1. Time spent by staff counting and reconciling cash after close of business or at the end of a shift
2. Time spent on bank runs or on an armoured car service that picks up your cash and deposits it at the bank
3. Banks actually charge businesses cash-handling fees for both providing and receiving large quantities of coins
4. Safes and other security mechanisms for keeping cash on your premises
5. Higher insurance premiums when you have lots of cash on hand
Businesses that completely eliminate cash also eliminate these costs.
The cash (notes) is deposited by putting it in a machine at the bank. I guess withdrawals of cash are so small now that they want to restrict inputs of cash to avoid their own handling costs.
Large chunks of the US still operate primarily in cash to avoid these fees and presumably some taxes, SoCal is a good example of an area where using credit is often discouraged (even Kroger is not accepting Visa!).
It's a massive problem for businesses with lots of small transactions, if you're selling a £2 coffee and the CC processor charges 30p + 5% per transaction. Previously nearly no-one would pay the extra, now you have to cover it; so you make the coffee £2.40 ... but the large retailer with a blanket 3% transaction cost (or whatever) can undercut you by quite a lot.
https://www.theguardian.com/money/2018/jun/17/credit-debit-c...