Consider the transactions, people, and routines at your counter.
01
Look at the complete basket.
Compare costs using your actual mix of smaller purchases and larger baskets. A flat fee and a percentage-based fee can affect those transactions differently. Ask for the full customer and merchant cost, not just a headline rate.
02
Keep payment and retail controls connected.
Age checks, inventory, taxes, and store return policies still need a reliable workflow. Establish whether staff must enter the amount in two systems and how a mistaken amount is corrected.
03
Plan for the end of the day.
A useful evaluation includes sample receipts, daily reporting, deposit timing, and a process for investigating discrepancies. Confirm who handles a payment issue when the store is busy.
Eligibility depends on the business, location, and specific processing arrangement.