Merchant statements are notoriously hard to parse — dense tables, unfamiliar abbreviations, and fee lines that don’t explain themselves. Here’s how to find the numbers that actually tell you what you’re paying.
Start with total volume and total fees
Ignore every individual line for a moment and find two numbers: total dollar volume processed, and total fees charged. Divide fees by volume and multiply by 100 — that’s your effective rate. This single number is the fastest way to compare statements across months, or against a competing quote.
“Your effective rate is the only number on the statement that can’t lie to you.”
Separate interchange from markup
On an Interchange-Plus statement, interchange (the cost set by the card networks) should be broken out from your processor’s markup. If your statement only shows one bundled percentage per transaction, you’re likely on a flat-rate or tiered plan, and you can’t actually verify what your processor is keeping.
Watch for recurring fees below the transaction lines
Monthly minimum fees, PCI compliance fees, statement fees, batch fees, and annual fees usually sit in a separate section near the bottom. None of these move with your sales volume, so they hit hardest in slower months — add them up over a year, not just a month, to see their real impact.
Check the transaction count against your own records
Occasionally a duplicate batch or a processing error inflates the transaction count. Spot-checking your statement’s transaction total against your own POS reports once a quarter catches this before it becomes a pattern.
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