How Interchange-Plus Pricing Actually Saves Your Business Money

Every time a customer taps, dips, or swipes a card at your register, a small slice of that transaction disappears — and if you're on the wrong pricing plan, that slice is far larger than it needs to be. Interchange-plus pricing, often written as interchange++ or cost-plus, is a payment processing model that gives merchants direct visibility into the actual cost of each transaction and typically delivers meaningful savings over flat-rate alternatives. Understanding how it works is one of the most practical steps any business owner can take to protect margins.

What Is Interchange-Plus Pricing?

Interchange-plus pricing, also known as "cost-plus," is a pricing model for payment processing¹ that separates the base cost of a transaction from the processor's markup. Unlike bundled flat-rate plans that charge a single percentage per transaction regardless of card type, interchange-plus reveals exactly what the card networks and issuing banks are charging — and adds a transparent, fixed markup on top. The fees exist to compensate card-issuing banks for their services, as well as the risk they take on by backing your electronic payments².

Each card brand sets its own per-transaction fee, which is a percentage of the total transaction amount³. When a customer pays your business with a Visa rewards card, a portion of that transaction — the interchange fee — goes directly to the bank that issued that card, not to your payment processor⁴. This means interchange is largely outside your processor's control, but the markup you pay on top of it is not.

Why Interchange Fees Dominate Your Processing Bill

The numbers behind card processing costs are striking. In 2025, U.S. merchants paid an estimated $185 billion in total card processing fees, a record high⁵. Of that amount, roughly $130 billion to $145 billion was attributed directly to interchange fees alone⁶. Interchange now represents the largest portion of merchant processing costs, typically accounting for 75 to 85 percent of total processing expenses⁷ depending on industry and risk profile. In practical terms, interchange fees typically make up 70–80% of total processing cost⁸, meaning your processor's markup is only a fraction of what you actually pay.

In the U.S., the average credit card interchange fee is close to 2% of the transaction value⁹, though individual card rates vary widely. A standard debit card may carry an interchange fee of 0.80% + $0.15, while a premium rewards credit card might be closer to 2.10% + $0.10¹⁰. The difference between accepting a regulated debit card and a premium rewards card on the same $100 transaction can exceed $2.00 in interchange alone¹¹. That gap compounds quickly across thousands of monthly transactions.

How Interchange-Plus Breaks Down a Real Transaction

To see interchange-plus in action, consider a cardholder transaction of $100 with a 1.5% interchange fee. Under a typical interchange-plus structure, the processor might charge 1.5% + $0.10 for the interchange and network layers, then add its own 0.3% + 10¢ markup. The merchant receives $97.66 and the total cost to the merchant is $2.34¹². This itemized view means you always know what portion of each fee goes to the card network, what goes to the issuing bank, and what goes to your processor.

The Real Savings: Interchange-Plus vs. Flat Rate

This is where interchange-plus pricing proves its value. On a $10,000 transaction, a 2.9% flat rate plan costs $290 in processing fees¹³. The same transaction processed at an interchange-plus rate of 1.8% + 0.2% markup will only cost you $200¹⁴. That is a $90 difference on a single transaction.

The contrast is even clearer at scale. With flat rate pricing at 2.75%, a business processing $20,000 per month would pay $550 monthly¹⁵. Under interchange-plus with a 2.0% base plus 500 transactions at $0.10 each, the same volume costs $450 per month¹⁶. That is a savings of $100 per month, or $1,200 per year¹⁷ — and that assumes no optimization whatsoever.

The structural reason interchange-plus wins is straightforward: flat rate pricing must cover the most expensive card types — premium rewards cards with interchange of 2.1% or higher¹⁸ — so it builds in a margin for risk. Since interchange varies by card type, businesses that accept a mix of debit, standard credit, and rewards cards almost always pay less with a model that charges each transaction its actual cost.

Who Benefits Most from Interchange-Plus

For most businesses processing more than $10,000–$15,000 per month, interchange-plus produces a meaningfully lower effective rate¹⁹. The larger your monthly volume, the more you benefit, because even small percentage differences on large transaction totals produce substantial dollar savings. Businesses that optimize their processing can save up to 40% on fees²⁰ through the interchange-plus model, and optimizing interchange rates can yield savings of up to 40% on credit card processing fees²¹ overall.

While the interchange is set, markup fees may be negotiable; higher-volume businesses may be able to secure lower markup rates²². This gives growing businesses a lever to pull: as volume increases, the processor's cut becomes a smaller percentage of the total, and savings accelerate.

Practical Strategies to Maximize Your Savings

Choosing interchange-plus is the foundation, but optimization unlocks additional value. Avoiding downgrades can lead to over 1% savings on your transaction costs²³, because certain card-present and card-not-present configurations trigger higher interchange tiers unnecessarily. With interchange optimization, merchants can cut rates by 20–30 basis points²⁴ simply by ensuring each transaction is routed and coded correctly for its card type and acceptance method.

At scale, these basis point gains translate directly to dollars. Saving 24 basis points on $500 million a year can mean over $1.2 million saved²⁵ annually — a figure that illustrates why payment processing costs deserve the same analytical attention as rent or payroll for high-volume merchants.

Visa publishes its interchange rate tables publicly, as does Mastercard²⁶. Reviewing these schedules — or working with a processor who does this analysis for you — lets you understand exactly which card categories are driving your highest costs and whether adjustments to your checkout flow or payment routing can shift volume toward lower-cost acceptance.

Bottom Line

Interchange-plus pricing saves money by replacing a blunt flat-rate estimate with the actual, itemized cost of each transaction. For businesses processing meaningful volume, the transparency and lower effective rates typically translate to thousands of dollars in annual savings. The model works best when you understand what drives interchange — card type, acceptance method, and transaction routing — and take active steps to optimize each. In a landscape where U.S. businesses paid $185 billion in card processing fees in a single year, the difference between the right pricing model and the wrong one is not trivial. Interchange-plus is not a magic solution, but for most growing businesses, it is the most honest and cost-effective path forward.

Sources

1. “Interchange-plus pricing, also known as "cost-plus," is a pricing model for payment processing.” — https://chargebacks911.com/interchange-plus-pricing/  ·  archive
2. “The fees exist to compensate card-issuing banks for their services, as well as the risk they take on by backing your electronic payments.” — https://chargebacks911.com/interchange-plus-pricing/  ·  archive
3. “Each card brand sets its own per-transaction fee, which is a percentage of the total transaction amount.” — https://chargebacks911.com/interchange-plus-pricing/  ·  archive
4. “When a customer pays your business with a Visa rewards card, a portion of that transaction — the interchange fee — goes directly to the bank that issued that card, not to your payment processor.” — https://brooksidepayments.com/interchange-fees-explained/  ·  archive
5. “In 2025, U.S. merchants paid an estimated $185 billion in total card processing fees, a record high.” — https://corepay.net/articles/interchange-fees-explained-what-they-are-how-they-work-and-how-to-lower-your-costs/  ·  archive
6. “Of that amount, roughly $130 billion to $145 billion was attributed directly to interchange fees alone.” — https://corepay.net/articles/interchange-fees-explained-what-they-are-how-they-work-and-how-to-lower-your-costs/  ·  archive
7. “Interchange now represents the largest portion of merchant processing costs, typically accounting for 75 to 85 percent of total processing expenses depending on industry and risk profile.” — https://corepay.net/articles/interchange-fees-explained-what-they-are-how-they-work-and-how-to-lower-your-costs/  ·  archive
8. “Interchange fees typically make up 70–80% of total processing cost.” — https://brooksidepayments.com/interchange-fees-explained/  ·  archive
9. “In the U.S., the average credit card interchange fee is close to 2% of the transaction value, according to WalletHub.” — https://www.financialprofessionals.org/training-resources/resources/articles/Details/interchange-fees-explained-what-they-are-and-how-they-work  ·  archive
10. “A standard debit card may carry an interchange fee of 0.80% + $0.15, while a premium rewards credit card might be closer to 2.10% + $0.10.” — https://corepay.net/articles/interchange-fees-explained-what-they-are-how-they-work-and-how-to-lower-your-costs/  ·  archive
11. “The difference between accepting a regulated debit card and a premium rewards card on the same $100 transaction can exceed $2.00 in interchange alone.” — https://brooksidepayments.com/interchange-fees-explained/  ·  archive
12. “Cardholder transaction: $100 Interchange fee: 1.8% + $0.10 Card network fee: 0.13% + $0.02 Processor Markup: 0.25% + $0.05 Merchant will receive: $97.66 Total cost to merchant: $2.34” — https://chargebacks911.com/interchange-plus-pricing/  ·  archive
13. “you'll pay $290 in fees to process a $10,000 transaction at a 2.9% flat rate.” — https://chargebacks911.com/interchange-plus-pricing/  ·  archive
14. “that same transaction processed at an interchange-plus rate of 1.8% + 0.2% markup will only cost you $200.” — https://chargebacks911.com/interchange-plus-pricing/  ·  archive
15. “With flat rate pricing at 2.75%, you'd pay: $20,000 x 2.75% = $550/month” — https://www.getvms.com/interchange-plus-vs-flat-rate-which-payment-pricing-model-saves-you-more/  ·  archive
16. “you'd pay: $20,000 x 2.0% = $400, plus about 500 transactions x $0.10 = $50Total = $450/month” — https://www.getvms.com/interchange-plus-vs-flat-rate-which-payment-pricing-model-saves-you-more/  ·  archive
17. “That's a savings of $100/month, or $1,200/year” — https://www.getvms.com/interchange-plus-vs-flat-rate-which-payment-pricing-model-saves-you-more/  ·  archive
18. “A premium travel rewards card can carry interchange of 2.1% or higher.” — https://brooksidepayments.com/interchange-fees-explained/  ·  archive
19. “For most businesses processing more than $10,000–$15,000 per month, interchange-plus produces a meaningfully lower effective rate.” — https://brooksidepayments.com/interchange-fees-explained/  ·  archive
20. “Businesses that optimize their processing can save up to 40% on fees” — https://www.depositfix.com/blog/interchange-optimization  ·  archive
21. “Optimizing interchange rates can yield savings of up to 40% on credit card processing fees” — https://www.depositfix.com/blog/interchange-optimization  ·  archive
22. “While the interchange is set, markup fees may be negotiable; higher-volume businesses may be able to secure lower markup rates.” — https://chargebacks911.com/interchange-plus-pricing/  ·  archive
23. “Avoiding downgrades can lead to over 1% savings on your transaction costs” — https://www.depositfix.com/blog/interchange-optimization  ·  archive
24. “With interchange optimization, merchants can cut rates by 20-30 basis points” — https://www.depositfix.com/blog/interchange-optimization  ·  archive
25. “saving 24 basis points on $500 million a year can mean over $1.2 million saved” — https://www.depositfix.com/blog/interchange-optimization  ·  archive
26. “Visa publishes its interchange rate tables publicly, as does Mastercard.” — https://brooksidepayments.com/interchange-fees-explained/  ·  archive