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Understanding the Roth IRA

A Roth IRA is an Individual Retirement Account that provides tax-free growth. As a result, it's the simplest - and potentially the most effective - sheltered account imaginable.

The Roth Tax Advantage

Like a deductible IRA, Roth gives you the advantage of getting taxed only once, rather than twice (or more) as with a regularly-taxed investment account. Here is a summary of how it works:

 

Regularly-Taxed Account Deductible IRA Roth IRA
You pay income tax, and then make your contribution with post-tax dollars

Your principal may be subject to taxes on dividends and capital gains as it grows

You pay capital gains tax on your gain at withdrawal

You get a tax deduction, essentially letting you deposit pre-tax dollars

Your principal grows tax-free
 
 

You pay income tax on the entire amount of your withdrawal

You pay income tax, and then make your contribution with post-tax dollars

Your principal grows tax-free
 
 

You pay no further taxes on withdrawal.


 

The advantage of a Roth IRA over a regularly-taxed account is obvious. Either way you pay income tax up front. But with Roth, you're then done paying taxes; with a regular account you're just getting started.

The advantage of a Roth IRA over a deductible IRA is almost obvious:

  • Roth is simple: it requires no special reporting to the IRS. (With a deductible IRA you have to report a deduction on your 1040 form when you make a contribution; on withdrawal you report the entire withdrawal amount as taxable income.)

  • Roth is flexible: because you've taken care of your tax obligations up front you tend to face fewer restrictions later. (For example, you don't need to begin withdrawing your money by a set age; with a deductible IRA you're required to start making withdrawals by age 70½.)

  • Roth has an extra advantage if you think taxes will probably rise in the future, since you're paying now rather than later. (Of course that's a disadvantage if you think taxes will fall.)

  • Roth has an additional, somewhat confusing advantage that it lets you shelter more real money: the same dollar amount, but in post-tax, rather than pre-tax dollars. (The idea is that a tax deduction isn't "money you're getting back"; it's "money you aren't sheltering".) This issue is analyzed, in more detail than you probably want to see, in a sidebar article.

 

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Article Contents
Roth Intro
Rules & Eligibility
Opening an Account
Calculator

Article Contents
Roth vs. Deductible