The choice between a Roth IRA and a traditional IRA is often described as paying tax now or later. That is a useful beginning, provided the traditional contribution actually qualifies for a deduction. Without that check, the comparison can start from the wrong assumption.
A traditional IRA contribution is not automatically deductible. A Roth contribution is made without a deduction, while qualified Roth withdrawals are tax-free. The rules for putting money in and taking money out both belong in the decision.
Establish which contribution you can make
Regular IRA contributions generally require eligible compensation, such as wages or net self-employment income. A joint-filing couple may qualify under the spousal IRA rules when only one spouse has compensation. Pension and investment income alone do not create the same contribution room.
Traditional and Roth IRAs share one annual regular contribution limit. Opening one of each does not double it. Our guide to IRA limits for 2025 and 2026 explains the current amounts and age-based addition.
Direct Roth contributions are limited by modified adjusted gross income and filing status. A traditional IRA can still accept an otherwise eligible contribution when income prevents a deduction. If you or your spouse is covered by a retirement plan at work, check the deduction rules for your filing status on the IRS website.
Compare the tax saved now with the tax expected later
If a contribution is fully deductible, its immediate value depends on the marginal tax rate it reduces. In a simplified example, a $5,000 deduction entirely within a 22% federal bracket reduces federal income tax by $1,100. A $5,000 Roth contribution provides no corresponding deduction.
The comparison should use the same cost to your household. Putting $5,000 into either account is not the same current cash sacrifice when one choice produces a tax saving. Consider what happens to that saving: spending it and investing it lead to different outcomes.
A lower tax rate now can make Roth contributions attractive; a higher rate now and lower expected rate on withdrawals can favor a deductible traditional contribution. The future rate depends on more than whether you will be employed. Pensions, Social Security, withdrawals and filing status can all affect it. Our explanation of retirement income taxes puts those sources together.
Keep withdrawal rules and recordkeeping in view
Roth earnings are not automatically tax-free merely because the account is called Roth. Qualified distributions generally require the five-tax-year condition plus age 59½ or another qualifying circumstance. Regular contributions and earnings have different withdrawal treatment, so do not treat the whole balance as interchangeable cash.
Traditional withdrawals are generally taxable except for amounts representing after-tax basis. If you make a nondeductible contribution, reporting and preserving that basis, generally through Form 8606, helps prevent paying tax twice on the same contribution.
Choosing where new savings should go is also different from converting money already in a traditional IRA. Our Roth conversion discussion covers that separate tax decision. For new contributions, begin with eligibility and the available deduction, then compare the tax treatment against your own expected income.
