Roth 401 (k) Overview:

On January 1, 2006, employees can choose to make their 401(k) contributions on either a pre-tax or an after-tax basis or a combination of the two. The contribution limits which apply to these 401(k) contributions made in 2006 (whether made pre-tax or after-tax or both) are:

1. $15,000 under the basic limit, plus,
2. $5,000 additionally for employees who are age 50 or older.