Clark Howard Says Skip the Backdoor Roth IRA: Here’s the Math for High Earners

Clark Howard, the consumer advocate behind The Clark Howard Show, has told high-earning listeners to think twice before chasing the backdoor Roth IRA. His broader view is that roughly 95% of wage earners would be better off directing all retirement contributions into a Roth 401(k). For couples already maxing a 401(k) and using the mega-backdoor Roth inside their workplace plan, the extra $7,500 per spouse in IRA space rarely justifies the paperwork and tax risk it creates.

The stakes are concrete. A 48-year-old married couple earning $380,000 sits well above the 2026 Roth IRA phase-out ceiling of $252,000 for joint filers. They can either route $15,000 a year through the back door or skip it. Done wrong, the move triggers a surprise tax bill. Done right, it adds real but modest wealth to a household already saving aggressively elsewhere.

The verdict and the math

Howard’s caution is correct for most households that fit this profile. The backdoor Roth works, but the marginal payoff is smaller than the marketing suggests, and the execution risk is higher than it first appears. Each spouse contributes $7,500 a year, invested at a 7% return for 20 years. Using the standard annuity factor of 40.99, that grows to roughly $307,000 of tax-free wealth per spouse, or $614,000 combined at age 68.

That is real money, but on a $380,000 income it is a modest addition to an already large savings base. The same couple maxing two 401(k)s at the 2026 federal employee deferral limit of $24,500 each, plus a mega-backdoor Roth inside the plan, can shelter far more than the backdoor IRA adds. The 2026 total defined-contribution limit is $72,000 per person, meaning the after-tax bucket inside a permissive 401(k) can absorb tens of thousands of additional dollars annually. The backdoor IRA, in that context, buys a small slice of an already large pie.

The pro-rata rule trap that wrecks the strategy

The single variable that decides whether the backdoor Roth helps or hurts is whether either spouse holds any pre-tax IRA balance. Old 401(k) rollovers, SEP-IRAs, and deductible traditional IRA contributions all count.

Under IRC Section 408(d)(2), the IRS aggregates every traditional, SEP, and SIMPLE IRA a taxpayer owns when calculating the taxable portion of a Roth conversion. If a spouse converts $7,500 of after-tax contributions while sitting on a $92,500 rollover IRA, the IRS treats only 7.5% of the conversion as basis. The remaining 92.5% is taxable at the household’s marginal rate, which at $380,000 falls in the 24% federal bracket plus applicable state tax.

The fix requires clearing the deck first. Roll the pre-tax IRA balance into the current employer’s 401(k) before December 31 of the conversion year, leaving the traditional IRA at zero. Then make the nondeductible contribution, convert it promptly, and file Form 8606 to document basis. Miss any step and the math flips against you.

If neither spouse holds a pre-tax IRA balance, the backdoor is clean. The full $7,500 converts tax-free and the projection above holds. If one spouse does hold a pre-tax balance and skips the rollover step, the conversion can generate $1,800 to $2,000 in unexpected federal tax per spouse, every year the move repeats.

What to do this week

Map your priorities in order. First, max both 401(k)s to the 2026 federal employee deferral limit of $24,500. Second, capture any employer match. Third, if your plan allows after-tax contributions plus in-service Roth conversions, run the mega-backdoor Roth inside the 401(k) before touching the IRA backdoor. The 2026 total defined-contribution cap of $72,000 per person means a well-designed plan can absorb far more than the $7,500 IRA limit.

Then audit every IRA either spouse owns. Pull the December 31 balance from each custodian. If any pre-tax dollars sit there, call your 401(k) provider and ask whether the plan accepts incoming IRA rollovers. If yes, complete the rollover before attempting the backdoor.

One more wrinkle worth knowing: starting in 2026, a SECURE 2.0 provision requires workers whose Social Security wages exceed $150,000 to make any 401(k) catch-up contributions as Roth rather than pre-tax. For the household in this example, that means catch-up dollars already flow into Roth status inside the workplace plan, adding another reason to exhaust the 401(k)’s Roth capacity before relying on the IRA backdoor.

File Form 8606 every year you make a nondeductible contribution. The form establishes basis, and without it the IRS can tax the same dollars twice. Treat the backdoor Roth as a tool for a specific job, not a goal in itself. If your 401(k) is already doing the heavy lifting, Howard is right that the extra paperwork rarely earns its keep.

Editor’s note: This article was updated to reflect 2026 IRS contribution limits, including the increase in the 401(k) employee deferral limit to $24,500, the rise in the total defined-contribution cap to $72,000, and the SECURE 2.0 provision mandating Roth treatment for catch-up contributions made by workers with Social Security wages above $150,000. The 2026 Roth IRA phase-out ceiling for married joint filers of $252,000 was also added for context.