For a successful Stripe payment processed through M&M POS, the standard M&M POS app fee is 1% of the payment amount. Stripe charges its own processing fee as well. These fees are deducted through Stripe; the app fee is not a separate monthly subscription.
For example, the M&M POS app fee on a $100 payment is $1. Stripe's processing fee is added to that cost. There is no single combined rate for every payment: the country, card, payment method, and Stripe account can change it. Check Stripe's current pricing for your country.
The 1% app fee does not apply to cash or payments processed outside this Stripe integration. An outside payment provider can still charge its own fees.
Extra Stripe services can have their own fees too. For example, check Stripe Billing pricing if you use recurring billing. Your Stripe account's terms show which charges apply.
These payment fees are not the same as a fee you choose to charge a buyer. See Fees Management for store-added fees.