What is Roth IRA?
A Roth IRA is a retirement account funded with after-tax money, where qualified withdrawals in retirement are completely tax-free.
How it works
You get no deduction going in, but everything — including decades of growth — comes out tax-free after age 59½, assuming the account is at least five years old. There are also no required minimum distributions for the original owner, so it can keep growing untouched.
A quick example
What people get wrong
High earners who are phased out of direct Roth contributions can often still use a "backdoor" Roth. And Roth accounts are ideal for young savers, whose long runway makes tax-free growth enormously valuable.