Interchange Plus Pricing Explained: The Complete Guide for 2026

If you accept credit and debit cards, the pricing model your processor uses determines how much you pay on every single transaction. Most business owners have no idea what model they are on. Even fewer know there is a better option sitting right in front of them.

That option is interchange plus pricing. It is the most transparent, most cost-effective way to pay for payment processing. And most processors will never mention it unless you ask.

I am Grant Denmark, founder of Sleft Payments. I have looked at thousands of merchant statements. The pattern is always the same: businesses on interchange plus pay less. Period. This guide explains exactly why.

What Is Interchange Plus Pricing?

Interchange plus pricing (also called "cost plus" or "IC+") is a pricing model that separates your processing cost into two clear parts:

1. Interchange: The base cost of the transaction, set by Visa, Mastercard, Discover, or Amex. This goes to the bank that issued your customer's card. Every processor in the country pays the exact same interchange. It is not negotiable.

2. The markup ("plus"): Your processor's fee on top of interchange. This is the only part you can negotiate. It is how your processor makes money.

That is it. Two parts. The card network's cost, plus your processor's profit. You see both on your statement, line by line.

Here is what it looks like in practice. Say your processor quotes you interchange + 0.20% + $0.10. A customer pays $100 with a basic Visa credit card:

• Interchange (set by Visa): 1.51% + $0.10 = $1.61
• Processor markup: 0.20% + $0.10 = $0.30
• Total: $1.91

You can verify the $1.61 against Visa's published interchange tables. You can see that your processor charged $0.30. There is nowhere to hide.

Now compare that to a customer who pays $100 with a debit card:

• Interchange (regulated debit): 0.05% + $0.21 = $0.26
• Processor markup: 0.20% + $0.10 = $0.30
• Total: $0.56

Notice something important. The processor's markup stayed the same: $0.30. The only thing that changed was the interchange, which is determined by the card type. You pay the real cost of the card, plus a fixed, visible profit for your processor. Nothing more.

Why Is It Called "Plus"?

The "plus" is the processor's markup. It is the only fee that varies from processor to processor and the only fee you should negotiate.

A typical interchange plus quote looks like this:

Interchange + [percentage] + [per-transaction fee]

For example:

• Interchange + 0.15% + $0.08 (very competitive, high volume)
• Interchange + 0.25% + $0.10 (competitive for most small businesses)
• Interchange + 0.50% + $0.15 (average, room to negotiate)
• Interchange + 1.00% + $0.25 (overpriced, walk away)

The lower the "plus," the less you pay. Simple as that.

What Is a Fair Markup in 2026?

Here is a realistic breakdown based on your monthly processing volume:

If your markup is in the "overpriced" column, you are leaving money on the table. Get a free statement analysis and we will show you the exact number.

Interchange Rates by Card Type (2026)

Interchange rates vary by card brand, card type, and how the transaction is processed. Here are the most common rates you will see:

For a deeper dive into interchange rates and how they work, read our complete interchange fees guide.

Key takeaway: Debit cards cost a fraction of credit cards. If your customers pay with a lot of debit cards (restaurants, convenience stores, grocery, service businesses), interchange plus saves you the most because you pay the real debit rate instead of an inflated flat rate.

Interchange Plus vs Flat Rate vs Tiered: A Real Comparison

There are three main pricing models in payment processing. Let us compare all three using the same business: a retail store processing $20,000 per month with 400 transactions and a typical card mix.

Card mix:

• 35% debit cards ($7,000, 140 transactions)
• 35% standard credit ($7,000, 140 transactions)
• 20% rewards credit ($4,000, 80 transactions)
• 10% corporate/premium cards ($2,000, 40 transactions)

Model 1: Interchange Plus (IC + 0.20% + $0.10)

Monthly total: $353.00
Effective rate: 1.77%

Model 2: Flat Rate (2.6% + $0.10)

Monthly total: $560.00
Effective rate: 2.80%

Model 3: Tiered Pricing (Qualified/Mid/Non-Qualified)

Tiered pricing lumps transactions into buckets. The processor decides which bucket each transaction falls into. Here is a typical tiered structure:

Monthly total: $484.25
Effective rate: 2.42%

Side-by-Side Summary

Annual savings with interchange plus vs flat rate: $2,484
Annual savings with interchange plus vs tiered: $1,575

That is real money. At higher volumes, the gap gets even wider. Want to see your specific numbers? Use our free savings calculator.

Why Most Processors Do Not Offer Interchange Plus

Here is the honest truth: interchange plus pricing limits how much money your processor can make.

On flat rate, your processor collects a fat margin on every debit card transaction. On tiered pricing, your processor decides which "tier" each transaction falls into, and they always choose the most expensive tier when they can. Both models hide the true cost from you.

Interchange plus removes that ability. Your processor's profit is fixed, visible, and verifiable. That is why big aggregators like Square, Stripe, and PayPal do not offer it. Their business model depends on the margin they earn from debit card overpayment.

Traditional processors who use tiered pricing have the same incentive. They take a $0.26 debit transaction, put it in a "qualified" bucket at 1.79%, and charge you $0.54. You never see the real cost. You never know the difference.

Interchange plus ends that game.

The Problem with Tiered Pricing (and Why It Is Worse Than Flat Rate)

Tiered pricing deserves special attention because it is the most common model for traditional merchant accounts, and it is designed to be confusing.

Here is how it works: your processor creates three (sometimes four) pricing tiers:

• Qualified: The lowest rate, shown on your contract. This is the number they use to sell you.
• Mid-Qualified: A higher rate. Applied to transactions that "don't qualify" for the best rate.
• Non-Qualified: The highest rate. Applied to rewards cards, corporate cards, keyed-in transactions, and anything else the processor wants.

The problem? Your processor decides which tier each transaction falls into. There are no published rules. No Visa or Mastercard guidelines. Your processor makes the call, and they are financially motivated to downgrade as many transactions as possible to mid or non-qualified.

I have seen statements where 60% of a business's transactions were billed at the non-qualified rate. The "qualified" rate on the contract looked great. The effective rate on the statement was 3.4%.

With interchange plus, there is no tier. There is no downgrading. You pay the actual interchange for each card, plus the fixed markup. The processor has no ability to reclassify your transactions to make more money.

If you are on tiered pricing right now, switching to interchange plus is almost always the single biggest cost reduction you can make. Send us your statement and we will show you the difference in under 24 hours.

Who Should Use Interchange Plus Pricing?

Interchange plus is the right choice for the majority of businesses. It is especially valuable if:

• You process more than $5,000 per month. The savings outweigh any monthly account fees at this volume.
• You accept a lot of debit cards. Restaurants, grocery stores, convenience stores, gas stations, and service businesses (plumbers, HVAC, lawn care) all see huge savings on debit transactions.
• You sell in person. Card-present transactions have lower interchange than online transactions. Interchange plus lets you benefit from that difference.
• You want to verify what you pay. Every line on your statement is auditable against Visa and Mastercard's published rate tables.
• You plan to grow. As your volume increases, you can negotiate a lower markup. Try doing that on Square's flat rate.

Who Might Not Need Interchange Plus?

Interchange plus is not the right fit for everyone. Consider sticking with flat rate if:

• You process under $3,000 per month. At very low volumes, the $10 to $15 monthly fee on some interchange plus accounts eats into savings. Flat rate with zero monthly fees can be simpler.
• You are a seasonal or pop-up business. If you only process cards for a few months per year, flat rate avoids paying monthly fees during your off months.
• You are just starting out and have no transaction history. Flat rate is fine for your first few months while you figure out your card mix and volume. Switch to interchange plus once you have data.

For a detailed head-to-head comparison, read our interchange plus vs flat rate pricing guide.

Red Flags to Watch For

Not all interchange plus quotes are created equal. Here are the warning signs that a processor is using the interchange plus label without delivering the transparency:

1. The Markup Is Over 0.50%

If your processor quotes interchange + 0.75% or more, they are using the "interchange plus" name to charge you a premium. A markup over 0.50% for a small business is too high. Over 1.00% is borderline predatory.

2. They Bundle Assessments into the Markup

True interchange plus separates three things: interchange, assessments (card network fees, usually 0.13% to 0.15%), and the processor markup. Some processors roll assessments into their markup and call it "interchange plus." This hides the real markup. Ask: "Does your quoted markup include or exclude assessments?"

3. Monthly Minimums or Batch Fees Are Buried in the Fine Print

Some processors advertise a low interchange plus markup but make up the difference with monthly minimums ($25/month if you do not hit a certain volume), batch fees ($0.25 per batch settlement), PCI compliance fees ($99/year), and statement fees ($10/month). Ask for a full schedule of all fees before you sign anything.

4. Long-Term Contracts with Early Termination Fees

Good interchange plus processors offer month-to-month agreements. If a processor requires a 3-year contract with a $495 cancellation fee, the low markup is bait. They are betting you will not leave even if you realize the total cost is higher than advertised.

5. Your Statement Does Not Show Interchange Line Items

If you are supposedly on interchange plus but your statement only shows one blended rate per transaction, you are not on interchange plus. You are on a flat rate or tiered model with a misleading label. True interchange plus statements show the interchange category and rate for each transaction type.

How to Negotiate Your Interchange Plus Markup

Your markup is negotiable. Here is how to get a better one:

1. Know your numbers. Before you negotiate, know your monthly volume, average ticket size, and card mix (percentage of debit vs credit). Processors offer better markups to higher-volume businesses with more debit transactions.

2. Get multiple quotes. Talk to at least three processors. Tell each one you are comparison shopping. The markups will drop.

3. Ask about volume-based repricing. Some processors will lower your markup automatically once you hit a certain monthly volume. Get this in writing.

4. Negotiate the per-transaction fee too. Most people focus on the percentage markup and ignore the per-transaction fee. On 400 transactions per month, the difference between $0.10 and $0.05 per transaction is $20/month, $240/year.

5. Watch for fee creep. Some processors start with a competitive markup and raise it after 6 to 12 months, banking on you not noticing. Review your statement every quarter and compare the markup to your original agreement.

How to Read an Interchange Plus Statement

Interchange plus statements are more detailed than flat rate statements. That detail is the whole point. Here is what to look for:

Section 1: Transaction Summary. Total volume, total transactions, total fees. This gives you your effective rate (total fees divided by total volume).

Section 2: Interchange Charges. Every transaction category, the interchange rate, and the total interchange billed. You can verify these against the published Visa/Mastercard interchange tables.

Section 3: Assessment Charges. Card network fees (Visa, Mastercard, Discover). Usually 0.13% to 0.15% of volume. These are pass-through costs.

Section 4: Processor Markup. Your processor's fee. This should match the markup in your agreement. If it does not, call them.

For a deeper breakdown of every fee on your statement, read our credit card processing fees guide.

Real Example: $50,000/Month Retail Business

Let me show you a real scenario. A retail business processing $50,000 per month with 1,000 transactions. Card mix: 30% debit, 40% standard credit, 20% rewards credit, 10% corporate.

On flat rate (2.6% + $0.10):

• Monthly fees: $1,400
• Annual fees: $16,800

On tiered pricing (1.79%/2.29%/3.29%):

• Monthly fees: $1,175
• Annual fees: $14,100

On interchange plus (IC + 0.20% + $0.10):

• Monthly fees: $885
• Annual fees: $10,620

Switching from flat rate to interchange plus saves this business $6,180 per year. That is a new piece of equipment. A marketing budget. An employee bonus. It is money that was going straight to the processor's pocket for no additional service.

Switching from tiered to interchange plus saves $3,480 per year. Still significant, and that number grows every year your volume increases.

How to Switch to Interchange Plus

Switching is simpler than most people expect:

Step 1: Get your current statement analyzed. Send it to us or use our savings calculator. We will tell you your current effective rate and show you what interchange plus would cost.

Step 2: Compare quotes. Get interchange plus quotes from 2 to 3 processors. Compare the markup, the per-transaction fee, monthly fees, and contract terms.

Step 3: Apply. Most interchange plus processors approve standard businesses in 1 to 2 business days. You will need basic business documents: EIN, bank account, a few months of processing statements.

Step 4: Set up your terminal or gateway. Your new processor will ship equipment or provide gateway credentials. Most businesses are up and running within a week.

Step 5: Keep your old account open for 30 days. This covers any pending transactions, refunds, or chargebacks still tied to the old account.

The entire process takes about a week from application to first transaction.

FAQ

What does interchange plus pricing mean?

Interchange plus pricing means you pay the actual interchange fee (set by Visa, Mastercard, or other card networks) plus a fixed markup from your processor. The interchange varies by card type. The markup stays the same on every transaction. It is the most transparent way to pay for payment processing because you can see exactly what the card network charges and what your processor charges.

Is interchange plus cheaper than flat rate?

For the vast majority of businesses processing over $5,000 per month, yes. Interchange plus is typically 20% to 30% cheaper than flat rate pricing. The savings come primarily from debit card transactions, which have very low interchange rates (as low as $0.26 per transaction) but get charged the full flat rate (often $1.40+ per transaction) under models like Square or Stripe.

What is a good interchange plus rate?

A competitive interchange plus rate for a small business in 2026 is interchange + 0.15% to 0.30% + $0.08 to $0.10 per transaction. If your markup is above 0.50%, you are overpaying. The exact rate depends on your monthly volume, average ticket size, and card mix. Higher volume businesses should expect markups closer to 0.10% to 0.15%.

How is interchange plus different from tiered pricing?

Tiered pricing groups transactions into "qualified," "mid-qualified," and "non-qualified" buckets. Your processor decides which bucket each transaction falls into, and they profit by downgrading transactions to more expensive tiers. Interchange plus eliminates this entirely. You pay the actual interchange for each card, plus a fixed markup. There is no tier assignment, no downgrading, and no hidden reclassification.

Can I get interchange plus pricing for online transactions?

Yes. Online (card-not-present) transactions have higher interchange rates than in-person transactions because of increased fraud risk. But the interchange plus model still applies. You pay the actual online interchange rate plus your processor's markup. Even with higher interchange, this is still cheaper than flat rate or tiered pricing for online businesses.

Do I need a merchant account for interchange plus pricing?

Yes. Interchange plus pricing is available through dedicated merchant account providers, not payment aggregators like Square or Stripe. A merchant account means you have a direct relationship with a payment processor and acquiring bank. The application process is straightforward and most businesses are approved in 1 to 2 days.

What are assessment fees, and are they included in interchange plus?

Assessment fees are charged by the card networks (Visa, Mastercard, Discover) on top of interchange. They typically run 0.13% to 0.15% of volume. On a true interchange plus statement, assessments are listed separately from both interchange and the processor markup. Some processors roll assessments into the markup, which inflates the apparent interchange cost. Always ask your processor whether their markup includes or excludes assessments.

Can I negotiate my interchange plus rate?

You can negotiate the markup portion. Interchange is set by the card networks and is non-negotiable. The best leverage you have is your monthly processing volume and your willingness to get competing quotes. Processors will lower their markup to win or keep your business, especially if you process over $25,000 per month.

How do I verify my processor is charging real interchange rates?

Download the current interchange tables from Visa and Mastercard's websites. Compare the interchange category codes and rates on your statement against the published tables. If any rate on your statement is higher than the published rate for that card type and transaction method, your processor is overcharging. This is one of the biggest advantages of interchange plus: you have the data to verify every charge.

What About Cash Discount? It Eliminates Fees Entirely.

Interchange plus is the most transparent pricing model for businesses that want to see exactly what they pay. But there is an option that goes even further: a cash discount program.

With cash discount, you pay $0 in processing fees. You set your listed prices at the card rate and offer customers a discount for paying with cash. The terminal handles the math automatically. It is legal in all 50 states.

For most small businesses, cash discount is actually the best first choice. You eliminate processing fees entirely. If cash discount does not fit your business (online-heavy businesses, luxury retail, or businesses where the customer experience matters more than the fee savings), interchange plus is the best alternative.

At Sleft Payments, we recommend cash discount first and interchange plus for businesses where cash discount is not the right fit. Either way, you save significantly compared to flat rate or tiered pricing.

The Bottom Line

Interchange plus pricing is the most transparent way to pay for payment processing. It shows you the actual cost of every card plus a small, visible fee for your processor.

But if you want to eliminate processing fees entirely, a cash discount program is the best option for most businesses. You pay $0. Cash discount should be your first consideration. Interchange plus is the best alternative when cash discount does not fit.

The reason most processors do not lead with either option is simple: it limits their profit. Flat rate and tiered pricing let processors collect fat margins that you never see.

If you are processing over $5,000 per month on flat rate or tiered pricing, you are almost certainly overpaying. The math does not lie, and the switch takes about a week.

Use our savings calculator to see your number. Or send us your statement for a free analysis. No contract, no pressure. Just the math.