Blended pricing charges one rate on every card, wrapping interchange, assessments, and processor markup into a single percentage, sometimes plus a per-item fee. You do not see the three layers. You see a number like 2.50 percent. That is easy to sell and hard to audit. The blend is often a cousin of flat-rate pricing, one published number by design, or a bundled tier sold as if it were one number. It is not interchange-plus, which itemizes wholesale cost and a published markup. None of those shapes is automatically cheaper. The test is effective rate on a real month of volume, not the headline on the quote.
What the blend wraps
Every card sale still has three layers, even when the statement shows one rate. Mixing them up is how a simple quote stays illegible. The full map is in interchange vs assessments vs markup.
Set by the card networks, paid to the issuing bank. Varies by card type, how the card is captured, and merchant category.
Network dues. Pass-through. Small percentage and per-item charges the brands bill the acquirer.
The only layer anyone competes on. Inside a blend, it is not a line, so you cannot see it.
Interchange is paid to the bank that issued the customer's card. Networks set it. Your processor does not. U.S. banks collected nearly $66 billion in interchange in 2025, up from $64 billion in 2024 (Federal Reserve Bank of St. Louis, 9 Apr 2026). That is the large layer, and it moves with card type, how the card is captured, and merchant category.
Assessments are network dues, a smaller pass-through billed to the acquirer.
Markup is what the processor and sales organization add. Inside a blend, markup is not a line. It is whatever is left after wholesale cost. Two merchants on the same 2.50 percent can be funding very different markups if their customers present different cards.
Blended, flat-rate, and interchange-plus
Sales language uses "blended" loosely. Three different contracts get called that. Ask which one you are actually on.
Interchange-plus (IC+) is not a blend. Interchange and assessments pass through at cost. The provider's only earnings are a stated plus, for example 0.25 percent plus $0.10 (illustrative). The statement is longer. The markup is inspectable. See what interchange-plus pricing is.
Flat-rate is the honest published blend: one percentage, often plus a per-item fee, on every card, by design. You buy predictability. You pay the same on cheap debit as on expensive rewards. That is the point. See what flat-rate pricing is.
Blended, as a sales term, often means one of those two, or a third shape: tiered (bundled) pricing sold off a teaser qualified rate. The quote says "2.09 percent." The statement later shows mid-qualified and non-qualified buckets. Each bucket is itself a blend of many interchange categories. The provider decides which cards land where. That is not one rate. It is three blends with a marketing number on the cheapest one.
- One percentage on every card
- Interchange, assessments, and markup in one number
- Statement is short
- Markup is not a line you can audit
- Wholesale cost itemized at cost
- A published plus, the only negotiable layer
- Statement is longer
- You can see what the provider kept
Neither column is the default winner. Debit-heavy, steady volume often looks better when wholesale is not averaged away. Low, seasonal, or new volume often looks better when one number is the product you wanted. The arithmetic on your mix decides, not the name on the slide.
A worked month (illustrative)
Take $100,000 in card volume and 1,000 settled sales. These figures are illustrative. Confirm every line on a real statement.
Quote A, blended (or flat): 2.50 percent plus $0.10
- 2.50 percent of $100,000 = $2,500
- 1,000 x $0.10 = $100
- Total processing: $2,600
- Effective rate: 2.60 percent
Quote B, interchange-plus: interchange $1,450, assessments $140, markup 0.25 percent plus $0.10
- Markup = $250 + $100 = $350
- Total processing: $1,940
- Effective rate: 1.94 percent
On this mix, A costs $660 more this month. Change the plus and it flips.
Quote C, interchange-plus with a fat markup of 1.00 percent plus $0.15, same wholesale:
- Markup = $1,000 + $150 = $1,150
- Total = $1,450 + $140 + $1,150 = $2,740
- Effective rate: 2.74 percent
Now the blend is cheaper. The model name did not decide. The markup and the mix did. A "70 percent savings vs blended" pitch that never shows the plus is selling a comparison you cannot check.
Why card mix makes the blend hard to audit
The blend charges debit and rewards the same percentage. Wholesale does not.
For debit issued by banks with $10 billion or more in assets, Regulation II caps interchange at 21 cents plus 5 basis points, plus up to 1 cent if fraud-prevention standards are met. Smaller issuers are exempt (Federal Reserve, Regulation II). On a $100 ticket that cap is $0.26 to $0.27 of interchange, which is 0.26 to 0.27 percent, before assessments.
A blended 2.50 percent on that same $100 debit sale bills $2.50 plus the per-item fee. The gap between $0.26 of capped interchange and $2.50 of blended discount is where assessments and markup live, and you cannot see the split. Rewards and commercial credit sit much higher at wholesale. The blend charges those cards the same 2.50 percent, so you cannot tell whether you are covering interchange or padding markup.
That is the audit problem. When networks move schedules in April or October, a blend can absorb the change, pass it through, or add to it. You will not know which, because there is no interchange line. On interchange-plus, the plus should not move unless you signed a new schedule. Interchange will move with mix. Both movements are visible.
Typical processing fees are often described as 1.5 percent to 3.5 percent of the transaction plus a per-item fee (U.S. Chamber of Commerce, 4 Jun 2026). Treat that as a range check, not a target and not a Relyon rate. A blend that lands at 2.60 percent can be ordinary or expensive depending on mix. The Chamber range does not tell you which.
How to tell what you are on
Read last month's statement, not the deck.
- One percentage on every card brand and product, no interchange categories, no qualified buckets: blended or flat-rate. Same family.
- Qualified, mid-qualified, non-qualified (or similar buckets): tiered. The advertised rate was the floor, not the bill.
- Interchange categories listed, assessments listed, one markup line: interchange-plus. If the sales deck said "blended IC+" and you cannot find those three blocks, it is not IC+.
- Monthly extras still count. PCI, batch, statement, gateway, and monthly minimums sit outside the percentage. Add them before you compare.
If two card products with very different wholesale costs show the identical discount rate, you are looking at a blend. If most of the volume is not in the cheapest bucket, you are looking at a tiered statement that was sold like a blend.
What to do with the number
Compute effective rate: add every processing line for one full month, divide by gross card volume (not net deposits), multiply by 100. Compare quotes on that number, on the same month.
Then ask for the interchange-plus equivalent in writing: interchange at cost, assessments at cost, markup stated separately. If they cannot produce it, you cannot audit the blend. You are buying a packaged rate, not a disclosed plus.
If you want simplicity and volume is low or lumpy, an honest flat rate can be the right trade. Pay it with eyes open. If volume is steady and debit is a large share of mix, a blend that hides cheap wholesale is usually the expensive quiet option. A blended rate is not a scam and not a bargain. It is a packaging choice. Demand the same arithmetic you would demand of any other model.
FAQ
What is blended pricing for credit card processing? One rate on every card that wraps interchange, assessments, and processor markup into a single percentage, sometimes plus a per-item fee. You cannot see the three layers. Cost is effective rate on a real month, not the quoted percentage.
Is blended pricing the same as flat-rate pricing? Often, when the blend is a published one-rate schedule by design. Salespeople also call tiered pricing blended when they quote a qualified teaser. Ask whether every card actually bills at that one rate.
Is blended pricing cheaper than interchange-plus? Not as a rule. A modest blend can beat a fat interchange-plus markup. A debit-heavy book on interchange-plus can beat a blend that charges cheap debit the same rate as rewards. Compare effective rate on the same month of volume.
How do I know if I am on blended pricing? If the statement applies one percentage to every card product and does not itemize interchange or qualified buckets, you are on a blend or a flat rate. If you see qualified, mid-qualified, and non-qualified, you are on tiered, even if the quote said blended.
What is the difference between blended pricing and tiered pricing? A true blend is one rate on every card. Tiered pricing is several blends: a cheap qualified bucket and more expensive mid and non-qualified buckets the provider controls. The advertised rate is usually only the qualified floor.
Can I negotiate a blended processing rate? You can negotiate the percentage and the per-item fee. You cannot negotiate interchange inside the blend because it is not broken out. If you want a markup you can audit, ask for interchange-plus in writing.
Sources
- Federal Reserve Bank of St. Louis, "Credit and debit card fees collected by banks rose in 2025," 9 Apr 2026
- Federal Reserve, Regulation II (Debit Card Interchange Fees and Routing)
- Federal Reserve, Regulation II small-entity compliance guide
- U.S. Chamber of Commerce, "How to Calculate Credit Card Processing Fees," 4 Jun 2026
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