The Roth IRA, in plain English.

What it is

An IRA — Individual Retirement Arrangement — is a tax-advantaged investment account you open in your own name at a brokerage (Fidelity, Schwab, Vanguard, etc.). It is not itself an investment. Inside it, you can hold whatever the brokerage offers — index funds, individual stocks, bonds, ETFs, even cash. The IRA wrapper changes how those holdings are taxed, not what they are.

There are two main flavors:

• Traditional IRA. Contribution may be tax-deductible in the current year; you pay tax when you withdraw in retirement.
• Roth IRA. No deduction up front. You pay tax now (it’s just regular take-home pay). But: no tax on the contributions, the growth, or the withdrawals in retirement.

For tax year 2026, the IRA contribution limit for either kind is $7,500 a year ($8,600 if you’re 50 or older — the standard $7,500 plus a $1,100 catch-up, up from $1,000 the prior year). Roth IRA contributions phase out across an income range: $153,000–$168,000 for single filers and $242,000–$252,000 for married filing jointly. Below the lower end you can contribute the full amount; between the two thresholds the limit drops on a sliding scale; above the upper end you can’t contribute directly. (Source: IRS Notice 2025-67, released November 2025. Check IRS.gov for the current year’s thresholds before contributing near the cap.)

Roth vs. traditional

The whole choice between Roth and traditional comes down to one question: do you expect to be in a higher tax bracket now or in retirement?

• Higher now → traditional. You take the deduction at today’s higher rate, pay tax at tomorrow’s lower rate.
• Higher later → Roth. You pay tax at today’s lower rate, withdraw tax-free at tomorrow’s higher rate.

For most people in the first half of their careers, “higher later” is the better guess. Income usually rises over a working life. Tax rates, in expectation, are at or near historical lows. Roth wins both forecasts.

The Roth doesn’t earn higher returns than a taxable account — it just doesn’t lose returns to capital-gains taxes along the way. Over decades, that gap compounds. The taxable- account figure here assumes you pay long-term capital-gains tax (15%) only at the end, which is actually the best-case for the taxable account — annual dividend tax during the holding period would widen the gap further.

Who it’s best for

Roth IRAs are most evidence-based for:

• Early-career earners. Lower current bracket, decades of tax-free growth ahead.
• Anyone whose 401(k) match is already maxed out and wants additional retirement savings.
• People without an employer retirement plan. The IRA is your primary retirement account.
• Higher-earning savers using a backdoor Roth (see definition above).

They’re less compelling for people in the highest tax brackets right now who expect a significant drop in retirement (some surgeons, some lawyers, some founders post-exit) — for those, the traditional deduction is worth more.

The rules that actually matter

Most of the “Roth IRA rules” you’ll see in personal-finance content are corner cases. The ones that matter day to day:

1. You can withdraw your contributions at any time, for any reason, without tax or penalty. This makes the Roth function as a hybrid retirement / backup-emergency account. The growth is what’s locked up — withdraw that before 59½ and you owe tax + 10%.
2. Contributions for tax year X can be made until April 15 of year X+1. You can make a 2026 contribution as late as April 2027.
3. The contribution must come from earned income. Investment income alone doesn’t qualify. Gifts or inheritances don’t qualify.
4. You don’t have to take required minimum distributions in retirement. Unlike a traditional IRA, Roth IRAs have no RMDs during your lifetime — you can leave the money to grow.

A practical first step, if you don’t already have one: open a Roth IRA at any major brokerage (it takes 10 minutes), set up an automatic transfer of $625/month for a full calendar year (that hits the $7,500 limit), and put the contributions into a broad-market index fund. You’ll have done more for your retirement in an afternoon than most people manage in a year.