Small fees the card networks (Visa, Mastercard, etc.) charge on every transaction, separate from interchange. Like interchange, they are set by the networks and passed through by every processor.
Why it matters for your business
Terms like Assessment fees aren't just jargon — they sit behind what you actually pay to accept payments. Understanding them is the difference between reading your statement and being at the mercy of it. If you're not sure how this shows up in your own costs, the fastest way to find out is to have someone read your statement line by line.
See what you're really paying →Related — Pricing & Fees