Roth IRA vs. Traditional IRA: which is right for you?

1. The one difference that drives everything

Roth and Traditional IRAs hold the same investments, grow the same way, and share the same contribution limit. There is really only one difference between them, and everything else flows from it: when you pay the tax.

A Traditional IRA lets you deduct your contribution today and pay tax later, when you withdraw in retirement. A Roth IRA gives you no deduction today — you contribute after-tax dollars — but you never pay tax again, not on the growth and not on withdrawals. Same money, opposite tax timing. Which one wins depends entirely on whether your tax rate is higher today or will be higher when you retire.

2. Traditional IRA: deduct now, pay later

With a Traditional IRA, your contribution may be tax-deductible the year you make it, lowering your current tax bill. The money grows tax-deferred, and you pay ordinary income tax on every dollar you withdraw in retirement. The appeal is the immediate break: if you’re in a high bracket now, deducting a contribution at, say, 24% or 32% is real money back in your pocket today.

The catch is that the deduction can be limited. If you (or your spouse) are covered by a workplace retirement plan, the deductibility of a Traditional IRA contribution phases out at higher incomes — though you can still contribute, just without the deduction. And because the IRS eventually wants its tax, Traditional IRAs come with required minimum distributions starting at age 73, forcing taxable withdrawals whether you need the money or not.

3. Roth IRA: pay now, never again

A Roth IRA flips the timing. You get no deduction today — you fund it with money you’ve already paid tax on — but from then on it’s tax-free forever. The growth is tax-free, and qualified withdrawals in retirement are completely tax-free (once you’re 59½ and the account has been open five years). For a younger saver with decades of compounding ahead, that tax-free growth can be worth far more than a deduction today.

Roths carry two more quiet advantages. There are no required minimum distributions during the owner’s lifetime, so the money can keep compounding tax-free as long as you like. And you can withdraw your contributions (not earnings) at any time without tax or penalty, which makes a Roth double as a flexible backstop. The trade-off is the income limit: high earners can’t contribute to a Roth directly — more on the workaround below.

4. The decision rule: now vs. later

Here’s the rule that settles most cases: if your tax rate will be higher in retirement than it is now, choose Roth; if it’ll be lower, choose Traditional. That’s not a rule of thumb — it’s the actual math, because the only thing that differs between the two accounts is the rate applied to the same dollars.

In practice that means younger and lower-income savers usually favor Roth — they’re paying tax at a low rate now and have decades for tax-free growth to compound — while high earners in peak years often favor Traditional, capturing a valuable deduction now and expecting a lower bracket later. Many people simply can’t predict future rates and split contributions between both to hedge. The calculator below shows exactly how the bet plays out with your numbers.

5. Compare them with your numbers

Enter a contribution, a time horizon, an expected return, and your tax rates now and in retirement. The calculator grows the same pre-tax dollars down each path and shows the after-tax value you’d actually keep — the only fair comparison.

6. The 2026 limits and income rules

Two things trip people up. First, the limit is a combined cap: you can’t put $7,500 in a Roth and $7,500 in a Traditional. Second, the Roth limit is about contributing, while the Traditional limit is about deducting — you can always contribute to a Traditional IRA, you just may not get the deduction.

7. When income blocks you: the backdoor Roth

If your income is above the Roth phase-out, the door isn’t fully closed — there’s a legal side entrance called the backdoor Roth. Because Traditional IRA contributions have no income limit, you contribute to a non-deductible Traditional IRA and then convert it to a Roth. Convert quickly, before the money grows, and there’s little or nothing to tax on the way through.

The one trap to respect is the pro-rata rule. If you hold any pre-tax money across your Traditional, SEP, or SIMPLE IRAs, the IRS treats your conversion as a proportional blend of pre-tax and after-tax dollars — which can trigger an unexpected tax bill. The standard fix is to roll existing pre-tax IRA balances into a workplace 401(k) first, leaving only the after-tax contribution to convert cleanly. It’s a well-worn, legal strategy, but the pro-rata math is worth running with a tax professional before you start.

8. Beyond taxes: RMDs, flexibility, legacy

The bracket comparison is the heart of the decision, but three non-tax factors often tip a close call toward Roth. No required distributions: a Roth never forces money out, so it keeps compounding tax-free and gives you full control over your taxable income in retirement — useful for managing IRMAA and the taxation of Social Security. Flexibility: you can pull Roth contributions out anytime, tax- and penalty-free, so it doubles as an emergency backstop. Legacy: heirs who inherit a Roth still face the 10-year cleanout rule, but their withdrawals are tax-free — a far better inheritance than a fully taxable Traditional account.

If you’re a federal employee, this same logic plays out inside the TSP, where you choose between Roth and Traditional TSP contributions. The IRA decision is a useful complement: many feds max the TSP and fund an IRA, and splitting the tax treatment across both gives you valuable flexibility to control your bracket in retirement — pulling from taxable Traditional money up to a target, then tapping tax-free Roth money above it.

9. Frequently asked questions