sale, often with a fixed per-transaction amount — the model most popular apps default to, commonly around 2.6% + $0.10 for in-person sales as published (rates vary and change). It's easy to predict and easy to understand. The tradeoff is that when a customer pays with a cheap debit card, you still pay the flat rate, so the provider keeps the difference.

Tiered

The provider sorts every card into "qualified," "mid-qualified," and "non-qualified" buckets and charges a different rate for each. It looks cheap because the advertised rate is the qualified tier — but the provider decides which sales fall into the expensive tiers, and rewards cards and keyed sales tend to land there. It's the least transparent model. If your statement uses these words, ask to move off it.

What "3.5% + $0.20" all-in really looks like

Batchly keeps it to one all-in number: 3.5% + $0.20 per card sale, no tiers, no surprise monthly line items. Here's what that costs on real tickets.

Now scale it to a month. Take a shop doing $40,000 in card sales at an average $30 ticket — about 1,333 transactions. The percentage piece is $1,400. The per-transaction piece is roughly $267. Total processing cost for the month: about $1,667, an effective rate near 4.2% at that small ticket size. Fewer, larger tickets pull that effective rate down; lots of tiny ones push it up. The flat $0.20 matters most when the ticket is small.

How dual pricing changes the equation

Here's the part the fee tables never mention: you don't have to be the one who pays. Dual pricing doesn't lower the fee — it moves who covers it.

Under a compliant cash-discount model, your shelf price already includes the card cost, and customers who pay cash get a lower price. On the register, every sale shows a cash price and a card price side by side, and the customer chooses. Batchly gives you three modes per sale:

• Absorb — the store eats the fee, the old-fashioned way.
• Pass — the customer covers the 3.5% + $0.20, shown as a clear cash-vs-card price.
• Split — you each take half.

Run the month again on pass: that $1,667 in fees moves off your books and onto the customers who choose to pay by card, while cash customers pay less. On split, you carry about $834 instead of the full amount. Same processing cost — very different bottom line, because you decided who covers it instead of defaulting to yourself.

Whether pass or split is right for your shop is a merchandising and compliance call, not just a math one. Cash discounting is permitted in all 50 states, but the details of how you display and structure it matter — read the primer and confirm with your processor and counsel for your state.

Want your own numbers? Drop your monthly volume and average ticket into the card fee calculator and see absorb, pass, and split side by side. Curious how Batchly's flat model stacks up against a flat-rate app? See the comparison with Square.

Frequently asked

What are the average credit card processing fees for a small retailer?

Most small in-person retailers land at an effective rate between 2.5% and 3.5% of card sales once every fee is counted. The exact number depends on your card mix, ticket size, and pricing model, so the best figure is your own effective rate: total fees divided by total card sales.

What's the difference between interchange-plus, flat, and tiered pricing?

Interchange-plus passes the network cost through and adds a stated markup, so you see both. Flat rate charges one simple percentage on everything. Tiered pricing sorts cards into qualified, mid, and non-qualified buckets and is the least transparent, because the provider decides which sale lands in which tier.

What does 3.5% + $0.20 per transaction actually cost me?

On a $30 sale, 3.5% is $1.05 plus $0.20, so $1.25 in fees. On a $100 sale it's $3.70. Across a month of $40,000 in card sales at a $30 average ticket, that's roughly $1,400 plus about $267 in per-transaction fees.

How does dual pricing lower my processing costs?

It doesn't lower the fee itself — it moves who pays it. With a compliant cash-discount model the card cost is built into the shelf price, cash customers pay less, and card customers cover the processing cost, so the fee stops coming out of your margin.

Are credit card processing fees tax deductible?

Processing fees are generally treated as an ordinary business expense, but how they apply to your return depends on your books and your jurisdiction. Confirm the specifics with your accountant.