What credit card payments mean for your small business
A credit card payment system lets your customers pay you with their Visa, Mastercard, American Express, or Discover card instead of cash or check. You receive the money in your business bank account, usually within one to three business days. In exchange, you pay a fee — typically between 1.5% and 3.5% of each transaction — to the payment processor who handles the transfer.
For most small businesses, accepting cards is no longer optional. Customers expect it. But the choice of how to accept them — through a point-of-sale terminal, a mobile reader, an online form, or a payment link — depends on where you sell and how much you sell.
Key Takeaways
- Credit card processing fees are a percentage of each sale plus sometimes a flat per-transaction fee, and the rate you pay depends on your industry, sales volume, and the processor you choose.
- You have four main ways to accept cards: in-person terminals, mobile readers, online checkout pages, and payment links sent by email or text.
- Interchange rates — what Visa and Mastercard charge — are set by the card networks and are the same everywhere, but processors add their own markup on top.
- Monthly statements from your processor show every transaction, fee, and deposit, and you should review them to catch errors or unexpected charges.
- PCI compliance means your payment system must meet security standards set by the card networks, and using a certified processor handles most of this for you.
The three parts of every credit card fee
Interchange is the fee Visa, Mastercard, American Express, and Discover charge your processor when a customer swipes or taps their card. This rate varies by card type (a rewards card costs more than a basic card) and by your industry (restaurants pay more than retail). You cannot negotiate interchange — it is set by the card networks. For most small businesses, interchange runs 1% to 2% of the sale.
Assessment fees are a smaller charge the card networks themselves take, usually 0.1% to 0.3% of the sale. Like interchange, these are fixed and non-negotiable.
Processor markup is what your payment processor (Square, Stripe, PayPal, your bank, or another company) adds on top. This is where you have room to negotiate. A processor might charge 0.5% to 1.5% markup, or they might charge a flat fee per transaction (25 cents to 50 cents) instead of a percentage, or both. Some processors also charge monthly fees for statements, PCI compliance, or access to their software.
When a processor advertises "2.9% + 30 cents," they are usually quoting interchange plus their markup and flat fee combined. The exact amount you pay on any single transaction depends on which card was used and what type of sale it was.
Four ways to accept credit cards
In-person terminals are physical machines you keep at your register or counter. A customer inserts, swaps, or taps their card, and the terminal reads it. These work offline if your internet goes down, and they are the standard for retail stores, restaurants, and service businesses. Terminals cost $100 to $500 upfront or can be rented for $20 to $50 per month. Square, Clover, Toast, and most banks offer them.
Mobile card readers are small devices that plug into your phone or tablet and let you accept cards anywhere — at a customer's home, at a pop-up market, or outside your storefront. They cost $20 to $100 and work with Square Reader, PayPal Here, or Stripe Reader. Processing fees are usually the same as a terminal, but you depend on cellular or WiFi connection.
Online checkout pages let customers enter their card details on your website. You do not handle the card number directly — the payment processor collects it in an encrypted form. This is the standard for e-commerce. Shopify, WooCommerce, BigCommerce, and standalone processors all offer this. Fees are usually 2.2% to 3.5% plus 30 cents per transaction.
Payment links are URLs or QR codes you send to a customer by email, text, or social media. The customer clicks the link, enters their card details, and pays. This works for invoices, donations, or one-off sales. Square, Stripe, PayPal, and most processors offer this feature, often at no extra cost beyond standard processing fees.
How to choose a payment processor
Start by listing what you need: Do you sell in person, online, or both? Do you need a physical terminal or will a mobile reader work? How many transactions per month do you expect? Do you want to track inventory or employee sales? The answers narrow your options quickly.
Then compare processors on three things: total cost, features, and support. Total cost means adding up interchange (which is the same everywhere) plus the processor's markup, flat fees, and any monthly charges. A processor charging 2.5% + 25 cents is cheaper than one charging 2.9% + 30 cents if you process $10,000 per month, but the math flips if you only process $500 per month.
Features matter if you need them. Square and Clover offer built-in inventory tracking and employee management. Stripe is built for developers and integrates deeply with custom software. PayPal is straightforward and familiar. Your bank may offer processing, often at a higher rate but with the convenience of one relationship. Shopify, WooCommerce, and BigCommerce bundle payment processing with website hosting.
Support means: Can you reach someone by phone if something breaks? Do they have a help center? How long does it take to get money into your account? Read recent reviews on Trustpilot or the Better Business Bureau, not just the processor's own website.
Understanding your monthly statement
Your processor sends you a statement each month showing every transaction, every fee, and every deposit to your bank account. Learn to read it. The statement breaks down fees by category: interchange, assessment, and processor markup. It shows which transactions were flagged as risky or declined. It shows chargebacks — when a customer disputes a charge and the card network reverses it.
Check your statement against your own records. If a transaction amount does not match your receipt, contact the processor. If you see a monthly fee you did not authorize, ask about it. If your deposit is smaller than you expected, the statement explains why — fees, chargebacks, or refunds you issued.
Over time, your statement tells you which payment methods your customers use most (cards versus mobile wallets, for example) and which transactions are most likely to be disputed. This information helps you spot fraud or customer service problems.
PCI compliance and payment security
PCI compliance means your payment system meets security standards set by Visa, Mastercard, American Express, and Discover. The goal is to keep customer card data from being stolen. If you use a certified payment processor — Square, Stripe, PayPal, Clover, or your bank — the processor handles most of the compliance for you. You do not store card numbers on your own computer or phone.
What you do need to do: use a strong password for your processor account, never write down card numbers, and do not email card details. If a customer gives you their card number by phone, read it back to confirm, then delete it from your notes. If you use a terminal or reader, keep it physically find and update its software when the processor releases updates.
If a customer's card data is stolen from your business, you could face fines, lawsuits, and damage to your reputation. Using a certified processor and following basic security habits protects you and your customers.
Chargebacks and disputes
A chargeback happens when a customer tells their card issuer that they did not make a purchase or did not receive what they paid for. The card issuer reverses the charge, and the money goes back to the customer. You lose the sale and pay a chargeback fee, usually $15 to $100.
To reduce chargebacks, keep clear records: receipts, invoices, delivery confirmations, and customer emails. If a customer disputes a charge, respond quickly with proof that the transaction was legitimate. For online sales, use address verification (AVS) and the three-digit security code (CVV) to confirm the cardholder is real. For in-person sales, ask for ID if the signature does not match or the card is unsigned.
Some chargebacks are fraud — a stolen card or a scammer. Others are honest mistakes — a customer forgot they made the purchase, or they did not receive a service. Either way, your processor will ask you to provide evidence. If you can prove the customer authorized the charge and received what they paid for, the processor may reverse the chargeback in your favor.
Frequently Asked Questions
Do I have to accept credit cards?
No law requires you to accept credit cards. You can accept cash only if you choose. But most customers expect card payment, and refusing it costs you sales. Many small businesses find that the fee is worth the revenue they gain.
What is the difference between a flat rate and interchange-plus pricing?
Flat rate means the processor charges the same percentage on every transaction, regardless of card type or industry. Interchange-plus means you pay the actual interchange rate (which varies) plus the processor's markup. Flat rate is simpler to understand but usually costs more if you process high volume. Interchange-plus is cheaper at high volume but requires you to read your statement to know what you are paying.
Can I negotiate my processing fees?
You can negotiate the processor's markup and flat fees, but not interchange or assessment fees — those are set by the card networks. If you process more than $50,000 per month, processors may offer better rates. Even at lower volume, it is worth asking if they can reduce their markup or waive monthly fees.
What happens if my payment processor goes out of business?
Your money in the processor's account is yours, and you can move to a new processor. The transition takes a few days, and you may lose access to historical data if the processor shuts down suddenly. This is rare, but it is one reason to choose an established processor with good reviews rather than a brand-new startup.
Do I need a separate business bank account to accept credit cards?
No, but it is a good idea. Deposits from your processor go to whatever bank account you provide. Keeping business and personal money separate makes accounting easier and protects you legally if something goes wrong.