[ses1984]

Small businesses put in sweat equity to handle cash payments, like the owner going to the bank to make a deposit. If they had to pay an hourly employee to do that, it might even out with credit card processing fees. Also small businesses can fudge numbers with cash payments in a way that’s a lot harder to do when some other company keeps a record of all of your cc transactions.

[ta1243]

Yup, cash handling costs are significant when done as a service, they can be cheaper if you don't account for the time and risk (of both theft and forgery). Banks in the UK typically charge about 0.6-0.8% to pay cash in for large companies, and even more for small ones, and very few locations will take cash.

However nothing beats that sweet sweet tax evasion that cash allows.