There is no one-size-fits-all answer to the question of how much money to keep in an emergency kit, as the amount needed can vary depending on a number of factors such as the size of your family, the cost of living in your area, and the duration of the emergency. However, it is generally recommended that you keep at least a small amount of cash on hand in your emergency kit, as ATMs and credit card machines may not be operational during an emergency. The Federal Emergency Management Agency (FEMA) recommends that you keep small bills and coins in your emergency kit. Which can help cover immediate expenses such as food, gas, and other necessities in the event of a disaster.