Interchange Fees Explained: What Every Small Business Owner Needs to Know in 2026

Q: What's the difference between interchange-plus and flat-rate pricing?

Interchange-plus passes through the actual interchange cost plus a fixed markup. Flat-rate (like Square's 2.6% + $0.10) charges the same regardless of card type. For debit cards (interchange ~0.5%), you'd pay 0.5% + markup on interchange-plus vs. 2.6% flat — a massive difference. Flat-rate is simpler; interchange-plus is cheaper for most businesses over $5,000/month. Full pricing comparison.

Every time a customer swipes, taps, or dips their credit or debit card at your business, a portion of that sale goes to the bank that issued the card. That portion is called the interchange fee, and it is the single largest component of your processing costs.

Yet most business owners have never heard the term. They just see one number on their statement and assume that is what their processor charges. In reality, that number is made up of multiple layers, and understanding those layers is the first step to paying less.

What Exactly Are Interchange Fees?

Interchange fees are transaction fees paid by the merchant's bank (the acquiring bank) to the customer's bank (the issuing bank) every time a card transaction is processed. They were created to compensate issuing banks for the risk of lending money to cardholders and for maintaining the payment infrastructure.

Think of it this way: when your customer pays with a Visa card issued by Chase, Chase is essentially fronting the money. The interchange fee is their cut for taking on the risk that the cardholder might not pay their bill.

These fees are set by the card networks (Visa, Mastercard, Discover, American Express) and are updated twice a year, typically in April and October.

How Much Are Interchange Fees?

Interchange fees vary widely depending on several factors, but here are the general ranges for 2026:

Credit Cards:

Visa: 1.15% to 2.60% + $0.05 to $0.10
Mastercard: 1.15% to 2.65% + $0.05 to $0.10
Discover: 1.35% to 2.50% + $0.05 to $0.10
American Express: 1.43% to 3.30% + $0.10

Debit Cards (Regulated):

All networks: 0.05% + $0.21 (capped by the Durbin Amendment for banks with over $10 billion in assets)

Debit Cards (Unregulated/Small Bank):

Typically 0.70% to 1.15% + $0.15 to $0.25

As you can see, the range is enormous. A debit card transaction from a large bank costs a fraction of what a premium rewards credit card costs. This is why flat-rate pricing is so problematic for merchants processing a lot of debit transactions.

"I didn't realize until I switched to interchange-plus that almost 40% of my transactions were debit cards. I was paying 2.9% on transactions that actually cost 0.26%. The flat rate was killing me." - r/smallbusiness user

What Determines Your Interchange Rate?

Multiple factors affect which interchange rate applies to a specific transaction:

Card Type

Rewards cards, business cards, and premium cards carry higher interchange than basic consumer cards. A Visa Signature Preferred card costs significantly more to accept than a basic Visa debit card. You have no control over which card your customer uses.

Transaction Method

How the card is processed matters:

Card-present (chip/tap): Lowest rates. The physical card is verified, reducing fraud risk.
Card-not-present (online/phone): Higher rates. More fraud risk means higher interchange.
Keyed-in transactions: Highest rates. Manually entering card numbers is the riskiest method.

Merchant Category Code (MCC)

Your business type affects your rate. Grocery stores and gas stations get preferential interchange rates. Restaurants and retail pay standard rates. Some categories like financial services pay higher rates.

Transaction Size

Some interchange categories have a flat per-transaction component. On small transactions (under $10), this fixed fee can represent a disproportionately large percentage of the sale.

The Durbin Amendment: Why Debit Cards Are Cheaper

In 2010, the Dodd-Frank Act included a provision called the Durbin Amendment that capped debit card interchange fees for banks with over $10 billion in assets. The cap was set at $0.21 + 0.05% of the transaction value, plus a $0.01 fraud prevention adjustment.

This is why debit card transactions from major banks cost roughly $0.22 to $0.24 regardless of the transaction amount. Before the Durbin Amendment, debit interchange fees averaged about 1.15%.

In early 2026, the Federal Reserve proposed further reductions to the debit interchange cap, potentially lowering it to $0.14 + 0.04%. If finalized, this would save merchants billions annually. You can track updates on the Federal Reserve's Regulation II page.

"The Durbin Amendment saved my coffee shop hundreds per month. We do a ton of small debit transactions and those used to cost way more before the cap." - r/restaurateur user

Related: Learn more about how the card swipe fee law affects your business.

How Interchange Fees Flow Through Your Statement

Depending on your pricing model, interchange shows up differently:

Interchange-Plus Pricing

The most transparent model. Your statement shows the actual interchange cost for each transaction category, plus a fixed markup from your processor. You can verify interchange charges against published rates.

Example statement line:

Visa CPS Retail Credit: $12,450 at 1.51% + $0.10 = $188.00 (interchange) + $31.13 + $12.45 (processor markup at 0.25% + $0.10) = $231.58

Flat-Rate Pricing

Everything is bundled into one rate (like 2.7%). You never see the actual interchange. The processor keeps the spread between your flat rate and the real interchange cost. On regulated debit cards, that spread can be enormous.

Tiered Pricing

Transactions are bucketed into qualified, mid-qualified, and non-qualified tiers. The processor decides which tier each transaction falls into, and the criteria are often vague. This model makes it nearly impossible to verify you are being charged correctly.

💰 Want to see how much you're overpaying? Use our free savings calculator to find out in 30 seconds. Or get a free statement analysis from our team.

How to Minimize Your Interchange Costs

While you cannot negotiate interchange rates directly, you can take steps to qualify for lower rates:

1. Encourage Chip and Tap Payments

Card-present transactions qualify for the lowest interchange categories. If you are manually keying in transactions when you could be dipping or tapping, you are paying a premium.

2. Settle Batches Daily

Most interchange programs require transactions to be settled within 24 hours to qualify for the best rates. If you batch out only once a week, many transactions will downgrade to higher interchange categories.

3. Include Level II and Level III Data

For B2B transactions, providing additional data (tax amount, customer code, line-item detail) can qualify transactions for significantly lower interchange rates. The savings can be 0.50% or more per transaction.

4. Use Address Verification (AVS) for Card-Not-Present

For online or phone orders, using AVS helps qualify transactions for lower interchange categories. Without AVS, transactions may be routed to higher-cost categories.

5. Avoid Manual Entry When Possible

Keyed-in transactions almost always hit the highest interchange categories. Invest in a proper terminal or card reader to avoid this.

"We were keying in about 30% of our transactions because our old terminal was slow. Got a new tap-enabled terminal and our effective rate dropped by almost half a percent. That was over $200/month saved just from that." - r/smallbusiness user

The Credit Card Competition Act: What Could Change

The Credit Card Competition Act, reintroduced in Congress in 2025, would require banks that issue Visa or Mastercard credit cards to also enable at least one alternative network for routing transactions. The idea is that more routing competition would drive interchange fees down for merchants.

This is essentially extending the Durbin Amendment's debit routing provisions to credit cards. If passed, it could meaningfully reduce credit card interchange fees, though the timeline and final impact remain uncertain.

The Small Business Administration has resources for business owners looking to understand how regulatory changes affect their operations.

Why This Matters for Your Bottom Line

For a business processing $30,000 per month, the difference between a 2.9% flat rate and an interchange-plus arrangement can easily be $200 to $400 per month. Over a year, that is $2,400 to $4,800 going directly to your bottom line.

The key takeaway: interchange fees are fixed costs that every processor pays. The only variable is how much your processor marks them up, and whether your pricing model lets you see what is really happening.

Related reading:

For current interchange rate schedules, visit Visa's merchant resource page and Mastercard's interchange programs.

💰 Want to see how much you're overpaying? Use our free savings calculator to find out in 30 seconds. Or get a free statement analysis from our team.

Ready to stop overpaying? Sleft Payments offers transparent pricing with no contracts and no hidden fees. Get a free quote or call us at (215) 595-6671.

Frequently Asked Questions

What is interchange and why can't I negotiate it?

Interchange is the fee paid to the card-issuing bank (like Chase or Bank of America) every time a card is swiped. These rates are set by Visa and Mastercard and are non-negotiable — every processor pays the same interchange. What you CAN negotiate is your processor's markup on top of interchange. Learn how to negotiate.

Why do rewards cards cost merchants more?

Rewards cards (cashback, travel points, premium cards) have higher interchange rates because the issuing bank uses interchange revenue to fund those rewards. When a customer pays with a Chase Sapphire Reserve, you pay approximately 2.4% in interchange vs. 1.65% for a basic Visa. The customer gets their points; you pay for them.

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

Interchange-plus passes through the actual interchange cost plus a fixed markup. Flat-rate (like Square's 2.6% + $0.10) charges the same regardless of card type. For debit cards (interchange ~0.5%), you'd pay 0.5% + markup on interchange-plus vs. 2.6% flat — a massive difference. Flat-rate is simpler; interchange-plus is cheaper for most businesses over $5,000/month. Full pricing comparison.

Will interchange fees go down with new legislation?

The Credit Card Competition Act aims to create competition that could lower interchange, but passage is uncertain and implementation would take years. The Durbin Amendment successfully capped debit interchange in 2010, but credit card interchange remains unregulated. Don't wait for legislation — optimize your processing now.

How can I lower my interchange costs without switching processors?

Encourage debit card use (lower interchange), ensure your terminal processes chip transactions (lower rates than keyed-in), settle batches daily, and use address verification for card-not-present transactions. These optimizations can reduce your average interchange by 0.2-0.5%. For bigger savings, consider a cash discount program that eliminates processing costs entirely.

Want to know exactly how much you could save? Try the Sleft Payments Savings Calculator for a personalized estimate.