What Is a Roth IRA?

What is a Roth IRA?

A Roth IRA (Individual Retirement Account) is a special type of retirement savings account in the United States that allows your money to grow completely tax-free. You contribute after-tax dollars — meaning you pay income tax on the money before depositing it — but in return, every dollar you withdraw in retirement is 100% tax-free, including all the investment growth. You can practice these concepts with our interactive Roth IRA Word Search.

The Roth IRA was created by the Taxpayer Relief Act of 1997 and is named after Senator William Roth of Delaware, who championed the legislation. Unlike traditional IRAs or 401(k) plans, Roth IRAs have no required minimum distributions (RMDs) during your lifetime, meaning you can let the money compound indefinitely if you don't need it.

How it works — tax-free growth explained

The power of a Roth IRA comes from two things working together: tax-free compounding and time.

In a normal taxable brokerage account, you pay capital gains taxes every year on dividends and realized gains. This annual tax drag slows compounding significantly over time. In a Roth IRA, there is no annual tax drag — every dollar of growth stays invested and continues compounding. Over decades, this difference becomes enormous.

Real example: Suppose you invest $100,000 in an S&P 500 index fund. In a Roth IRA earning 8% annually for 30 years, that $100,000 grows to approximately $1,006,000 — all tax-free. In a taxable account subject to 15% capital gains tax on annual returns, the same investment grows to roughly $790,000 after taxes. The Roth IRA produces $216,000 more from the exact same investment, purely through tax-free compounding.

2025 Contribution Limits

The IRS sets annual limits on how much you can contribute to a Roth IRA. For 2024, the limits are:

Important rules to know:

• You can contribute to a Roth IRA and a 401(k) in the same year — they have separate limits.
• Your total contributions across all IRAs (Roth + Traditional) cannot exceed the annual limit.
• You must have earned income (wages, salary, self-employment) equal to or greater than your contribution amount.
• You can contribute to a Roth IRA at any age, including after 70½ (unlike the old Traditional IRA rule).
• The deadline to contribute for a given tax year is April 15 of the following year.

Income Limits and Phase-Outs

Not everyone can contribute the full amount to a Roth IRA. Eligibility is based on your Modified Adjusted Gross Income (MAGI):

If your income falls within the phase-out range, you can make a partial contribution. If your income exceeds the upper limit, you cannot contribute directly — but you may be able to use the backdoor Roth strategy (see below).

Withdrawal Rules

Roth IRA withdrawals are governed by two separate rules — one for contributions and one for earnings:

Contributions (your deposited money)

You can withdraw your contributions at any time, at any age, with no taxes and no penalties. Because you already paid tax on them, they're yours to take out freely. This is one of the Roth IRA's most underappreciated features — it can double as an emergency fund for contributions.

Earnings (investment growth)

To withdraw earnings tax-free and penalty-free, two conditions must both be met:

1. You must be age 59½ or older
2. The Roth IRA must have been open for at least 5 years (the "5-year rule" starts January 1 of the year you made your first contribution)

If you withdraw earnings early (before meeting both conditions), you'll owe income tax plus a 10% early withdrawal penalty on the earnings — not the contributions.

Roth IRA vs. Traditional IRA

General rule of thumb: Choose a Roth IRA if you expect to be in a higher tax bracket in retirement than you are now. Choose a Traditional IRA if you expect to be in a lower tax bracket. When in doubt, many financial advisors recommend the Roth for younger workers, since decades of tax-free growth typically outweigh the short-term deduction benefit.

The Backdoor Roth Strategy

If your income exceeds Roth IRA limits, you can still access Roth benefits through the backdoor Roth — a two-step legal strategy:

1. Make a non-deductible contribution to a Traditional IRA (no income limit applies)
2. Immediately convert that Traditional IRA to a Roth IRA

Because you contributed after-tax money in step 1, the conversion in step 2 triggers little to no additional tax. The result: full Roth IRA benefits despite exceeding the income limit.

How to Open a Roth IRA

Opening a Roth IRA takes about 15 minutes online. Here are the steps:

1. Choose a brokerage. Popular options include Fidelity, Vanguard, Charles Schwab, and Betterment. Look for no account minimums, no annual fees, and access to low-cost index funds.
2. Verify your eligibility. Confirm your MAGI is within the income limits for your filing status.
3. Open the account. Select "Roth IRA" during account setup. You'll need your Social Security number, bank account details, and basic personal information.
4. Fund the account. Transfer money from your bank account. You can contribute up to $7,000 for 2024 ($8,000 if 50+).
5. Choose your investments. Most beginners do well with a single low-cost index fund — such as a Total Market Index Fund or an S&P 500 fund — or a target-date retirement fund that automatically adjusts your asset allocation as you age.

Frequently Asked Questions

Can I have both a Roth IRA and a 401(k)?

Yes. They are completely separate accounts with separate contribution limits. Many financial advisors recommend contributing enough to your 401(k) to capture the full employer match first, then maxing out your Roth IRA, then contributing more to the 401(k) if you have remaining savings capacity.

What happens to my Roth IRA when I die?

Your named beneficiary inherits the account. Non-spouse beneficiaries must generally distribute the full account within 10 years under SECURE Act 2.0 rules — but all distributions remain completely income-tax-free, making the Roth IRA one of the most valuable assets to leave to heirs.

Can I contribute to a Roth IRA for my child?

Yes, if your child has earned income (from a job, self-employment, etc.). A custodial Roth IRA for a working teenager is one of the most powerful financial gifts possible — decades of tax-free compounding from a young age is extraordinary.

Is the Roth IRA always better than a Traditional IRA?

Not necessarily. If you're in a high tax bracket now and expect a significantly lower bracket in retirement, the Traditional IRA's upfront deduction may be more valuable. The right choice depends on your current income, expected retirement income, and individual tax situation.

A Real-World Roth IRA Example: Tax-Free Compounding in Action

Priya opens a Roth IRA at age 24 and contributes $500/month ($6,000/year) until she maxes out the annual limit. She invests in a total stock market index fund. Here's the scenario at retirement at 65:

The numbers: 41 years of contributions. Total contributed: approximately $287,000 (increasing contributions as limits rise). Assumed 7% average annual return. Estimated balance at 65: approximately $2,100,000.

The Roth IRA advantage: Every dollar of that $2.1 million is withdrawn completely tax-free. Compare to a traditional IRA with the same balance: withdrawing $84,000/year (4% rule) in traditional IRA funds generates approximately $14,700 in federal income taxes annually — $441,000 in taxes over a 30-year retirement.

The early contribution bonus: Priya contributed $6,000 at age 24. That single year's contribution, left untouched for 41 years at 7%: $6,000 × (1.07)^41 = approximately $92,000 — all tax-free. The same $6,000 contributed at age 44 (20 years later) grows to only $23,200. The early $6,000 is worth $68,800 more purely because of time.

The access advantage: At age 35, Priya faces an emergency. She contributed $66,000 to her Roth IRA over 11 years. She can withdraw up to $66,000 of contributions (not earnings) at any time, tax and penalty-free, if absolutely necessary — something no other retirement account allows. She doesn't need to, but the optionality has real value.