Card Network Surcharge Rules: Caps, Registration, and Disclosures

Credit card surcharge rules come from two places at once: the card networks (Visa, Mastercard, American Express, and Discover) and the state where the transaction happens. To add a surcharge legally, a merchant has to surcharge credit cards only, stay under both a network percentage cap and the merchant’s own cost of accepting that card, give the networks and the acquiring bank 30 days’ advance written notice, post disclosures at the door, at checkout, and on the receipt, and confirm that state law doesn’t prohibit the practice. Miss any piece and the fines start at $1,000 per violation, with card-acceptance privileges on the line for repeat problems.

Credit Cards Only

Surcharges are allowed on credit card transactions and nothing else. Every major network prohibits surcharging debit cards and prepaid cards, and that prohibition holds even when a customer runs a debit card on the signature-based “credit” rail rather than entering a PIN.¹ Federal law reinforces the rule by making debit card surcharges illegal nationwide.²

Consumer credit cards, corporate cards, and purchasing cards are all surchargeable so long as the card draws on a line of credit. The practical challenge is card-type identification at the register. Modern point-of-sale systems read the card’s Bank Identification Number and flag credit versus debit automatically. A merchant whose terminal isn’t configured to make that distinction risks surcharging debit cards by accident, which the networks treat as a compliance violation regardless of intent.

The Cap Is Whichever Is Lower

Each network sets its own ceiling, and each network also caps the surcharge at the merchant’s actual cost of accepting that card brand. The lower of the two controls.

Visa: the merchant’s merchant discount rate for the applicable Visa credit card, or 3%, whichever is lower.³
Mastercard: the merchant’s average effective merchant discount rate for Mastercard credit acceptance, or 4%, whichever is lower.²
Discover: no fixed percentage cap, but the surcharge cannot exceed the merchant fee paid to Discover for that card sale.

The cost-of-acceptance test is what actually limits most merchants. A business paying an average of 2.4% to process Visa credit transactions cannot charge 3%, even though 3% is the published Visa cap. The surcharge is capped at 2.4%. This is the design: the surcharge is meant to recover the cost of accepting the card, not to generate additional revenue. Setting a flat 3% or 4% across the board without recalculating against the effective rate for each network is the mistake that most often puts merchants in dispute with their acquirer.

Brand-Level or Product-Level, Not Both

A brand-level surcharge applies the same rate to every credit card on a given network. A product-level surcharge picks a specific card type inside that network, such as Visa Signature or Visa Traditional Rewards, and can set a different rate for each.¹

A merchant has to pick one approach per network. For product-level surcharging on Mastercard, the fee on each product must not exceed the merchant’s cost to accept that specific credit product.² Brand-level is simpler and more common. Product-level tends to appear in industries where premium commercial-card interchange runs materially higher than standard interchange.

Register Thirty Days Before the First Surcharge

A merchant cannot flip on surcharging and start charging today. Each network requires at least 30 days’ advance written notice, delivered both to the network and to the merchant’s acquiring bank.¹⁴

Visa takes notifications through an online form at visa.com/merchantsurcharging.¹ Mastercard’s form asks for the business name, address, phone, email, the number of locations that will surcharge, the sales channel, and whether the surcharge will be applied at the brand level or the product level.⁴ Discover requires the same 30 days’ notice to the network and the acquirer.

The waiting period is neither optional nor waivable. Skipping it exposes the merchant to non-compliance fines starting at $1,000 per violation, assessed on the acquirer and passed through.³ Keep the submission confirmation. It’s the easiest document to produce in an audit and the hardest to recreate after the fact.

Disclosures: Entrance, Checkout, Online, Receipt

The customer should never be surprised by the fee after committing to a purchase. Networks enforce that principle at multiple touchpoints.

In the Store

A sign at the entrance alerts customers before they shop. A second disclosure appears at the register. Both must state the surcharge percentage and clarify that the fee does not exceed the merchant’s cost of acceptance.¹ Mastercard offers sample wording: “We impose a surcharge on credit cards that is not greater than our cost of acceptance.”⁴

Online

For e-commerce, Mastercard requires the surcharge disclosure to appear prominently on the first page that references credit card brands.⁴ If credit card logos or brand names first appear on a product page, that’s where the notice belongs; the final confirmation screen is too late. Visa’s rules similarly require disclosure before the customer commits.

On the Receipt

The receipt has to show the surcharge dollar amount as a separate line item, not folded into the item price and not combined with tax.¹ Mastercard suggests placing the surcharge after the subtotal with a description that clearly identifies it, though it does not mandate exact wording. Some states go further with their own receipt requirements, and at least one state considers labeling the charge a “processing fee” misleading if the amount exceeds actual processing cost. “Surcharge” is the safest label.

Equal Treatment for American Express and Discover

A merchant that surcharges Visa and Mastercard cannot leave American Express or Discover out of the arrangement, or single either one out for worse terms.

American Express requires that any restriction, condition, or fee imposed on an Amex transaction also be imposed equally on all other card brands.⁵ A higher surcharge for Amex is out. So is steering customers toward a different card by suggesting another brand is preferred.

Discover’s operating regulations run parallel: if a merchant surcharges cards on one network, Discover requires surcharges on cards operating on other networks as well. In practice, surcharging Visa and Mastercard while exempting Discover would violate Discover’s rules, and the reverse would violate Amex’s.

State Law Can Override Network Rules

Where state law is stricter than network rules, state law wins. Several states prohibit or substantially restrict credit card surcharges: California, Colorado, Connecticut, Florida, Kansas, Maine, and Massachusetts. Connecticut’s statute is among the broadest, prohibiting a surcharge on any method of payment. Maine and Massachusetts prohibit surcharges on both credit and debit cards. Kansas bars surcharges on either card type as well.

Not every state on older ban lists still belongs there. New York revised General Business Law § 518 in 2024 to allow surcharging under specific conditions: the merchant must post the total credit card price (inclusive of surcharge) in dollars and cents, the surcharge cannot exceed what the card network charges the business, and the final price cannot be higher than the posted price. Two-tier pricing displaying a cash price alongside a credit price is explicitly permitted. Violations carry a civil penalty of up to $500 per occurrence.⁶ Minnesota allows surcharges up to 5% as long as the merchant informs the customer both verbally and by a conspicuously posted sign.

A business with locations in multiple states, or an online seller shipping into restricted states, has to evaluate compliance transaction by transaction, not just location by location. The same practice can be legal on one side of a state line and penalized on the other.

Cash Discount Is a Separate Path

A cash discount program is legally and structurally different from a surcharge, even though the customer’s out-of-pocket math can look identical. With a surcharge, the posted price is the base price and credit users pay more. With a cash discount, the posted price already reflects the cost of card processing, and cash-paying customers get a reduction. Federal law protects a merchant’s right to offer cash discounts, and network rules treat them differently.⁵

A properly structured cash discount program does not require 30-day network registration, does not trigger the percentage caps, and is legal even in states that ban surcharging. The structural requirement is real: the program must actually be a discount from a higher posted price, not a surcharge with a different label. Posting a single price and then adding a fee at the register for card users is a surcharge no matter what the merchant calls it, and the full set of network rules applies. American Express permits discounts for cash, check, debit card, or other credit cards, provided the discount doesn’t single out Amex cardholders for worse treatment than other brands.⁵

What Non-Compliance Costs

Fines land on the acquirer first and flow through to the merchant. Visa’s enforcement begins with a non-compliance assessment of $1,000 or more against the acquirer of any merchant identified as surcharging improperly.³ Uncorrected violations can escalate to $25,000, and in severe cases Visa may revoke the merchant’s ability to accept Visa cards. Mastercard follows a similar escalation path, with termination as the final step.

State enforcement adds another layer. Where surcharging is banned, violations can draw state attorney general investigations and civil suits. New York’s statute allows a civil penalty of up to $500 per violation.⁶ In states with consumer protection statutes that reach deceptive pricing, a pattern of improper surcharging can raise class-action exposure as well.

1
Visa. Surcharging Credit Cards Q&A for Merchants
2
Mastercard. Mastercard Credit Card Surcharge Rules and Fees
3
Visa. U.S. Merchant Surcharge Q and A
4
Mastercard. Merchant Surcharge FAQ
5
American Express. Merchant Operating Guide
6
New York State Senate. New York General Business Law 518