Cost Reduction through Transparency: Why I love IC++
As we noted last year, (https://payments-roundup.com/example-q1-2025-article-6/ ) small and midsize merchants can reduce card acceptance costs most effectively by moving from opaque flat-rate or tiered processing to Interchange Plus or Interchange Plus Plus (IC++) pricing. Once fees are itemized, merchants can see where the real markup sits, question unexplained charges, and negotiate with more leverage. ISOs don’t always present this option, so you may need to ask for it.
Why pricing transparency matters
Many merchants still pay for card acceptance through bundled pricing models that combine interchange, network assessments, and processor markup into one blended rate. That may look simple, but it makes it hard to know what part of the bill is fixed, what part is pass-through, and what part is negotiable.
Interchange Plus and IC++ solve that problem by separating the major cost components on the merchant statement. In practical terms, the merchant can see what goes to the issuing bank as interchange, what goes to the card networks as assessments, and what the acquirer or processor adds as its own margin
Where merchants can negotiate
A merchant cannot negotiate card-network pricing directly, and interchange tables are generally set by the networks and issuing banks rather than the merchant processor. What is negotiable is the processor or acquirer markup and many of the extra charges that appear around the edges of the statement.
That is why smaller merchants should not think of Interchange Plus as just a pricing model; they should think of it as a visibility tool. Once a merchant can identify markup separately from pass-through costs, it becomes much easier to ask the ISO or acquirer targeted questions and push for lower basis points, lower per-item fees, or removal of unnecessary add-ons.
Why assessments deserve attention
One overlooked line items in card processing is network assessments. These are fees charged by the card networks and billed to the acquirer, which then passes them through the payments chain to the ISO and ultimately to the merchant.
The problem is that merchants on bundled pricing often cannot see whether those assessments are being passed through accurately or whether extra margin has been layered in somewhere along the way. When a merchant is on IC++, those fees are visible, which creates the opportunity to compare billed assessments against public network schedules or benchmark them with an advisor.
Using visibility to apply pressure
When assessment and other pass-through fees are visible, merchants and their advisors can spot inconsistencies—for example, assessment percentages that don’t match card network tables or new miscellaneous fees that are not clearly tied to network charges. Armed with that detail, you can pressure your ISO or processor to justify each line item, remove “junk” fees, and tighten their own oversight of what the acquirer is actually paying to the networks.
Acquirers themselves now have tools and analytics to reconcile what they are invoiced by the networks against what they bill ISOs and merchants, making it easier to identify and correct overcharges. When acquirers use these tools to clean up network cost pass-through, SMB merchants benefit directly through lower effective rates on each transaction.
But if an ISO can just pass the costs through to you, they have little reason to use such tools.
Why visibility helps lower costs
Once assessments and pass-through fees are visible, the merchant can challenge discrepancies instead of absorbing them silently. That pressure matters because the ISO can in turn push the acquirer to review what it is paying the networks and whether those charges are being categorized and billed correctly.
There are also tools and analytics available to help acquirers reconcile network invoices, identify anomalies, and tighten the accuracy of fee pass-through. When that happens, the savings can flow downstream to the small business, lowering its effective acceptance cost without changing sales volume at all.
A practical path for SMBs
For smaller merchants, the smartest sequence is straightforward:
- Switch from flat-rate or tiered pricing to Interchange Plus or IC++ with itemized statements
- Review network assessments, dues, and other pass-through charges line by line.
- Compare those charges against network schedules or independent benchmarks where possible (you made next help to do this)
- Negotiate markup and challenge vague or unexplained fees with the ISO or processor.[
- Fee visibility at a glance
| Fee category | Paid to | Usually negotiable? |
| Interchange | Issuing bank | No |
| Network assessments | Card networks | Not by the merchant directly |
| Acquirer or processor markup | Processor or acquiring bank | Yes |
| Miscellaneous add-on fees | Processor, ISO, or acquirer | Often yes |
For SMBs, the goal is not merely to get a cheaper headline rate. The goal is to gain enough transparency to see where costs originate, identify where pass-through fees may be inflated, and negotiate from a position of evidence rather than guesswork. That is why moving to Interchange Plus or IC++ is often the first and most important step in reducing the real cost of payment acceptance.