mega backdoor Roth
A strategy allowing after-tax 401k contributions of up to $43,500 to be converted to Roth — dramatically increasing Roth savings.
Example
“The mega backdoor Roth strategy allowed her to add $30,000 in Roth savings on top of standard contributions.”
Memory Tip
MEGA BACK DOOR — turbocharge Roth savings if your 401k plan allows it.
Why It Matters
This strategy matters because it allows high-income earners to accumulate significantly more tax-free retirement savings beyond standard Roth IRA contribution limits. By converting after-tax contributions to Roth accounts, you can build a larger pool of money that grows and withdraws tax-free in retirement, potentially saving hundreds of thousands in taxes over your lifetime.
Common Misconception
Many people mistakenly believe that if they earn too much to contribute directly to a Roth IRA, they have no other way to build Roth savings. In reality, the mega backdoor Roth bypasses income limits entirely by using after-tax 401k contributions as a workaround, making it accessible to high earners who would otherwise be excluded.
In Practice
Consider a married couple earning $300,000 annually who want to maximize Roth savings. They contribute $43,500 in after-tax money to their 401k plans and immediately convert this to a Roth IRA, avoiding taxes on the conversion. Over 10 years, assuming 7 percent annual growth, this strategy could grow to approximately $860,000 in tax-free Roth retirement funds that would have been completely unavailable through standard contribution methods.
Etymology
Modern retirement tax planning — maximizing Roth savings beyond standard limits.
Common Misspellings
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