The merchant discount rate is the percentage-based fee a business pays every time it accepts a credit or debit card payment. For most businesses, the total lands between 2% and 3% per transaction, though the exact figure depends on the card the customer uses, how the payment is entered, and the industry you’re in. That percentage is not one fee going to one company. It gets split among the bank that issued your customer’s card, the card network (Visa, Mastercard, Discover, American Express), and the payment processor that connects your point-of-sale system to those networks. Understanding where each slice goes is the first step toward controlling what you pay.
What the Fee Is Made Of
Interchange Fees
The largest piece of every transaction goes to the bank that issued your customer’s card. Interchange compensates that bank for fronting the money, carrying fraud risk, and maintaining the cardholder’s account. Rates vary by card type, transaction method, and merchant category. A standard consumer credit card swiped in person might carry an interchange rate of around 1.70% plus $0.10, while a premium rewards card for the same transaction could run 2.30% plus $0.10.1Visa. Visa USA Interchange Reimbursement Fees The card networks publish these rates in long schedules with hundreds of categories, and individual merchants cannot negotiate them.
Assessment Fees
Card networks charge their own fees on every transaction. These fund the network infrastructure that routes payment data between the customer’s bank and yours. Assessment fees are typically a small fraction of a percent applied to your total monthly processing volume. They’re non-negotiable and tend to be uniform across each network’s merchants.
Processor Markup
Your payment processor adds its own charge on top of interchange and assessments. This markup is how the processor earns its profit and covers customer support, fraud monitoring, statements, and the technology linking your terminal to the networks. Of the three main components, the processor markup is the only one you can negotiate. Businesses with higher monthly volume or lower chargeback rates have more leverage.
Incidental Fees
Processors commonly tack on additional charges that add up quickly if you aren’t watching for them. Chargeback fees hit every time a customer disputes a transaction, typically $15 to $35 per dispute. PCI compliance fees are monthly charges tied to payment card data security standards, and processors may add a non-compliance penalty of $20 to $100 per month if you haven’t completed the required annual security questionnaire. Batch fees, statement fees, and gateway fees for online payment portals also show up on many statements. These line items rarely appear in marketing materials, so read the full fee schedule before signing anything.
What Drives Your Rate Up or Down
Card Type
Not all cards cost the same to accept. Rewards and premium cards carry higher interchange because the issuing bank uses that revenue to fund points and cash-back programs. A Visa Infinite card can carry an interchange rate 0.50% or more above a basic card for the same transaction.1Visa. Visa USA Interchange Reimbursement Fees Corporate and purchasing cards tend to sit at the high end as well. You can’t control which card a customer hands over, but this is why your effective rate shifts from month to month.
Card-Present vs. Card-Not-Present
How the payment is entered matters more than most merchants realize. When a customer taps, dips, or swipes a physical card, the transaction qualifies for lower interchange because fraud risk is lower. Online orders, phone payments, and manually keyed entries are classified as card-not-present and cost more. Visa’s published rate for an exempt business debit card is 1.70% plus $0.10 for card-present versus 2.45% plus $0.10 for card-not-present.1Visa. Visa USA Interchange Reimbursement Fees For e-commerce businesses, those higher rates are a fixed cost of doing business.
Merchant Category Code
Every business is assigned a four-digit Merchant Category Code based on its industry. Card networks use the code to set the baseline interchange rate. Industries with higher historical fraud or chargeback rates get assigned higher fees. Grocery stores and gas stations tend to see lower interchange because their transactions are high-frequency and low-risk. Restaurants, travel agencies, and online retailers often pay more.
Monthly Volume
Higher processing volume gives you leverage when negotiating with a processor. Businesses running tens of thousands of dollars monthly can often secure lower per-transaction markups and may qualify for volume discounts on assessment fees. If your volume has grown significantly since you signed your current agreement, that alone is reason to shop around.
Debit Cards and the Durbin Cap
Not all debit transactions are cheap, and the reason is the size of the bank that issued the card. The Durbin Amendment, part of the Dodd-Frank Wall Street Reform and Consumer Protection Act, caps debit card interchange fees charged by large banks. Banks with $10 billion or more in assets can charge no more than 21 cents plus 0.05% of the transaction value per debit card swipe.2eCFR. 12 CFR 235.3 – Reasonable and Proportional Interchange Transaction Fees Banks meeting certain fraud-prevention standards can add 1 cent per transaction.3Federal Reserve System. Debit Card Interchange Fees and Routing
Banks below the $10 billion threshold are exempt, and their debit interchange rates stay significantly higher. The Federal Reserve’s own data shows that average per-transaction interchange for exempt (smaller) issuers has consistently run well above that of covered issuers.3Federal Reserve System. Debit Card Interchange Fees and Routing A debit card from a community bank or credit union may actually cost you more to accept than one from a national bank.
The Federal Reserve proposed lowering the cap in late 2023 to 14.4 cents plus 4.0 basis points, with periodic updates. As of early 2026 that proposal has not been finalized, and the original cap remains in effect.2eCFR. 12 CFR 235.3 – Reasonable and Proportional Interchange Transaction Fees
Pricing Models Your Processor Will Offer
Flat-Rate
Flat-rate pricing charges the same percentage and fixed fee on every transaction regardless of card type. A typical structure is 2.6% plus $0.30 or 2.9% plus $0.30. Forecasting costs is simple, which is why low-volume businesses often prefer it. The trade-off is that you overpay on cheaper card types (like regulated debit) to subsidize the simplicity. As your volume grows, a more transparent model usually wins.
Interchange-Plus
Interchange-plus separates the base interchange cost from the processor’s markup, so you can see exactly what the card network charges and exactly what your processor adds on top. A quote might read “interchange + 0.20% + $0.10 per transaction.” This is the most transparent model and usually the cheapest for businesses processing more than a few thousand dollars monthly. Because you pay actual interchange on each transaction rather than a blended average, you benefit directly whenever a customer uses a lower-cost card.
Tiered
Tiered pricing groups transactions into categories labeled qualified, mid-qualified, and non-qualified. The processor decides which bucket each transaction falls into based on card type and entry method. Qualified transactions get the lowest rate, non-qualified the highest. The criteria are set by the processor and often poorly disclosed, which makes this the least transparent model and often the most expensive. If a processor pitches you a great “qualified” rate, ask what percentage of your transactions will actually land in that bucket.
Subscription (Membership)
Some processors charge a flat monthly fee (often $49 to $199) and pass through interchange at cost with a small per-transaction charge. It works like interchange-plus but replaces the percentage markup with a predictable subscription. High-volume businesses sometimes save the most under this model because the per-transaction markup is minimal once the monthly fee is spread across enough sales.
How to Lower What You Pay
Negotiate the Markup
Interchange and assessments are fixed. The processor’s markup is not. Get quotes from multiple processors and make sure each quote uses the same pricing model so the comparison is honest. If you’re on tiered pricing, moving to interchange-plus alone can produce meaningful savings. Pay attention to incidental fees as well. A lower per-transaction markup means nothing if the processor makes it up through monthly minimums, PCI fees, and statement charges.
Read the Contract Term
Many processing agreements include multi-year terms with early termination fees that can run from a few hundred dollars to much more when the contract contains liquidated damages clauses. Before signing, ask whether the agreement is month-to-month or has a fixed term, and read the cancellation provisions carefully. Getting locked into a three-year contract at unfavorable rates is one of the more expensive mistakes a small business can make.
Offer a Cash Discount
Federal law prohibits card issuers from preventing you from offering a discount to customers who pay with cash, check, or debit instead of credit. Under 15 U.S.C. ยง 1666f, this right is protected as long as the discount is available to all buyers and clearly posted.4Office of the Law Revision Counsel. 15 USC 1666f – Inducements to Cardholders by Sellers of Cash Discounts A cash discount is legally distinct from a surcharge. You’re lowering the price for cash buyers rather than adding a fee to card users, and that distinction matters both legally and in how customers perceive it.
Consider a Credit Card Surcharge
Surcharging passes the processing cost directly to customers who pay by credit card. Mastercard caps surcharges at 4% or your actual cost of acceptance, whichever is lower.5Mastercard. What Merchant Surcharge Rules Mean to You Federal law prohibits surcharging on debit card transactions entirely. Several states either ban credit card surcharges outright or cap them below the network maximum. Connecticut and Massachusetts are among the states with full prohibitions; Colorado caps surcharges at 2%. Check your state’s current law before implementing a surcharge program. Network rules also require advance notice to your processor and clear signage at the point of sale.
What Shows Up on Your 1099-K
Payment processors report your card transaction volume to the IRS on Form 1099-K. The amount reported in Box 1a is the gross total of all card transactions before any fees, refunds, or discounts are subtracted.6Internal Revenue Service. IRS Revises and Updates Form 1099-K Frequently Asked Questions The 1099-K will show a higher number than what hit your bank account. Processing fees, chargebacks, and refunds are deductible business expenses you subtract when reporting income.
For 2026, third-party settlement organizations are required to file Form 1099-K for merchants who exceed $20,000 in gross payments and 200 transactions during the calendar year.7Internal Revenue Service. 2026 Publication 1099 Keep detailed records of processing fees even if you fall below that threshold. For a business processing $500,000 annually at a 2.5% effective rate, that’s $12,500 in deductions you don’t want to miss.