What a payment processor actually does
A payment processor is the company that sits between your customer's card (or bank account) and your business bank account. When someone buys something from you, the processor doesn't hold the money or decide whether the transaction is safe—it moves the transaction data to the right places, collects fees, and deposits what's left into your account on a set schedule.
The processor is not the same as the payment gateway (the software your customer sees) or the acquiring bank (the bank that holds your business account). The processor does the technical work of routing the transaction through the card networks and fraud checks, then reporting back to you whether it went through.
Think of it this way: the gateway is the checkout form, the processor is the machinery that reads the form and sends it where it needs to go, and the acquiring bank is the place that eventually gives you the money.
Key Takeaways
- A payment processor routes transaction data from your customer's card to the card network, the customer's bank, and your acquiring bank, then reports the result back to you.
- The processor charges a fee per transaction (usually 2 to 3 percent plus a flat amount) and holds the money for a settlement period before depositing it into your account.
- Settlement typically takes one to three business days, though some processors offer next-day or same-day options for an additional fee.
- The processor runs fraud checks and can decline transactions, hold funds, or reverse payments if something looks suspicious or if a customer disputes the charge.
- Different processors have different fee structures, settlement speeds, and rules about what kinds of businesses they will work with.
The step-by-step path a transaction takes
When a customer enters their card details at checkout, the payment gateway encrypts that information and sends it to the processor. The processor does not store the card number—it passes the encrypted data along to the card network (Visa, Mastercard, American Express, or Discover).
The card network routes the request to the customer's bank, which checks whether the account has enough money and whether the transaction looks legitimate. The bank says yes or no, and that answer travels back through the card network to the processor, which tells your gateway whether the transaction went through.
If approved, the processor collects the transaction details and holds the funds. It does not deposit money into your account when ready. Instead, it batches all your transactions together and settles them on a schedule—usually once per day, though the timing depends on your processor and your account type.
During settlement, the processor deducts its fees, any chargebacks or refunds from earlier transactions, and any holds it placed on your account. What remains goes into your acquiring bank account, typically one to three business days after the transaction occurred.
How processors charge fees and what affects the cost
Most processors charge a percentage-plus-fixed fee per transaction. A typical rate is 2.9 percent plus $0.30 per card transaction, though this varies widely depending on your industry, your sales volume, and the type of card used (debit cards often cost less than rewards credit cards).
Some processors also charge monthly fees, batch fees, gateway fees, or PCI compliance fees. A few charge nothing per transaction but take a percentage of your settlement instead. The fee structure you see depends on whether you signed up for interchange-plus pricing (you pay the card network's actual rate plus the processor's markup), tiered pricing (the processor groups transactions into tiers and charges a flat rate per tier), or flat-rate pricing (one rate for all transactions).
Interchange-plus is usually cheapest if your sales volume is high, because you only pay what the card networks actually charge plus a small processor markup. Tiered and flat-rate pricing are simpler to understand but often cost more in the long run, because the processor builds in a cushion for different card types.
High-risk businesses—those with high chargeback rates, refund rates, or sales in certain industries like adult services or gambling—pay higher fees or may be declined by mainstream processors altogether.
Settlement timing and why processors hold your money
The time between when a customer's bank approves a transaction and when you see the money in your account is called the settlement period. Most processors settle once per day, usually in the evening, and the funds arrive in your bank account one to three business days later.
Processors hold your money during this period for two reasons: to make sure the customer's bank actually transfers the funds (sometimes a bank approval is reversed after the fact), and to cover chargebacks and refunds that may come in later. If a customer disputes the charge or requests a refund within 30 to 180 days, the processor can pull the money back from your account even if you have already spent it.
Some processors offer faster settlement—next-day or same-day deposits—but charge an extra fee (usually 0.5 to 1 percent of the transaction) or require you to maintain a higher reserve balance. A reserve is money the processor holds in a separate account and releases slowly over time, as a cushion against future chargebacks.
If your chargeback rate is high, your processor may hold a larger reserve or extend your settlement period to two weeks or longer. This is a common reason small businesses feel like they are not getting paid quickly enough—the processor is protecting itself against the risk that you will receive a chargeback and the money will have already left your account.
Fraud detection and transaction holds
Processors run every transaction through fraud filters before settlement. These filters look for patterns: a card used in two countries in one hour, a purchase amount much larger than the customer's usual spending, a card that matches a known fraud list, or a transaction from a high-risk location.
If a transaction triggers a filter, the processor can decline it outright, approve it but flag it for review, or place a temporary hold on the funds. A hold means the money is not deposited into your account on the normal schedule—it stays with the processor while a human reviewer or automated system decides whether the transaction is legitimate.
Holds can last anywhere from a few hours to several days. If the processor decides the transaction is safe, it releases the hold and deposits the money. If it decides the transaction is fraudulent, it reverses the charge and the customer's bank refunds the money to them.
You have limited control over fraud filters. You can usually adjust sensitivity (stricter or looser) in your processor's dashboard, but you cannot see the exact rules the processor uses. If you are getting too many false positives (legitimate transactions being declined), you can contact your processor's support team and ask them to whitelist certain customers or adjust your risk profile.
What happens when a customer disputes or refunds a charge
A refund is when you or the customer initiates a reversal of the transaction. You can refund a customer through your processor's dashboard, and the money goes back to the customer's card within one to three business days. The processor deducts the refund amount from your next settlement.
A chargeback is when the customer's bank reverses the transaction without your permission, usually because the customer claims they did not make the purchase, the merchant charged them twice, or the goods never arrived. Chargebacks bypass you entirely—the customer's bank contacts the card network, which contacts your processor, which pulls the money back from your account.
When a chargeback happens, you lose not only the transaction amount but also a chargeback fee (usually $15 to $100 per chargeback, depending on your processor). You can dispute a chargeback by submitting evidence to your processor—a tracking number, a signed delivery confirmation, an email from the customer acknowledging the purchase—but the burden is on you to prove the transaction was legitimate.
If your chargeback rate climbs above a certain threshold (usually 0.5 to 1 percent of your total transactions), your processor can terminate your account or move you to a high-risk category with higher fees and longer settlement periods.
Choosing between processors and what to compare
Different processors have different fee structures, settlement speeds, fraud rules, and restrictions on what kinds of businesses they will accept. A processor that works well for a clothing store may not work for a subscription service, a marketplace, or a business that operates internationally.
When comparing processors, look at the total cost per transaction (percentage plus fixed fee plus any monthly fees), the settlement timeline (how many days until money hits your account), the reserve policy (whether they hold a percentage of your sales), and the chargeback policy (what happens if your chargeback rate goes up).
Also check whether the processor supports the payment methods your customers use—some processors handle only cards, while others also support bank transfers, digital wallets, or regional payment methods. If you sell internationally, confirm that the processor can handle multi-currency transactions and cross-border payments.
Read the contract carefully for termination clauses. Some processors can shut down your account with little notice if your chargeback rate spikes or if they decide your business is too risky. Others require 30 to 90 days' notice or allow you to dispute the decision.
Frequently Asked Questions
Why does it take three days for my money to show up if the customer's bank approved the transaction when ready?
The processor holds your money during the settlement period to make sure the customer's bank actually transfers the funds and to cover chargebacks that may come in later. Banks sometimes reverse approvals after the fact, and customers can dispute charges for up to 180 days. The processor uses this buffer to protect itself and you from losing money you have already spent.
Can a processor refuse to work with my business?
Yes. Processors have underwriting teams that review your business type, your sales volume, your chargeback history, and your industry. Certain industries—adult services, gambling, high-ticket items, subscription services with high refund rates—are considered high-risk and may be declined by mainstream processors. You can still find processors that work with high-risk businesses, but they charge higher fees.
What is the difference between a processor and a payment gateway?
The gateway is the software your customer sees at checkout—the form where they enter their card details. The processor is the company that takes that information and routes it through the card networks and banks. You need both, and they often come from different companies, though some providers offer both services together.
If my processor goes out of business, what happens to my money?
Money that has already settled into your acquiring bank account is yours and is protected by your bank. Money that is still in the processor's settlement queue may be delayed or lost, depending on the processor's bankruptcy proceedings. This is why it is important to choose a processor that is established and regulated—they are required to keep customer funds separate from their own operating money.
Can I use multiple processors at the same time?
Yes, many businesses use two or more processors to reduce risk and compare fees. You can route different payment methods through different processors, or use one as a backup if the other goes down. However, each processor will have its own fees and settlement schedule, so you will need to track multiple accounts and reconcile them separately.