Techniques for proximity detection of kiosk payments are provided. A kiosk system includes a cash/coin acceptor device and an added sensor. The sensor detects when a hand of a customer is in proximity to the cash/coin acceptor device indicating cash or coins are about to be inserted into the device. The sensor coordinates with a state of the kiosk system and when the state permits and the hand is in proximity to the device, the device is activated or enabled to accept the cash or coins for a transaction of the customer.