Blended vs unbundled pricing:
reading the difference on
a statement

Two processors can quote you the exact same number — say, 2.75% — and hand you completely different statements six months later. That's because "2.75%" describes a price, not a pricing model. Underneath it, you're either on blended pricing, where the processor charges one flat rate regardless of what the card actually costs them, or unbundled pricing (usually called interchange-plus), where they pass the real wholesale cost through and charge a separate, visible markup. The two look identical on a sales call. They read completely differently on a statement — and for most merchants, the gap between them is the single biggest lever on the page.

What "blended" actually means

Blended pricing takes every card transaction — a $0.60-interchange debit swipe and a $3.40-interchange rewards credit card, both in the same batch — and charges the same flat percentage on each. The processor collects that flat rate, pays the real interchange to the issuing bank and the assessment to the network, and keeps whatever is left as margin. On the cheap transactions, that margin is large. On the expensive ones, it's thin or even negative. Averaged across your batch, the processor still comes out ahead — that's the entire point of the model — but you have no way to see, from the statement alone, how much of your 2.75% was interchange and how much was pure markup.

That opacity isn't necessarily a scam. Flat-rate pricing is genuinely simpler to sell, bill, and forecast, which is why software platforms and point-of-sale bundles lean on it heavily. But simplicity for the processor is not the same as a good deal for you, and the two get conflated constantly.

What "unbundled" (interchange-plus) actually means

Unbundled pricing separates the bill into its real components. Interchange — the fee set by Visa and Mastercard and paid to the customer's issuing bank — passes through at the network's published rate for that specific transaction, unmarked-up. Network assessments pass through the same way. On top of both, the processor adds one clearly stated markup, typically expressed as a small percentage plus a few cents per transaction (for example, "interchange + 0.30% + $0.10"). That markup is the processor's entire compensation, and it's the same number on every transaction regardless of card type.

Because interchange itself varies enormously by card type — regulated debit runs a small fraction of what a corporate rewards card costs — an interchange-plus statement will show a wide range of per-transaction rates. That range is not a red flag. It's the model working correctly: you're seeing the real cost of each card, plus one honest fee for the processor's service.

Blended pricing answers "what will this cost on average?" Unbundled pricing answers "what did this specific transaction actually cost?" Only one of those answers helps you audit a statement.

Reading it off the statement, line by line

You don't need a glossary to tell the two apart — you need to look for one thing: are interchange categories broken out by name, or not?

What you see	Blended statement	Unbundled (interchange-plus) statement
Debit line items	One rate applied to all debit volume (e.g. "Debit — 2.75%")	Multiple lines by category (e.g. "CPS Retail Debit — 0.80% + $0.15", "CPS Card Not Present Debit — 1.65% + $0.15")
Credit line items	One rate applied to all credit volume (e.g. "Credit — 2.75%")	Multiple lines by network tier and card type, each with its own published rate
Processor's markup	Not disclosed as a separate number — embedded in the flat rate	Shown as one consistent add-on, often labeled "discount rate" or "markup," applied identically across every line
Rewards/corporate cards	Same flat rate as a basic debit card	Visibly higher rate, matching the higher interchange those cards actually carry

If your statement shows a handful of interchange category names — "CPS Retail," "CPS Card Not Present," "Standard," "Electronic Interchange Reimbursement Fee" — each with its own percentage and per-item fee, you're on interchange-plus. If everything debit gets one number and everything credit gets one number, you're blended, no matter what the sales rep called it.

Why the model matters more than the headline rate

A flat 2.75% sounds cheaper than "interchange + 0.30% + $0.10" until you do the arithmetic for your own card mix. Regulated debit interchange under Regulation II is capped for large issuers — commonly cited around 0.05% plus a small flat amount plus a fraction of a cent for fraud prevention, illustratively landing well under 1% all-in on a typical ticket. If a processor charges you 2.75% flat on that same debit swipe, their margin on that single transaction is enormous — multiple times their actual cost. On a business running 60% debit, that spread compounds fast, which is exactly the gap MidPay's own founding story ran into: a flat 2.75% rate on a 60%-debit mix works out to roughly $378 a month, or $4,536 a year, more than an interchange-plus structure priced at MidPay's 1.49% debit / 2.69% credit rates on the same $50,000/month volume.

The inverse is also true: a merchant with an unusually high share of premium rewards or corporate cards, where interchange routinely runs 2.5%-3.5%+ per swipe, can occasionally find a well-priced flat rate competitive, because it caps the downside on the most expensive cards. That's the exception, not the rule — most small and mid-size merchants run debit-heavy enough that unbundled pricing wins the math. The only way to know for certain is to run your own numbers, not accept a rule of thumb; see our five-minute effective rate calculation for the exact formula.

The downgrade wrinkle that hides in both models

One trap applies regardless of pricing model: a transaction that doesn't meet a card network's qualifying criteria — manually keyed instead of swiped or tapped, missing address verification, a late-settled batch — gets bumped, or "downgraded," to a higher interchange category. On an interchange-plus statement, that downgrade is visible: you'll see the transaction land in a more expensive category line with a note or a distinguishable rate. On a blended statement, the same downgrade is invisible, because every transaction already gets charged the same flat rate — the processor simply absorbs a slightly worse spread on that one transaction, or occasionally passes a separate downgrade surcharge through as an added line item, which is itself worth flagging if you see it recur.

Either way, downgrades are usually an operational fix (batch timing, card entry method, AVS settings), not a pricing-model problem — but interchange-plus merchants have a much easier time spotting them because the category names tell the story.

How to check which one you're on right now

1. Pull your most recent full statement.
2. Scan the transaction detail or summary-by-category section for interchange category names (anything starting with "CPS," "EIRF," or listing Visa/Mastercard tier names).
3. If you find several distinct percentages tied to specific card categories, you're unbundled — note the add-on markup, which should be the same across every category.
4. If you find one number for all debit and one number for all credit with no further breakdown, you're blended — there is no way to isolate the processor's margin from that statement alone.
5. Either way, calculate your effective rate and compare it against your card mix to see which model would actually save you money.

Frequently asked questions

What is the difference between blended and unbundled pricing?

Blended (flat-rate) pricing charges one fixed percentage per card type — debit or credit — no matter what the underlying interchange actually costs, so the processor's margin is invisible and varies transaction to transaction. Unbundled (interchange-plus) pricing passes the wholesale interchange cost through at the exact rate set by the card networks and adds one separate, disclosed markup on top, so the markup is a fixed, visible number.

How can I tell which pricing model I have from my statement?

Look for interchange category names like CPS Retail Debit or CPS Retail Credit listed as separate line items with their own rates. If you see those, you are on interchange-plus. If your statement shows only one or two flat percentages applied to all debit and all credit volume with no interchange categories broken out, you are on blended pricing.

Is unbundled pricing always cheaper than blended pricing?

Not automatically — it depends on the markup and your card mix. A debit-heavy business almost always does better on interchange-plus because debit interchange is cheap and a flat blended rate erases that savings. A business with an unusually high share of premium rewards or corporate cards can sometimes find a well-priced flat rate competitive, since it caps the downside on expensive cards. The only way to know is to compare the actual markup against your own statement.

Why would a processor prefer blended pricing?

Blended pricing is simpler to sell and simpler to bill, and it lets the processor keep the spread between cheap interchange categories (like regulated debit) and the flat rate charged, without disclosing that spread anywhere on the statement. It is not inherently deceptive, but it is opaque by design, which is why interchange-plus is the pricing model most often recommended for merchants who want to see exactly what they are paying for.