Roth IRA, explained in 10 minutes

A Roth IRA is one of the more useful retirement accounts available to people in their 20s and 30s. The rules look complicated. The math is not. Here’s the whole thing.

What it actually is

A Roth IRA is a personal retirement account opened directly with a brokerage like Fidelity, Schwab, or Vanguard. It is not the same as a 401(k). A 401(k) comes through an employer. A Roth IRA is set up on the account holder’s own.

Once it’s open, money goes in (the “contribution”). Then that money is invested inside the account, usually in an index fund or ETF that holds hundreds or thousands of companies. The investments grow over decades. Decades later, when the money is taken out in retirement, no tax is owed on any of it. Not on the contributions. Not on the growth. Not on the withdrawals.

The trade-off: the money going in has already had income tax paid on it. The IRS gets paid on the seed. They never get paid on the harvest.

Why this is such a good deal

Many people in their 20s and 30s are in a lower tax bracket than they’ll be later in their career. Paying tax now (at, say, 12% or 22%) and skipping it forever is often a much better deal than getting a tax break now and being taxed at retirement-era rates on a much bigger pile.

Run the numbers: $7,500 contributed at age 30, never touched again, earning a steady 7% per year, becomes about $80,100 at age 65. In a regular brokerage account, capital gains tax would be owed on the $72,600 of growth, anywhere from $10,900 to $14,500 in tax, depending on bracket. In a Roth, that tax bill is zero.

The 2026 limits

• Contribution limit: $7,500 per year. For age 50 or older, $8,600 (the standard $7,500 plus a $1,100 catch-up)^[1].
• Earned income required. A contribution is only allowed up to the lesser of $7,500 or what was actually earned from working. A spouse with no income can use a “spousal” Roth IRA based on the working spouse’s earnings.
• Income limits. Above a certain income, direct Roth contributions phase out. The phase-out starts at $153,000 of modified adjusted gross income (MAGI) for single filers and heads of household, and at $242,000 for married filing jointly. Above $168,000 single / $252,000 joint, direct contributions are not allowed (though there’s a legal workaround called a “backdoor Roth”, a topic for another lesson)^[2].
• Deadline: Contributions for the 2026 tax year can be made all the way up until the April 2027 tax filing deadline. No need to rush in December.

The two rules for taking money out tax-free

Roth IRAs have a friendly quirk: contributions can come back out at any time, for any reason, with no tax and no penalty. Tax has already been paid on that money, so the IRS has no claim on it.

The growth is different. To pull out growth tax-free and penalty-free, two things have to be true:

1. The account holder is at least 59½, and
2. The account has been open for at least 5 years.

That second one, the 5-year clock, is why finance writers often say “open one as soon as possible, even if the contribution is small.” The clock starts on January 1 of the tax year of the first contribution. Starting it early costs nothing.

What to actually invest in inside the Roth

This is where many beginners get stuck. They open the account, transfer money in, and assume they’re done. They’re not. Cash sitting inside a Roth IRA is just cash. It doesn’t grow until it’s actually invested.

For most beginners, the simplest, most defensible choice is one broad-market index fund or target-date retirement fund. Examples:

• VTI, a Vanguard ETF holding roughly the entire US stock market (~3,600 companies). Annual fee around 0.03%.
• VT, a Vanguard ETF holding the entire global stock market.
• A target-date fund like “Vanguard Target Retirement 2060.” Picks the mix for you and gradually shifts conservative as you age. One fund. Done.

These are not stock picks. They’re “own the haystack instead of looking for the needle.” That’s the approach most personal finance educators recommend for the average person, supported by decades of evidence that most active stock-pickers underperform a plain index fund after fees.

Where the Roth fits in the whole order of operations

For someone trying to decide what to fund first, here’s the standard priority list most personal finance educators recommend:

1. Build a small starter emergency fund (~$1,000).
2. Contribute to a workplace 401(k) up to the full employer match. (Free money beats every other option.)
3. Pay off any high-interest debt: credit cards, payday loans.
4. Build emergency fund to 3-6 months of expenses.
5. Max out a Roth IRA. $7,500 is about $625/month, or $144/week. If that’s too much, contributing what fits the budget, even $50 a month, still starts the 5-year clock and builds the habit.
6. Then go back and contribute more to the 401(k) (above the match, up to the limit).

Common mistakes

• Opening it but not investing the money. Cash in a Roth is still cash. The fund needs to be bought separately.
• Trying to time the market. A recurring monthly contribution and recurring auto-investment is boring, and that’s usually the point. Boring beats clever, almost always.
• Withdrawing growth early. Pulling out contributions is fine. Pulling out growth before 59½ usually means tax plus a 10% penalty. There are exceptions (first home, education, medical), but the cost of an early growth withdrawal is real.
• Picking individual stocks inside the Roth. The Roth is too valuable to use as a casino. Concentrating in broad funds is the standard approach. Speculation, if any, often lives in a separate regular brokerage account.
• Confusing the deadline. The deadline to make a prior-year contribution is tax day of the following year. Lots of people miss this and lose a year of contribution room they can’t get back.

Setting one up this week: the actual steps

1. Pick a brokerage. Fidelity, Charles Schwab, and Vanguard are all fine. None charge to open an IRA. None have account minimums.
2. Open a “Roth IRA” account on their website. It takes about 15 minutes. Social Security number, employment info, and a bank account are required.
3. Link a bank and transfer in a first contribution. Even $25 to start the 5-year clock counts.
4. Invest the cash. Search for a broad index ETF or target-date fund and place a buy order.
5. Set up an automatic recurring contribution and auto-invest. Match the paycheck cycle. Decide once. Forget about it.

Ten minutes to read this lesson. Fifteen minutes to open the account. The decades that follow do the heavy lifting.

What this lesson is NOT

This is not personalized investment or tax advice. Whether a Roth beats a Traditional account depends on your current tax bracket against the one you expect in retirement, and a high earner today can come out ahead deducting a Traditional contribution instead. It is also not a reason to skip an employer 401(k) match, or to invest before paying off high-interest debt and setting aside a starter emergency fund. Income limits apply to direct Roth contributions, and the rules can change.

Spot a mistake in this lesson? Email [email protected].