There’s a new kind of defined retirement plan on the market, but you may have to ask your employer to add it to your current plan. In 2001, Congress passed the Economic Growth and Tax Relief Reconciliation Act (EGTRAA), which provided a variety of changes, adjustments and extensions to rules for retirement plans to be phased in during the ensuing 10 years. Among those provisions was the creation of the Roth 401(k), a hybrid that allowed contributions of after-tax dollars (like a Roth IRA) through salary deferral up to $15,000 (2006 limit) with a $5,000 catch-up allowed for people over age 50 (like a 401(k) plan.)