Start at the back
Merchant statements are designed to be read front to back, which is exactly why you should not do that. The front page shows volume and a summary designed to look reasonable. The fee detail — the part that decides what you actually paid — is usually two or three pages in.
Find total fees for the month and total card volume. Divide the first by the second. That is your effective rate. Do that before reading anything else, because every other number on the statement is context for it.
Separate cost from markup
On an interchange-plus statement, interchange and assessments appear as their own lines, and your markup appears separately as a percentage and a per-item fee. You can verify all of it.
On a tiered statement, you will see qualified, mid-qualified and non-qualified volume at three different rates and no interchange detail whatsoever. There is nothing to verify, because the processor's classification decisions are invisible. If your statement looks like this, that is the finding.
The fee lines worth understanding
Some monthly charges are legitimate cost. Others exist because most merchants never ask. Learn to tell them apart:
- PCI non-compliance fee — a real charge for a real obligation you have not completed. It should be zero, because the questionnaire should be done
- Annual fee — pure margin in most cases, and negotiable or removable
- Statement fee — charging you to receive a document you can download
- Batch fee — a per-day charge for closing your own batch
- Monthly minimum — a floor that quietly makes a low-volume month expensive
- Gateway fee — legitimate software cost, but it should be its own line, not folded into your rate
- Regulatory or network access fee — sometimes real pass-through, sometimes a relabeled markup. Ask which
Look for downgrades
If your statement shows interchange detail, scan for categories with names containing standard, EIRF or data rate. Those are downgrades: transactions that could have qualified for a cheaper category and did not.
Common causes are missing AVS on keyed transactions, late settlement, and commercial cards submitted without Level 2 or Level 3 data. Every one of those is a configuration problem, not a pricing problem, and fixing it costs nothing.
Three months, not one
One statement is a snapshot. Three shows you the pattern. A stable effective rate on stable card mix means honest pricing. A rate that drifts upward month over month means your classification is being adjusted, and nobody sent you a letter about it.
Bring three months to any rate comparison. Anyone who only wants to see your best month is building a quote you cannot hold them to.