Interchange-plus pricing is a credit card processing model that separates the wholesale cost set by Visa and Mastercard (interchange) from the markup your processor charges (the plus). Instead of bundling every transaction into one blended rate, your statement shows the exact interchange fee, the card network assessment, and a fixed processor margin on top. That transparency is the reason most cost-conscious merchants who run more than $15,000 a month in card volume end up switching to it.
ProTech Payments sets up interchange-plus accounts for businesses across Katy, Houston, Sugar Land, and Fort Bend County, and the savings versus a flat-rate provider like Square or a tiered legacy account are usually measurable on the first statement. A retailer paying a blended 2.9% who moves to interchange-plus at cost plus 0.20% and $0.10 per transaction often drops their effective rate to the 2.1% to 2.4% range. On $50,000 in monthly volume, that is roughly $250 to $400 back in your pocket every month.
This guide breaks down how interchange-plus works, what the numbers actually look like, how it compares to tiered and flat-rate pricing, and where the model makes sense for Texas merchants. If you want the math on your own account, a free statement analysis will pull your real numbers before you commit to anything.
What interchange-plus pricing is
Interchange-plus pricing has three stacked components, and the model is honest about all of them. Understanding each one is the difference between reading your statement and just paying it.
The three layers of every card transaction
Every card sale you accept carries three real costs. The first is interchange, the fee set by Visa, Mastercard, Discover, and American Express that goes to the bank that issued your customer’s card. The second is the network assessment, a small fixed percentage Visa and Mastercard keep for running the rails. The third is your processor’s markup, which is the only piece any provider actually competes on.
Interchange-plus pricing exposes all three. A blended or tiered account hides the first two inside one number so you cannot tell what you are paying for. That is the core distinction: interchange-plus is a pass-through model, and tiered pricing is a markup model dressed up as simplicity.
Why interchange is non-negotiable
No processor can lower interchange. Visa and Mastercard publish these rates publicly and update them in April and October each year. A regulated debit card under the Durbin Amendment is capped near $0.21 plus 0.05%, while a rewards credit card can run past 2.10% plus $0.10. When a salesperson promises to beat interchange, they are either confused or padding the markup elsewhere. The wholesale cost is identical for every merchant of your type, which is exactly why the markup is where you should focus. Our merchant services accounts are built around that principle.
How interchange-plus is calculated
The arithmetic is simple once you see it laid out. Your total cost per sale equals interchange plus the assessment plus your agreed processor markup.
A worked example
Take a $100 rewards-credit-card sale at a retail store. Interchange on a Visa Signature card runs about 2.10% plus $0.10, so $2.20. The Visa assessment adds roughly 0.14%, so $0.14. If your interchange-plus deal is cost plus 0.20% and $0.10, the markup is $0.30. Your total cost is $2.64, an effective rate of 2.64% on that ticket.
Run the same $100 sale on a regulated debit card and the math changes hard. Interchange is about $0.26, the assessment is near $0.14, and the same markup is $0.30, for a total of $0.70, an effective rate of 0.70%. A flat-rate processor would charge you 2.90% plus $0.30 on both, meaning you overpay massively on the debit transaction. This is why businesses with heavy debit volume benefit most from passing interchange through directly, and it ties into in-store payments where card-present rates are lowest.
Reading the markup on your statement
A clean interchange-plus statement lists the markup as a single visible line, often written as “discount rate 0.20% + $0.10.” Everything else on the statement should reconcile to published Visa and Mastercard schedules. If you cannot find that markup line, you are probably on a tiered plan. The credit card processing fee calculator lets you model your own blend before you call anyone.
Interchange-plus vs tiered vs flat-rate
The three dominant pricing models behave very differently as your volume grows. The table below uses a $50,000 monthly card mix that is typical for a Katy retailer or restaurant.
| Model | How it prices | Effective rate on $50k mix | Monthly cost | Transparency |
|---|---|---|---|---|
| Flat-rate (Square, Stripe) | One blended rate on all cards | 2.90% + $0.30/txn | ~$1,575 | Low, no interchange visibility |
| Tiered (qualified/mid/non-qual) | Buckets cards into 3 rate tiers | 2.45% blended | ~$1,225 | Very low, processor controls tiers |
| Interchange-plus | Pass-through cost + fixed markup | 2.25% effective | ~$1,125 | High, every fee itemized |
Why tiered pricing usually costs more
Tiered pricing looks cheap because the “qualified” rate quoted to you is low. The catch is that the processor decides which transactions qualify, and rewards cards, corporate cards, and keyed sales get downgraded into expensive non-qualified tiers. Merchants routinely find 40% to 60% of their volume landing in the priciest bucket. Interchange-plus removes that discretion entirely, which is why we steer most clients away from tiered accounts during a free statement analysis.
Where flat-rate still wins
Flat-rate is not always wrong. A new business processing under $5,000 a month, with unpredictable timing and a strong need for simplicity, often comes out fine on Square or Stripe because the per-transaction certainty outweighs the margin. The crossover point usually sits between $8,000 and $15,000 in monthly volume. For a deeper breakdown, our guide on choosing a payment processor for a small business walks through the thresholds, and Square fees explained shows exactly where flat-rate margin hides.
What a fair markup looks like
The markup is the only number you control, so it is worth knowing the going range. Interchange and assessments are fixed, but processor margins vary widely between honest and predatory.
Typical markup ranges
For most retail and service businesses, a competitive card-present markup sits between 0.15% and 0.30% plus $0.05 to $0.10 per transaction. Card-not-present and ecommerce accounts run slightly higher because of fraud exposure, often 0.25% to 0.40% plus a per-transaction fee. Anything above 0.50% plus $0.15 for a standard low-risk merchant is a markup worth challenging. Our online payments and payment gateway accounts are priced inside the competitive band.
Watch the junk fees
The markup line is not the whole story. Monthly statement fees, PCI non-compliance penalties, batch fees, and “regulatory” surcharges can quietly add $40 to $100 a month and inflate your real effective rate. A genuine interchange-plus quote should list these flat fees plainly so you can add them into your true cost. Staying current on PCI compliance avoids the most common avoidable penalty, which often runs $20 to $40 monthly when ignored.
When interchange-plus makes sense by vertical
The model rewards different businesses for different reasons. Card mix, ticket size, and channel all change the math.
Restaurants and retail
Restaurants process a high count of mid-size tickets with heavy rewards-card use, so passing interchange through directly protects margin on every cover. Retailers with strong debit volume see the sharpest savings because regulated debit interchange is so low. We tune accounts for both through restaurant merchant services and retail merchant services, often paired with Clover hardware running on the Fiserv (First Data) platform.
Service, B2B, and high-ticket businesses
Auto repair shops, salons, and home-services contractors with larger average tickets benefit because a fixed per-transaction fee shrinks as a percentage of a $400 sale. B2B and wholesale sellers gain even more, since commercial and corporate cards carry high interchange that tiered processors love to mark up. Level 2 and Level 3 data on B2B transactions can lower interchange itself, a savings only an interchange-plus account passes back to you. Our B2B and wholesale merchant services and auto repair merchant services accounts are configured for that data.
Pairing with dual pricing or cash discount
Many Texas merchants pair interchange-plus with a dual pricing or cash discount program to recover the processor cost from card-paying customers while keeping a transparent wholesale base. The combination is legal in Texas when implemented correctly, and our piece on cash discount programs in Texas covers the compliance details.
Common mistakes and pitfalls
Merchants lose money on interchange-plus through avoidable execution errors, not the model itself.
Chasing the lowest quoted markup
A 0.05% markup quote can hide $80 in monthly junk fees, leaving you worse off than a 0.20% markup with no add-ons. Always compare total monthly cost, not the headline rate. The only reliable way to do that is to run your last full statement through a real analysis rather than trusting a verbal pitch.
Ignoring downgrades from poor data
Keyed transactions, missing AVS data, and late batching push transactions into higher interchange categories, a process called downgrading. Even on interchange-plus you pay the higher interchange when this happens. Using a proper virtual terminal with full address verification and batching daily keeps your transactions in their lowest qualifying category.
Skipping the statement review
The single biggest mistake is never re-reading the statement after signing. Processors can raise the markup or add fees over time. A quarterly check against published interchange tables catches creep early, and chargeback exposure should be watched alongside it through chargeback management. Our chargeback prevention playbook covers the operational side.
Interchange-plus for Texas merchants
Texas businesses have specific reasons to prefer interchange-plus, and the local payments landscape rewards it.
The Texas surcharge and dual-pricing angle
Texas permits credit card surcharging and dual pricing within Visa and Mastercard rules, and an interchange-plus base makes those programs cleaner because you know your true wholesale cost. Setting a customer-facing card price on top of a transparent base is far easier than guessing against a blended rate. The local guide on credit card surcharge laws in Texas lays out the current rules.
Local setup and support in the Houston area
ProTech Payments is based in Katy and works on-site across Houston, Sugar Land, Richmond, Cypress, and Pearland. Local merchants get merchant services in Katy, TX and merchant services in Houston, TX with face-to-face statement reviews, hardware setup, and EMV-compliant terminal configuration. PCI DSS compliance, EMV chip acceptance, and contactless are handled at install so your account stays in its lowest cost tier from day one.
Frequently asked questions
Is interchange-plus always cheaper than flat-rate?
Not always, but usually above $8,000 to $15,000 in monthly volume. Below that, flat-rate simplicity can outweigh the savings. The deciding factor is your card mix and average ticket, which a statement analysis measures precisely.
Can a processor really not lower interchange?
Correct. Interchange is set by Visa, Mastercard, Discover, and American Express, and it is identical for every merchant of your type and channel. Any provider claiming to beat interchange is marking up elsewhere or misreading their own pricing.
What is a good interchange-plus markup?
For low-risk card-present businesses, 0.15% to 0.30% plus $0.05 to $0.10 per transaction is competitive. Card-not-present runs slightly higher. Always factor in monthly and junk fees, since a low markup with heavy add-ons can cost more than a higher transparent rate.
Does interchange-plus work with Clover and existing hardware?
Yes. Interchange-plus is a pricing model, not a hardware requirement, so it runs on Clover, terminals on the Fiserv (First Data) network, and most modern POS systems. We can often reprice your account without changing equipment.
How do downgrades affect my interchange-plus rate?
Downgrades happen when a transaction misses data requirements (keyed entry, missing AVS, late batching) and falls into a pricier interchange category. You still pay the markup on top of that higher interchange, so clean data entry and daily batching directly protect your effective rate.
How fast can I see savings after switching?
Most merchants see the difference on their first full statement, typically 30 days after switching. The savings are immediate on every transaction; the statement simply confirms them in writing.
Talk to ProTech Payments
Interchange-plus pricing rewards merchants who read their statements and pick a fair markup. The fastest way to know whether it saves you money is to look at your real numbers, not a sales estimate.
Start with a free statement analysis and we will itemize your current interchange, assessments, and markup against a transparent interchange-plus quote. When you are ready to switch, get started or contact our Katy team and we will configure your account, hardware, and PCI compliance to keep every transaction in its lowest cost tier.
