Roth vs. Traditional IRA: 5 Tax Rules That Decide Which Fits You

Quick summary

A Traditional IRA can give you a tax break today, and you pay income tax when you withdraw in retirement. A Roth IRA works the other way: you contribute after-tax dollars, and qualified withdrawals later are tax-free. Both share the same 2026 contribution limit of $7,500, or $8,600 if you are 50 or older. The better fit depends on your tax rate now compared with later, your income, and how you feel about required withdrawals.

How each account taxes you

Think of the two accounts as mirror images. A Traditional IRA moves the tax bill into the future. You may deduct contributions on this year's return if you qualify, the money grows tax-deferred, and you pay ordinary income tax on withdrawals in retirement.

A Roth IRA moves the tax bill into the present. You get no deduction now, the money grows tax-free, and qualified withdrawals cost you nothing in federal income tax. That trade is the whole decision in one sentence: pay tax now, or pay tax later.

The 2026 contribution limit applies to both accounts together, not each. You can split $7,500 between a Traditional and a Roth IRA any way you like, for example $4,000 in one and $3,500 in the other, but the total cannot exceed the limit. If you are 50 or older, the limit rises to $8,600.

Feature	Traditional IRA	Roth IRA
Tax on contributions	May be deductible now	After-tax, no deduction
Tax on withdrawals	Taxed as income later	Tax-free if qualified
2026 contribution limit	$7,500 combined ($8,600 if 50+)	$7,500 combined ($8,600 if 50+)
Income limits	Deduction phases out if covered by a workplace plan	Direct contributions phase out at higher incomes
Withdrawal timing	Penalty-free at 59.5	Contributions anytime; earnings need 59.5 plus the 5-year rule
Required withdrawals	Start at a set age, currently 73	None for the owner

The 5 tax rules that decide

Rule 1 is the contribution limit itself. For 2026, the IRS sets the combined Traditional and Roth IRA limit at $7,500, or $8,600 if you are 50 or older. Your contribution also cannot exceed your taxable compensation for the year.

Rule 2 covers who can deduct Traditional IRA contributions. If neither you nor your spouse is covered by a retirement plan at work, you can generally deduct the full contribution. If you are covered, the deduction phases out as income rises. For 2026, the IRS lists the phaseout for single filers covered by a workplace plan as $81,000 to $91,000 of modified adjusted gross income. Above that range, the deduction disappears, though you can still contribute nondeductible dollars.

Rule 3 covers who can contribute to a Roth IRA at all. For 2026, the IRS lists the Roth phaseout as $153,000 to $168,000 for single filers and heads of household, and $242,000 to $252,000 for married couples filing jointly. Above the top of your range, direct Roth contributions are not allowed.

Rule 4 is the Roth 5-year rule plus the age 59.5 line. You can generally withdraw your Roth contributions at any time without tax or penalty, because you already paid tax on them. Earnings are a different story: they come out tax-free only for qualified distributions, which generally means you are at least 59.5 and the account has been open for five years. Withdraw earnings early and you can owe tax plus a 10 percent penalty, with some exceptions. Check the IRS rules in Publication 590-B for your situation.

Rule 5 is required minimum distributions. Traditional IRA owners must start taking required minimum distributions at a set age, currently 73, whether they need the money or not. The age is scheduled to change for younger savers, so check the IRS rules for your birth year. The IRS states that required distribution rules do not apply to Roth IRAs while the owner is alive, which makes the Roth flexible for people who want to leave the account growing or pass it on.

A worked example: $500 a month for 30 years

Numbers make the tax timing concrete. Suppose you contribute $500 at the end of each month for 30 years and earn 7 percent a year, compounded monthly. The future value formula is:

Future value = 500 x (((1 + 0.07/12)^360 - 1) / (0.07/12)) = $609,985.50

Assumptions, stated plainly so you can reproduce this: 7 percent nominal annual return, monthly compounding, contributions at month end, no fees, no taxes during growth. Real returns vary and are never certain. You put in $180,000 total and growth adds $429,985.50 in this example.

Now apply the tax timing. In a Traditional IRA, the full $609,985.50 balance is pre-tax, so withdrawals are taxed as ordinary income. In a Roth IRA, you paid tax on the $180,000 of contributions up front, and the entire balance can come out tax-free if your withdrawals are qualified.

Which leaves you with more spendable money? It depends on your marginal tax rate when you contribute versus when you withdraw. If your rate is the same in both periods, the math favors neither account, and features like required distributions or income limits tip the choice. If you expect a lower rate in retirement, the Traditional deduction now is worth more. If you expect a higher rate later, paying tax now through the Roth often comes out ahead. Consider running both scenarios with your own rates before you decide, and check with a tax professional if your situation is complex.

6 steps to choose and start

Step 1: Check your eligibility. Confirm your income against the Roth limits and the Traditional deduction phaseout for 2026. If your income is above the Roth range, the Traditional side may be your only direct option.

Step 2: Compare your tax timing. Ask yourself one question: is my marginal tax rate likely higher now or in retirement? Early-career savers in lower brackets often lean Roth. Peak earners expecting lower retirement income often lean Traditional.

Step 3: Weigh the non-tax features. Do required distributions bother you? Do you want the option to withdraw contributions early without penalty? These practical differences matter as much as the tax math.

Step 4: Open the account. Banks, brokerages, and robo-advisors all offer IRAs. The account type you open determines the tax treatment, so double-check that the paperwork says Roth or Traditional before you fund it.

Step 5: Automate the contribution. Set a monthly transfer that fits the annual limit. For 2026, $7,500 over 12 months is $625 a month. Automation beats willpower, and it keeps you contributing when markets wobble.

Step 6: Invest inside the account and review yearly. Cash sitting in an IRA earns little. Choose investments that match your timeline, then revisit the Roth-versus-Traditional question each year as your income changes.

This article is for general information, not financial advice.