Almost every merchant who wants to lower their credit card processing fees starts in the wrong place. They call their processor and ask for a better rate.
The number on your statement is not one price. It is three separate charges stacked on top of each other, set by three different parties, and only one of them is negotiable. Knowing which one is the whole job.
| Component | Who sets it | Who keeps it | Negotiable |
|---|---|---|---|
| Interchange | Visa and Mastercard | The bank that issued the card | No |
| Assessments | Visa and Mastercard | The card networks | No |
| Processor markup | Your processor | Your processor | Yes |
Roughly speaking, interchange is the largest of the three and the one nobody can argue with. Assessments are small and fixed. The markup is the part your processor chose, and it is the part that can move.
This matters because a processor who does not want to lower your rate will happily talk about interchange all day. It is true, it is complicated, and it is not their fault. Meanwhile the number you can actually change never comes up.
Interchange is not a single rate. It is a sorting system. Every transaction gets assigned to a category based on the card used, how it was accepted, what data came with it, and how quickly it settled.
We counted the categories in the schedules Visa and Mastercard published in April 2026, using the counting method the US Government Accountability Office used in 2009 so the numbers are comparable. There are 640 of them. In 2009 there were 303. In 1991 there were eight.
The cheapest category a normal purchase can reach is 1.15% on both networks. The most expensive is 3.15% on Visa and 3.30% on Mastercard. That gap, roughly two points, is what a transaction landing in the wrong box costs you. Nothing on your statement tells you which box it landed in.
You cannot negotiate those rates. What you can do is stop paying more of them than you should, which is a different problem with a different fix.
In order of how much they typically return, and none of them require leaving your processor.
There are three, and they are not equally honest. Interchange plus shows you the true interchange cost and states the markup separately, so you can see what you are paying for. Tiered pricing sorts your transactions into buckets your processor invented, called things like qualified and non-qualified, and the definitions belong to them. Flat rate charges one number for everything, which is simple and usually expensive.
Moving from tiered to interchange plus is often the single largest reduction available, because tiered pricing hides the markup inside a rate that looks like a cost.
A downgrade is a transaction that could have qualified for a cheaper interchange category and did not. Common causes are missing address data on keyed transactions, batches settled late, corporate cards run without the extra data fields they require, and terminals configured years ago and never revisited.
Downgrades are usually fixable at the terminal or gateway, they cost nothing to fix, and they recur every month until somebody notices.
Statement fees, batch fees, monthly minimums, gateway fees, PCI compliance fees, PCI non-compliance fees, annual fees, IRS reporting fees. Some are legitimate. Many are pure markup with an official sounding name, and several are charged at a multiple of what they cost.
PCI non-compliance fees deserve particular attention. They are charged when a merchant has not completed a self assessment questionnaire, and they often continue being charged after the merchant completes it.
Visa and Mastercard publish what they charge. A processor passing through assessments should be passing through exactly that number. Padding here is small per transaction and invisible without a line by line comparison, which is precisely why it works.
Once you know your effective rate, your pricing model, your downgrade rate and your fee schedule, you can have a real conversation about the markup. Before you know those things, you are negotiating against someone who does.
The one number worth calculating yourself
Take the total of every processing charge for one month and divide it by your total card volume for that month. That is your effective rate, and it is the only figure that cannot be dressed up. Compare it across a few months. If it moves while your business has not, something in the sorting is changing and nobody told you.
Reading a merchant statement properly means comparing what you were charged against what the networks published, transaction category by transaction category. It is tedious and it is where the money is.
The recurring findings are consistent: transactions downgrading for reasons nobody has looked at in years, tiered pricing presented as though it were interchange, assessments passed through at more than the published rate, and compliance fees that outlived the compliance problem.
Most of it does not require switching processors. It requires knowing what to look for and being willing to go line by line. If you want to do that yourself, our statement decoder walks through it, and our guide to what interchange rates cost covers the underlying numbers.
Usually not. Most of what makes a statement expensive is pricing model, terminal configuration and fee padding, all of which can be corrected with the processor you already have. Switching is a last resort, not a first move, and it carries its own costs in equipment and downtime.
Not reliably. An advertised rate usually describes the best case category. What you pay depends on how many of your transactions reach it. A quoted 1.79% with heavy downgrading costs more than a quoted 2.1% with none.
Card mix and qualification. A month with more rewards cards, more corporate cards or more keyed transactions costs more even at identical volume. Visa and Mastercard also revise their schedules every April and October.
The first one is free, the engagement is month to month, and we are not tied to any processor. Most clients stay with the processor they already have.
Send us a recent statement and we will tell you what you are actually paying, which transactions are downgrading, and which line items are markup wearing a costume. No switch required, and no charge for the first review.
Read More Check out our other insights here
In 2009 the US Government Accountability Office counted the interchange rate categories Visa and Mastercard used to price credit card transactions. It found 303. Nobody has updated that count since. We did.
Some credit card processors use a quiet tactic known as “enhanced billing.” They quote you a low discount rate to win the account, then inflate the interchange rate underneath it, the fee charged to process each transaction. For a merchant without a deep understanding of th
