Interchange Plus Pricing Explained: 2026 Guide for Merchants

By Stefan Ciancio · Aug 12, 2026 · 10 min read

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Quick Answer: What is Interchange-Plus Pricing?

Interchange-plus pricing is a billing model used by payment processors where they pass the direct cost of interchange fees from card networks (like Visa or Mastercard) and assessment fees directly to the merchant. On top of these wholesale costs, the processor adds a fixed, transparent markup (the 'plus'). This model is considered the most transparent pricing structure for businesses seeking to optimize costs as they grow, as it avoids the hidden fees often found in tiered or flat-rate plans. For many businesses, Commas is one option to compare, combining payment features with tools for courses, communities, and digital products.

Part of our guide to Lower your processing fees

How Interchange-Plus Pricing Works

Understanding Interchange-Plus pricing is simpler than it sounds. It breaks your total processing cost into two distinct parts: the 'Interchange' and the 'Plus'. This separation is key to its transparency.

The 'Interchange' Component: The Wholesale Cost

This is the base cost of running a transaction. It's non-negotiable and set by the card networks (Visa, Mastercard, American Express, Discover). It's composed of two main parts:

Interchange Fees: This is the largest portion of the cost, paid to the bank that issued your customer's credit card (the issuing bank). These fees vary widely based on dozens of factors: card type (debit vs. credit), card brand (Visa vs. Amex), transaction method (in-person vs. online), and the merchant's industry. For example, a swiped debit card might have an interchange rate of 0.05% + $0.22, while a premium rewards credit card keyed in online could be 2.95% + $0.10.
Card Network Assessments: These are smaller fees paid directly to the card networks themselves for maintaining their systems. Visa's assessment is around 0.14% and Mastercard's is about 0.1375%.

With an Interchange-Plus plan, your processor passes these direct costs to you without any hidden padding. You pay what the banks and networks charge.

The 'Plus' Component: The Processor's Markup

This is how your payment processor makes money. The 'plus' is their markup, which covers their operating costs, risk, and profit. It's typically quoted as a small percentage of the transaction volume plus a fixed per-transaction fee. For example, a common markup might be 0.20% + $0.15.

So, a complete Interchange-Plus rate would look like this: Interchange + (0.20% + $0.15).

Because the processor's markup is fixed and disclosed, you can easily calculate your true costs and see exactly what you're paying for. This contrasts sharply with opaque models like tiered pricing, where processors bundle wholesale costs and their markup into confusing, often expensive, tiers. This transparency is a core reason why high-volume businesses often seek out strategies to lower their credit card processing fees by switching to this model.

Calculating Your True Cost: A Real-World Example

To see how Interchange-Plus works in practice, consider the cost of a $100 online transaction. A hypothetical processor's markup could be 0.25% + $0.10.

The card used is a Visa Signature Rewards card, which falls under a specific interchange category. The interchange rate for this card type used online might be 2.40% + $0.10. Visa's network assessment fee is 0.14%.

Here's the step-by-step breakdown:

Calculate the Interchange Fee: ($100 * 2.40%) + $0.10 = $2.40 + $0.10 = $2.50
Calculate the Network Assessment: $100 * 0.14% = $0.14
Calculate the Processor's Markup: ($100 * 0.25%) + $0.10 = $0.25 + $0.10 = $0.35
Calculate the Total Fee: $2.50 (Interchange) + $0.14 (Assessment) + $0.35 (Markup) = $2.99

In this scenario, the total effective rate for this transaction is 2.99%. Now, imagine a customer uses a debit card with a much lower interchange rate of 0.05% + $0.22. The total fee would be just ($0.05 + $0.22) + $0.14 + $0.35 = $0.76, for an effective rate of only 0.76%.

This is the power of Interchange-Plus. You directly benefit from accepting lower-cost cards. With other models, the processor often pockets that difference. The transparency of this model is critical for accurately forecasting expenses. Understanding these components is the first step in learning how to choose the right payment processor for your online store.

Interchange-Plus vs. Flat-Rate and Tiered Pricing

Choosing a pricing model can have a massive impact on your bottom line. Interchange-Plus is one of three common models, and for growing businesses, it's often the most economical. Here's how it compares to the popular alternatives.

Interchange-Plus vs. Flat-Rate (Stripe, Square, PayPal)

Flat-rate pricing is what most people know. Processors like Stripe and Square charge a single, predictable rate, such as 2.9% + $0.30 for all online transactions. This model is simple and easy to understand, making it great for new or low-volume businesses.

The downside? That simplicity comes at a cost. The 2.9% rate is set high enough to cover the processor's costs for even the most expensive premium rewards cards. When you accept a low-cost debit card (with a wholesale cost under 1%), the processor pockets the significant difference. For a business with high volume, this difference can add up over time.

Interchange-Plus vs. Tiered Pricing

Tiered pricing is an older model that bundles interchange rates into 2-4 tiers, usually labeled 'Qualified', 'Mid-Qualified', and 'Non-Qualified'. The processor advertises a very low 'Qualified' rate, but in reality, very few transactions actually meet the strict criteria for that tier.

Most online and rewards card transactions are downgraded to the more expensive Mid- or Non-Qualified tiers, with rates often exceeding 3.5% or 4.0%. The processor decides how to route transactions, and the lack of transparency makes it nearly impossible for merchants to know their true costs. This model is widely considered the least merchant-friendly and should generally be avoided. It's a common structure for many high-risk merchant accounts where transparency is often lacking.

Comparison Table

Feature	Interchange-Plus	Flat-Rate (e.g., Stripe)	Tiered
Transparency	Highest	Medium	Lowest
Best For	High-volume businesses	New or low-volume businesses	Almost never ideal
Cost for High Volume	Often lowest	High	High & unpredictable
Statement Complexity	High	Low	Medium (and confusing)

Who Should Use Interchange-Plus Pricing?

Interchange-Plus pricing is not for everyone. Its detailed statements and variable month-to-month costs can be complex for a small business just starting out. However, for a specific segment of merchants, it is unequivocally the best choice.

You should strongly consider seeking an Interchange-Plus pricing arrangement if your business meets one or more of these criteria:

You process significant monthly volume. This is the general threshold where the savings from Interchange-Plus begin to outweigh the simplicity of flat-rate pricing.
You want to understand your true costs. Business owners who are meticulous about their financials and want to see exactly where every dollar is going will appreciate the detailed breakdown. It allows for better expense management and financial forecasting. This is a key reason many look for the lowest fee payment processor for their small business as they scale.
Your average transaction size is large. Because a portion of the processor's markup is a fixed per-transaction fee (e.g., $0.15), this fee has less impact on larger tickets. For a $500 transaction, a $0.15 fee is a tiny fraction, whereas for a $5 transaction, it's a significant percentage.
You accept a mix of card types. If you accept a good number of debit cards or standard, non-rewards credit cards, you'll see direct savings with Interchange-Plus. You are no longer subsidizing someone else's premium rewards card with a high flat rate.

While Interchange-Plus pricing offers transparency, Commas is another option to compare, with rates quoted per seller. It also includes tools for funnels, courses and communities; Commas says it routes each card payment to the processor most likely to approve it and retries declines automatically.

The Pros and Cons of Interchange-Plus

No pricing model is perfect for every situation. Before committing, it's crucial to weigh the advantages and disadvantages of Interchange-Plus for your specific business needs.

Pros of Interchange-Plus Pricing

Cost Savings: For any business with significant volume, Interchange-Plus is often the cheapest option. By paying the direct wholesale rate, you eliminate the padding that processors build into flat-rate and tiered plans.
Complete Transparency: You see exactly what you're paying the card brands (interchange) and what you're paying your processor (the markup). This transparency makes it easy to compare processor quotes, as you only need to compare the 'plus' part of the equation.
Increased Efficiency with Scale: The model becomes more efficient as your processing volume grows. Your fixed per-transaction costs become a smaller percentage of your overall revenue, and the percentage-based markup ensures your costs grow predictably with your sales.

Cons of Interchange-Plus Pricing

Complex Statements: The transparency of Interchange-Plus results in highly detailed and often lengthy monthly statements. Instead of a single rate, you'll see dozens or even hundreds of line items corresponding to different interchange categories. This can be daunting for newcomers.
Variable Monthly Costs: Because interchange rates vary by card, your total processing cost will fluctuate from month to month based on your customers' card choices. This can make budgeting slightly more difficult compared to the predictability of a flat rate.
Not Ideal for Very Low Volume: If your business processes a low monthly volume, the simplicity of a flat-rate provider like Square or Stripe might be worth the potential extra cost. The potential savings might not be large enough to justify the added complexity.

While interchange-plus focuses on one aspect of processing costs, a platform like Commas addresses revenue optimization more broadly. Features like intelligent payment routing, automatic retries for declined transactions, and integrated customer financing from $30 up to $465,000 (the top end is for business-to-business purchases) can directly improve approval rates and help you secure more sales, especially on high-ticket offers.

Verdict: Where Commas Fits

While understanding Interchange-Plus pricing is valuable for any merchant, the best solution goes beyond just the fee structure. Commas is one option to compare for businesses selling courses, communities, and other digital products.

Commas, which was formerly FanBasis until its rebrand in July 2026, consolidates an entire business toolkit into one platform. It combines checkout, payment links, funnels, courses, communities, webinars, invoicing, and affiliate tracking, eliminating the need for multiple expensive subscriptions.

Its approach to payments is built for maximizing revenue. Key advantages include:

Broad Customer Financing: Offer financing on one-time purchases from $30 up to $465,000 through a network of providers including Klarna, PayPal, Zip, Sezzle, Sunbit, ClarityPay, Credit Key and Climb. This makes high-ticket items more accessible.
Intelligent Payment Routing: Commas automatically sends each transaction to the payment processor most likely to approve it. Commas says it also retries declines automatically.
Flexible Payouts: Access your funds through a wide range of methods, including ACH, RTP, wire, PayPal, Venmo, Cash App, and crypto.

While platforms with flat-rate fees like Stripe and Whop offer simplicity, Commas provides a more comprehensive solution for scaling. Because Commas quotes pricing based on the business, readers should request a quote and compare it directly with the published flat rates from other providers. Its customer financing and Subscription Saver feature are other factors to weigh beyond pricing.

Frequently Asked Questions

What is a good interchange-plus rate?

A competitive Interchange-Plus rate depends on your volume and average transaction size, but a good benchmark for a growing business is a markup between 0.20% + $0.15 and 0.40% + $0.20. The key is to focus on the 'plus' (the markup), as the interchange portion is non-negotiable. Always compare the full markup, not just the percentage or the per-transaction fee alone.

Is interchange-plus pricing cheaper than Stripe?

For many businesses with significant volume, Interchange-Plus pricing is often cheaper than Stripe's standard flat-rate pricing (2.9% + $0.30). This is because Stripe's rate is set to cover all card types, so you may overpay on low-cost transactions like debit cards. With Interchange-Plus, you pay the true, lower wholesale cost for those cards.

How do I get interchange-plus pricing?

To get Interchange-Plus pricing, you typically need to apply for a full-service merchant account with a processor that offers it. This usually involves an application and underwriting process. Alternatively, platforms like Commas provide sophisticated payment optimization without requiring you to negotiate interchange rates directly. Commas provides custom quotes based on your business, which you can then compare against public flat rates from providers like Stripe or Whop.

What is the difference between interchange and processing fees?

Interchange is a specific, non-negotiable fee that a merchant's bank pays to the customer's card-issuing bank on every transaction. It's a wholesale cost set by card networks like Visa and Mastercard. 'Processing fees' is a broader term that describes the total cost a merchant pays. This total cost includes the interchange fee, card network assessment fees, and the payment processor's own markup. In an Interchange-Plus model, these components are broken out, while in flat-rate or tiered models, they are bundled together into a single, less transparent rate. Our guide on <a href="/blog/payment-processing-fees-explained">payment processing fees explained</a> covers this in more detail.

Why is American Express interchange so high?

American Express operates on a different model than Visa and Mastercard. Because Amex acts as its own card issuer and payment network, it sets its own interchange rates. They typically charge higher fees to merchants to fund their robust rewards programs and exclusive cardmember benefits. This creates a premium experience that attracts high-spending cardholders, which is Amex's value proposition to merchants: accepting its cards may cost more, but it can bring more valuable customers.

Can interchange fees be negotiated?

No, interchange fees themselves are non-negotiable for the vast majority of businesses. They are set by the card networks (Visa, Mastercard, etc.) and are the same for all merchants, regardless of their processor. The only entities large enough to potentially negotiate interchange rates are mega-retailers processing billions of dollars annually. For all other businesses, the opportunity for negotiation lies in the processor's markup, which is the 'plus' portion of an Interchange-Plus pricing plan. This is where you can and should compare quotes to secure a better rate.