What credit card payment processing is and who handles it
When you swipe, tap, or enter a credit card number to pay for something, that transaction does not go straight from the customer's bank to the merchant's bank. Instead, it moves through a chain of companies, each taking a small cut. Understanding this chain matters because the fees you pay depend on which processors you use and what type of card the customer presents.
The main players are the card networks (Visa, Mastercard, American Express, Discover), the customer's bank (the issuer), the merchant's bank (the acquirer), and the payment processor in the middle. The processor is the company that actually moves the money and handles the technical connection between the merchant's point of sale and the banking system. Some processors also act as the acquirer, meaning they hold the merchant account directly.
For a small business or freelancer, you typically sign up with one processor and they handle the rest. For larger operations, you may work with a processor, an acquirer, and a gateway as separate vendors. The processor's job is to authorize the transaction in real time, settle the funds into your account, and handle disputes and chargebacks.
Key Takeaways
- Payment processors charge interchange fees (set by card networks), assessment fees (set by card networks), and processor markups, which vary by card type and transaction method.
- Swiped or dipped cards cost less to process than keyed-in or online transactions because the card network sees less fraud risk.
- Monthly statement fees, batch fees, and chargeback fees are common add-ons that can total $20 to $100 per month depending on your volume.
- Flat-rate processors charge the same percentage on every transaction regardless of card type, while interchange-plus processors pass through the actual network fees and add a fixed markup.
- Settlement typically takes one to three business days, and you should confirm the processor's reserve policy before signing because some hold back a percentage of revenue.
How the fee structure breaks down
Every credit card transaction involves three layers of fees. The first is interchange, which is the fee the card network charges the merchant's bank, who passes it to the processor. Interchange rates are set by Visa and Mastercard and vary by card type (debit, credit, rewards card), transaction method (in-person, online, phone), and industry. A rewards credit card swiped in person might cost 1.5% to 2.2%, while a keyed-in transaction or online purchase might cost 2.2% to 3.5%.
The second layer is assessment fees, also set by the card networks. These are smaller — typically 0.13% to 0.30% — and cover the networks' operating costs. Visa and Mastercard publish their rates publicly, so these numbers do not vary between processors.
The third layer is the processor markup, which is where the processor makes its money. This is the only part you can negotiate. Markup might be a flat percentage (0.5% to 1.5%), a per-transaction fee ($0.10 to $0.30), or both. Some processors quote interchange-plus pricing, meaning they show you the actual interchange rate plus their markup separately. Others quote a flat rate, meaning they charge the same percentage on every transaction regardless of the card type or method.
Beyond per-transaction fees, most processors charge monthly statement fees ($10 to $25), batch fees ($0.25 per batch, which is usually one per day), PCI compliance fees ($10 to $20 per month), and chargeback fees ($15 to $100 per dispute). If you process less than $1,000 per month, these fixed fees can represent a significant percentage of your revenue.
Flat-rate versus interchange-plus pricing models
A flat-rate processor charges you the same percentage on every transaction — for example, 2.9% plus $0.30. This is straightforward to understand and budget for, but you pay the same rate whether the customer uses a basic debit card (which costs the processor less) or a premium rewards card (which costs more). Over time, if your customers use mostly rewards cards, flat-rate pricing becomes expensive.
An interchange-plus processor shows you the actual interchange rate the card network charges, plus a fixed markup from the processor. For example, you might see "interchange + 0.5% + $0.10 per transaction." This is more transparent and usually cheaper if your customers use standard cards, but the total cost varies transaction by transaction, making budgeting harder. If your customers use mostly premium cards, you still pay more, but you see exactly why.
Flat-rate is most common for small businesses, online sellers, and service providers because the simplicity is worth the slightly higher cost. Interchange-plus is more common for restaurants, retail stores, and high-volume merchants where the savings add up. Some processors offer tiered pricing as a middle ground: they charge one rate for basic cards, a higher rate for rewards cards, and the highest rate for corporate or international cards.
In-person, online, and phone transaction costs
The card network charges different interchange rates depending on how the card is presented, because the fraud risk is different. An in-person transaction where the card is physically swiped or dipped is the lowest risk, so interchange is lowest — typically 1.5% to 2.2% for a standard credit card. The network can see the card is real and the cardholder is present.
An online transaction where the customer enters the card number manually is higher risk because the card is not present and the network cannot verify the cardholder. Interchange for online transactions is typically 2.2% to 3.5% for the same card type. Phone transactions fall in between, usually around 2.0% to 2.8%, because the merchant can verify the cardholder's identity verbally but the card is still not present.
If you accept cards in multiple ways — for example, in-person at a store and online through a website — your processor will break out the fees by method on your statement. This is why some businesses push customers toward in-person payment: the cost is lower. It is also why online-only businesses cannot negotiate their interchange rates down; the network has already set them based on the transaction type.
Settlement, reserves, and when money hits your account
After a transaction is authorized, the processor does not when ready deposit the money into your merchant account. Instead, transactions are batched — usually once per day — and sent to your bank for settlement. Settlement typically takes one to three business days, meaning a transaction on Monday might not appear in your account until Wednesday or Thursday.
Some processors hold a reserve, which is a percentage of your revenue that they keep in a separate account as protection against chargebacks and fraud. A reserve might be 5% to 10% of your monthly volume, held for 6 to 12 months. This is common for high-risk industries (e-commerce, subscription services, travel) and for new merchants. Before you sign up, ask whether the processor holds a reserve, how much, and when it is released. A reserve can tie up significant cash if your business is growing.
You should also ask about the processor's chargeback policy. When a customer disputes a transaction, the processor charges you a fee (usually $15 to $100) and may deduct the disputed amount from your account when ready. If you have a high chargeback rate, the processor may increase your fees or terminate your account. Most processors allow a chargeback rate of 0.5% to 1% before they take action.
Choosing between payment processors
The lowest-cost processor is not always the best choice because cost is only one factor. You should compare processors on fee structure (flat-rate or interchange-plus), monthly minimums or fixed fees, settlement time, reserve policy, chargeback policy, and customer support quality. If you process less than $5,000 per month, the difference between processors might be $10 to $30 per month, which is small enough that ease of use and support matter more than the lowest rate.
If you process more than $20,000 per month, the difference between processors can be $100 to $500 per month, which is worth negotiating. At that volume, you have leverage to ask for lower interchange-plus markups or to negotiate fixed fees. Some processors will also waive monthly fees if your volume is high enough.
You should also consider whether the processor integrates with your point-of-sale system, accounting software, or e-commerce platform. A processor that integrates directly with your system saves time on reconciliation and reduces the chance of errors. If you use Square, Stripe, PayPal, or another all-in-one platform, you do not choose the processor separately; the platform handles it for you.
Industry-specific and high-risk processing
Some industries are considered higher risk by payment processors because they have higher chargeback rates or fraud rates. These include e-commerce, subscription services, travel, adult services, gambling, and high-ticket items. If your business falls into one of these categories, you may pay higher interchange rates, be required to hold a larger reserve, or have trouble finding a processor at all.
High-risk merchants often work with specialized processors that understand their industry and have relationships with banks willing to take on the risk. These processors typically charge higher fees — sometimes 3% to 5% or more — but they are the only option if mainstream processors decline you. Before you sign up with a high-risk processor, read the contract carefully for reserve requirements, chargeback limits, and termination clauses.
Frequently Asked Questions
Why does my processor charge different rates for different card types?
The card networks (Visa and Mastercard) set different interchange rates based on the card type because the fraud risk is different. A basic debit card costs less to process than a premium rewards card. Your processor passes through the network's rate and adds its own markup on top. If you use flat-rate pricing, you pay the same percentage on all cards, but you are essentially subsidizing the cost of rewards cards with the savings from basic cards.
Can I negotiate my processing fees?
You can negotiate the processor's markup (the part they keep), but not the interchange or assessment fees, which are set by the card networks. If you process more than $20,000 per month, most processors will negotiate their markup down or waive monthly fees. If you process less, you have little leverage, and the processor's time to negotiate may not be worth their effort.
What happens if a customer disputes a charge?
The customer's bank investigates the dispute and either sides with the customer or the merchant. If the customer wins, the processor deducts the amount from your account and charges you a chargeback fee ($15 to $100). If you have too many chargebacks, the processor may raise your fees, require a larger reserve, or close your account. You can fight chargebacks by providing evidence (receipts, tracking numbers, customer communication) to the processor.
How long does it take for money to appear in my account after a sale?
Settlement typically takes one to three business days. Transactions are batched once per day (usually at night) and sent to your bank. Your bank then processes the batch and deposits the money into your account. Weekends and holidays can extend the timeline. Some processors offer next-day settlement for an extra fee, but this is usually only worth it if you need the cash urgently.
What is a payment gateway and do I need one?
A payment gateway is the software that securely transmits card information from your website or point of sale to the processor. If you use an all-in-one platform like Stripe or Square, the gateway is built in. If you use a traditional processor, you may need to buy a gateway separately or use one your processor recommends. Most modern processors include a gateway, so you do not need to buy one separately.