Roth IRA vs Traditional IRA: How to Choose

A Roth IRA and a Traditional IRA are both individual retirement accounts that offer meaningful tax advantages, but they work in opposite directions. Understanding the difference is one of the highest-value pieces of financial knowledge a US worker can acquire.

This guide covers how each account works, the current contribution and income limits (per the IRS), and a decision framework for choosing between them. Verify current-year figures at irs.gov before contributing.

How a Traditional IRA works

You contribute pre-tax dollars (subject to income and workplace-plan rules for the deduction), the money grows tax-deferred, and you pay ordinary income tax on withdrawals in retirement. You must start required minimum distributions (RMDs) at age 73 under current law. Early withdrawals before age 59½ typically trigger a 10% penalty on top of ordinary income tax, with some exceptions.

How a Roth IRA works

You contribute after-tax dollars, the money grows tax-free, and qualified withdrawals in retirement are tax-free. Roth IRAs have no required minimum distributions during the account owner's lifetime. Contributions (but not earnings) can be withdrawn at any time, tax- and penalty-free, which gives the Roth an unusual amount of flexibility for a retirement account.

Contribution and income limits

The annual contribution limit is set by the IRS and updated periodically. In recent years the limit has been $7,000 (with an additional $1,000 catch-up contribution for savers age 50 and older). Roth IRAs also phase out at higher incomes — a common phase-out range for single filers has been around $150,000 and for married-filing-jointly around $236,000. Traditional IRA contributions are always allowed, but the tax deduction phases out at similar thresholds if you or a spouse have a workplace retirement plan. Confirm current-year limits at irs.gov before contributing.

The core decision: current vs future tax rate

The single most important question is whether your marginal tax rate will be higher or lower in retirement than it is today. If you expect a higher rate later, Roth wins — you pay tax at today's lower rate and skip it at tomorrow's higher rate. If you expect a lower rate later, Traditional wins — you skip tax at today's higher rate and pay at tomorrow's lower rate.

Because no one knows their future tax rate with certainty, many people split contributions between both accounts (called "tax diversification"). This hedges against a future that turns out differently than expected.

Rules of thumb by career stage

Early-career workers in low tax brackets often benefit most from Roth contributions, because paying tax at a low rate now is likely a better deal than paying at an unknown (probably higher) rate decades later. Mid-career high earners often benefit more from Traditional contributions, because the current deduction is worth more when marginal rates are high. Late-career workers whose retirement plans are largely finalized should look at their projected retirement bracket to decide.

When neither is a fit

If your income exceeds the Roth phase-out and you are already covered by a workplace retirement plan, the Traditional deduction may not apply either. In that case, the "backdoor Roth" strategy — contributing to a nondeductible Traditional IRA and immediately converting to Roth — remains available under current law, subject to the pro-rata rule. Consult a tax professional before executing a backdoor Roth to avoid unexpected tax bills.