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Interchange Fee

Interchange is the fee that your bank (the acquirer) pays to the customer's bank (the issuer) every time a card transaction processes. It is set by the card networks (Visa, Mastercard, Amex, Discover) and published in rate tables that update twice a year (April and October).

You can't negotiate interchange. It's the same for every merchant in the same category processing the same card type. What you can negotiate is everything your processor charges on top of it.

Why It Matters​

Interchange is 70-80% of your total processing cost. If you're paying 2.9% per transaction on Stripe's flat-rate pricing, roughly 1.8-2.2% of that is interchange going to the customer's bank. The rest is Stripe's markup, network assessments, and fees.

Understanding interchange tells you:

  • Whether your processor's pricing is fair
  • Why some transactions cost more than others
  • Where you have room to optimize (and where you don't)

How It's Determined​

Every transaction gets assigned an interchange rate based on several factors:

FactorImpact
Card typeDebit cards cost less than credit. Rewards cards cost more than basic cards. Corporate cards cost the most.
Transaction typeCard-present (chip/tap) costs less than card-not-present (online).
MCCYour merchant category code affects which rate table applies. Grocery and gas have lower rates than general retail.
Data qualitySending complete transaction data (Level II/III for B2B) qualifies you for lower rates.
Authentication3D Secure authenticated transactions may qualify for lower interchange.

Example Rates (US, Visa)​

Card TypeInterchange Rate
Regulated debit (Durbin)0.05% + $0.21
Standard debit0.80% + $0.15
Basic consumer credit1.51% + $0.10
Rewards credit1.65% + $0.10
Premium rewards2.10% + $0.10
Corporate/purchasing2.50% + $0.10

The same $100 purchase costs you $0.26 in interchange on a regulated debit card and $2.60 on a corporate card. That's a 10x difference on the same sale.

Three Pricing Models​

How you see interchange on your statement depends on your pricing model:

ModelHow Interchange AppearsBest For
Flat rateHidden inside one rate (e.g., 2.9% + $0.30)Under $10K/month, simplicity
Interchange plusInterchange shown separately + fixed markup (e.g., IC + 0.30% + $0.10)$10K-$500K/month, transparency
TieredBundled into "qualified/mid/non-qualified" bucketsAvoid this model if possible

Flat-rate pricing (Stripe, Square, Shopify Payments) simplifies things but means you overpay on cheap cards (debit) and underpay on expensive ones (rewards, corporate). As your volume grows, interchange-plus pricing saves money because you only pay the actual interchange plus a fixed markup.

Common Mistakes​

  • Trying to negotiate interchange. You can't. It's set by the networks. Negotiate your processor's markup instead.
  • Staying on flat-rate pricing too long. At $20K+/month, switching to interchange-plus typically saves 0.3-0.5% of volume.
  • Ignoring downgrades. Transactions that don't meet data requirements get "downgraded" to a higher interchange rate. Missing CVV, AVS, or settlement timing can cost you.
  • Not checking your effective rate. Total fees divided by total volume. If it's above 3.0% on card-not-present, investigate.

How to Optimize​

You can't change interchange rates, but you can influence which rate your transactions qualify for:

  1. Settle transactions promptly. Capturing within 24 hours avoids downgrades.
  2. Send complete data. AVS, CVV, and order details help qualify for the best rate.
  3. Enable debit routing. Under the Durbin Amendment, you can route PIN debit through cheaper networks.
  4. Accept digital wallets. Apple Pay and Google Pay transactions often qualify for lower rates because they're tokenized.
  5. Switch to interchange-plus. See the actual cost per transaction and stop overpaying on debit.

See Also​

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