If you choose to start accepting credit cards you will be handling less cash which should ultimately mean less cashing up and less trips to the local bank for paying in. It will allow more time to be focused in-house. If you introduce a card machine there is no need to count out money, and the end of day banking on a handset typically takes less than 30 seconds.
Accepting card payments is much faster than taking traditional cash payments or accepting dated cheque. With a card machine, your customer simply enters their PIN number or pays using the pay and and wave contactless technology which means there is no need to count out change thus eliminating potential errors.