The In-Plan Roth Conversion High Earners Use to Bypass the Roth IRA Income Cap

"Direct Roth IRA contributions phase out between $242,000 and $252,000 of MAGI for married joint filers in 2026. An in-plan Roth conversion is governed by Section 402A of the tax code, and Congress wrote no income test into it. If your 401(k) plan document allows the feature, you can move money from the traditional sleeve to the Roth sleeve at any income level."

"The transfer is treated as ordinary income in the year you do it. That is the catch, and that is where the strategy lives or dies. For a couple at $310,000 of W-2 income, the 2026 brackets put them inside the 24% federal MFJ bracket, which runs from $211,401 to $403,550."

"Convert $50,000 of traditional 401(k) money to Roth and the conversion stacks on top of wages but stays inside that 24% band: roughly $12,000 of federal tax, plus state tax depending on where you live. Compare that to the rate those same dollars face in retirement."

"A high-earning couple drawing Social Security, RMDs from a multi-million-dollar 401(k), and pension or asset income often crosses into the 32% bracket above $403,550 or the 35% bracket above $501,050. The arithmetic: $50,000 at 24% today is $12,000, while $50,000 at 32% later is $16,000. You save $4,000 to $5,500 per $50,000 converted"

Roth IRA direct contributions phase out for married couples filing jointly in 2026 between $242,000 and $252,000 of modified adjusted gross income, leaving higher-income households above the limit. Backdoor Roth IRA steps can become complicated when existing pre-tax IRA balances trigger the pro-rata rule. A workplace plan can offer an in-plan Roth conversion that moves money from a traditional 401(k) to a Roth sleeve without an income limit, if the plan document allows it. The conversion is taxed as ordinary income in the year it occurs. Converting while income stays within a lower federal bracket can reduce taxes compared with later withdrawals that may fall into higher brackets.

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