What Is a Roth IRA? Rules, Limits, and How It Works in 2026
Pay tax on the money going in, then never pay tax on it again. Here's exactly how the rules, limits, and exceptions work.
A Roth IRA is an individual retirement account funded with money you've already paid tax on. In exchange for giving up the upfront tax break you'd get from a traditional IRA or 401(k), your contributions grow completely tax-free — and, once you meet a few basic conditions, you never pay tax on a single dollar of the growth when you withdraw it. That trade-off makes the Roth IRA one of the few genuinely tax-free places to build wealth in the U.S. tax code, which is exactly why the rules around who can use one, and how much, are worth understanding in detail.
1. The core mechanic: pay tax now, never again
Every dollar you put into a Roth IRA has already been taxed as income — there's no deduction for contributing, unlike a traditional IRA or a pre-tax 401(k). In exchange, the money grows tax-deferred while it's invested, and qualified withdrawals in retirement are entirely tax-free, including all the investment growth. If you contribute $7,000 today and it grows to $40,000 over three decades, you owe $0 in federal tax on that $33,000 of growth when you withdraw it, provided you meet the age and holding-period rules covered below.
This is the opposite bet from a traditional account: with a Roth, you're betting your tax rate today is lower than (or similar to) what it will be when you withdraw in retirement. For many people early in their careers, that bet tends to pay off, since income — and often tax rates — typically rise over a working lifetime.
2. 2026 contribution limits
| Age | 2026 limit |
|---|---|
| Under 50 | $7,500 |
| 50 and older (with catch-up) | $8,600 |
This limit is shared across all your IRAs, traditional and Roth combined — you can't contribute $7,500 to each. If you have both, split the total however makes sense for your tax situation, but the combined contribution can't exceed $7,500 (or $8,600 with the catch-up). The limit is also unrelated to your 401(k) limit, which is separate and much larger.
3. Who can actually contribute: the income limit
Unlike a traditional IRA, a Roth IRA has a hard income ceiling on direct contributions. For 2026, the ability to contribute phases out between $153,000 and $168,000 of modified adjusted gross income for single filers and heads of household, and between $242,000 and $252,000 for married couples filing jointly. Below the bottom of the range, you can contribute the full amount. Between the two numbers, your allowed contribution shrinks proportionally. Above the top of the range, you can't contribute directly at all.
You also need earned income (wages, salary, or self-employment income) at least equal to your contribution — investment income and Social Security don't count toward this requirement. A non-working spouse can still contribute through a spousal Roth IRA, based on the working spouse's earned income.
4. The backdoor Roth IRA, for high earners
If your income is above the phase-out range, you're not entirely locked out — you're just locked out of the direct route. The workaround, commonly called a "backdoor Roth IRA," involves contributing to a traditional IRA (which has no income limit on contributing, only on deducting) and then converting that traditional IRA balance to a Roth IRA. Because conversions have no income limit, this effectively gets high earners into a Roth IRA through a side door.
The catch is the "pro-rata rule": if you hold other pre-tax money in any traditional IRA (from old rollovers, for example), the conversion is taxed proportionally across all your traditional IRA balances, not just the new nondeductible contribution. This can create an unexpected tax bill, so anyone with existing traditional IRA balances should talk to a tax professional before executing a backdoor Roth. See our full walkthrough of the backdoor Roth process and the pro-rata rule for the step-by-step version.
5. Withdrawal rules: contributions vs. earnings
This is the single most misunderstood part of a Roth IRA. Your account balance is really two separate pools with two separate sets of rules:
- Your contributions can be withdrawn at any time, at any age, for any reason, with zero tax and zero penalty — because you already paid income tax on that money before it went in.
- Your earnings (the growth on top of your contributions) can only be withdrawn tax- and penalty-free once you're 59½ or older and your account has been open at least five years. Withdraw earnings before that, and you generally owe both income tax and a 10% early withdrawal penalty on the earnings portion, subject to a list of exceptions (first-time home purchase up to $10,000, certain education expenses, disability, and a few others).
This structure is exactly why a Roth IRA doubles as a decent emergency backstop, even though it isn't designed to be one — your contributions are always accessible without penalty, even if the growth on top of them isn't.
6. The two five-year rules (they're not the same thing)
People frequently conflate two different five-year clocks:
- The contribution five-year rule starts on January 1 of the tax year of your very first Roth IRA contribution (across any Roth IRA you own) and determines when earnings become eligible for tax-free withdrawal, alongside the age-59½ requirement.
- The conversion five-year rule applies separately to each individual Roth conversion (like a backdoor Roth) and determines when that specific converted amount can be withdrawn without the 10% early withdrawal penalty, regardless of your age. Each conversion has its own five-year clock.
In practice, most people only need to worry about the first rule, since it only takes five years and one contribution — made at any point, even $1 — to start that clock running for every Roth IRA you'll ever own.
7. No required minimum distributions
Traditional IRAs and 401(k)s force you to start withdrawing a minimum amount each year once you reach a certain age, whether you need the money or not. A Roth IRA has no such requirement during the original owner's lifetime. You can leave the entire balance invested and growing tax-free for as long as you want, which is one reason Roth IRAs are frequently used as an estate-planning tool — heirs inherit the account and, while they do have their own distribution rules to follow, they receive the money tax-free.
8. Roth IRA vs. Roth 401(k): not the same account
A Roth 401(k) is a different animal — it's an employer-sponsored account with the same after-tax, tax-free-growth structure as a Roth IRA, but it shares your 401(k) contribution limit ($24,500 for 2026) rather than the much lower IRA limit, and it has no income restriction on contributing. Some employers offer both traditional and Roth 401(k) options within the same plan; you can split contributions between them however you like, as long as the combined total stays within the 401(k) limit. See our complete guide to how a 401(k) works for the full breakdown of contribution limits, employer matching, and vesting.
9. Where a Roth IRA fits in your overall plan
Most financial plans use a Roth IRA alongside, not instead of, a workplace 401(k). If your employer offers a match, capturing the full match should generally come first — it's an immediate, guaranteed return no IRA can offer. After that, many people fund a Roth IRA next, both for its tax-free growth and its far wider menu of investment choices compared to a typical 401(k) lineup, before circling back to max out the 401(k) further. For a full side-by-side comparison of all three account types and a simple decision framework, see our guide to 401(k) vs. Roth IRA vs. traditional IRA. And since the account type matters far less than time in the market, our explainer on how compound interest works covers the math behind why starting early outweighs almost any other retirement decision.
Related Articles
The backdoor Roth has a catch if you have other IRA money
The backdoor Roth strategy assumes you have no other pre-tax traditional IRA balances, because the IRS applies a pro-rata rule across all your traditional IRAs when you convert — meaning if you already hold pre-tax IRA money elsewhere, only a proportional (not full) part of your conversion comes out tax-free, and the rest gets taxed. This catches a lot of people by surprise; check your existing IRA balances before assuming a backdoor Roth will be entirely tax-free for you.
Frequently Asked Questions
Yes. You can withdraw the amount you contributed (not the earnings) at any age, for any reason, tax- and penalty-free, because you already paid tax on that money. Only the earnings portion is subject to the age-59½ and 5-year rules.
If your income is above the 2026 phase-out range, you cannot contribute directly. Most high earners use a backdoor Roth IRA instead — contributing to a nondeductible traditional IRA, then converting it to a Roth IRA — which has no income limit.
There are two separate 5-year rules. The first applies to your very first Roth IRA and determines when earnings can be withdrawn tax-free. The second applies separately to each Roth conversion and determines when converted funds can be withdrawn without a 10% penalty.
Neither is universally better — they solve different problems. A 401(k) often comes with an employer match and a higher contribution limit; a Roth IRA offers tax-free withdrawals and more investment choices. Most people benefit from using both.
No. Roth IRAs are not subject to required minimum distributions during the original owner's lifetime, unlike traditional IRAs and 401(k)s. This makes them useful for leaving money to grow tax-free for as long as you want, or for heirs.
Yes. The two accounts have entirely separate contribution limits, so you can max out both in the same year if your income allows it — up to $24,500 in a 401(k) and up to $7,500 in a Roth IRA for 2026, subject to the Roth income phase-out.
See how your Roth IRA contributions could grow, with inflation and Social Security factored in.