Roth IRA Explained: How It Works, Limits & Rules

Most people hear "retirement account" and tune out. Fair enough. But the Roth IRA is one of the few money moves where the rules actually favor regular savers — not just folks with a tax attorney on speed dial. Here's the short version: you put in money you've already paid taxes on, it grows for decades, and when you pull it out in retirement, the IRS doesn't take a cent. That's the whole trick. No tax on the growth. None on the withdrawals.

If you're in your 20s, 30s, or even 40s with income from a job, this is probably the account to understand before any other. Below: how a Roth IRA works, who's allowed to open one, the 2026 contribution and income limits, and the withdrawal rules that trip people up.

How a Roth IRA works (and why the tax break is backwards)

A traditional retirement account — your 401(k), a traditional IRA — gives you the tax break now. You contribute pre-tax dollars, your taxable income drops this year, and you settle up with the IRS later when you withdraw. A Roth flips that. You pay tax on the money before it goes in. Then it grows untouched. And every dollar it earns over the next 30 or 40 years comes out tax-free.

Picture $7,000 a year going into a Roth, earning roughly 7% annually. After 30 years that's around $700,000 — and you'd owe nothing on the gains. Run the same numbers yourself with our compound interest calculator and you'll see why time matters more than the amount. In a regular brokerage account, those gains get taxed every time you sell. The Roth skips all of it.

So why call it backwards? Most tax advice says defer — pay later, not now. The Roth does the opposite on purpose. It bets that paying tax on the seed is cheaper than paying tax on the harvest. For a young earner in a lower bracket today, that bet usually pays off. We broke down the math of growth over time in Compound Interest Made Simple if you want the formula behind it.

Who can contribute — 2026 income and limit rules

Two things decide whether you can fund a Roth: earned income, and how much you make.

You need a paycheck. A job, a side gig, self-employment — that counts. Money from investments or rent doesn't. No earned income, no Roth contribution.

Then there's the cap. For 2025 the limit sat at $7,000 a year, or $8,000 if you're 50 or older. The IRS nudges these up for inflation, so check the current year's number before you max out — 2026's figure may be a touch higher.

High earners hit a second wall: income phase-outs. Make too much and your allowed contribution shrinks, then vanishes. In 2025, single filers started phasing out near $150,000 of modified adjusted gross income and were fully cut off around $165,000. For married couples filing jointly, the band ran roughly $236,000 to $246,000. Past that, the front door closes — though there's a side door called a backdoor Roth that high earners use, which is a whole separate conversation.

One detail people miss. You can contribute for the prior tax year right up until the April filing deadline. Forgot to fund 2025? You've usually got until mid-April 2026.

Roth IRA vs traditional IRA: which one wins?

Honestly? It comes down to one question — do you expect a higher or lower tax rate in retirement than you pay right now?

Lower rate later, and the traditional IRA tends to win. Take the deduction now while your bracket's high, pay tax later when it's lower. Higher rate later, or you just can't predict, and the Roth pulls ahead. You lock in today's tax rate and never think about it again.

There's also a quiet advantage nobody mentions: a Roth has no required minimum distributions during your lifetime. A traditional IRA forces you to start pulling money out at 73 whether you need it or not. The Roth lets it sit and compound as long as you like — which makes it a clean way to leave money to your kids.

For most people early in their careers, the Roth is the easier call. Your income, and your bracket, will probably climb. And there's inflation to factor in too — tax-free dollars decades from now are worth protecting, as our inflation calculator makes uncomfortably clear. Paying the tax now, at the lower rate, is usually the smart move. If you're trying to pin down your actual number, How Much Money Do You Need to Retire? walks through it.

Getting your money out: withdrawal rules people get wrong

This is where folks panic for no reason.

Your contributions — the money you put in — can come out anytime. Any age. No tax, no penalty. It's already been taxed, so the IRS has no claim on it. That makes a Roth a surprisingly flexible emergency backstop, even if raiding retirement should stay a last resort.

The earnings are stricter. To pull those out clean, two boxes have to be checked: you're at least 59½, and the account's been open at least five years. Miss either and the growth portion can get taxed plus a 10% penalty. A few exceptions exist — a first home (up to $10,000), certain medical costs, disability — but the rule of thumb is to leave the gains alone until you qualify.

That five-year clock matters more than people think. It starts the year of your first contribution, not when you turn 59½. So opening a Roth with even a small amount in your 20s quietly starts the timer.

And here's the part that makes the Roth genuinely different: those tax-free gains. When you sell investments in a normal account, you owe capital gains tax on the profit. Inside a Roth, that bill disappears. Forty years of growth, zero tax on the way out.

FAQ

Is a Roth IRA worth it?

For most people with earned income and a few decades until retirement, yes. You trade a tax bill today for completely tax-free growth and withdrawals later. The earlier you start, the more those years of untaxed compounding stack up in your favor.

How much can I put in a Roth IRA?

$7,000 for 2025, or $8,000 if you're 50 or older. The IRS adjusts the limit for inflation, so confirm the current year's cap. High earners may be limited or shut out entirely by the income phase-out rules.

Can I lose money in a Roth IRA?

Yes — a Roth IRA is a wrapper, not an investment itself. What you hold inside it (index funds, stocks, bonds) can rise or fall. Over long stretches a diversified portfolio has historically trended up, but nothing's guaranteed.

What's the difference between a Roth IRA and a 401(k)?

A 401(k) comes through your employer and often includes a match. A Roth IRA you open yourself, with more investment choice but a lower contribution limit. Plenty of people use both — grab the full 401(k) match first, then fund a Roth.

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This is general education, not financial advice. Tax rules shift and your situation is your own — confirm current limits with the IRS or a fee-only advisor before acting.