What Is Interchange-Plus Pricing? The Only Pricing Model That Shows You the Truth

Most Merchants Have No Idea What They're Paying

Here's a number that should bother you: the average small business pays between 2.5% and 3.5% per credit card transaction. But the actual cost to process that transaction — what Visa and Mastercard charge — is usually between 1.5% and 2.1%.

So where does the rest go? Your processor's markup. And most pricing models are specifically designed to make that markup invisible.

If you run a business that processes credit cards — whether you're a restaurant, a retail store, a contractor, or an e-commerce shop — understanding pricing models is the single most impactful thing you can do to reduce costs. It's not glamorous. It's not exciting. But for a business doing $30,000/month in card sales, the difference between a bad pricing model and a good one can be $3,600–$7,200 per year.

That's real money. Let's break down how pricing actually works.

How Credit Card Processing Fees Work (The Basics)

Before comparing pricing models, you need to understand the three components of every credit card transaction fee:

1. Interchange Fees

This is the fee charged by the card-issuing bank (the customer's bank). Visa and Mastercard publish their interchange rates twice a year — in April and October. These rates are non-negotiable. No processor can reduce them.

Interchange rates vary based on:

• Card type — debit cards cost less than credit cards; rewards cards cost more than basic cards
• Transaction method — swiped/dipped transactions cost less than keyed-in or online transactions
• Merchant category — grocery stores and gas stations get lower rates than general retail
• Transaction size — some interchange categories have flat-fee components that hit small tickets harder

For a typical retail business, interchange ranges from about 0.5% (regulated debit) to 2.4% (premium rewards credit card).

2. Assessment Fees

Also called "network fees" or "brand fees," these are charged by Visa, Mastercard, Discover, and American Express for using their network. They're typically small — around 0.13%–0.15% — and are also non-negotiable.

3. Processor Markup

This is the only part of your processing cost that's negotiable. It's what your payment processor charges for their service — authorization, settlement, risk management, customer support, hardware, reporting, and everything else.

The key insight: Interchange + assessments are fixed costs. The processor markup is where you save or lose money. And the pricing model you're on determines how visible — or hidden — that markup is.

The Three Main Pricing Models Compared

Tiered Pricing (The Most Common — and Most Opaque)

Tiered pricing is still the most widely used model in the industry, despite being the least transparent. It bundles transactions into three categories:

• Qualified — the lowest rate, usually applied to standard swiped debit or credit cards
• Mid-Qualified — a higher rate applied to rewards cards, keyed-in transactions, or cards that don't meet "qualified" criteria
• Non-Qualified — the highest rate, applied to corporate cards, international cards, and transactions the processor decides don't fit the other tiers

The fundamental problem: There's no industry-standard definition of what makes a transaction "qualified" vs. "non-qualified." Your processor decides. A rewards Visa might be "qualified" with one processor and "mid-qualified" with another. This gives processors enormous room to inflate costs without you noticing.

Real-world example: A restaurant processing $40,000/month on tiered pricing might see a statement that says:

• Qualified rate: 1.69% (looks great, right?)
• Mid-qualified surcharge: +0.75%
• Non-qualified surcharge: +1.25%

If 60% of their transactions are mid- or non-qualified (common with rewards cards), their effective rate is actually 2.8%–3.2%. The "1.69%" was marketing, not reality.

Who benefits from tiered pricing? Processors. Not merchants. If a processor quotes you tiered pricing, they're prioritizing their margins over your transparency.

Flat-Rate Pricing (Simple, But Expensive at Scale)

Flat-rate pricing gives you one rate for everything. It's the model used by Square, Stripe, PayPal, and most modern payment facilitators.

Common flat rates (2026):

• In-person: 2.6% + $0.10
• Online: 2.9% + $0.30
• Keyed-in: 3.5% + $0.15

Advantages:

• Dead simple. One rate, no surprises.
• No monthly fees, no contracts (usually).
• Easy to forecast costs.

Disadvantages:

• You pay the same rate whether a customer uses a basic debit card (interchange cost ~0.5%) or a premium Amex (interchange cost ~2.4%).
• No room to negotiate. The rate is the rate.
• At higher volumes, it becomes significantly more expensive than interchange-plus.

The break-even point: For most businesses, flat-rate pricing stops being competitive somewhere between $8,000 and $15,000/month in card volume. Below that, the simplicity and lack of monthly fees can be worth the slightly higher per-transaction cost. Above that, you're leaving money on the table every single month.

Who flat-rate works for: Farmers' markets, pop-up shops, side hustles, seasonal businesses, and any business processing under $10,000/month that values simplicity over optimization.

Who it doesn't work for: Restaurants, retail stores, professional services, healthcare offices, and any established business with consistent card volume.

Interchange-Plus Pricing (The Transparent Option)

Interchange-plus (also called "cost-plus") separates the three components cleanly:

Interchange (actual bank cost) + Assessment (network fee) + Processor Markup (their profit)

The processor's markup is stated as a fixed percentage plus a per-transaction fee. For example:

Interchange + 0.25% + $0.10

This means:

• If interchange on a basic Visa debit transaction is 0.80%, your total is 1.05% + $0.10
• If interchange on a rewards Mastercard is 1.95%, your total is 2.20% + $0.10
• If interchange on an Amex is 2.30%, your total is 2.55% + $0.10

The processor makes the same margin regardless of card type. You benefit from lower-cost cards. Everything is auditable because interchange rates are published by the card networks.

Why Interchange-Plus Is Better for Your Business

Complete Transparency

Every line on your statement ties back to a published interchange rate. You can verify every charge against Visa and Mastercard's published tables. No other pricing model offers this.

Your Processor Can't Hide Margin

The markup is fixed and visible. If your processor charges interchange + 0.30% + $0.10, and they raise it to interchange + 0.45% + $0.10, you'll see it immediately. On tiered pricing, a processor can increase your effective rate by reclassifying transactions — and you'd never know.

You Benefit From Lower-Cost Cards

On interchange-plus, debit card transactions actually save you money. A regulated debit transaction with interchange of 0.05% + $0.21 costs you dramatically less than a rewards credit card. On flat-rate pricing, you pay the same regardless.

You Can Compare Processors Objectively

When every processor quotes interchange-plus, comparing them is simple: who has the lower markup? With tiered pricing, there's no apples-to-apples comparison because each processor defines the tiers differently.

It Scales With Your Business

As your volume grows, interchange-plus processors will often reduce your markup. A business doing $200,000/month in card sales can negotiate a markup as low as 0.05%–0.10% + $0.05. Try getting that from Square.

Pricing Model Comparison Table

Factor	Tiered	Flat-Rate	Interchange-Plus
Transparency	Low — tiers hide true cost	Medium — one rate, but no breakdown	High — full cost visibility
Cost at $10K/mo	$250–$400	$290–$310	$200–$260
Cost at $50K/mo	$1,400–$2,000	$1,450–$1,550	$900–$1,200
Cost at $100K/mo	$2,800–$4,000	$2,900–$3,100	$1,700–$2,200
Negotiable	Partially (qualified rate only)	No	Yes (markup portion)
Debit card savings	Hidden	None	Significant
Auditability	Difficult	Moderate	Full
Best for	Nobody (seriously)	Low-volume/new businesses	Any business over $10K/mo

How to Read an Interchange-Plus Statement

An interchange-plus statement will show you:

1. Transaction detail — each transaction with its interchange category (e.g., "VS Credit Rewards 2" = Visa rewards card tier 2)
2. Interchange cost — the exact rate and per-item fee for that category
3. Processor markup — your agreed-upon markup applied on top
4. Total cost — interchange + assessment + markup combined

Pro tip: Calculate your "effective markup" by subtracting total interchange and assessments from your total fees. Divide the remainder by your total volume. This is what your processor actually earned. If it's higher than what was quoted, something is wrong.

How to Switch to Interchange-Plus

Step 1: Request a Statement Analysis

A reputable processor will review your current statement for free and show you exactly what you're paying vs. what you should be paying. At Payment USA, we do this for every prospective merchant — no obligation, no strings.

Step 2: Compare the Markup, Not the Rate

Don't fall for "effective rate" comparisons. A processor quoting a 2.1% effective rate on tiered pricing isn't comparable to one quoting interchange + 0.25%. Compare apples to apples: markup to markup.

Step 3: Watch for Junk Fees

Even with interchange-plus, some processors add monthly fees, PCI fees, annual fees, or batch fees on top. Ask about every single line item. A good processor will have a short, clear list of fees — and none of them should be surprises.

Step 4: Verify the Contract Terms

Reputable interchange-plus processors don't need 3-year contracts with early termination fees. If a processor requires one, they're not confident you'll stay voluntarily. That should tell you something.

Common Objections (And Why They're Wrong)

"Interchange-plus statements are confusing." They have more detail — but that detail is your friend. A confusing statement means you can see everything. An "easy" tiered statement means they're hiding things.

"My current processor already gives me a good rate." Maybe. But without interchange-plus, you can't verify that. You're trusting a company with a financial incentive to charge you more.

"I don't process enough to bother switching." If you process more than $5,000/month in cards, switching to interchange-plus can save $500–$2,000/year. That's worth 30 minutes of paperwork.

Frequently Asked Questions

What is the average interchange rate?

For a typical small business processing a mix of debit and credit cards, the weighted average interchange rate is usually between 1.5% and 2.0%. Debit cards are significantly cheaper (0.5%–1.0%), while premium rewards and corporate cards are more expensive (2.0%–2.5%).

Can I negotiate interchange rates?

No. Interchange is set by Visa and Mastercard and applies equally to all processors. What you can negotiate is the processor's markup on top of interchange.

Is interchange-plus available for small businesses?

Yes. While interchange-plus was historically reserved for larger merchants, most modern processors now offer it to businesses of all sizes. If a processor tells you that you need to process $50,000/month to qualify, find a different processor.

How often do interchange rates change?

Visa and Mastercard update their interchange tables twice a year — typically in April and October. Your processor should adjust their billing automatically when rates change.

What's a good interchange-plus markup?

For a typical small to mid-size business, a competitive markup ranges from 0.15% + $0.08 to 0.35% + $0.12. Anything above 0.50% + $0.15 is on the high side unless you're in a high-risk industry.

The Bottom Line

If your processor can't show you exactly what they're making on every transaction, you're overpaying. Interchange-plus pricing isn't a sales pitch — it's the only model that treats merchants like adults.

The payment processing industry has spent decades making pricing confusing. Interchange-plus is the antidote.

Get a free statement analysis →