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Writer's pictureDanielle Seurkamp, CFP®

After-Tax Contributions Part Two- The Mega Backdoor Roth

 

Uncovering Tax-Free Retirement Growth


Did you know that in 2024, the maximum employee contribution limit to a 401(k) is $23,000 for those under 50 and $30,500 for those 50 and older? While these limits help foster disciplined savings, they also cap the potential tax-advantaged growth one can achieve. Enter the Mega Backdoor Roth 401(k), a strategy that allows individuals to exceed these limits and supercharge their retirement savings with the benefits of a Roth by making additional after-tax contributions to their 401(k) and later converting them to a Roth account.


The Roth Advantage


Roth accounts offer significant advantages, primarily through tax-free growth and tax-free qualified withdrawals in retirement. Unlike traditional 401(k) contributions, for which you get a tax deduction in the year of contribution but later pay tax when you take the money out, Roth 401(k) contributions are made with after-tax dollars and can be withdrawn tax-free in retirement. Even withdrawals of earnings in a Roth, which were never taxed, also enjoy the tax-free withdrawal status assuming the account has been open for at least five years and the account holder is 59½ or older.


This makes Roth accounts a powerful tool for long-term retirement planning.  The Mega Backdoor Roth method increases the savings you can get into a Roth account.


The Mega Backdoor Roth: How Does it Work?


The Power of After-Tax Contributions


The Mega Backdoor Roth strategy hinges on the ability to make after-tax contributions to your 401(k). They are called after-tax contributions because you won’t get an immediate tax break for adding these dollars to your 401(k). 


You can only make after-tax contributions if you have already reached the maximum limit for regular contributions to your 401(k).  Your employer’s plan must also allow after-tax contributions, which not all do.  If both conditions are met, you can potentially contribute up to an additional $38,500 to your 401(k) in 2024. 


You may be asking why you would do this if you get no tax deduction on the after-tax contributions.  Good question! 


Once the extra money is invested in your 401(k), it will hopefully grow.  If that growth occurred outside the 401(k), you would pay tax annually on the interest and dividends and anytime you sold something for more than you paid.  Inside the 401(k), that growth incurs no annual tax, leaving more money in the account to grow. 


The Conversion Magic


Where you allow the growth of your after-tax contributions is key. 


If you simply made after-tax contributions and allowed them to grow in your traditional 401(k) plan, you would pay taxes on the growth when you take withdrawals in retirement.  If instead, you move the after-tax contributions into a Roth account, you can permanently avoid taxation on the interest dividends and growth. 


The crux of the Mega Backdoor Roth strategy is converting those after-tax contributions to a Roth account. This conversion can happen either within the 401(k) plan while you are still employed or by rolling the funds over to a Roth IRA when you leave the company.


Mega Backdoor Roth in Action: The Two Main Conversion Methods


In-Service Withdrawal (while Employed)


The most effective method of executing a Mega Backdoor Roth conversion is with an in-service withdrawal. This involves withdrawing the after-tax contributions from your 401(k) while still employed and transferring them to a Roth IRA, where future earnings will be tax-free.


It's crucial to note that not all employers allow in-service withdrawals for Roth conversions and some employers that do allow them, limit their frequency. Therefore, checking with your plan administrator is essential to confirm this option is available in your 401(k) plan.


Rollover (After Leaving Your Job)


If your employer doesn’t allow in-service contributions, you can still benefit from making after-tax contributions.  The first way, as noted above, is by allowing the growth of the after-tax contributions to occur within the 401(k) where they avoid immediate taxation.  The second way is by sending your after-tax contributions to your Roth IRA when you retire, where the money can grow tax-free during retirement.


To do this, you would roll over your entire 401(k) balance. Everything except your after-tax contributions would be rolled into a traditional IRA and the after-tax contributions get rolled into a Roth IRA.  If executed properly, the entire rollover is a tax-free event. 

While not as powerful as making in-service withdrawals, this method allows you to get more into a Roth than you otherwise could have by directly contributing to a Roth IRA or Roth 401(k). 


Is the Mega Backdoor Roth Right for You?


The Mega Backdoor Roth strategy is ideally suited for high earners. Additionally, long-term investors who can benefit from tax-free growth over an extended period will find this strategy particularly advantageous. If you have the financial flexibility to make significant after-tax contributions, the Mega Backdoor Roth can be a powerful tool in your retirement planning arsenal.


Taking Action: Charting Your Mega Backdoor Roth Course


Research Your 401(k) Plan


The first step in implementing the Mega Backdoor Roth strategy is to confirm if your 401(k) plan allows after-tax contributions and in-service withdrawals. Ideally, the answer to both of these questions would be yes but you can still proceed even if the plan doesn’t allow in-service withdrawals.


If your plan allows in-service withdrawals, you should also find out if they limit the frequency of such withdrawals.


Finally, it is important to understand your company’s specific 401(k) plan.  Most 401(k) plan administrators must take precautions so that the plan doesn’t disproportionately benefit the high-income earners or owners of the company.  If that is the case in your company, your plan contributions may be limited even if the plan allows after-tax contributions. 


In Conclusion: Mega Backdoor Roth - A Powerful Tool, But Use It Wisely


The Mega Backdoor Roth 401(k) strategy offers a unique opportunity to maximize your retirement savings and enjoy the benefits of tax-free growth and withdrawals. It can be a game-changer for high-income earners and long-term investors. It allows you to break through traditional contribution limits, enjoy tax-deferred and tax-free growth, and benefit from tax-free withdrawals in retirement. However, it's crucial to proceed with caution, thorough research, and professional guidance. With the right approach, the Mega Backdoor Roth can be a powerful tool in your retirement planning toolkit, helping you achieve a more secure and tax-efficient retirement.

 

 

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