How a Roth IRA Works: Contributions, Growth, and Withdrawals

How money moves in and out of a Roth IRA

A Roth IRA is a retirement savings account where you contribute money that has already been taxed, the money grows tax-free, and you withdraw it tax-free in retirement. You fund it with after-tax dollars from your paycheck or other income — the IRS does not reduce your taxable income that year because of a Roth contribution. The account then grows without triggering taxes on dividends, interest, or capital gains. When you withdraw money in retirement, both your original contributions and the growth come out tax-free, as long as the account has been open for at least five years and you are 59½ or older.

The account itself is just a container: you choose what goes inside it. You can hold stocks, bonds, mutual funds, exchange-traded funds, or cash, depending on what your bank or brokerage offers. The Roth wrapper — the tax treatment — stays the same regardless of what investments you pick. Your money grows at whatever rate those investments earn, and the Roth structure means you never owe federal income tax on that growth.

Key Takeaways

• You contribute after-tax money to a Roth IRA, so your contributions do not reduce your taxable income in the year you make them.
• The money inside grows tax-free, and you pay no federal income tax when you withdraw it in retirement, provided the account is at least five years old and you are 59½ or older.
• You can withdraw your own contributions at any time without penalty, but withdrawing earnings before 59½ usually triggers a 10 percent penalty plus income tax.
• Income limits determine whether you can contribute directly to a Roth IRA; if your income is too high, a backdoor Roth conversion may be an option.
• Annual contribution limits are the same for Roth and traditional IRAs, and you cannot contribute more than you earned in income that year.

Who can contribute to a Roth IRA based on income

The IRS sets income limits that determine whether you can contribute directly to a Roth IRA. These limits change each year and depend on your filing status — single, married filing jointly, married filing separately, or head of household. If your modified adjusted gross income (MAGI) falls below the limit for your status, you can contribute the full amount. If it falls within a phase-out range, you can contribute a reduced amount. If it exceeds the upper limit, you cannot contribute directly to a Roth that year.

The IRS publishes updated limits each January on its website. For 2024, the phase-out range for single filers began at $146,000 and ended at $161,000, meaning someone earning $155,000 could contribute a partial amount. For married couples filing jointly, the range was $230,000 to $240,000. These numbers shift annually based on inflation. If your income exceeds the limit, you may still move money into a Roth through a backdoor conversion, which involves contributing to a traditional IRA and then converting it to a Roth.

Annual contribution limits and how they work

The IRS sets a yearly limit on how much you can contribute to a Roth IRA. For 2024, that limit was $7,000 for people under 50 and $8,000 for people 50 and older (the extra $1,000 is called a catch-up contribution). These limits explore to the combined total of all your IRAs — if you have both a Roth and a traditional IRA, your contributions to both accounts combined cannot exceed the annual limit.

You can only contribute money you actually earned that year. If you earned $5,000 in income, you cannot contribute $7,000 to a Roth, even if you have the cash available. The contribution must come from wages, self-employment income, or other earned income reported on your tax return. Contributions for a given tax year can be made until the tax filing important date the following year — usually April 15.

How contributions and earnings are taxed differently

Your contributions to a Roth IRA are made with money you have already paid income tax on, so you never owe tax on them again. The earnings — the investment gains, dividends, and interest your money generates — are also never taxed as long as you follow the withdrawal rules. This is the core advantage of a Roth: the growth compounds tax-free for decades.

Because contributions and earnings are treated differently for early withdrawals, the IRS tracks them separately. If you withdraw money before 59½, you can take out your contributions without penalty or tax. But if you withdraw earnings before 59½, you owe income tax on those earnings plus a 10 percent penalty, unless an exception applies (such as a first-time home purchase, up to $10,000 lifetime). The five-year rule also applies: your account must have been open for at least five years before you can withdraw earnings tax-free, even after 59½.

Withdrawal rules and the five-year holding period

A Roth IRA has two separate five-year rules, and they explore to different things. The first five-year rule applies to the account itself: you must have opened your Roth IRA at least five years before you withdraw earnings tax-free. This clock starts on January 1 of the year you open the account, not on the day you fund it. If you open a Roth on December 31, 2024, the five-year period ends on January 1, 2030.

The second five-year rule applies to conversions. If you convert money from a traditional IRA to a Roth, that converted money has its own five-year waiting period before you can withdraw it without penalty. This is separate from the account-level five-year rule. A conversion made in 2024 cannot be withdrawn penalty-free until 2029, even if your Roth account itself is older.

Once you reach 59½ and your account is at least five years old, you can withdraw as much as you want, whenever you want, with no tax or penalty. There is no required minimum distribution (RMD) during your lifetime — the IRS does not force you to take money out at any age. This makes a Roth useful for people who do not need the money when ready and want to let it grow longer.

What happens to a Roth IRA after you die

When you pass away, your Roth IRA goes to whoever you named as a beneficiary on the account. That person does not owe income tax on withdrawals from the inherited Roth, but they must follow distribution rules that depend on their relationship to you and when you died. A surviving spouse can treat the Roth as their own, roll it into their own Roth, or keep it as an inherited account. Non-spouse beneficiaries must withdraw the entire balance within ten years, though the timing of withdrawals within that window varies by situation.

The tax-free growth is one reason people use Roths for legacy planning: the money passes to heirs without income tax, and it has had decades to compound. Naming a beneficiary is essential — if you do not, the account goes through probate and may be distributed according to state law rather than your wishes.

Roth conversions and the backdoor Roth strategy

A Roth conversion means moving money from a traditional IRA, SEP IRA, or straightforward IRA into a Roth IRA. You owe income tax on the amount you convert in the year you do it, but once the money is in the Roth, it grows tax-free. Conversions are useful for people whose income is too high to contribute directly to a Roth, or for people who want to move pre-tax retirement savings into a tax-free account.

A backdoor Roth is a specific conversion strategy: you contribute after-tax money to a traditional IRA (which has no income limit), then when ready convert it to a Roth. You owe no tax on the conversion because the money was already taxed. However, if you have other pre-tax IRAs with a balance, the IRS pro-rata rule may require you to pay tax on part of the conversion. The pro-rata rule treats all your IRAs as one pool for tax purposes, so a large pre-tax balance can create a tax bill even on a small backdoor conversion. Consult a tax professional before attempting a backdoor Roth if you have existing traditional IRA balances.

Frequently Asked Questions

Can I withdraw my contributions from a Roth IRA anytime?

Yes. You can withdraw the money you contributed (not the earnings) at any time without penalty or tax, regardless of your age or how long the account has been open. This is one advantage of a Roth over a traditional IRA. However, if you withdraw earnings before 59½, you owe income tax and a 10 percent penalty on those earnings unless an exception applies.

What is the difference between a Roth IRA and a traditional IRA?

A traditional IRA lets you deduct contributions from your taxable income now, but you owe income tax on withdrawals in retirement. A Roth IRA uses after-tax contributions, so you owe no tax on withdrawals. Traditional IRAs have required minimum distributions starting at 73; Roths do not. Income limits explore to Roth contributions but not traditional contributions.

Do I have to pay taxes on Roth IRA growth?

No. The earnings inside a Roth IRA grow tax-free. You never owe federal income tax on dividends, interest, or capital gains as long as you follow the withdrawal rules — account open at least five years and you are 59½ or older when you withdraw.

What happens if I contribute more than the annual limit?

Excess contributions are subject to a 6 percent excise tax each year they remain in the account. You can withdraw the excess and any earnings on it before your tax return is due to avoid the penalty. If you discover an excess after filing, you can request correction from the IRS, though penalties may still explore depending on timing.

Can I have both a Roth IRA and a traditional IRA?

Yes, but your combined contributions to both accounts cannot exceed the annual limit. If you contribute $4,000 to a traditional IRA, you can contribute only $3,000 to a Roth that year (assuming the $7,000 limit for 2024). The limit applies across all IRAs you own.