This description outlines the benefits of investing in a Roth IRA. A Roth IRA is a retirement savings account that allows you to save money on a tax-free basis. Contributions to a Roth IRA are made with after-tax dollars, meaning you will not pay taxes on the money when you withdraw
From Wikipedia
A Roth IRA is an individual retirement account (IRA) under United States law that is generally not taxed upon distribution, provided certain conditions are met. The principal difference between Roth IRAs and most other tax-advantaged retirement plans is that rather than granting an income tax reduction for contributions to the retirement plan, qualified withdrawals from the Roth IRA plan are tax-free, and growth in the account is tax-free.