How long does your bac rise after you have your last drink?

Blood alcohol concentration (BAC) typically rises within about 30 to 90 minutes after consuming alcohol, depending on various factors such as the type and amount of alcohol consumed, food intake, and individual metabolism. After your last drink, BAC can continue to increase for a short time, especially if the drink was consumed quickly or on an empty stomach. It's important to note that even after drinking stops, BAC can remain elevated for several hours as the body metabolizes the alcohol.