Definition
What “lowest fees” really means
Lowest fees means the lowest total cost for your sales over a real period, usually expressed as your effective rate. A provider with a lower percentage but a higher fixed fee can cost more for a store with many small orders. A provider with no monthly fee can cost more for a high volume store than one with a membership fee and a small markup.
That is why lists of the cheapest processors only go so far. They are a starting point for quotes, not an answer.