Flat Rate Card Processing: Is it Right for Your Business?
Acex Technologies Inc
March 20, 2025

Choosing the right payment processing model is crucial for businesses that accept credit and debit card transactions. One of the most widely adopted pricing structures is flat-rate card processing. It offers simplicity and predictability, making it an appealing option for many business owners. However, is it the best choice for your business?
This article will explore flat-rate pricing in credit card processing, how it works, and whether it suits your business needs. We’ll also discuss typical fee structures, different types of flat fees, and which businesses benefit most from this model.
What is Flat-Rate Pricing in Credit Card Processing?
Flat-rate pricing is a credit card processing model where merchants pay a fixed percentage fee per transaction, regardless of the card type or issuing bank. Unlike interchange-plus or tiered pricing models, flat-rate pricing keeps costs predictable and easy to understand.
Key Features of Flat-Rate Pricing:
- A fixed percentage on each transaction (e.g., 2.9% + $0.30 per transaction).
- No separate interchange or assessment fees.
- No fluctuating costs based on card type (debit, credit, rewards, business cards, etc.).
- Ideal for small businesses, startups, and merchants with low transaction volumes.
Flat-rate pricing is commonly used by payment service providers (PSPs) such as PayPal, Square, and Stripe. These companies bundle interchange fees, assessment fees, and their own markup into a single, easy-to-understand rate.
How Does a Flat-Rate Program Work?
A flat-rate program charges businesses a predetermined percentage per transaction, often with a small fixed fee. This pricing model simplifies the payment processing experience for businesses by eliminating complex fee structures and monthly statements filled with hidden charges.
Example of Flat-Rate Fees:
- In-person transaction:6% + $0.10 per swipe, dip, or tap.
- Online transaction:9% + $0.30 per transaction.
- Manual entry or keyed-in payment:5% + $0.15 per transaction.
This pricing model provides transparency and ease of use for businesses processing low volumes of online payments or in-store transactions. However, it may not be the most cost-effective solution for high-volume merchants.
Typical Flat Fee Rates for Credit Card Processing
In-Person Flat-Fee Rates
When a customer pays with a card in a physical store, secure payment systems process the transaction at a lower risk level, leading to lower fees. Here are typical in-person rates:
- Square:6% + $0.10 per swipe, tap, or dip.
- PayPal Zettle:29% + $0.09 per transaction.
- Stripe Terminal:7% + $0.05 per transaction.
These rates apply to transactions where the card is physically present, reducing the risk of fraud and chargebacks, thereby lowering payment security risks.
Online Flat-Fee Rates
Online payments involve higher processing risks due to increased fraud potential. As a result, rates tend to be slightly higher:
- PayPal:9% + $0.30 per transaction.
- Stripe:9% + $0.30 per transaction.
- Square:9% + $0.30 per transaction.
For businesses operating in eCommerce, secure payment systems play a crucial role in preventing fraudulent transactions. Payment processors charge higher rates for online payments to offset fraud risks and additional security measures.
Different Types of Flat-Fee Rates
Percentage-Based Flat Rate: The merchant pays a fixed percentage on each sale (e.g., 2.9%).
Flat Fee Per Transaction: A set dollar amount is charged per transaction (e.g., $0.30 per transaction).
Hybrid Flat-Rate Model: A mix of percentage and per-transaction fees (e.g., 2.6% + $0.10 for in-person and 2.9% + $0.30 for online payments).
Who Benefits from Flat Fee Credit Card Processing? H2
New Businesses
Startups and new businesses often opt for flat-rate payment processing because:
- No complicated fee structures.
- Easy to predict monthly costs.
- No need for interchange rate negotiations.
Low-Volume Merchants
Businesses with low transaction volumes benefit from flat-rate pricing as they:
- Avoid interchange-plus pricing complexity.
- Experience fewer fluctuations in processing costs.
- Do not have to commit to long-term contracts.
Merchants Prioritizing Convenience
For business owners who prefer simplicity over cost savings, flat-rate pricing provides:
- Transparent, hassle-free billing.
- No surprise charges or fluctuating monthly fees.
- Integrated secure payment systems with fraud protection.
Payment Service Providers (PSPs)
PSPs like Square, Stripe, and PayPal use flat-rate pricing to offer seamless transactions for:
- Freelancers and independent contractors.
- Small businesses with occasional sales.
- Businesses need payment security without complex merchant account setups.
Pros and Cons of Flat-Rate Pricing
Pros:
- Simple, transparent pricing model.
- No hidden fees or complicated structures.
- Ideal for startups and small businesses.
- Bundled payment security features included.
Cons:
- More expensive for high-volume businesses.
- It is not suitable for enterprises with large transactions.
- Less flexibility in fee negotiations.
Is Flat-Rate Processing the Best Choice for You? h2
Before choosing flat-rate payment processing, consider these factors:
Monthly transaction volume: An interchange-plus model might be more cost-effective if your business processes thousands of dollars monthly.
Transaction type: If you process more online payments, expect slightly higher fees due to payment security concerns.
Convenience vs. cost savings: Flat-rate pricing is ideal for businesses seeking simplicity, but those prioritizing lower fees may explore other models.
Conclusion
Flat-rate pricing is very easy to process payments with, making it a good option for most businesses. If your business places a high value on secure payment systems, predictable fees, and ease of use, this could be a great fit. For high-volume merchants, though, exploring interchange-plus pricing may provide more savings.
According to size, transaction volume, and need for payment security in every transaction, the best payment processing choice will depend on your business.