The three main ways to accept credit cards
You can accept credit cards through a payment processor — a company that handles the transaction between your customer's bank and yours. The three routes are: a point-of-sale (POS) system if you have a physical location, an online payment gateway if you sell on a website, or a mobile card reader if you take payments on the go. Each one connects to a merchant account, which is where the money lands after fees are taken out.
The processor you choose depends on your business type and how much you sell. A coffee shop needs different tools than an online store, and a freelancer taking occasional payments needs something different from both. Start by identifying which setup matches how you actually do business right now — not how you might expand later.
Key Takeaways
- You need a merchant account (opened through a payment processor) before you can accept any credit card, and the processor takes a fee from each transaction.
- Point-of-sale systems work for brick-and-mortar shops; payment gateways work for websites; mobile readers work for payments anywhere.
- Fees vary by processor and card type, so comparing three options before you commit saves money over time.
- Your processor handles fraud protection and deposits money to your bank account, usually within one to three business days.
Setting up a merchant account
A merchant account is a business bank account specifically for credit card transactions. You cannot accept credit cards without one. To open one, you work with a payment processor — companies like Square, Stripe, PayPal, Toast, or Clover are common examples, though many banks offer their own processors too.
When you sign up, the processor will ask for your business license, tax ID, and information about your average monthly sales. They use this to assess risk and set your fee structure. The whole process usually takes a few days to a week. Once approved, you get access to the tools you need — whether that is a card reader, a website plugin, or a checkout page — and a bank account where deposits land.
You do not need to switch your main business bank account. The merchant account is separate and exists only to receive card payments. Money typically moves from there to your regular business account automatically, or you can transfer it manually.
Point-of-sale systems for physical locations
If you run a retail shop, restaurant, salon, or any business where customers pay in person, a point-of-sale system (POS) is the standard tool. It is a combination of hardware — a card reader, a tablet or computer, a receipt printer — and software that rings up sales, tracks inventory, and records transactions.
Popular POS systems include Square, Clover, Toast (for restaurants), and Shopify POS. Most charge a flat monthly fee plus a per-transaction fee. Some also charge a percentage of each sale. You own or lease the hardware, and the processor handles the credit card part. The system stores transaction history and can generate reports on what sold and when.
A POS system also handles cash and other payment types at the same register, so your customers can pay however they want. If you are just starting out and do not need inventory tracking, a basic mobile card reader (described below) may be cheaper. But if you have multiple employees, multiple locations, or complex inventory, a full POS system pays for itself quickly.
Online payment gateways for websites and apps
If you sell online — through your own website, Shopify, WooCommerce, or any e-commerce platform — you need a payment gateway. This is software that sits on your checkout page and securely sends the customer's card information to the processor without you ever seeing the full card number.
Stripe and PayPal are the most common gateways for small businesses. Both integrate with most website builders and shopping carts in minutes. You paste a code snippet into your site, and the checkout page appears. Customers enter their card details, and the processor handles the rest. Money lands in your merchant account within one to three business days.
Gateways charge a percentage of each transaction (usually 2.2% to 3.5%) plus a small fixed fee per transaction. Some charge monthly minimums; others do not. If you sell a small volume, a gateway with no monthly fee makes sense. If you sell a high volume, a processor that offers lower per-transaction rates might be worth the monthly cost.
Mobile card readers for payments anywhere
A mobile card reader is a small device that plugs into your phone or tablet and lets you take payments anywhere — at a customer's home, at a market, at a pop-up event. Square Reader, PayPal Here, and Clover Go are common examples. You swipe or insert the card, the customer signs on the screen, and the transaction goes through.
Mobile readers are the cheapest way to start accepting cards if you do not have a physical location yet. Hardware costs between $20 and $100, and per-transaction fees are similar to POS systems — usually 2.6% to 3.5% plus a fixed amount per transaction. There is no monthly fee for most mobile readers.
The downside is that mobile readers are slower than a POS system and do not track inventory or employee sales. They work well for service providers (plumbers, consultants, trainers), freelancers, and small retailers. If you grow into a full retail operation, you will eventually upgrade to a POS system, but a mobile reader is a good low-risk starting point.
Understanding fees and comparing processors
Every processor charges fees, and they vary. The main ones are: a per-transaction fee (a fixed amount like $0.30 per sale), a percentage fee (a percentage of the sale amount, usually 2% to 3.5%), a monthly fee (if you use a full POS or gateway), and sometimes a batch fee (a small charge to settle your transactions each day).
Credit cards also come in different types — Visa, Mastercard, American Express, Discover — and processors sometimes charge different rates for each. Premium cards like American Express often cost more to accept. Some processors bundle all card types into one rate; others charge separately.
Before you commit to a processor, get pricing from at least three. Tell them your average monthly sales and ask for their full fee schedule in writing. Then calculate what you would pay on a typical month of sales with each one. The difference can be hundreds of dollars a year. Also ask about setup fees, early termination fees, and whether rates change if your sales volume changes.
Security and fraud protection
When you accept credit cards, you are responsible for protecting customer card information. The good news is that modern processors handle most of this for you. They use encryption to scramble card data so it cannot be read if intercepted, and they follow PCI compliance — a set of security standards that all card processors must meet.
You never store a customer's full card number on your own computer or system. The processor stores it in their find vault, and you only see the last four digits. This protects you from liability if there is a data breach — the processor is responsible, not you, as long as you use their official tools and do not try to store card data yourself.
Processors also flag suspicious transactions — like a card used in two different countries within an hour, or a sudden spike in sales — and can block them or ask for verification. You can set your own fraud rules too, like declining cards from certain countries or flagging orders over a certain amount.
Frequently Asked Questions
How long does it take for money to show up in my bank account?
Most processors deposit money within one to three business days. Some offer next-day deposits for a higher fee. Weekend and holiday deposits may take longer. You can usually see pending transactions in your merchant account when ready, even if the money has not hit your bank yet.
What if a customer disputes a charge or claims they did not authorize it?
This is called a chargeback. The processor investigates and asks you for proof — a receipt, an email confirmation, a signature, shipping records. If you can prove the customer authorized the charge and received what they paid for, you keep the money. If not, the charge is reversed and you lose the sale. Keep records of all transactions for at least six months.
Can I accept credit cards without a business license?
Most processors require a business license or tax ID to open a merchant account. Some allow sole proprietors to use a personal Social Security number instead. Check with your processor about their requirements. Operating without proper registration can create legal and tax problems later.
What happens if I process a refund?
You issue a refund through your processor, and the money goes back to the customer's card within one to three business days. The processor deducts the refund from your next deposit. You do not pay fees on refunds — the original transaction fee is not charged again.
Do I have to accept all credit cards?
No. You can choose which card types to accept. However, most customers expect you to take Visa and Mastercard at minimum. Declining American Express or Discover is legal but may cost you sales. Most processors bundle all major cards into one rate, so there is no savings in accepting fewer types.