Getting paid should be one of the easiest parts of running a business. After all, you already did the hard part by finding customers and getting them to buy. But with so many credit card processing companies, pricing models, and payment features to compare, finding the right solution for your small business isn’t always straightforward.
The best provider does more than process transactions. It helps you accept payments wherever your customers shop, keeps costs predictable, protects sensitive payment data, and integrates with the tools you already use.
This guide breaks down how small business credit card processing works, what it costs, and what to look for when choosing a provider.
What is credit card processing for small businesses?
Credit card processing for small business is the system that lets you securely accept credit card payments, whether customers are shopping in person or online.
Every transaction passes through several parties that work together to approve the payment and transfer funds to your business:
- The payment processor securely routes the transaction, and the payment gateway transmits payment information for online purchases
- The merchant account holds the funds
- The acquiring bank deposits the money into your business bank account
How small business credit card processing works
Whether a customer taps a card at your checkout counter or enters their payment information on your website, the transaction moves through the same basic process. It all happens in a matter of seconds, but several systems work together behind the scenes to verify the payment and move the money into your account.
Customer initiates a card payment
The process begins when a customer chooses to pay with a credit or debit card. Depending on how you do business, this could happen through a point-of-sale (POS) system, a credit card terminal, an ecommerce checkout, a payment link, or another online payment method. Many businesses also accept mobile payments through digital wallets like Apple Pay and Google Pay, giving customers more flexibility at checkout.
Once the customer submits their payment, the transaction is encrypted before it leaves the device or checkout page.
Payment information is securely transmitted
Next, the payment information travels through a payment gateway, which securely sends the transaction to your payment processor. The gateway acts as the bridge between your checkout experience and the financial institutions involved in the transaction.
During this step, sensitive customer data and transaction data are protected using encryption, tokenization, and other security features. Businesses that accept card payments should also follow PCI DSS requirements, which establish industry standards for handling payment information and reducing the risk of fraud.
The transaction is approved
Your payment processor forwards the authorization request through the appropriate credit card network, such as Visa or Mastercard, to the customer’s issuing bank. The bank checks several factors before making a decision, including whether the account is valid, whether sufficient funds or available credit exist, and whether the transaction appears legitimate.
If everything checks out, the bank sends back an approval code and the sale is completed. If the transaction is declined, the customer is prompted to use another payment method.
Funds are deposited into your bank account
Once the transaction is approved, the payment enters the clearing and settlement process. The funds are typically placed in your merchant account before being transferred to your business bank account, usually within one to three business days, although timing varies by provider.
The speed of settlement can have a direct impact on cash flow, especially for small businesses that rely on consistent access to working capital. Many credit card processing providers also offer reporting tools that make it easier to track deposits, reconcile transactions, and monitor payment activity from a single dashboard.
What features should small businesses look for in a credit card processor?
Now that you know the basics, let’s talk about a critical player in small business payments: the credit card processor.
The best credit card processor isn’t necessarily the one with the lowest advertised rate. It should fit the way you run your business today while giving you room to grow. As you compare providers, look beyond the headline pricing and consider how each solution handles payments, security, integrations, and support.
Transparent pricing
Payment processing costs can vary widely, so you need to understand exactly what you’re paying for. Look for providers that clearly explain their pricing models, including interchange-plus or flat-rate pricing, and provide a straightforward breakdown of processing fees. The fewer surprises on your monthly statement, the easier it is to forecast costs and protect your margins.
Competitive credit card processing fees
A low processing rate doesn’t always mean lower overall costs. Compare the full fee structure, including transaction fees, monthly fees, statement fees, setup fees, and cancellation fees. Some providers advertise attractive introductory rates but make up the difference with additional charges. Understanding the total cost of accepting payments will help you make a more informed decision.
Flexible payment options
Customers expect to pay however they prefer. Choose a processor that lets you accept credit cards in person, online, and on the go. Support for online payments, payment links, recurring payments, mobile payments, and digital wallets gives customers more ways to complete a purchase and can help improve conversion rates. The more payment methods you offer, the easier it is to serve different types of customers.
Easy software integrations
Your payment processor should work seamlessly with the tools you already use. Look for integrations with your point-of-sale system, ecommerce platform, accounting software, CRM, and other business management software. When your payment data flows automatically between business systems, you’ll spend less time on manual reconciliation and have better visibility into your operations.
Security and fraud prevention
Protecting customer payment information should be a top priority. Choose a provider that supports PCI Data Security Standards and includes built-in fraud prevention tools such as tokenization, encryption, address verification, and real-time fraud monitoring. Advanced security features can help reduce risk while giving customers confidence that their information is protected.
Responsive customer support
Even reliable payment systems occasionally run into issues. When they do, you want fast, knowledgeable support. Look for a provider with multiple support channels, quick response times, and, if available, a dedicated account manager who understands your business. Poor customer support can turn a minor payment issue into hours of lost sales and frustrated customers.
Understanding credit card processing fees for small businesses
Every time you accept a card payment in your small business, a small percentage of the sale goes toward processing the transaction. Those processing fees aren’t collected by a single company. Instead, they’re split among the different organizations that make the payment possible. Understanding where those costs come from can help you compare providers more accurately and avoid paying more than necessary.
Interchange fees
Interchange fees are the largest part of most credit card processing costs. They’re paid to the customer’s card-issuing bank to cover the cost and risk of approving the transaction. These fees are set by the card networks and vary based on factors like the card type, payment method, industry, and whether the purchase is made in person or online. Your payment processor doesn’t control interchange rates.
Assessment fees
Assessment fees are charged by the card networks, such as Visa and Mastercard. These fees help fund the payment networks that route transactions between banks and processors. While assessment fees are typically much smaller than interchange fees, they’re included in nearly every credit card transaction.
Processor markup
This is the portion your credit card processor charges for its services. Depending on the provider and pricing model, the markup may be a percentage of each sale, a flat fee per transaction, or a combination of both. Some providers also bundle their markup into a flat-rate price, while others use interchange-plus pricing, which separates the processor’s fee from the underlying interchange and assessment costs.
Monthly costs
In addition to transaction fees, some providers charge recurring monthly fees for account maintenance, reporting tools, payment terminals, or premium features. Before signing up, review your agreement for any monthly fees and ask whether there are additional costs for PCI compliance, chargebacks, or optional services. Looking at the total cost of processing, not just the advertised rate, will give you a much clearer picture of what you’ll actually pay.
Flat-rate vs interchange-plus pricing vs membership pricing vs tiered pricing
Not all credit card processors charge for their services the same way. Understanding the four most common pricing models can help you estimate your costs, compare providers more accurately, and choose an option that fits your sales volume and business goals.
| Pricing model | How it works | Best for |
| Flat-rate pricing | You pay the same rate for every transaction, regardless of the card type or interchange cost. | New or lower-volume businesses that value predictable pricing and simple statements. |
| Interchange-plus pricing | You pay the actual interchange fee plus a fixed markup from your processor. | Businesses that want greater pricing transparency and may process enough volume to benefit from lower overall costs. |
| Membership pricing | You pay the processor’s wholesale interchange cost plus a small per-transaction fee, along with a monthly membership fee instead of a percentage markup. | Businesses with higher processing volumes that want transparent pricing and potentially lower overall costs. |
| Tiered pricing | Transactions are grouped into pricing tiers, such as qualified, mid-qualified, and non-qualified, with each tier carrying a different rate. | Businesses that don’t mind a simpler statement but should review pricing carefully before signing up. |
Flat-rate pricing is easy to understand because every transaction costs the same, making it simple to estimate processing expenses. The tradeoff is that you’ll often pay the same rate whether the underlying interchange cost is low or high.
Interchange-plus pricing separates interchange fees from the processor’s markup, making it easier to see exactly what you’re paying for. Your effective rate may fluctuate from month to month based on the mix of cards your customers use, but the pricing is generally more transparent.
Membership pricing works differently. Rather than adding a percentage markup to every transaction, the processor charges a recurring membership fee and passes through interchange costs while collecting a small fixed fee per transaction. For businesses processing higher monthly volumes, this model can lead to lower overall processing costs.
Tiered pricing groups transactions into categories that determine what you’ll pay. While the pricing may look straightforward at first, it isn’t always clear how transactions are assigned to each tier. Because similar transactions can be charged different rates, this model can make it more difficult to predict costs and compare providers.
No pricing model is right for every business. Consider your monthly processing volume, average transaction size, and how much visibility you want into your processing costs. Looking beyond the advertised rate and estimating your total monthly expense will give you a much clearer picture of which option offers the best value.
Different credit card processing options for small business
The credit card processing companies discussed in this section are some of the leading providers in the industry.
Each has its own unique pricing model, and the right choice for your business will depend on your sales volume and how you want to manage the impact of processing fees on your bottom line.
Stax: Best for small businesses with high sales volumes
Stax is an all-in-one payment processing company that charges a fixed monthly fee (subscription-based membership) for your transactions, instead of charging a percentage of each transaction amount like most payment service providers (PSPs).
The usual practice is that a PSP will charge a markup (usually a percentage of the transaction amount) per transaction in addition to the interchange fees imposed by the issuing bank.
As explained earlier, this markup can be a fixed rate, interchange-plus rate, or a tiered rate. The key thing to know is that the markup is applicable to all transactions.
Stax takes a unique approach. It charges you a fixed fee each month that covers all your transactions for that period plus the direct interchange cost. The advantage of this approach is that it completely eliminates the percentage markup, shielding your business from the anxiety of rising rates and saving large-volume merchants significant money.
Once you cross a certain threshold (about $5,000+) for the month, the monthly membership fee, which stands in for the typical per-transaction fee, will have been exhausted, and you will basically start using Stax’s services free for the rest of the month.
Stax features
- Membership pricing
- Easy integration with your existing POS devices
- Centralized dashboard for managing your payments
- Included payment gateway software and online virtual terminal
- Support for a wide range of payment methods
- API access
- Mobile payments app
- Invoicing
- In-house customer support
- Chargeback protection
- Next business day funding (same-day funding available for a fee)
- PCI-compliant
- No setup fees
- No cancellation fees
- No hidden fees
Stax pricing
- Processing up to $150,000 per year: $99/month
- Processing between $150,000-$250,000 per year: $139/month
- Processing $250,000+ per year: $199+/month.
Payment Depot: Best for custom interchange-plus pricing
Payment Depot uses an interchange-plus pricing model, where it tailors the markup it charges to your business, setting a fixed monthly fee that corresponds to your average sales volume.
That markup is set according to your average sales volume, and it remains consistent regardless of the type of credit card used for each transaction.
By doing this, Payment Depot helps you take advantage of the fact that interchange rates vary depending on the type of credit card used for the transaction.
Since the markup stays the same regardless of the type of sale, you will be able to save money when your customers use credit cards that impose lower interchange fees.
Payment Depot is particularly suited for businesses that have a stable monthly sales volume.
You will be able to save more compared to using other PSP providers that will impose the same markup percentage on businesses of all sizes or charge varying fees depending on the credit card type.
Payment Depot features
- Interchange-plus pricing model
- Fixed processing fee for all types of credit card payments
- Online dashboard to manage payments
- Includes virtual terminal and payment gateway software
- Chargeback protection
- Funding in 24 to 48 hours
- In-house customer support
- PCI-compliant
- No setup fees
- No cancellation fees
- No PCI fees
- No monthly fee
- Only available in the United States
Payment Depot pricing
Interchange-plus rates between 0.2% – 1.95% per transaction.
CardX: Best for reducing fees using credit card surcharging
CardX is a specialized service (part of Stax) that lets you pass on credit card processing fees to customers via surcharging.
A surcharge is an additional fee added to the nominal cost of a good or service for the convenience of paying with a credit card.
CardX imposes a fixed 3% charge, and this fee is only applicable when the customer pays with a credit card.
The main advantage of surcharging is that it encourages your customers to pay with cash instead of a credit card, which is more expensive due to the surcharge.
Your business will also drastically reduce costs associated with credit card payment processing since it’s now mostly borne by the customer.
You will still pay a small amount for each debit card transaction and a monthly fee for the use of CardX’s virtual terminal.
CardX is an industry-leading surcharging solution, and its services are available in all states where surcharging is legally allowed.
Surcharging is not the right approach for every business, and it can turn off customers who may feel you are taking advantage of them.
We recommend surcharging for food and drink, transportation, and ecommerce businesses.
CardX features
- Automated surcharging
- 0% credit card fees*
- Support for credit and debit cards and ACH (eChecks)
- Custom POS terminal and software
- Virtual terminal
- Low monthly equipment lease fee
- Zero equipment setup fee
- Merchant training
- Funding in 24 hours
- In-house customer support
- PCI-compliant
- No long-term contracts
- No cancellation fees
*Where eligible, the credit card discount rate is offset by the surcharge
CardX pricing
- Equipment and software for in-person transactions: starting at $99/month
- Equipment and software for online and in-office transactions: starting at $99/month
Final words
Choosing the right credit card processing solution comes down to understanding your business, your customers, and your costs. Look beyond advertised rates and compare pricing models, payment options, security features, integrations, and support. A provider that aligns with your needs today can help you streamline operations, improve cash flow, and create a better payment experience as your business grows.
