Interchange Plus vs flat-rate processing: which pricing model fits your business?
Flat-rate payment processing can be simple, while Interchange Plus can give business owners more visibility into processor markup and card-cost categories. SecureTrust of Florida helps merchants compare both models using current statement fees, monthly volume, average ticket size, card mix, device needs, and payment workflow.
The right choice depends on the full merchant statement, not one advertised rate.
Serving businesses across Florida, with sales representatives in New York and additional expanding markets.
Flat-rate simplicity
A flat-rate processor usually presents a simple published rate structure, which can be easier to understand for newer, seasonal, mobile, or lower-volume businesses.
Interchange Plus detail
Interchange Plus separates processor markup from other card acceptance costs, which can make the statement easier to evaluate for established or higher-volume merchants.
Statement review matters
The best option depends on card mix, monthly volume, average ticket, keyed transactions, gateway use, account fees, equipment, and support needs.
Quick comparison: Interchange Plus vs flat-rate processing
These are structural differences, not a promise that one model is always cheaper. The actual cost depends on the business statement and approved processor program.
| Category | Flat-rate processing | Interchange Plus |
|---|---|---|
| Pricing structure | A simplified published rate structure, often with different rates for in-person, online, manually entered, or other transaction types. | Processor markup is shown separately from other card acceptance costs and account fees. |
| Statement detail | Easier to read, but detailed card costs and processor markup are usually blended into the published pricing model. | More detailed, which can help merchants review card mix, transaction types, processor markup, and monthly fees. |
| Best reviewed for | Newer, seasonal, mobile, or lower-volume businesses that value simple pricing and easy setup. | Established businesses, higher-volume merchants, larger average tickets, mixed card activity, or businesses that want statement clarity. |
| What can change cost | Published rate category, online vs in-person activity, manually entered cards, international cards, gateway tools, and software costs. | Card mix, interchange categories, assessments, processor markup, transaction method, gateway use, monthly fees, and account-level fees. |
| Main tradeoff | Simple pricing may be easier to understand, but can hide detail that matters as processing volume grows. | More detail can help with analysis, but the statement may be harder to read without a proper review. |
This page is general business information, not legal, tax, or financial advice. Program availability, pricing, underwriting, and requirements can vary by processor, business type, location, card network rules, and account approval.
Published flat-rate examples
Flat-rate processors usually publish simplified pricing. For example, Stripe publicly lists U.S. domestic online card pricing at 2.9% + 30¢ per successful transaction, with added fees for manually entered cards, international cards, and currency conversion. Square publicly lists in-person tap, dip, or swipe pricing at 2.6% + 15¢.
These examples are included only to show how flat-rate pricing is commonly presented. Rates can change, and businesses should verify current pricing directly with the provider before making a decision.
Why flat-rate examples are easy to compare
The published rate is simple to understand, which can make budgeting easier for a new or lower-volume business.
Why flat-rate examples do not tell the whole story
The published rate does not always show how card mix, manually entered transactions, online payments, gateway tools, software costs, or business growth may affect total cost.
How Interchange Plus pricing works
Interchange fees are one component of the total merchant cost. Interchange Plus pricing separates the processor markup from other card acceptance costs and account-level fees, which can make the statement more detailed.
This does not automatically mean Interchange Plus is cheaper. A business still needs to review monthly fees, transaction fees, gateway fees, virtual terminal costs, chargebacks, equipment, and support expectations.
Processor markup visibility
Interchange Plus can make it easier to identify the processor markup compared with a fully blended model.
Card mix matters
Debit, credit, rewards, corporate, keyed, online, and card-present transactions can each affect the final processing cost.
Volume matters
Higher monthly volume can make small differences in processor markup, monthly fees, and transaction fees more important.
Statement review matters
A recent processing statement is the best starting point for comparing flat-rate pricing against Interchange Plus.
For a deeper service overview, review our Interchange Plus merchant services page.
What is a good Interchange Plus rate?
A good Interchange Plus quote depends on the business type, monthly volume, average ticket size, card mix, transaction method, gateway use, equipment needs, support expectations, and account fees.
The processor markup is only one part of the total cost. A business should compare the full statement, including monthly fees, transaction fees, gateway fees, PCI-related fees, batch fees, chargeback fees, equipment costs, and any software or support fees.
When flat-rate may make sense
Flat-rate processing may make sense when the business values simple pricing, has lower or unpredictable monthly volume, wants quick setup, or does not yet have enough processing history for a deeper statement comparison.
New businesses
A new business may prioritize simple pricing and easy setup before processing history is available.
Seasonal or low-volume merchants
Businesses with inconsistent or lower monthly volume may prefer a simplified setup at the beginning.
Mobile or occasional sellers
Some mobile or occasional sellers may value simplicity more than detailed statement structure.
When Interchange Plus may be worth reviewing
Interchange Plus may be worth reviewing when the business has growing monthly volume, larger average tickets, a steady processing history, mixed card activity, multiple payment channels, or a need for clearer statement detail.
Higher-volume businesses
When monthly processing volume grows, small differences in markup and fees can become more important.
Larger average tickets
Higher average tickets can make percentage-based costs more important to review.
Mixed payment channels
Businesses taking in-person, online, keyed, phone, invoice, and gateway payments should review how each channel affects cost.
Businesses with larger monthly volume can also review our high-volume merchant processing page.
What to send for a real comparison
A real comparison should use the business’s actual processing data instead of generic examples. SecureTrust can review the current statement and payment workflow before comparing flat-rate, Interchange Plus, Dual Pricing, Clover POS, gateway, or virtual terminal options.
Related pages: merchant services, pricing programs, Clover POS setup, and Dual Pricing.
Questions business owners ask
Is Interchange Plus always cheaper than flat-rate processing?
No. Interchange Plus is not always cheaper. The better option depends on monthly volume, average ticket size, card mix, processor markup, gateway fees, monthly fees, and how the business accepts payments.
Is flat-rate processing bad?
No. Flat-rate processing can be useful when a business wants simple pricing, especially for newer, seasonal, mobile, or lower-volume businesses. The tradeoff is that detailed card costs and processor markup are usually blended together.
What is a good Interchange Plus rate?
A good Interchange Plus quote depends on business type, monthly volume, average ticket size, card mix, transaction method, gateway use, equipment needs, and account fees. Business owners should compare the full statement instead of judging one percentage alone.
Why does card mix affect pricing?
Different card types and transaction methods can carry different costs. Debit, credit, rewards, corporate, keyed, online, and card-present transactions can each affect the final cost.
Can Interchange Plus work with Clover POS?
Yes. Interchange Plus can be reviewed alongside Clover POS, virtual terminal, payment gateway, and invoicing workflows. The setup should match how the business accepts payments.
What should I send for a comparison?
Send a recent processing statement, monthly volume, average ticket, business type, hardware needs, gateway needs, virtual terminal activity, and any online payment requirements.
Need help comparing Interchange Plus and flat-rate processing?
SecureTrust of Florida can review your current statement and compare program options, equipment needs, gateway tools, virtual terminal activity, and support expectations before you choose a payment-processing setup.