How Do Credit Card Processing Fees Work?

Quick Answer

Credit card processing fees are what a merchant pays on every credit card transaction. These fees are a percentage of the transaction amount plus a small fixed fee. They are composed of three main parts: the interchange fee (paid to the card-issuing bank), the assessment fee (paid to the card brand like Visa or Mastercard), and the payment processor's markup. As of May 2026, the total fee typically ranges from 1.5% to 3.5% depending on the card type, transaction method, and processor.

Deconstructing the Transaction: The Four Key Players

The Customer's Bank (Issuing Bank)

This is the financial institution that provides the credit card to the customer. Think of Chase, Bank of America, or your local credit union. The issuing bank loans the customer the money to make the purchase and is a key player in the fee structure.

Your Bank (Acquiring Bank)

The acquiring bank, also known as the merchant bank, is the bank that a merchant uses to accept credit card payments. It receives the payment from the issuing bank and deposits it into the merchant's account.

The Card Network

These are the companies that facilitate the communication between the issuing and acquiring banks. The most well known card networks are Visa, Mastercard, American Express, and Discover. They set the interchange rates and charge their own fees, known as assessment fees.

The Payment Processor

This is the company that acts as the intermediary, connecting the merchant to the card networks and acquiring banks. Processors like Stripe, Square, and Whop provide the technology and services needed to accept credit card payments. They bundle the interchange and assessment fees and add their own markup.

The Three Core Components of Processing Fees

Understanding the three core components of credit card processing fees is the first step to taking control of your costs. Here’s a breakdown of each part:

These three components are bundled together to form the total fee you pay on each transaction. As a merchant, you have the most control over the processor's markup by choosing a provider with a favorable pricing model. For more details on how to get the most favorable rates, check out our guide to lower credit card processing fees.

Interchange Fees Explained: The Bulk of the Cost

Interchange fees make up the largest portion of your processing costs, typically accounting for 70% to 90% of the total fee. These fees are set by the card networks twice a year, in April and October, and are paid to the issuing bank. The justification for these fees is that the issuing bank is taking on the risk of the transaction. They are essentially lending their customer the money for the purchase, and the interchange fee compensates them for that risk.

What Determines Interchange Rates?

Interchange rates are not a single, flat fee. They vary widely based on several factors, including:

• Card Type: Business cards, rewards cards, and high-limit cards typically have higher interchange fees than standard debit cards.
• Transaction Method: Card-present transactions (where the card is physically swiped, dipped, or tapped) are considered lower risk and have lower interchange fees than card-not-present transactions (online or over the phone).
• Merchant Category Code (MCC): Your MCC, a four-digit number that identifies your business type, can also affect your interchange rates.

For high volume merchants, even a small difference in interchange rates can have a huge impact on the bottom line. That's why working with a processor that can help you qualify for the lowest possible interchange rates is so important.

Card Network (Assessment) Fees: The Cost of the Rails

Assessment fees are the second component of your processing costs. These fees are paid directly to the card networks for the use of their payment rails. Unlike interchange fees, which are paid to the issuing bank, assessment fees are the card networks' primary source of revenue. They are a small percentage of the transaction amount and are generally non-negotiable.

As of early 2026, here are the current assessment fees for the major card networks:

• Visa: 0.14%
• Mastercard: 0.13%
• Discover: 0.13%
• American Express: 0.15%

While these fees are a small part of the overall cost, they can add up, especially for businesses processing a high volume of transactions.

Payment Processor Markups: Where Prices Diverge

The processor's markup is the final piece of the puzzle and the one where you have the most control. This is the fee that your payment processor charges for their services, which include providing the technology for accepting payments, routing the transaction, and offering customer support. Processors use a few different pricing models to apply their markup:

Flat-Rate Pricing

With flat-rate pricing, you pay a single, predictable rate for all transactions, regardless of the card type or transaction method. This is the model used by processors like Square (2.9% + $0.30) and Stripe (2.9% + $0.30). While simple and predictable, this model can be more expensive for businesses that process a mix of transactions, as the flat rate is set high enough to cover the cost of even the most expensive cards.

Interchange-Plus Pricing

Interchange-plus pricing is a more transparent model where the processor passes on the actual interchange and assessment fees and then adds a fixed markup. This allows you to see exactly what you're paying and why. For businesses with steady growth, this model is often the most cost effective. Whop offers interchange-plus pricing, with markups that can lead to effective rates 2.4-2.7% lower than Stripe for high volume merchants.

Tiered Pricing

Tiered pricing groups transactions into different tiers, usually "qualified," "mid-qualified," and "non-qualified," with a different rate for each tier. This model is less common now, as it can be confusing and often leads to higher costs. Many processors hide the fact they use this model, so it's important to ask for a detailed breakdown of your pricing.

For a deeper dive into how Whop's pricing compares to other popular processors, check out our Whop vs. Stripe guide.

How Whop Compares to Stripe, Square, and PayPal

When it comes to choosing a payment processor, the options can be overwhelming. To help you make an informed decision, here's a comparison of how Whop stacks up against some of the most popular processors in the industry:

As you can see, for businesses processing over $100,000 per month, Whop offers a significant advantage in terms of both cost and support. The custom interchange-plus pricing model can lead to substantial savings, and the dedicated Slack channel ensures that you get the support you need when you need it. Plus, with no chargeback liability and powerful BNPL options, Whop is a strong contender for any high-growth business. Ready to see how much you could save? Get a custom rate quote today.

If you're considering a move from Stripe, our guide on the best Stripe alternatives offers even more insights.

Beyond Transaction Fees: Other Costs to Watch For

While transaction fees make up the bulk of your processing costs, there are other fees to be aware of. These can vary depending on your processor and your contract, so it's important to read the fine print before signing up.

• Monthly Fees: Some processors charge a monthly fee for account maintenance, statement fees, and other services.
• PCI Compliance Fees: The Payment Card Industry Data Security Standard (PCI DSS) is a set of security standards designed to protect cardholder data. Some processors charge a fee to help you maintain compliance.
• Chargeback Fees: If a customer disputes a charge, your processor may charge a fee to handle the chargeback process. This can range from $15 to $100 per chargeback, regardless of the outcome. Whop's model as a Merchant of Record, however, means you have zero chargeback liability.
• Terminal and Gateway Fees: If you're using a physical terminal or an online payment gateway, there may be additional monthly or per-transaction fees associated with that technology.

By understanding all the potential fees, you can get a more accurate picture of your true processing costs and make a more informed decision when choosing a provider.

The Impact of Processing Fees on High-Ticket Sales

For businesses that sell high-ticket items, credit card processing fees can be a major expense. A 3% fee on a $10,000 sale is $300, a significant amount that directly impacts your profit margin. This is where offering flexible payment options like Buy Now, Pay Later (BNPL) can be a game-changer. Not only can BNPL increase your conversion rates by making high-ticket items more accessible, but it can also help you manage your processing costs.

Whop offers two powerful BNPL solutions for high-ticket products:

• ClarityPay: Allows customers to finance purchases up to $30,000.
• Splitit: Lets customers split payments up to $20,000 on their existing credit card.

By integrating these options into your checkout, you can give your customers more flexibility while also potentially lowering your overall processing fees. To learn more about how BNPL can benefit your business, check out our guide to BNPL for high-ticket products.

Frequently Asked Questions