Roth IRA
A Roth IRA is a US individual retirement account funded with money you have already paid taxes on. Your investments grow tax-free, and qualified withdrawals in retirement are completely tax-free. It is especially powerful if you expect to be in a higher tax bracket later in life.
Example
Contributing $7,000 per year from age 30 to 65 at a 7% return builds roughly $1 million — and every withdrawal is tax-free.