How to Choose a Payment Gateway for Your Business
What a payment gateway actually does, and why the choice matters
A payment gateway is the software that sits between your customer, their bank, and your bank. When someone enters a card number on your website or in your store, the gateway encrypts it, sends it to the card networks (Visa, Mastercard, American Express), checks with the customer's bank that the money is there, and tells you yes or no in seconds. It does not hold the money — that is the job of a payment processor, which is often the same company or a partner company.
The gateway you choose affects three things: how much you pay per transaction, how fast you get your money, and what happens when something goes wrong. A gateway that costs you 2.9% per sale instead of 3.5% saves you hundreds of dollars a month if you process $10,000 in sales. A gateway that deposits money the next business day instead of five days later changes your cash flow. A gateway with poor fraud detection can cost you chargebacks — refunds you have to pay back plus a fee.
There is no single "best" gateway because the right choice depends on what you sell, how you sell it, how much you sell, and whether you need features like invoicing, subscriptions, or international payments. This guide walks you through how to compare them on the things that actually matter to your business.
Key Takeaways
- Payment gateways charge you a percentage of each sale (usually 2.2% to 3.5%), a flat fee per transaction (usually $0.20 to $0.30), or both, and these rates vary by card type and whether the card is present or not.
- The time between a customer's payment and money in your bank account ranges from next business day to five business days depending on the gateway and your bank, and slower deposits cost you in working capital.
- Gateways differ in what they charge for refunds, chargebacks, failed transactions, and monthly minimums, so comparing the full fee schedule matters more than the headline rate.
- Your industry affects which gateways will work for you — some refuse high-risk businesses like cannabis, gambling, or adult services, and some charge extra for them.
- Integration with your point-of-sale system, shopping cart, or accounting software can take hours or days, so checking compatibility before you sign up saves time and frustration.
How payment gateway fees actually work
Most gateways charge you in one of three ways: a percentage of the sale, a flat fee per transaction, or both. A typical structure is 2.9% plus $0.30 per transaction. That means a $100 sale costs you $3.20. A $10 sale costs you $0.59. The percentage eats you alive on small transactions; the flat fee eats you alive on large ones.
The rate also changes based on how the card is used. A card physically present in your store (swiped or inserted) costs less than a card entered by hand or online, because the risk of fraud is lower. A card used for a subscription or recurring charge may have a different rate than a one-time sale. American Express often costs more than Visa or Mastercard. Debit cards may cost less than credit cards.
Beyond the per-transaction fee, watch for: monthly minimums (some gateways charge you $10 to $25 even if you process nothing), refund fees (some charge you to give money back), chargeback fees (usually $15 to $100 when a customer disputes a charge), failed transaction fees (some charge you when a card declines), and setup fees (usually $0 to $100 one-time). Read the full fee schedule before you commit. A gateway with a low headline rate but high chargeback fees can cost you more than one with a higher headline rate but strong fraud tools.
Settlement speed: when you actually get your money
Settlement is the day your money lands in your bank account. Most gateways offer next-business-day settlement, meaning a sale on Monday lands Tuesday. Some offer same-day settlement for an extra fee. Some hold your money for two to five business days, which is slower and costs you if you need cash to buy inventory or pay staff.
Settlement speed depends on three things: the gateway's policy, your bank's policy, and your industry. A retail store with low fraud risk may get next-day settlement. A subscription business or a business in a high-risk category (like e-commerce supplements or digital goods) may get three- to five-day settlement. If you are new, the gateway may hold your money longer while they watch your account for fraud.
If you need money faster, some gateways offer instant payouts or same-day settlement for a fee — usually 1% to 2% of the transaction. That is expensive, but if you need working capital, it may be worth it. Ask the gateway what their standard settlement is for your type of business, and whether they offer faster options.
Fraud detection and chargeback protection
A chargeback happens when a customer tells their bank "I did not authorize this charge" or "I never received the goods." The bank reverses the charge, takes the money back from you, and charges you a fee (usually $15 to $100). If you get too many chargebacks, the gateway can close your account.
Good fraud detection catches suspicious transactions before they settle, so you can review them or decline them. Poor fraud detection lets fraudulent charges through, and you find out weeks later when the chargeback hits. Some gateways include basic fraud detection for free. Others charge extra for advanced tools like 3D Secure (which adds a second verification step), address verification, or machine learning that learns your normal sales patterns.
If you sell digital goods, ship internationally, or take card-not-present payments (online or phone), your chargeback rate will be higher than a retail store. Some gateways refuse these businesses entirely. Others accept them but charge higher rates or require you to buy chargeback protection insurance. Ask the gateway what their chargeback rate is for your industry, and what tools they include to prevent them.
Integration with your existing systems
A payment gateway has to talk to your website, your point-of-sale system, your shopping cart, and your accounting software. If it does not, you end up manually entering data or paying someone to build a bridge between them. That is expensive and error-prone.
Before you choose a gateway, check whether it works with your specific tools. If you use Shopify, most major gateways have a Shopify app that takes minutes to install. If you use a custom-built website, you may need a developer to integrate the gateway's API (application programming interface). If you use Square or Toast for point-of-sale, they have their own built-in gateways, and switching to a different one means ripping out your whole system.
Ask the gateway: Do you have a plug-and-play integration for my platform? If not, do you have API documentation? Will your support team help me integrate, or do I need to hire a developer? How long does integration usually take? A gateway that integrates in an hour is worth more than one that takes a week, even if the rates are slightly higher.
Industry restrictions and high-risk pricing
Some industries are considered high-risk by payment processors because they have high chargeback rates, legal complexity, or regulatory scrutiny. These include cannabis, gambling, adult services, cryptocurrency, pharmaceuticals, firearms, and multi-level marketing. Some gateways refuse these industries entirely. Others accept them but charge 2x to 3x the normal rate.
If you are in a high-risk industry, you have fewer options, and you will pay more. Some gateways specialize in high-risk businesses and charge reasonable rates; others are generalists that will accept you but at a premium. Ask the gateway directly: Do you accept my industry? If yes, what is your rate for my type of business? Do you have any restrictions on how I market or what I sell?
Even if your industry is not on the restricted list, the gateway may flag you if your chargeback rate gets too high or if they see suspicious patterns in your sales. If that happens, they may freeze your account, hold your money longer, or close you down. The best protection is to keep your chargeback rate low by using fraud detection and delivering what you promise.
Comparing gateways side by side
| Feature | What to look for | Why it matters |
|---|---|---|
| Per-transaction rate | 2.2% to 3.5% depending on card type and how it is used | Lower rate saves money on every sale; compare across all card types, not just the headline rate |
| Flat fee per transaction | $0.20 to $0.30 per transaction | Adds up fast on high-volume, low-value sales; matters less if your average sale is large |
| Settlement time | Next business day, or 2 to 5 business days | Faster settlement means better cash flow; slower settlement costs you if you need working capital |
| Monthly minimum | $0 to $25 per month | Hurts if you are just starting out; matters less once you are processing $1,000+ per month |
| Chargeback fee | $15 to $100 per chargeback | High fees punish you twice — once for the lost sale, once for the fee; good fraud detection prevents chargebacks |
| Fraud detection | Basic (free) to advanced (extra fee) | Prevents chargebacks and protects your account; essential if you take card-not-present payments |
| Integration | Plug-and-play app, API, or custom build | Easy integration saves time and money; hard integration requires a developer and delays launch |
| Industry restrictions | Check whether your industry is accepted | Some gateways refuse certain industries; others accept them at a premium rate |
Frequently Asked Questions
Do I need a separate payment gateway and payment processor?
Not always. Many companies offer both — the gateway (the software) and the processor (the backend that moves money) as one product. Stripe, Square, and PayPal are examples. Some businesses use a gateway from one company and a processor from another, but that adds complexity. For most small businesses, a single provider that does both is simpler and cheaper.
What is the difference between a payment gateway and a payment processor?
The gateway is the software that encrypts the card and sends it to the networks. The processor is the company that actually moves the money between banks. In practice, they are often the same company or closely integrated, so you do not have to think about them separately. The gateway is what you interact with; the processor is what happens behind the scenes.
Can I use multiple payment gateways at the same time?
Yes, and some businesses do. You might use Stripe for online sales and Square for in-person sales, for example. The downside is that you have to reconcile payments from multiple sources, and you may pay higher rates because you are processing less volume with each one. Most small businesses stick with one gateway to keep things simple.
What happens if my payment gateway closes my account?
Your account can be closed if your chargeback rate is too high, if you violate the gateway's terms of service, or if you are in an industry they no longer accept. If it happens, you lose the ability to process payments immediately. That is why it is important to keep your chargeback rate low and to read the terms of service before you sign up. Have a backup gateway ready in case your primary one closes.
How do I know if a gateway is right for my business?
Ask yourself: What is my average sale size? How many transactions do I process per month? Do I sell online, in person, or both? What is my industry? Do I need recurring billing or invoicing? Once you answer those, compare gateways on the full fee schedule (not just the headline rate), settlement speed, fraud detection, and integration with your systems. Most gateways offer a free trial or demo — use it to test before you commit.