Comment by cmurf

Surcharges are permitted in some states.

Colorado law recently changed permitting merchants to pass on the actual cost of processing, except for cash, check and debit payments.

https://colorado.public.law/statutes/crs_5-2-212

This law overrides any prior contractual agreements with banks/processing companies that prohibit surcharges. This is previously how MasterCard and VISA coerced merchants into absorbing the processing fee, by contractually requiring credit same as cash pricing.