Iced tea’s caffeine content varies depending on the type of tea used. Black iced tea is highest in caffeine, with typically 15-45 mg of caffeine per 8-ounce cup. Green iced tea has moderate caffeine levels of 20-40 mg per eight ounces, while herbal and fruit iced teas are caffeine-free. Factors like tea type, brewing time, and serving size can influence caffeine content. Consider your caffeine sensitivity when consuming iced tea.