Calculate your tax-free Roth IRA balance at retirement. See how much you will have and how much tax you will save vs a Traditional IRA.
A Roth IRA is funded with after-tax dollars, meaning your contributions do not reduce your taxable income today. But all growth and qualified withdrawals in retirement are completely tax-free. A Traditional IRA gives you a tax deduction now but you pay taxes on withdrawals in retirement.
Roth wins if you expect to be in a higher tax bracket in retirement. Traditional wins if you expect a lower tax bracket in retirement. For most young earners, Roth is the better choice.