Roth IRA - Named for Delaware Senator William Roth and established by the Taxpayer Relief Act of 1997, a Roth IRA is an individual retirement plan (a type of qualified retirement plan) that bears many similarities to the traditional IRA. The biggest distinction between the two is how they’re taxed.
Traditional IRA contributions are generally made with pretax dollars; you pay income tax when you withdraw the money from the account during retirement. Conversely, Roth IRAs are funded with after-tax dollars; the contributions are not tax deductible (although you may be able to take a tax credit of 10 to 50% of the contribution), depending on your income and life situation). But when you start withdrawing funds, qualified distributions are tax free. Source: Investopedia