Roth Conversions vs. Roth Contributions: Which One Should You Prioritize?

If you can contribute directly to a Roth IRA, do that first: at $7,000 in 2024 ($8,000 if you're 50 or older), the direct contribution is the cheapest Roth dollar you will ever get, because it triggers no extra tax. A conversion is the tool when income limits close that door or you need to move more: no income limit, no dollar cap, but every dollar converted is taxed as ordinary income that year.

What Each One Actually Is

A Roth contribution is after-tax money you put in directly, up to the annual limit. The catch for high earners: eligibility phases out starting at $146,000 of modified adjusted gross income (MAGI) for single filers and $230,000 for married couples filing jointly in 2024. Most HENRYs have crossed those lines, which leaves the backdoor method: contribute to a traditional IRA (non-deductible), then convert it to Roth shortly after. Because the contribution was after-tax, the conversion generates little or no additional tax, assuming no other pre-tax IRA balances exist.

A Roth conversion moves money that already sits in a traditional IRA, 401(k), or similar pre-tax account into a Roth. The converted amount lands on top of your taxable income at ordinary rates. You pay tax today in exchange for tax-free growth later.

The Watchouts That Change the Answer

The pro-rata rule is the backdoor's trap. When you convert, the IRS treats all your traditional IRA money as one pool. If you have $95,000 in a rollover IRA from an old 401(k) and add a $7,000 non-deductible contribution, only about 6.8% of any conversion counts as after-tax; the rest is taxable. The backdoor only works cleanly when your pre-tax IRA balance is zero or negligible.

Conversions carry their own hazards. A large conversion in one year can push you into a higher bracket, trigger IRMAA surcharges on Medicare premiums two years later (relevant if you're converting in your early 60s), and reduce ACA premium subsidies if you're not yet on Medicare.

The five-year rule applies to both paths. Each conversion starts its own five-year clock for penalty-free withdrawal of converted principal if you're under 59½; contributions have a separate clock.

A Worked Example

A 38-year-old software engineer, married filing jointly, $340,000 in household MAGI, maxing her 401(k), with a $180,000 rollover IRA from a previous employer plus $7,000 she contributed non-deductibly this year.

A backdoor attempt fails the pro-rata test: after the contribution her total IRA balance is $187,000, of which only $7,000 (3.7%) is after-tax, so converting the $7,000 still leaves roughly $6,740 of it taxable. The cleaner sequence: roll the $180,000 into her current employer's 401(k), if the plan accepts incoming rollovers, which eliminates the pro-rata problem. Then she can run a clean $7,000 backdoor contribution each year and layer in modest conversions later, sized to stay within her bracket.

How This Connects to the Roth Conversion Pillar

Both routes serve the same structural goal: moving assets into the tax-free bucket, work that lives in the Soil layer of the Sporos Doctrine. How to sequence conversions across multiple years, model bracket thresholds, and recognize when a conversion is clearly the wrong call is covered in the pillar, Roth Conversion: A Practical Guide for High Earners and Pre-Retirees.

Frequently Asked Questions

Can I do both a backdoor Roth contribution and a Roth conversion in the same year?

Yes, they are separate transactions with no rule against combining them. Track the basis carefully using IRS Form 8606.

Does the backdoor Roth contribution count against the annual contribution limit?

Yes. The $7,000 limit applies to the underlying traditional IRA contribution; the subsequent conversion does not count separately toward any limit.

What if my employer 401(k) doesn't accept incoming rollovers?

Then the pro-rata problem remains until you find a plan that does. A solo 401(k) can also work if you have any self-employment income.

Is there an income limit on Roth conversions?

No. Congress removed the income limit on conversions in 2010, so any amount can be converted regardless of your income.

What to Do Next

What decides this for you. Whether your income still allows a direct Roth contribution. If it does, that is the cheaper move and it should be exhausted first, because it costs no tax at all. Conversion is what you do when the front door is closed.

Where it goes wrong. People at the edge of the phase-out convert while still eligible to contribute, paying tax to accomplish something they could have done for free. The mirror error is assuming the door is shut when it is not, since eligibility runs on modified adjusted gross income rather than salary, and deductions can pull someone back under a threshold they assumed they had cleared years ago. Both errors come from guessing at the number instead of calculating it.

Worth a conversation if your income lands anywhere near the phase-out, it varies year to year, or you are considering doing both in the same year. Which one to fill first, and by how much, depends on a figure you will not know until late in the year. Book a call.

The information provided is for educational purposes only and does not constitute investment, legal, or tax advice. Tax law changes frequently — verify current rules before acting. Consult with qualified professionals for guidance specific to your situation.