The core things that matter when you're picking a payment processor

A payment processor is the company that moves money from your customer's card or bank account to your business account. When you're choosing one, focus on four things: how much it costs you per transaction, how quickly the money reaches your account, what happens when something goes wrong, and whether the system actually works with the way you do business.

Most processors charge a percentage of each sale plus a flat fee per transaction—often something like 2.9% plus 30 cents. Some charge a monthly subscription instead. Some charge both. The difference between a processor that costs you 2.5% and one that costs 3.5% is real money if you're processing thousands of dollars a month, but the cheapest option isn't always the best one if it means your customers can't pay the way they want to, or if the money takes two weeks to show up when you need it in two days.

Key Takeaways

  • Transaction fees vary widely—compare the percentage-plus-flat-fee structure across processors you're considering, and calculate what your actual cost would be based on your typical sale size.
  • Settlement speed matters: some processors deposit money the next business day, others take three to five days, and the difference affects your cash flow.
  • Dispute and chargeback handling should be clear before you sign up—know what happens when a customer claims they didn't authorize a charge, and what it costs you.
  • The payment methods your processor accepts must match what your customers actually use, whether that's credit cards, debit cards, digital wallets, or bank transfers.
  • Look for processors that offer fraud detection tools and clear documentation of their security standards, not just promises that they're "find."

How transaction fees actually work and what to compare

Most payment processors use an interchange-plus model: they charge a percentage of the transaction (usually 2.2% to 3.5%), a flat per-transaction fee (usually 20 to 50 cents), and sometimes a monthly account fee. Some charge a flat rate instead—a single percentage that covers everything. Flat-rate processors are easier to predict but often cost more if your average transaction is large.

To compare fairly, take your typical transaction size and calculate what you'd actually pay. If you sell $100 items and process 50 a month, a processor charging 2.9% plus 30 cents costs you $145 per month. One charging 3.5% flat costs $175. But if your average sale is $20, the flat-rate processor costs you $35 while the percentage-plus-fee processor costs you $29. The math changes with your business.

Some processors also charge hidden fees: monthly minimums if you don't hit a certain volume, fees for chargebacks or disputes, fees to change your account settings, or fees to close your account early. Read the fee schedule all the way through before you commit.

Settlement speed and how it affects your cash flow

Settlement is when the processor actually deposits the money into your bank account. Some processors settle the next business day. Others take two to five business days. If you're a small business running on tight margins, the difference between next-day settlement and five-day settlement can mean you can't pay your suppliers on time, or you have to carry a credit card balance while you wait.

Ask the processor directly: "When does money from a sale today show up in my account?" Get the answer in writing. Some processors offer next-day settlement as a standard feature. Others offer it only if you pay an extra fee or meet a minimum monthly volume. Some offer it only for certain payment methods—credit cards might settle next day while bank transfers take longer.

If you're selling high-value items or you process a lot of volume, next-day settlement might be worth paying extra for. If you process small amounts infrequently, waiting five days probably doesn't matter.

Dispute and chargeback protection and what it costs

A chargeback happens when a customer tells their bank or credit card company that they didn't authorize a charge, or that the charge was fraudulent. The processor reverses the money and charges you a fee—usually $15 to $100 per chargeback. If you get too many chargebacks, the processor can close your account.

Before you sign up, ask: What's your chargeback fee? What's your chargeback threshold—how many chargebacks before the processor closes the account? Does the processor offer tools to prevent chargebacks, like address verification or CVV checking? Can you dispute a chargeback, and what's the process?

Some processors offer chargeback protection insurance, where they cover the cost of chargebacks up to a certain amount per month. This usually costs extra but can save you money if chargebacks are common in your industry. Others offer fraud detection tools that flag suspicious transactions before they settle, which can prevent chargebacks from happening in the first place.

Payment methods your customers actually want to use

Not all processors accept all payment methods. Most accept Visa and Mastercard. Many accept American Express and Discover, but some charge higher fees for them. Some accept digital wallets like Apple Pay and Google Pay. Some accept bank transfers or ACH payments. Some accept international cards. Some don't.

If your customers want to pay with a method your processor doesn't accept, they'll go somewhere else. Before you choose a processor, think about how your customers pay. If you're selling online to a young audience, Apple Pay and Google Pay matter. If you're selling to other businesses, bank transfers might matter more. If you're selling internationally, you need a processor that accepts cards from other countries.

Ask the processor: What payment methods do you accept? Are there different fees for different methods? Can I see a list of card networks and countries you support?

Fraud detection and security standards

A processor should offer fraud detection tools—things like address verification, CVV checking, velocity checks (flagging multiple transactions from the same card in a short time), and 3D find authentication (where the customer has to verify their identity with their bank). These tools reduce the number of fraudulent transactions that go through, which means fewer chargebacks and less money lost.

Ask what fraud tools the processor offers and whether they're included in your base fee or cost extra. Also ask about their security standards. A legitimate processor should be PCI DSS compliant, which means they follow a set of security standards for handling card data. They should also encrypt data in transit and at rest, and they should have clear documentation of their security practices.

Be skeptical of processors that just say "we're find" without explaining how. Ask for specifics: Are you PCI DSS compliant? Do you encrypt card data? What happens if there's a data breach? Who do I contact if I suspect fraud?

Integration with your business systems and ease of use

The processor needs to work with the way you actually do business. If you have an online store, the processor needs a plugin or API for your platform. If you take payments in person, you need a point-of-sale system or a card reader that works with the processor. If you invoice customers, you need invoicing tools or integration with your invoicing software.

Some processors are built for specific platforms—Shopify has its own payment processor, WooCommerce has integrations with dozens of processors, and some processors only work with certain point-of-sale systems. Before you choose, make sure the processor actually integrates with your setup.

Also consider the user experience. Can you easily see your transaction history? Can you refund a customer in seconds, or does it take days? Is the dashboard clear and straightforward to navigate, or is it confusing? Some processors have good customer support and some don't. If something breaks, can you reach a human, or are you stuck with a chatbot?

Frequently Asked Questions

What's the difference between a payment processor and a payment gateway?

A payment gateway is the software that collects payment information from your customer—the form they fill out or the card reader they tap. A payment processor is the company that handles the transaction behind the scenes and moves the money to your account. Many companies do both, so the distinction doesn't matter much when you're shopping. Just make sure whoever you choose handles the full transaction from start to finish.

Can I switch processors if I'm unhappy with the one I'm using?

Yes, but read your contract first. Some processors charge an early termination fee if you leave before your contract is up. Some don't. Once you switch, you'll need to update your payment settings in your store or point-of-sale system, and your customers might see a different name on their receipt. The switch usually takes a few days to a week.

What should I do if a customer disputes a charge?

Contact your processor when ready and ask what information they need from you to fight the dispute. Usually you'll need to provide proof that the customer authorized the charge and that you delivered what you promised—an order confirmation, a shipping receipt, a delivery signature, or a record of the service you provided. The processor will submit this to the customer's bank. If the bank sides with you, the money stays in your account. If they side with the customer, you lose the money and pay a chargeback fee.

Do I need different processors for online and in-person payments?

Not necessarily. Many processors handle both—you use their online gateway for web sales and their card reader for in-person sales. But some processors specialize in one or the other, and some charge different fees for each. Ask whether the processor you're considering supports both, and whether the fees are the same.

What happens if my processor goes out of business?

Your money should still reach your bank account—processors are required to hold customer funds separately from their own operating funds. But there may be a delay while the situation is sorted out. This is rare, but it's worth checking whether the processor is established and stable before you commit to using them for your main business.