What Is Dual Pricing and How Is It Different from Cash Discount?
Fri Oct 16 2026
A boutique owner pulls up her monthly statement and finds a quoted rate of 2.6% and an actual cost closer to 3%. The gap is not an error, because several different fees get blended into one number.
Interchange plus pricing pulls them apart so you can see each one.
Quick Answer: Interchange plus pricing means you pay the card network's actual cost for each transaction (interchange and assessments) plus a fixed markup that goes to your processing partner. Because the markup is the only part you negotiate, it is the most itemized pricing model, and it often costs less for merchants with steady volume and a mix of debit and credit cards. Rates vary by merchant category, card type, and processing volume, so the figures below are illustrative estimates.
What Is Interchange Plus Pricing?
Interchange plus pricing splits every card transaction into three parts: interchange, assessments, and a markup. You see each one on your statement instead of a single blended percentage.
Interchange: The fee set by the card networks and paid to the bank that issued the customer's card. It changes by card type, such as debit, standard credit, or premium rewards credit, and by how the card is accepted.
Assessments: A small fee charged by the card networks themselves, usually a fraction of a percent of volume.
Markup: The part added by your processing partner, usually a percentage plus a few cents per transaction. This is the number you can compare and negotiate.
Interchange and assessments are the same no matter which provider you choose. Only the markup differs, which makes quotes easier to compare side by side.
How Is an Interchange Plus Fee Calculated on a Sale?
You add the interchange, the assessment, and the markup together. Here is an illustrative card-present credit sale, using example figures drawn from published industry guides:
Fee component | Example rate | On a $100 sale |
Interchange (standard consumer credit, in person) | 1.65% + $0.10 | $1.75 |
Network assessment | 0.14% | $0.14 |
Processor markup | 0.40% + $0.10 | $0.50 |
Total | $2.39 (2.39%) |
Now run the same math on a $30 sale. Interchange is $0.60, the assessment is $0.04, and the markup is $0.22, for about $0.86, or roughly 2.9%.
The percentage rises on small tickets because the per-transaction cents do not shrink with the sale. If your average ticket is under $30, the cents matter as much as the percentage when you compare quotes.
These numbers are examples, not a quote. Actual interchange depends on the card and the network's current schedule, and markups vary by provider and by merchant category.
Is Interchange Plus Pricing Cheaper Than Flat Rate or Tiered Pricing?
Often, but not always. The answer depends on your volume, your average ticket, and your card mix.
Interchange plus | Flat rate | Tiered | |
What you pay | Actual cost plus a fixed markup | One blended percentage | Rates by "qualified," "mid," and "non-qualified" bucket |
Statement detail | Every component itemized | Single line | Bucketed, less detail |
Tends to suit | Steady volume, mixed card types | Low or unpredictable volume, simplicity | Rarely the best fit for a merchant who can compare options |
Watch for | Extra monthly or statement fees | Higher cost as volume grows | Unclear rules for which bucket a card lands in |
Here is a worked example. A shop runs $30,000 a month in card sales at a $45 average ticket, about 667 transactions.
Using the example rates above, interchange plus costs roughly $790 a month, or 2.6%. A flat 2.9% with no per-transaction fee costs $870.
That is an $80 difference per month, or about $955 a year, and it grows if your card mix leans toward debit. It shrinks or reverses if most of your customers pay with premium rewards cards, since those carry higher interchange. Merchants who move from tiered to interchange plus typically see their effective rate change by a few tenths of a percentage point, depending on card mix.
Flat rate is not wrong. For a new business with unpredictable volume, a single predictable number can be worth a slightly higher cost.
Who Is Interchange Plus Pricing Best For?
It tends to fit in-person merchants who process at least about $10,000 a month, have a steady flow of debit and credit cards, and want to see where each dollar goes.
Retail stores and boutiques: Mixed tickets and a high share of debit cards often work in its favor.
Restaurants and cafes: Predictable weekly volume makes the monthly math easy to check.
Salons, spas, and barbershops: Higher tickets and tipping reduce the effect of per-transaction cents.
Pet stores: Retail purchases and grooming appointments produce a steady mix of ticket sizes.
Food trucks and market vendors: Often better served by a simpler structure until volume is steady.
It is a weaker fit if your volume is very low or irregular, or if you want one number you never have to think about. Pricing programs like dual pricing and cash discount are separate options, and state rules affect which of those you can use. Interchange plus is a back-end cost structure rather than a price display, so it does not raise the same signage and disclosure questions, though you should still confirm your agreement terms.
What Should You Check on an Interchange Plus Quote?
Ask for the full fee schedule in writing, not just the markup. The headline markup can look low while other fees make up the difference.
Check these items before you sign:
Markup structure: The percentage and the per-transaction fee, for both in-person and keyed-in transactions
Monthly fees: Any minimum, statement, or gateway fee
PCI fees: Whether a compliance fee applies, and what it costs if you miss the deadline
Equipment terms: Whether the terminal is purchased, leased, or part of a free terminal program, and for how long
Contract terms: Term length, early cancellation fees, and renewal rules
Statement format: Whether you can see interchange and assessments on separate lines
Fee audits regularly turn up charges merchants did not know they were paying, such as monthly minimums, PCI non-compliance fees, and batch fees. Those line items are where a good-looking quote can lose its edge.
What Should You Do Next?
Pull your last three statements and calculate your effective rate: total fees divided by total card volume. Then compare it with an interchange plus quote built on your actual card mix and average ticket.
Rapid Payments is a merchant services partner and ISO that works through multiple processor partners, so merchants can compare pricing options instead of getting one provider's offer. Once you become a client, a dedicated consultant reviews your setup and stays available as your business changes.
If you want to see what interchange plus pricing would cost on your own card mix, Rapid Payments will review a recent statement and walk through your options with you. Reach out for a no-pressure fee comparison and a clear picture of what a better setup would cost your business.
