Small Business Payment Processing: A Guide (2026)

Learn about payment processing for small businesses, how it works, and how to select the right payment system for your needs, as well as compare top providers.

Payment processing is the system that moves money from a customer’s payment method, such as a credit card, debit card, digital wallet, or bank transfer, into a small business’s bank account. Every noncash transaction runs through it.

Noncash payment processing is growing as US ecommerce sales reached 16.4% of total retail sales in 2025, totaling $1.23 trillion. Consumers now average 11 mobile payments per month—nearly triple the rate from 2018. A payment processor helps a small business accept all of these transactions.

This guide covers how payment processing works, the payment options your customers expect, what to look for in a payment processor, and eight payment processing providers for small businesses.

What is payment processing for small businesses?

Payment processing is the system that moves payments for goods and services between bank accounts, from a customer’s debit card or credit card account to a business’s merchant account. Small businesses need a payment processor to accept card payments, digital wallets like Apple Pay, Google Pay, and Shop Pay, and online payment methods like ACH transfers.

Payment processing fees for small businesses range from 1.5% to 3.5% per transaction. The exact cost depends on the provider, the pricing model, and the payment method a customer uses. Flat-rate providers like Shopify Payments charge between 2.5% and 2.9% plus 30¢ for online transactions, with no additional monthly fees beyond a monthly subscription.

How customers pay is shifting. Credit cards now account for 35% of all US consumer payments, debit cards 30%, and cash just 14%. The Worldpay report goes further: 67% of all US consumer spending (across ecommerce and point of sale) flows directly through credit, debit, and prepaid cards.

A payment processor acts as an intermediary between a customer and their bank or credit card company on one side and a business on the other. It’s one of the core merchant services tools that allow businesses to accept noncash payments.

Components of payment processing

To accept noncash payments, small businesses need to understand three key components of a payment processing system:

Payment gateway

A payment gateway receives customers’ payment details, authenticates them, encrypts the data, and sends it along to the payment processor. Payment gateways vary in which payment methods they accept, including credit and debit cards, digital wallets, and contactless payment methods like Tap to Pay.

Many payment systems function as both payment gateways and payment processors. Payment gateways can include different customer interfaces, including POS systems, ecommerce checkout pages, and payment APIs.

Strong customer authentication features help protect against fraudulent transactions. Tools like 3D Secure are common across major payment gateways. The encryption process keeps customers’ payment information safe from hackers during the transfer to the payment processor.

Payment processor

The payment processor communicates with the customer’s bank and initiates the transfer of funds between the customer’s bank and a business’s merchant account.

Like payment gateways, payment processors help keep payment information safe. They adhere to PCI DSS (Payment Card Industry Data Security Standard), a set of rules from major credit card companies designed to keep customer data secure.

Some payment processors store customer payment details to enable faster repeat purchases (often called one-click checkout).

Merchant account

A customer’s bank won’t transfer funds directly to a business’s bank account. Instead, funds go to a merchant account, which is the necessary bridge between the card issuer and a business bank account. Funds are held in the merchant account for a few days before they’re available for transfer to the main business bank account.

There are two options: a dedicated merchant account for a single business (which involves a longer setup process) or an aggregate merchant account shared with other businesses. Payment service providers like Shopify Payments bundle an aggregate merchant account with a payment processor and gateway in a single setup.

How payment processing works

Payment processors go through a few steps to move a customer’s funds into a business’s bank account, a process that takes one to four business days:

1. Customer payment

The customer enters their payment information into a payment gateway—either a physical point-of-sale (POS) system or an online checkout page. The payment gateway receives, authenticates, encrypts, and sends the customer’s payment data to the payment processor.

2. Authorization

The payment processor forwards the payment information to the customer’s card-issuing bank. The bank verifies that the customer has the funds available, then notifies the payment processor that the payment is authorized or declined.

3. Settlement and transfer

Once authorized, the payment processor settles the transaction by transferring funds from the customer’s bank to the business’s merchant account. From there, the funds move into the standard business bank account, where they become available for withdrawal and contribute to the business’s cash flow.

Payment methods to accept

Customers expect online payment methods depending on how and where they shop. Around 10% of shoppersabandon their carts because there aren’t enough payment methods, so giving multiple options can help convert more customers.

Credit and debit cards

Credit and debit cards are the payment methods most US customers reach for first.Credit card processing fees vary by provider and pricing model, but most fall in the 1.5% to 3.5% range. In-person credit card transactions carry lower credit card fees than online transactions because the physical card’s presence reduces fraud risk.

Digital wallets and mobile payments

Digital wallets—including Apple Pay, Google Pay, Samsung Pay, and Shop Pay—let customers pay using stored card or bank information on their phones. Digital wallets’ share of US in-store spending has grown eightfold over the past decade, from 2% to 16%.

In 2026, the New York City Metropolitan Transit Authority (MTA) retired their famous MetroCard. As of April, 97.5% of riders on NYC trains or buses pay fares with contactless methods, such as NFC-enabled credit cards or digital wallet apps on phones or smartwatches. 

Contactless payment support eliminates the need for extra hardware. 

“I love that I can access Shopify POS anywhere and process payments right at clients’ homes without worrying about paying extra fees,” says Sat Gurumukh Khalsa, owner of Sukhmani Designs.

Buy now, pay later (BNPL)

Buy now, pay later services let customers split purchases into interest-free installments. Global BNPL online spending has grown from $2.2 billion to $342 billion over the past decade. BNPL companies handle the credit risk and pay the business upfront; the customer repays the provider over time.

Some merchants report higher average order values (AOVs) after adding a BNPL option to their store. 

“Shop Pay Installments offered our customers a reliable way to upgrade confidently. As soon as we launched them, our AOV jumped 10%,” says Sean Reyes, founder and CEO at Shock Surplus.

ACH and bank transfers

ACH payments move funds directly between bank accounts and are common for recurring payments, B2B transactions, and large purchases. ACH transfers carry lower fees than credit card transactions—often a flat fee or small percentage—but take one to three business days to settle. ACH debits,ACH credits,ACH deposits, and echecks each serve different use cases, from payroll to customer billing.

Types of payment processors

There are two types of payment processors: payment service providers (PSPs) and merchant account providers. Their main differentiator is how they manage merchant accounts.

Payment service providers (PSPs)

PSPs send funds to an aggregate merchant account—a merchant account shared with other businesses. PSPs offer fast onboarding and flat-rate transaction fees, making them a common starting point for small businesses. Many offer free or entry-level plans with no monthly subscription.

Shopify store owners can turn on Shopify Payments (a PSP) and start accepting payments the same day. Shopify Payments includes a payment gateway, payment processor, and merchant account in one payment solution, with no additional monthly fees beyond the Shopify subscription.

Merchant account providers

Merchant account providers give a business an independent merchant account, but approval requires underwriting—assessing the business’s risk profile. Expect to provide details like average transaction value and shipping speeds.

Onboarding with a merchant account provider takes longer, but interchange-plus pricing can be less expensive than a PSP for businesses with high sales volumes. The tradeoff is complexity: more paperwork, longer setup, and sometimes minimum processing requirements.

What to consider when choosing payment processing for small businesses

• Transaction fees
• Chargeback fees
• Foreign transaction fees
• Pricing structures and hidden costs
• Supplementary services and integrations

Consider fees, pricing structures, features, and integrations when evaluating payment platforms for a small business.

Transaction fees

Transaction fees vary by payment processor and payment method. Credit card processing fees are higher than debit card or ACH payment fees. Consider which payment types customers use most and select a payment processor with competitive rates for those methods. 

“We used to celebrate if we could save three or four basis points with a new credit card processor. We’re saving 30 basis points with Shopify, which is unheard of,” says Peter Schwarzbach, owner of Vin Chicago.

Where payments happen matters too. Payment processors charge different transaction fees for in-person and online transactions. Some offer lower fees for in-person card payments but higher transaction fees for online sales and vice versa. US ecommerce sales in 2025 accounted for 16.4% of total retail sales—a number that continues to grow. Online processing costs are a larger factor for businesses with significant ecommerce sales.

Chargeback fees

Chargeback fees vary by processor. A chargeback happens when a customer disputes a transaction, and payment service providers charge a fee to investigate it.

According to a 2025 report from Mastercard, more than 324 million annual chargebacks are expected by 2028. In chargeback fraud (sometimes called friendly fraud), customers seek refunds for products they’ve received by disputing the charges with their credit card companies.

“I used to have an agent, and almost her whole job was fraud. Now she doesn’t have to deal with that anymore,” says Julian Klenda, CEO of Maine Lobster Now. Built-in fraud detection can flag suspicious orders before they result in chargebacks.

Foreign transaction fees

Payment processors charge different fees on cross-border transactions. Foreign transaction fees typically range from 1% to 3% on top of standard processing fees. For a business processing $100,000 in monthly cross-border volume, the difference between a 1% and 3% fee adds up to $2,000 a month.

Shopify Payments processes payments in customers’ local currencies and charges a currency conversion fee of 1.5% in the US.

Pricing structures and hidden costs

The most cost-effective pricing model depends on average transaction value and sales volume. There are two common structures:

• Fixed-rate pricing. Charges a flat fee for each payment—for example, 2.9% plus 30¢. This model works well for small businesses with low to moderate transaction volumes and makes processing costs predictable.
• Interchange-plus pricing. Includes the interchange rate (set by the card network, around 2% average) plus a per-transaction markup. This model can offer lower per-transaction fees for businesses with high sales volumes, but it often includes an additional subscription fee.

The right model depends on monthly sales volume and anticipated processing costs. Subscription savings from lower transaction fees should outweigh the monthly fee. Hidden costs may include PCI compliance fees, batch processing fees, or statement fees.

Some payment processing companies lock businesses into long-term contracts and charge termination fees. For in-person businesses, factor in the cost of POS equipment, as some providers offer rental options rather than requiring an upfront purchase. Some processors require long-term contracts with termination fees, while others operate month-to-month.

Supplementary services and integrations

An online business needs an ecommerce payment gateway. Some payment processors, such as Shopify Payments, include it and process payments from all over the country. If a processor doesn’t offer an integrated payment gateway, expect additional fees.

In-person businesses need POS hardware. If a POS system is already in place, choose a payment processor that connects to existing hardware. Depending on the business type, look for industry-specific features like inventory management or shift scheduling.

Payment systems often connect with accounting software, shipping platforms, QR code payment options, and marketing tools. Integrated systems consolidate gateway, POS, and back-office tools under one provider; standalone tools may offer more flexibility but require more integration work.

Best payment processors for small businesses

Provider	Transaction fees	Pricing structure	Monthly fees	G2 rating	Best for
Shopify	2.5%–2.9% + 30¢ online; 2.4%–2.6% + 10¢ in person	Fixed rate	Included with Shopify subscription	4.4	Ecommerce businesses
Square	2.9%–3.3% + 30¢ online; 2.4%–2.6% + 15¢ in person	Fixed rate	$0–$149	4.5	Service businesses
Stax	Interchange rate + fixed cost upon request	Interchange plus	Starts at $99/month	4.9	High sales volume
Stripe	2.9% + 30¢ online; 2.7% + 5¢ in person	Fixed rate	None	4.4	Online-only businesses
Payment Depot	Interchange rate + 0.2%–1.95%	Interchange plus	None	4.5	Larger small businesses
Helcim	2.08% + 8¢ average	Interchange plus	None	3.9	Businesses intending to scale
Clover	2.3%–2.6% + 10¢ in person; 3.5% + 10¢ keyed-in	Fixed rate	Varies by hardware	3.9	Restaurants
PayPal	2.29% + 9¢ in person; 2.99% + 49¢ online	Fixed rate	None	4.4	Familiar checkout option for customers

1. Shopify

Shopify Payments is Shopify’s built-in payment gateway and payment processor, available to all Shopify store owners at no additional monthly cost. It accepts all major payment methods—credit and debit cards, digital wallets, Shop Pay, Apple Pay, Google Pay, and stablecoins.

Shopify Payments has 3D Secure checkout, data encryption, 24/7 customer support, and PCI compliance to protect sensitive financial data. POS hardware for in-person selling has inventory management, customer management, and analytics built in. It processes international payments in customers’ local currencies.

Shop Pay converts up to 50% better than guest checkout, and Tap to Pay enables contactless in-person payments without extra hardware. Shop Pay Installments offers BNPL functionality within the Shopify ecosystem.

If your small business needs geographic flexibility, consider mobile checkout. Whether using a device such as a smart phone or tablet, a portable POS system allows you to accept NFC mobile payments anywhere in the store or sell at events like craft fairs, art shows, or farmers markets.

Shopify Payments is a PSP with fixed-rate pricing with no additional monthly fees beyond a Shopify subscription. 

“When you’re not having to put in your email address, you’re not having to re-input your shipping address, the impact that has across conversion when you’re processing hundreds of thousands of transactions a year is really meaningful,” says Curtis Ulrich, director of ecommerce at Aviator Nation.

Pricing: Transaction fees vary by Shopify plan.

• Basic: 2.9% plus 30¢ online; 2.6% plus 10¢ in person
• Grow: 2.7% plus 30¢ online; 2.5% plus 10¢ in person
• Advanced: 2.5% plus 30¢ online; 2.4% plus 10¢ in person

Best for: Ecommerce businesses and omnichannel retailers looking for an integrated payment processing system with no additional monthly fees, fraud protection, and a conversion-optimized checkout.

2. Square

Square is a flat-rate payment processor with three plan tiers: Free, Plus ($49 per month), and Premium ($149 per month). It has POS hardware options ranging from a free magstripe reader to a $799 register, and accepts all major card brands at the same rate.

Pricing: 3.3% plus 30¢ online on the Free plan; 2.9% plus 30¢ on Plus and Premium. In-person rates range from 2.4% plus 15¢ (Premium) to 2.6% plus 15¢ (Free). Square processes payments in the local currency of the account’s country.

For: Service-based and in-person businesses that want fixed-fee pricing with hardware flexibility.

3. Stax

Stax uses interchange-plus pricing with a monthly subscription instead of a percentage markup. It charges the interchange rate plus a flat 8¢ to 15¢ per transaction, depending on payment method. Subscriptions start at $99 per month for businesses processing up to $150,000 annually.

Pricing: Interchange plus 8¢ to 15¢ per transaction. Subscriptions range from $99 to $199 and up per month based on annual processing volume. Stax accepts payments in US and Canadian dollars.

For: Businesses with high sales volumes and high average order values that can offset the monthly subscription with lower per-transaction costs.

4. Stripe

Stripe is a payment processor and gateway with API options for custom checkout builds. It accepts payments in more than 135 currencies and has volume discounts for high-volume sellers.

Pricing: 2.9% plus 30¢ online; 2.7% plus 5¢ in person. No monthly fees. Custom pricing for high-volume businesses.

For: Online businesses not on Shopify that want developer-friendly payment processing software with API flexibility.

5. Payment Depot

Payment Depot, owned by Stax, uses interchange-plus pricing without monthly subscription fees. Rates range from 0.2% to 1.95% on top of the interchange rate—customized after a consultation with the sales team. Payment Depot only works with US-based card networks.

Pricing: Interchange rate plus 0.2% to 1.95%. No monthly fees. Requires a sales consultation for custom rates.

For: Larger small businesses with high processing volumes that want interchange-plus pricing without a monthly subscription.

6. Helcim

Helcim uses interchange-plus pricing with no monthly fees. Transaction rates decrease as sales volume and average transaction value increase, offering built-in volume discounts. Helcim also has a $500 buyout for businesses locked into contracts with other payment processing providers.

Pricing: For a $50 average transaction value and $20,000 in monthly sales, expect an average rate of 2.08% plus 8¢. Accepts US and Canadian dollars.

For: Growing businesses that want interchange-plus pricing that scales down as volume increases.

7. Clover

Clover is a cloud-based POS system and payment processor offered through its parent company, Fiserv. It provides industry-specific plans for restaurants, retail, and service-based businesses, with features like inventory management, shift scheduling, and self-service kiosks.

Pricing: 2.3% to 2.6% plus 10¢ for in-person transactions (varies by business type); 3.5% plus 10¢ for keyed-in transactions. Discount pricing available on longer contracts.

For: Restaurants and service businesses that need specialized POS features and are willing to commit to hardware rental agreements.

8. PayPal

PayPal started as a consumer-to-consumer payment service and also processes payments for businesses. It offers card readers and terminals for in-person sales and competitive in-person transaction fees. Online PayPal fees are higher than several competitors listed above.

Pricing: 2.29% plus 9¢ in person; 2.99% +plus 49¢ online. Supports 25 currencies.

For: Businesses that want to offer a familiar, trusted checkout option alongside their primary payment processor.

Payment processing tips for small businesses

Protect yourself from fraud

Fraud prevention affects both revenue and customer trust. According to a LexisNexis study, US merchants incur an average cost of $4.61 for every $1 of fraud. And 41% of North American merchants still depend on manual processes to prevent fraud, leaving gaps that automated tools can close.

Ensure a secure checkout by choosing a PCI-compliant payment processor with built-in fraud detection. Keep POS systems updated. Opt for a payment gateway with address verification services (AVS) to match payment information to billing addresses. Enable two-step authentication and monitor business accounts for suspicious activity.

Providers offering 3D Secure and payment tokenization add an additional layer of payment security. “We haven’t had one chargeback out of 700 orders in the last two months. I think Shopify’s fraud notification system does a much better job screening ahead of time,” says Ward Bates, owner at Winter Park Cycles.

Offer multiple payment options

Every customer has a preferred payment method. Adults aged 18 to 24 used their phones for 45% of all payments, but older cohorts still rely heavily on credit and debit cards or cash. Offering payment options beyond credit and debit cards may reduce checkout friction for some customers.

“Checkout is a game, and friction is the enemy. Anything we can do to eliminate that friction helps us win,” says David Cost, VP of digital and ecommerce at Rainbow Shops. Shopify Payments lets customers pay with credit and debit cards, PayPal, Venmo, Apple Pay, Google Pay, and Shop Pay.

Use customer data

A payment processor provides data on customers’ preferred payment methods, peak shopping times, and spending patterns. This data can inform decisions about payment method offerings, checkout design, and marketing.

A/B testing during checkout—testing different payment options, button placements, or promotional offers—turns transaction details into actionable insights. Shopify’s Net payments by method report breaks down completed transactions by payment type. Pair it with the Conversion rate report to spot how checkout changes affect overall conversions and revenue.

Payment processing for small business FAQ

What is the best way to process payments for a small business?

Payment service providers (PSPs) typically offer the fastest setup. Examples include Shopify Payments, Stripe, Square, and PayPal. Shopify Payments is a PSP that accepts all major payment methods—credit cards, debit cards, digital wallets, and buy now, pay later—with flat-rate pricing and fraud protection.

How much does payment processing cost for a small business?

Payment processing fees for a small business range from 1.5% to 3.5% per transaction, plus a fixed per-transaction charge. Shopify Payments, for example, charges 2.5% to 2.9% plus 30¢ for online payments. Some processors also charge monthly subscription fees, chargeback fees, or PCI compliance fees.

How can small businesses take payments online?

Small businesses take payments online using a payment processor with a built-in payment gateway. Providers like Shopify Payments let businesses accept debit cards, credit cards, ACH transfers, and digital wallets like Apple Pay, Google Pay, and Shop Pay.

How does a small business accept credit card payments?

To accept credit card payments, a small business needs a payment processor, a payment gateway, and a merchant account. Many PSPs, including Shopify Payments, Stripe, and Square, bundle all three, letting businesses accept credit card transactions online and in person with POS hardware.

What is the cheapest way to process payments?

The cheapest way to process payments depends on a business’s sales volume and average order value. For low-volume businesses, flat-rate pricing—like Shopify’s Basic plan that includes Shopify Payments—offers cost predictability. For high-volume businesses, interchange-plus pricing from a provider like Helcim or Payment Depot can result in lower per-transaction fees, but may require a higher overall commitment.