What credit-card processing fees actually cost you

If you take cards, you're paying somewhere between 2.5 and 3.5 percent of everything that runs through. On a $6,000 job that's $150 to $210 — gone, before you've paid for materials. It's worth understanding, because parts of it are negotiable and parts aren't, and most people don't know which is which.

The three pieces of every swipe

1. Interchange. This is the biggest chunk, and it goes to the bank that issued your customer's card — not to your processor. It's set by Visa and Mastercard, it's public, and nobody can discount it. A basic debit card might be 0.8 percent. A premium travel-rewards credit card can be 2.3 percent plus a fixed fee. When a customer pays with a fancy points card, that's real money out of your pocket.

2. Card network fees. A small slice — roughly 0.13 to 0.15 percent — that goes to Visa or Mastercard themselves. Also fixed.

3. The processor's markup. This is the only part you actually control. It's whatever your processor (Square, Stripe, your bank's merchant services, whoever) adds on top of the first two. On flat-rate services like Square it's baked into the headline number. On "interchange-plus" pricing it's stated separately, like "interchange + 0.30% + 10¢."

Why "2.9% + 30¢" isn't the whole story

Flat-rate pricing is simple and fine when you're starting out. But you're paying the same 2.9 percent whether the customer used a plain debit card that only cost 0.9 percent in interchange, or a rewards card that cost 2.3. On low-cost cards, you're overpaying; the processor keeps the difference.

Once you're running real volume — say $10,000 a month or more — ask a processor for interchange-plus pricing. You pay the true interchange on each card plus a small fixed markup. Your effective rate usually drops a few tenths of a percent. On $120,000 a year, three tenths of a percent is $360.

The fees that quietly add up

• Keyed-in transactions cost more than dipped or tapped ones — often half a percent more — because they're higher fraud risk. If you're typing card numbers off a piece of paper, you're paying for it.
• Monthly account fees, statement fees, PCI-compliance fees, batch fees. Read the statement. A "$9.95 PCI non-compliance fee" every month is $120 a year for not filling out a form.
• Chargebacks. A disputed charge costs you the sale plus a $15–$25 fee even if you win. Clear invoices, a signed scope of work, and a photo of the finished job are your defense.

What to actually do

1. Pull your last three processing statements and find your effective rate — total fees divided by total card volume. That's your real number.
2. If it's above 3 percent and you're doing steady volume, get one competing quote on interchange-plus.
3. Encourage tap or dip over keyed entry, and over bank transfer / ACH for big invoices where the customer's willing — ACH is often a flat fee of a dollar or two instead of a percentage.
4. Don't surcharge customers to cover the fee unless you've checked your state's rules and your card agreement. It's allowed in Georgia with disclosure, but the rules are fussy and a botched surcharge can get your account shut down.

The fee is a cost of doing business, like fuel. You can't make it zero. You can usually make it smaller than it is.