Indiana may soon raise smoking age to 21, tax e cigarette materials How Old Do You Have to Be to Vape? Vaping360 8 in 10 Support raising the minimum age to purchase tobacco products, e cigarettes, and vaping devices to 21 Tobacco 21 Just a reminder, the minimum age to buy nicotine products in Indiana is 21. This means retailers are prohibited from selling cigarettes, e liquids, and e cigarettes to anyone under age 21. We Proposal would lift legal age to purchase e cigarettes from 18 to 21