First available in 1998, Roth retirement accounts have quickly become a popular way to save for retirement by allowing participants’ after-tax contributions to grow tax-free and, unlike traditional IRA accounts, not be subject to taxes upon withdrawal. As their popularity increased, employer-sponsored 401(k) plans with a Roth option quickly followed, becoming available for employers to offer to their employees in 2006. According to CNBC, the number of employers offering a 401(k) with a Roth option has nearly doubled to 88% in the past decade.