Every so often, a payments law comes along that looks small on paper but has the potential to create a ripple effect far beyond its borders. The Illinois Interchange Fee Prohibition Act (IFPA) is one of those laws.
At a high level, IFPA says this: Merchants should not pay interchange fees on money that isn’t really theirs, specifically, sales tax and gratuities.
Historically, interchange has been calculated on the entire transaction amount, even though part of that money is immediately passed along to the state or to employees. Illinois lawmakers decided that didn’t make sense anymore.
Sounds simple enough, right? As with most things in payments…It’s not.
To balance things out, the law also limits how much a merchant can keep for collecting and remitting Illinois sales tax. With this law, it is now capped at $1,000 per month. That’s not a rebate. It’s not a check from the state. It’s just a ceiling on reimbursement.
And while IFPA is an Illinois law, it’s not just an Illinois issue.
This law challenges a long‑standing assumption in the payments ecosystem: that interchange applies uniformly to the full transaction amount, everywhere, all the time. IFPA cracks that door open by regulating what parts of a transaction can be included in interchange, something that has traditionally been governed by card network rules, not state legislation.
Once that door is open, it’s fair to ask: Who else might walk through it?
Why This Matters Beyond Illinois
IFPA introduces something new: transaction‑level regulation of interchange. It treats tax and gratuity not as background details, but as data elements that can be regulated.
If other states decide to follow suit, we could see:
- Different interchange rules by state
- More fragmented network requirements
- Increased compliance complexity for national merchants, processors, and POS providers
In other words, interchange starts looking less like a nationally consistent pricing model and more like a patchwork quilt. And patchwork quilts are rarely efficient to manage.
The Operational Reality Check
One important thing to clear up right away: IFPA does not eliminate interchange fees. It shifts responsibility.
Networks and issuers largely keep their pricing structures intact. The operational burden, system changes, data handling, reconciliation, and compliance land squarely on merchants and processors.
Any savings from reduced interchange are theoretical unless everything works perfectly. And in payments, “perfect” is a high bar.
For Illinois merchants, the real‑world impact depends heavily on payment technology readiness. Many merchants will need:
- POS enhancements
- Processor support
- New reconciliation processes
- A fresh look at PCI DSS scope
If systems can’t cleanly separate tax and gratuity at the right points in the transaction flow, the cost of compliance can quickly outweigh the expected savings.
CampusGuard’s Perspective
From our viewpoint, IFPA represents a meaningful policy shift, but not a universally automatic win.
Before rushing to implement changes, merchants should pause and ask a few practical questions:
- Can my POS and processor actually support this today?
- Where does tax and gratuity data flow, and where does it get stored?
- Does this expand my PCI scope?
- What happens if reconciliation fails or data is misclassified?
In many cases, the operational and compliance costs may exceed near‑term interchange relief.
Appeals of the February 2026 court decision are expected, but as it stands today, the Illinois interchange prohibition is scheduled to take effect July 1, 2026.
Merchant FAQs
Here are some questions we’re already hearing:
1. Does IFPA eliminate interchange fees entirely?
No. It only applies to the sales tax and gratuity portions of a transaction. Interchange still applies to the base purchase amount.
2. Will I get $1,000 from the state each month?
No. The $1,000 figure is a cap, not a payment. It limits how much a merchant can retain for collecting and remitting Illinois sales tax.
3. Do I need to change my POS system?
Maybe. Compliance may require your systems to separately identify and transmit tax and gratuity amounts during authorization or settlement, and not all platforms can do that today.
4. What if my system can’t separate tax and tip in real time?
The law allows post-transaction reconciliation, but that usually means more manual work, more data handling, and potentially more PCI risk, often relying on processor-specific solutions.
5. Does IFPA affect PCI DSS compliance?
It can. New data flows, storage, or system changes can expand PCI scope, invalidate prior assessments, and increase audit and documentation requirements.
6. What are the risks of getting it wrong?
Incorrect implementation can lead to PCI compliance issues, audit findings, processor penalties, remediation costs, and increased exposure if there’s a data incident.
7. Should every merchant implement IFPA changes immediately?
Not necessarily. Start by talking to your processor and POS providers. Understand readiness, assess compliance impact, and compare realistic savings against total cost.
Have a question that wasn’t answered above? Contact us with your question, and we will reach out to you with an answer.
CampusGuard’s Treasury Solutions team can assess merchant departments across your environment to provide clear insight into how this law will affect your organization. Reach out to us for expert guidance.
