Disclosed is a cash security system for a retail store that includes a cash cart, a base station, a key, and a cart detector. The cash cart includes a wheeled cart body, a cash box, and a cart security module. The cash cart is used to carry cash within the retail store. The cart security module includes a number of security devices and modules that track where the cash cart is in the retail store, and activates alarms if a problem is detected. The base station includes a base station security module with a number of security devices and modules that concurrently track the movement and location of the cash cart. The cart detector, the cart security module, and the base station security module each activate a security alarm if a security issue with the cash cart is detected.