Square Credit Card Processing Explained: Fees, Features, and How It Works

Feb 25,2026
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​Accepting credit card payments has become a necessity for businesses. From retail stores to restaurants, e-commerce shops to service-based companies: every business needs an effective payment processor. Square is one of the most recognized names in the industry. But how does it work, what’s the cost, and is it right for your business?

​In this complete guide, we simplify Square credit card processing and explain when it might be time to search for a custom solution from NDMR Payments.

What Is Square Credit Card Processing?

​Square is a payment processing platform that allows businesses to accept payments from anywhere, in-person or online, and via mobile devices with only a few clicks. It is especially great for small businesses, food trucks, pop-up shops, and retail stores. What sets it apart from a traditional merchant account provider is that there are no long-term contracts or complicated pricing, ensuring transparency throughout the process. 

As such, it is quick and straightforward to set this model up, but there are also limitations that we will explore in subsequent sections.

​How Does Square Credit Card Processing Work?

​Knowing how Square handles payments can help you understand where fees and risks originate.

Step 1: Customer Initiates Payment

The customer taps, inserts, or swipes a credit card or debit card through a mobile wallet like Google Pay or Apple Pay.

​Step 2: Transaction Is Encrypted

Payment information is encrypted and passed securely to Square’s processing system.

Step 3: Authorization Request

Square forwards transaction details to the card network (like Visa or Mastercard) and the customer’s issuing bank for approval.

​Step 4: Funds Are Deposited

Funds are transferred to your linked business bank account, typically within one to two business days, once approved.

Businesses don’t deal with banks directly during setup because it is Square that manages the backend process. This simplicity is a key selling point.

Also Read: How to Choose the Right Payment Processors for Small Business Owners

Square Processing Fees Explained

Square’s flat-rate pricing model is also one of its biggest advantages. You don’t need to pay monthly fees for basic payment processing, and no hidden charges for PCI compliance. Let’s have a look at Square’s standard fees:

  • ​In-Person Payments: 2.6% +$0.10 per transaction
  • Online Payments: 2.9% + $0.30 per transaction
  • Manually Entered Cards: 3.5% + $0.15 per transaction

Flat-rate pricing is clear and predictable. However, please note that there may be separate subscription fees for additional services like payroll, marketing tools, or advanced POS features.

Key Features of Square

Square is an all-in-one ecosystem built for small and growing businesses.

Point-of-Sale (POS) System

Square’s POS system tracks sales, stock, customer information, and employee performance in a single dashboard.

Mobile Card Readers

Small, portable readers that plug into smartphones help businesses accept payments anywhere.

​Online Store and Invoicing

With ease, businesses can develop online stores, send electronic invoices, and accept payments remotely.

​Inventory Management

It allows businesses to track inventory levels in real time, set low stock alerts, and manage product variation effectively.

​Reporting and Analytics

Real-time sales reports, customer insights, and performance tracking are provided by Square.

​Security and Compliance

Square takes care of PCI compliance and uses encryption for secured payments. Hence, businesses don’t need to worry about compliance.

These features make Square ideal for startups and small retail operations that are looking for an integrated solution.

Pros and Cons of Square

​Pros

  • ​Quick and easy setup
  • No long-term contracts
  • Transparent flat-rate pricing
  • Sales and reporting integrated tools
  • Suitable for small businesses

​Cons

  • ​Progressively higher rates for high-volume businesses
  • Shared merchant account structure
  • Risk of priority account holds or spontaneous freezing of funds
  • Limited personalized customer support

Square has a master account model, so businesses can be subject to account reviews or their funding can be delayed if activity looks out of the ordinary. That can frustrate growing companies with varying sales volumes.

​When Square Is Not The Best Fit

​Square works well for most startups and small businesses that do not need a ton of customizations. But that might not be the thing to do for:

  • ​High-volume businesses
  • High-risk industries
  • Businesses with large transaction sizes
  • Businesses that need long-term, stable merchant accounts
  • Owners who want dedicated support

​As your business expands, so do the demands for improved pricing and one-on-one care.

​Square vs Traditional Merchant Accounts

​When choosing a payment processor, many small business owners make the mistake of comparing Square to traditional merchant accounts provided by banks or full-service providers.

​Square has a flat-rate price structure, so you pay the same percentage for most transactions. No long-term contracts, monthly minimums, or complex fee structures. Setup takes a few minutes, and approval is often immediate. Thus, Square is great for startups and small businesses looking for simplicity and flexibility.

​In contrast, traditional merchant accounts typically work with either interchange-plus or tiered pricing. Although more complex, high-volume businesses can find themselves with lower total rates. But they can come with monthly costs, PCI compliance fees, and long-term contracts.

​In short, Square provides a user-friendly experience with no hidden fees, while merchant accounts could provide custom pricing and possible savings on transactions for larger enterprises.

Also Read: Best Payment Processor for Small Business: Top Options Compared

​How to Set Up Square

​Here are the steps to follow:

  1. ​Sign up for a free account on Square’s website
  2. Link your business bank account
  3. Pick the hardware that works for you
  4. Download the POS app and accept payments

There are no long approval processes as with a traditional merchant account, so onboarding is fast and easy.

​Want to upgrade your payment processing? Get in touch with NDMR Payments today to take control of your credit card payment processing. We are here to help.

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