Why trust this guide: built from current IRS figures for 2026, with growth math you can re-run yourself. No fund pitches, no account-opening hype — just how the rules actually work. Our editorial standards are public.
A Roth IRA is a retirement account you fund with money you've already paid tax on, in exchange for a big payoff later: the money grows tax-free, and qualified withdrawals in retirement are 100% tax-free. "IRA" stands for individual retirement arrangement — it's an account you open yourself, separate from any job, and the "Roth" part just describes the tax treatment. You put in after-tax dollars now so that decades of growth come out untaxed later.
That trade — pay a little tax now to skip a potentially huge tax bill later — is the whole pitch. This guide explains exactly how it works, what you can put in for 2026, how it stacks up against a traditional IRA, and how to open one in an afternoon.
How does a Roth IRA actually work?
Think of it in three steps. You contribute money you've already earned and paid income tax on. You invest that money inside the account — in index funds, ETFs, stocks, or bonds — and it grows without you owing any tax on dividends or gains along the way. Then, in retirement, you withdraw it all tax-free.
The key difference from a regular brokerage account is that tax-free growth. In a taxable account, you can owe tax every year on dividends and again when you sell at a profit. Inside a Roth, none of that happens — the account is a sealed, tax-free greenhouse. The catch is the contribution limit and the rules about when you can take earnings out, both covered below.
One point that trips people up: the Roth IRA is the account, not the investment. Opening one and leaving the cash sitting there does almost nothing. You have to actually invest the money inside it — a low-cost index fund or ETF is the common beginner choice.
How much can you contribute in 2026?
For tax year 2026, you can contribute up to $7,500 if you're under 50, or $8,600 if you're 50 or older (that includes a $1,100 "catch-up" amount). That's the combined limit across all your IRAs — traditional and Roth together — not per account.
Two more rules matter. First, you need earned income (wages or self-employment income) to contribute, and you can't put in more than you earned that year. Second, you have until that year's tax-filing deadline the following April to make a contribution, so 2026 contributions can be made into spring 2027.
Who can open one — and who gets phased out?
Most working people can open a Roth IRA, but high earners get limited or shut out entirely. Eligibility is based on your modified adjusted gross income (MAGI) and filing status. For 2026, the ability to contribute phases out across these ranges:
| Filing status | Full contribution below | Phased out above |
|---|---|---|
| Single / head of household | $153,000 | $168,000 |
| Married filing jointly | $242,000 | $252,000 |
| Married filing separately | $0 | $10,000 |
If your income lands inside the range, you can make a reduced contribution; above the top number, you can't contribute directly at all. (High earners sometimes use a "backdoor Roth" — contributing to a traditional IRA and converting it — but that has tax wrinkles worth running by a tax pro first.)
Roth vs. traditional IRA: which should you choose?
Both are tax-advantaged retirement accounts with the same contribution limit. The difference is when you get the tax break.
| Roth IRA | Traditional IRA | |
|---|---|---|
| Tax on contributions | Paid now (after-tax) | Often deductible now |
| Tax on withdrawals | Tax-free in retirement | Taxed as income |
| Income limits to contribute | Yes (see above) | No limit to contribute* |
| Required withdrawals (RMDs) | None for the owner | Yes, starting at 73 |
| Early access to contributions | Anytime, tax/penalty-free | Generally penalized |
*Anyone with earned income can contribute to a traditional IRA, though the deduction phases out if you have a workplace plan.
The simple rule of thumb: if you expect to be in a higher tax bracket in retirement than you are now — which is common for younger workers and early-career earners — the Roth's "pay tax now" deal usually wins. If you're a high earner today who expects lower income in retirement, the traditional deduction may be worth more. When you're genuinely unsure, splitting contributions between both is a defensible hedge.
Where a Roth IRA fits in your plan
A Roth IRA is rarely the first dollar you invest. The widely used priority order looks like this:
Grab any employer 401(k) match first — that's an instant return you can't beat. Then a Roth IRA is often the next stop, because tax-free growth is so valuable. Once you've maxed the IRA, you can go back to the 401(k) or add a taxable brokerage account. Work bottom-up; each level is a better deal than the one above it.
This is also why a Roth pairs naturally with learning to invest your first $100 — the account is the wrapper, and simple index funds are what goes inside.
How to open a Roth IRA in 4 steps
- Pick a brokerage. Choose a major low-cost provider (a brokerage or a robo-advisor if you'd rather it be automated). Compare account fees and the expense ratios of their funds — small percentages compound into real money over decades.
- Open and verify the account. It takes about 15 minutes online. You'll need your Social Security number, a government ID, and a bank account to link. Select "Roth IRA" specifically, not a regular brokerage account.
- Fund it. Transfer money from your bank — a lump sum, or better, an automatic monthly contribution. Remember the annual cap.
- Actually invest it. This is the step people skip. Buy your chosen fund(s) with the cash. A single broad-market index fund or target-date fund is a perfectly reasonable one-fund starting point.
Common mistakes to avoid
- Opening the account but never investing. Cash sitting in a Roth isn't "invested." You must buy funds inside it.
- Assuming you can't touch it. You can withdraw your contributions (not earnings) at any time, tax- and penalty-free — a genuinely useful flexibility most retirement accounts don't offer.
- Waiting for a "perfect" amount. Time in the market is the engine. $50 a month started now beats $500 a month started in five years.
- Forgetting the deadline. You can still make a prior-year contribution up until the April tax deadline — don't leave the window unused.
Who should skip a Roth IRA (for now)
A Roth isn't always the first priority. Skip or delay it if:
- You have no emergency fund. A retirement account is the wrong place for money you might need next month. Build a starter emergency fund first.
- You're carrying high-interest debt. Paying off a 22% credit card is a guaranteed, tax-free "return" that beats any market average. Clear it first.
- You're not leaving an employer match on the table. If your job matches 401(k) contributions and you're not capturing it, that's free money that comes before an IRA.
- You earn above the limit. Direct Roth contributions aren't available — look at the traditional or backdoor route instead.
On an irregular income, you don't need to commit monthly — you can contribute lump sums in good months, right up to the April deadline, as long as you stay under the cap. On a tight budget, even $25 a month opens the door and builds the habit; you can scale up later. And if you're starting from zero with no investing experience, a Roth IRA holding one target-date fund is one of the simplest, most forgiving first moves in all of personal finance.
Quick answers
Is a Roth IRA worth it? For most people with earned income who expect to be in a similar or higher tax bracket in retirement, yes — tax-free growth and tax-free withdrawals are hard to beat, and there are no required withdrawals. It's less compelling if you're a high earner today who will drop into a much lower bracket later, in which case a traditional IRA's upfront deduction may be worth more.
Can I withdraw money from a Roth IRA before retirement? You can withdraw your contributions at any time, tax- and penalty-free, because you already paid tax on that money. Earnings are different: to take those out tax-free you generally must be 59½ and have had the account open for at least five years. Pulling earnings early can trigger taxes and a 10% penalty.
Roth IRA vs. 401(k): which comes first? If your employer matches 401(k) contributions, contribute enough to get the full match first — it's free money. After that, a Roth IRA is often the next priority because of its tax-free growth and flexibility, then you can return to the 401(k) to invest more.
What happens if I contribute too much or earn too much? Excess contributions are hit with a 6% tax for each year they remain in the account. If you catch it before the tax-filing deadline, you can withdraw the excess plus its earnings and avoid the penalty. If your income is above the Roth limit, a direct contribution isn't allowed at all.
How much will a Roth IRA grow? There's no guaranteed number — it depends on how much you contribute, how long it compounds, and market returns. As an illustration, $300 a month for 35 years at a hypothetical 7% average return is roughly $540,000, most of it tax-free growth. Use a compound interest calculator with your own assumptions.