Credit Card Processing Fees for E-commerce Businesses

Published August 6, 2026 · Updated August 6, 2026

Accepting credit and debit cards online is a baseline requirement for most U.S. e-commerce businesses, yet the fee structure behind every online checkout is rarely explained in plain terms. This guide covers what online payment processing fees include, why card-not-present transactions affect cost, and how to calculate and review your own numbers. See the full guides list for related topics.

1. What online stores pay to accept cards

When a customer completes a checkout and pays by card, the full sale amount does not arrive in the merchant's bank account. A portion is retained as processing cost. That cost is made up of several distinct components — and no single advertised rate captures all of them.

E-commerce businesses face a structural cost that most physical retailers do not: virtually every card transaction is card-not-present. The card is not physically read by a terminal, which typically places e-commerce transactions in higher-cost interchange categories compared with in-person chip or contactless payments. Understanding this distinction is the starting point for evaluating online payment processing fees. For a thorough breakdown of each fee type, see merchant account fees explained.

2. Why online payments are card-not-present

Card networks classify transactions based on how and where the card is used. A card-present transaction occurs when a physical card is read by a terminal — chip inserted, card tapped, or stripe swiped — at the point of sale. A card-not-present (CNP) transaction occurs when the card is not physically read: the cardholder enters card details on a checkout page, over the phone, or through a recurring billing system.

Standard online checkout is card-not-present by definition. The card-network interchange schedules published by Visa and Mastercard contain separate programs and rates for card-present and card-not-present environments. There is no single Visa or Mastercard "e-commerce rate" — published interchange schedules contain many programs, card types, transaction types, and qualification rules. The card-not-present environment for e-commerce transactions generally results in higher applicable interchange compared with card-present alternatives, all else equal.

Visa publishes its U.S. interchange rates at usa.visa.com and Mastercard at mastercard.com. These schedules can and do change.

3. Components of an e-commerce processing bill

Interchange

Interchange generally passes between the acquiring bank (your bank) and the card-issuing bank (the customer's bank) on each transaction. It is set by the card networks, not your processor, and is only one component of the merchant discount rate you ultimately pay. Rates vary by card type, transaction type, merchant category code, and other qualifying factors. Ordinary merchants do not directly negotiate card-network interchange schedules.

Card-network assessments

Assessments are fees charged directly by Visa, Mastercard, Discover, and American Express for use of their payment networks. They are typically a small percentage of sales and appear as separate line items on interchange-plus statements. Like interchange, network assessments are underlying costs set by the card networks; their presentation to merchants depends on the pricing model in use, and they are not ordinarily negotiable directly by the merchant.

Provider markup

Your payment processor or payment service provider adds its own margin on top of interchange and assessments. This markup may be expressed as an additional percentage, a per-transaction fee, a flat monthly fee, or a combination. It is the component that varies most between providers and is most subject to comparison and negotiation. Merchants may compare provider markup, contract terms, and other provider-controlled fees — but interchange and network assessments are pass-through costs.

Per-transaction charges

A fixed dollar amount charged on each individual payment attempt or authorization, regardless of the order value. For e-commerce businesses with smaller average order values, per-transaction fees can represent a meaningful share of total cost. For stores with higher average orders, the percentage-based component dominates.

Gateway fees

A payment gateway is the technology that securely transmits card data from your checkout to the payment processor. Gateway providers typically charge a monthly fee, a per-transaction fee, or both. These fees are a real cost of accepting online payments. If your gateway is billed on a separate invoice from your merchant account statement, include those fees when calculating your effective rate — omitting them understates your true cost.

Monthly, statement, PCI, and other fixed fees

Fixed costs include monthly account or statement fees, PCI compliance or non-compliance fees, minimum monthly fees, batch-settlement fees, and other recurring charges. A PCI non-compliance fee is charged when the required annual Self-Assessment Questionnaire has not been completed; completing those steps may prevent or remove this fee depending on your processor and agreement. Fixed fees raise your effective rate in lower-volume months because they are the same dollar amount regardless of sales.

Cross-border and international card charges

Transactions made with cards issued outside the United States may incur additional network fees — often called cross-border or international assessment fees — on top of standard interchange and assessments. These fees vary by network and card type. Online stores that sell to international customers should identify whether cross-border fees appear on their statements and how they are billed.

Refund fees and chargeback fees

Refunds reverse a customer payment. Any original processing fee retained by the provider and any separate refund or reversal fee should be included in the all-in cost. Treatment varies by provider and agreement. Chargebacks occur when a customer disputes a charge directly with their card issuer. Important: authorization approval does not prevent a customer from later filing a chargeback. A provider may charge a dispute or chargeback administration fee. Whether it applies, is waived, or is returned can vary by provider, agreement, and outcome, so merchants should review their own statements and contracts.

4. What affects e-commerce processing cost

• Card mix: Basic consumer debit cards generally carry lower interchange than standard credit cards. Premium rewards, travel, business, and corporate cards carry higher interchange. International cards may incur additional cross-border fees. The blend of card types your customers use directly affects your blended effective rate.
• Average order value: Fixed per-transaction fees have a larger proportional impact on lower-value orders. A $0.20 per-transaction fee represents 0.20% of a $100 order but 2.00% of a $10 order. Stores with lower average order values carry a higher effective per-transaction cost burden.
• Monthly transaction volume: Higher transaction volume amplifies the impact of per-transaction fees and dilutes fixed monthly costs across more sales. Both effects influence the effective rate.
• International and cross-border transactions: If a significant portion of your customers use internationally issued cards, cross-border fees and higher interchange tiers can raise your blended effective rate.
• Transaction data submitted: Submitting complete and accurate transaction data — such as address verification (AVS), order ID, and other fields supported by your provider — can affect interchange qualification. Incomplete data may result in transactions qualifying at higher-cost categories.
• Recurring billing and stored credentials: For subscription and recurring billing, using correct stored-credential or recurring indicators in transaction data is required under card-network rules. Customers must consent to recurring charges, billing and cancellation terms must be clear, and retry practices must comply with network requirements. Merchants should not store full card details in plain text; use tokenization systems. PCI DSS prohibits storing CVV, CVC, CID, or similar verification codes after authorization, even with customer permission.
• Refunds and returns: A high return or refund rate means more reversals. Some processors retain processing fees on refunded transactions. The original sale fee and any reversal fee both count toward total processing cost.
• Failed authorizations and retries: Failed authorization attempts may generate fees depending on your provider. Retry practices that do not follow network rules can result in additional costs or account restrictions.
• Disputes and chargebacks: A provider may charge a dispute or chargeback administration fee. Whether it applies, is waived, or is returned can vary by provider, agreement, and outcome, so merchants should review their own statements and contracts. High dispute rates can affect account standing. Authorization approval does not prevent a later chargeback.
• Pricing model: Flat-rate, interchange-plus, tiered, and subscription-style pricing all distribute costs differently for the same underlying card mix and transaction volume.

5. Payment method comparison

The table below summarizes the main cost factors and review points for each payment method an e-commerce business commonly uses. It does not present fixed rates — actual costs depend on card type, network, your processor agreement, and other factors specific to each transaction. When choosing between payment methods, consider total cost, customer experience, settlement timing, return and dispute handling, and operational requirements.

This table is for general comparison purposes only. It does not present fixed rates or benchmarks.

6. Gateways, tokenization, and digital wallets

Payment gateways

A payment gateway encrypts and routes card data from your checkout to the processor for authorization. Most e-commerce businesses require a gateway, either bundled into an all-in-one provider or as a standalone service. Gateway fees — monthly, per-transaction, or both — are a real processing cost and should be included in your effective-rate calculation.

Tokenization

Tokenization replaces sensitive card data with a non-sensitive token that can be stored and used for subsequent charges without exposing actual card details. It is a security practice that supports PCI DSS compliance. For recurring billing and card-on-file arrangements, merchants should use processor- or gateway-supported tokenization or another compliant provider-managed stored-credential solution — never store raw card details or CVV themselves. Tokenization does not in itself guarantee lower interchange or processing rates — the transaction still processes as card-not-present and is subject to applicable interchange categories.

Digital wallets

Digital wallets such as Apple Pay, Google Pay, and similar services allow customers to pay using a device-stored token rather than entering full card details at checkout. They can improve checkout conversion and reduce manual data-entry errors. However, digital wallets do not automatically reduce processing fees. The underlying card type and network still determine interchange, and whether a wallet transaction qualifies differently than a standard checkout depends on the network, card type, and your provider's billing practices. Review your statements to understand how wallet-initiated transactions appear and are priced.

7. Pricing models for e-commerce businesses

Payment processors offer several ways to structure fees. For a detailed comparison, see the guide to flat-rate vs. interchange-plus vs. tiered pricing and the Flat-Rate vs. Interchange-Plus Calculator.

This table is for general comparison purposes only. This guide does not recommend any specific provider or pricing model.

8. How to calculate your e-commerce effective processing rate

Your merchant statement contains everything you need. The How It Works page explains the formula in detail, and the effective-rate guide walks through step-by-step instructions for locating each number.

1. 1Collect at least three recent merchant processing statements from normal trading periods. Avoid months distorted by one-time fees, unusually low volume, or a high number of disputes.
2. 2Record total gross card sales (the amount charged to customer cards) for each period. Use gross processed sales, not net deposits after fees.
3. 3Identify all processing-related fees: interchange, network assessments, provider markup, per-transaction fees, monthly account fees, PCI fees, and any other charges on your processing statement.
4. 4If your gateway is billed separately, add those fees to your total for a complete effective-rate calculation.
5. 5Avoid double-counting fees already included in a total fees line on the statement.
6. 6Do not count disputed transaction principals as processing fees — only the chargeback fee itself is a cost.
7. 7Divide total processing fees by total card sales for each month, then multiply by 100.
8. 8Compare results across multiple months to identify trends or fee increases.
9. 9Use the free Merchant Fee Analyzer calculator to confirm your numbers and compare with an alternative quote.

9. Hypothetical monthly calculation example

Notice that the 2.60% percentage-based charge is not the effective rate. The effective rate of 2.90% is higher because it incorporates per-transaction charges and gateway and fixed fees. This is why comparing a quoted percentage rate to your own effective rate — without accounting for all fee components — can lead to inaccurate cost estimates. The numerator (total fees) and denominator (gross card sales) must cover the same period.

For guidance on reading each line of your statement, see How to Read a Merchant Processing Statement. To understand what your result means in context, see What Is a Good Effective Credit Card Processing Rate?

10. How to review an e-commerce merchant statement

For a detailed walkthrough of the typical sections of a merchant statement, see the guide on how to read a merchant processing statement. For an online store, pay particular attention to:

• Interchange detail by card category: On interchange-plus statements, each card type appears as its own line. Look for high-cost categories that may indicate a large share of rewards, business, or international cards.
• Cross-border fees: If your store receives international orders, look for cross-border or international assessment line items. Identify what share of your volume is from internationally issued cards.
• Gateway fees: Confirm whether gateway costs appear on your merchant statement or on a separate invoice. Include all gateway charges in your effective-rate calculation.
• PCI compliance or non-compliance fees: Identify whether you are being charged a non-compliance fee. If so, contact your provider for instructions on completing the required Self-Assessment Questionnaire.
• Transaction fees on failed authorizations: Identify whether your provider charges for failed authorization attempts in addition to successful transactions.
• Chargeback and retrieval fees: Note how many disputes occurred, the fee per dispute, and whether any fees were returned after a resolved dispute.
• Monthly minimums: If your actual processing fees fall below a contractual minimum in any month, you are charged the difference.
• Platform or app fees billed separately: Some e-commerce platforms include separate payment or app fees. Review whether any of these overlap with fees already on your processing statement.
• Fee increases from prior months: Compare current fees to recent months and to the same period last year. Unexplained increases are worth querying with your provider.

11. Practical cost-reduction steps

The steps below are general suggestions. No guide can guarantee savings. Outcomes depend on your specific agreement, card mix, volume, and negotiation. For a more detailed review process, see the guide on reviewing and reducing processing costs.

• Calculate your effective rate across several normal statement periods before drawing conclusions.
• Separate percentage, per-transaction, gateway, fixed, and dispute-related fees when reviewing statements so you can identify which components are largest.
• Review your domestic and international card mix. If a significant share of transactions come from internationally issued cards, identify what cross-border fees apply.
• When requesting or comparing quotes, use the same monthly card sales volume, transaction count, average order value, card mix, and estimated international split for each provider.
• Ask providers to break out interchange, network assessments, and their own markup separately so you can compare each component.
• Identify whether you are paying duplicate or overlapping fees from your e-commerce platform and your payment provider for the same service.
• Review your failed authorization rate and retry practices. Uncontrolled retries that do not follow network rules can generate fees and account flags.
• Submit complete and accurate transaction data — such as AVS, order ID, and other fields your provider supports — to support proper interchange qualification.
• Use AVS, authentication, fraud scoring, and other verification tools to reduce disputes. Clearer return, refund, subscription, billing, and cancellation terms can also reduce chargebacks.
• Review recurring billing practices: confirm stored-credential indicators are used correctly, customer consent is documented, and billing terms are clearly communicated.
• Complete your annual PCI Self-Assessment Questionnaire. Doing so may prevent or remove non-compliance fees depending on your provider and agreement.
• Compare provider markup and contract terms — including length, early-termination fee, and rate-change notice provisions — across written quotes.
• Review chargeback patterns and the documentation you retain to respond to disputes.
• Consider whether any suitable non-card payment methods — such as ACH transfers for higher-value B2B orders — are appropriate for your business model.
• After any pricing change, recalculate your effective rate from actual statements to confirm the impact.

12. PCI DSS and checkout security

The Payment Card Industry Data Security Standard (PCI DSS) applies to any organization that stores, processes, or transmits payment-account data. E-commerce businesses that accept card payments are subject to PCI DSS requirements. The scope of your obligations depends on how your checkout is implemented and whether card data passes through your systems.

PCI DSS v4.0.1, published by the PCI Security Standards Council, includes explicit protections related to payment-page script authorization, integrity verification, and tamper monitoring. These requirements are relevant to e-commerce businesses whose checkout pages load third-party scripts, even when payment data is processed by a hosted gateway. Using a hosted or redirect checkout does not remove every PCI DSS obligation — confirm your specific responsibilities with your provider and a qualified security assessor.

• Confirm your PCI DSS responsibilities with your payment provider. The type of Self-Assessment Questionnaire that applies depends on your integration method.
• Keep your e-commerce platform, payment plugins, and checkout integrations updated.
• Limit administrative access to payment systems and use multi-factor authentication (MFA).
• Review checkout scripts regularly. Payment-page skimming (e-skimming) is an active threat: see the PCI SSC guidance on payment-page security and preventing e-skimming.
• Monitor payment pages for unauthorized changes.
• Never store CVV, CVC, CID, or similar card verification codes after authorization is obtained. PCI DSS prohibits this, even with customer permission, even for recurring billing purposes.
• Use properly implemented hosted payment solutions where appropriate to reduce the scope of card data your systems handle.
• Use tokenization for stored-credential and recurring billing arrangements rather than storing raw card details.

PCI DSS documentation is available through the PCI SSC Document Library. This section is for general informational purposes only and does not constitute security or compliance advice.

13. Online credit card surcharges

Some online stores consider passing a portion of credit card processing costs to customers through a surcharge. A credit card surcharge is different from a cash-discount program. Both are subject to their own rules and disclosure requirements.

Visa's current U.S. surcharge rules

Under Visa's published U.S. Merchant Surcharge Q&A:

• A merchant must notify its acquirer at least 30 days before beginning to surcharge.
• Surcharges may only be applied to eligible credit card transactions. They must not be applied to debit cards or prepaid cards.
• The surcharge amount may not exceed the lower of the applicable merchant discount rate or 3%.
• Merchants should work with their acquirer or processor to identify the surcharge correctly.
• Clear disclosures are required at the online checkout and on receipts.

Other card brands publish their own surcharge rules, which may differ. State and local laws may impose additional restrictions or prohibitions that vary by jurisdiction and can change over time. This guide does not list states where surcharging is prohibited, as those rules change. Before implementing a surcharge on any online checkout, confirm current requirements with your processor or acquirer and with qualified legal counsel. This article is for general informational purposes only and does not constitute legal, tax, financial, security, or compliance advice. See the full disclaimer.

14. Frequently asked questions

Related guides

15. Sources and methodology

This guide draws on publicly available materials from the following official sources. No fabricated statistics, invented benchmarks, or unverified third-party rates are used. All examples are hypothetical and labeled as such.

• Visa USA Interchange Reimbursement Fees (effective April 18, 2026)
• Visa — Credit Card Processing Fees and Interchange Rates
• Mastercard — Interchange Rates and Fees
• PCI Security Standards Council — Standards
• PCI SSC — Document Library
• PCI SSC — Payment Page Security and Preventing E-Skimming
• PCI SSC — Card Verification Code Storage FAQ
• Visa — Stored Credential Transaction Framework
• Visa — U.S. Merchant Surcharge Q&A

Interchange schedules, network rules, PCI DSS requirements, and legal requirements change over time. Readers should verify current requirements directly with the relevant card networks, their payment provider, the PCI Security Standards Council, and qualified legal counsel before making decisions.