What merchant services actually are
Merchant services is the infrastructure that lets you accept credit and debit cards—either in person, online, or over the phone. When a customer swipes, taps, or enters their card number, merchant services handles the transaction behind the scenes: it routes the payment to the card network (Visa, Mastercard, American Express), confirms the funds exist, moves money from the customer's bank to yours, and handles disputes if something goes wrong.
You do not own this system. You rent access to it through a merchant services provider—a company that contracts with your bank, the card networks, and payment processors to let you accept cards. The provider charges you fees for this access, and those fees are where most of the cost lives.
If you run a business and take card payments, you are already using merchant services, even if you have never heard the term. The question is whether you understand what you are paying for and whether you are paying too much.
Key Takeaways
- Merchant services fees come in three main types: interchange (set by card networks), assessment fees (set by card networks), and markup (set by your provider), and you pay all three.
- Interchange rates vary by card type, transaction method, and industry, so a restaurant pays different rates than an online retailer, and a rewards card costs more than a basic card.
- Your provider's pricing model—flat rate, tiered, or interchange-plus—determines how transparent your costs are and how much you pay when card types change.
- Monthly statements from your processor should show each fee type separately; if they do not, you cannot tell whether you are being overcharged.
- Switching providers is possible but involves setup time and contract review, so the decision depends on whether your current costs are genuinely high or just unfamiliar.
The three layers of merchant services fees
When a customer pays with a card, three separate entities take a cut. Understanding each one is the only way to know whether you are paying fairly.
Interchange fees go to the customer's bank. These are set by Visa and Mastercard (American Express sets its own), and they vary by card type, how the transaction was processed, and your industry. A rewards credit card might carry 2.87% interchange; a basic debit card might be 0.05%. A restaurant processing a card present transaction pays different rates than an e-commerce business processing a card-not-present transaction. You cannot negotiate interchange—it is the same for every business in your category.
Assessment fees go to the card networks themselves (Visa, Mastercard, Amex). These are typically 0.11% to 0.15% and are also non-negotiable. They are smaller than interchange but they exist on every transaction.
Markup or discount rate is what your merchant services provider keeps. This is where negotiation happens. A provider might add 0.30% to 1.5% on top of interchange and assessments, depending on your volume, industry, and how you negotiate. This is the only fee you can control.
Your monthly statement should break these out separately. If it shows only a single "discount rate" or "processing fee" without showing interchange and assessments underneath, you cannot tell what you are actually paying.
Pricing models: flat rate, tiered, and interchange-plus
Flat-rate pricing means you pay the same percentage on every transaction, regardless of card type. Square, Stripe, and PayPal offer this: 2.9% + $0.30 per online transaction, for example. The advantage is simplicity and predictability. The disadvantage is that you overpay on low-cost transactions (basic debit cards) to subsidize high-cost ones (rewards credit cards). Flat rate works best for small businesses with low volume or for businesses that do not want to think about fees.
Tiered pricing divides cards into buckets—may have access to, mid-may have access to, and non-may have access to—and charges different rates for each. may have access to might be 1.69%, mid-may have access to 2.19%, non-may have access to 3.49%. The problem is that the provider defines which cards go in which tier, and they have an incentive to move expensive cards into higher tiers. Your statement may not show you which transactions fell into which tier, making it impossible to audit. Tiered pricing is common from traditional merchant services companies and is often the worst deal for the business.
Interchange-plus pricing charges you the actual interchange rate (which varies by card) plus a fixed markup (usually 0.25% to 0.50%) plus assessment fees. This is the most transparent model because your statement shows the actual interchange rate for each transaction. You pay more on rewards cards and less on debit cards, but you see exactly why. Interchange-plus is standard among high-volume businesses and is usually the cheapest option if your volume is large enough.
How transaction method affects what you pay
The same card costs different amounts depending on how you process it. Card-present transactions (customer physically present, card swiped or tapped) have lower interchange rates than card-not-present transactions (online, phone, mail order). This is because card-present transactions are harder to dispute—the customer was there, they authorized it in real time.
If you key in a card number manually instead of swiping it, even in person, the rate goes up. If you do not have an address verification system (AVS) for online transactions, the rate goes up. If you do not use a card security code (CVV), the rate goes up. Card networks reward you for reducing fraud risk and punish you for increasing it.
This matters because your provider might not tell you when you are processing transactions in a way that costs more. If you are hand-keying cards that could be swiped, or not using AVS on online orders, you are paying higher rates than you need to. Asking your provider which of your transactions are being downgraded (charged at a higher rate) is a concrete way to find cost savings.
What your monthly statement should show
A clear merchant services statement lists every transaction, the card type, the interchange rate charged, the assessment fee, and the provider's markup. It totals these by category so you can see patterns: how much you paid in interchange, how much in assessments, how much in markup.
If your statement shows only a single line item called "processing fees" or "discount rate," you are not getting the information you need. Request an itemized statement that breaks out interchange, assessments, and markup. If your provider will not provide this, that is a sign they are using tiered pricing and do not want you to see how much you are overpaying on certain card types.
Compare your statement to the current Visa and Mastercard interchange tables (both publish these publicly). If your interchange rates are significantly higher than the published rates for your industry and transaction type, ask your provider why. Sometimes there is a legitimate reason; sometimes it means you are being charged incorrectly.
Switching providers and contract terms
Changing merchant services providers is possible but involves setup time and contract review. Most providers require a contract, often with an early termination fee if you leave before the term ends. Some contracts are month-to-month; others lock you in for two or three years. Before signing, read the termination clause and know what it will cost to leave.
Switching involves updating payment processing at your point-of-sale system, your online checkout, your invoicing software, and anywhere else you accept cards. For a small business this might take a few hours; for a larger one it can take weeks. Some providers will help with the transition; others will not.
The decision to switch depends on whether your current costs are genuinely high or just unfamiliar. If you are on tiered pricing and have never seen an interchange-plus quote, getting one is worth the time. If you are already on interchange-plus with a 0.30% markup and a provider offers 0.25%, the savings may not justify the switching cost. Calculate your annual savings before you move.
Avoiding common merchant services mistakes
The most common mistake is accepting whatever pricing your bank offers without shopping around. Banks often use tiered pricing and do not compete hard on merchant services because they make money whether you process cards or not. Getting quotes from two or three independent merchant services providers takes an hour and often reveals significantly lower rates.
The second mistake is not reading your statement. Many businesses pay merchant services fees without ever looking at the detail. Spending 15 minutes a month reviewing your statement—checking that interchange rates match published rates, that you are not being downgraded unnecessarily, and that the markup has not crept up—catches errors and overpayment.
The third mistake is confusing merchant services with payment processing. Merchant services is the full system; payment processing is one piece of it. A point-of-sale system like Square or Toast includes payment processing but may not give you the best rates if your volume is high. Understanding what you are buying helps you negotiate better.
Frequently Asked Questions
Why do I pay different fees on different cards?
Card networks set different interchange rates based on card type (rewards cards cost more than basic cards), how the transaction was processed (swiped costs less than keyed), and your industry. You cannot change these rates, but you can make sure your provider is charging you the actual rate, not inflating it through tiered pricing.
Can I negotiate my merchant services fees?
You can negotiate the markup—the percentage your provider adds on top of interchange and assessments. Interchange and assessments are set by the card networks and are not negotiable. Providers with high volume or long contracts may offer lower markups. Getting multiple quotes and comparing them is the most effective negotiation tool.
What is the difference between a merchant services provider and a payment processor?
A payment processor is the software and hardware that captures the card information and routes it through the system. A merchant services provider is the company that contracts with the card networks and your bank to let you accept cards at all. You need both, and sometimes they are the same company.
Should I use my bank's merchant services or an independent provider?
Independent providers often offer better rates than banks, especially if your volume is moderate to high. Banks typically use tiered pricing, which is less transparent. Get quotes from both and compare the total cost over a year, accounting for your mix of card types and transaction methods.
What happens if a customer disputes a charge?
The merchant services system handles the dispute process. The customer's bank investigates, and if they rule against you, the money is returned to the customer and charged back to you. You also pay a chargeback fee (usually $15 to $100). Keeping clear records of the transaction and customer communication is your best defense.