As a Boeing employee, you have a powerful tool to build more wealth for retirement: the Boeing mega backdoor Roth. This strategy lets you save beyond the normal limits of your Boeing 401(k) plan. Here’s how it works.
Key Takeaways
The Boeing mega backdoor Roth lets employees make after-tax contributions to the Boeing 401(k), then convert those funds to Roth.
Using this strategy, employees can invest beyond the usual deferral limits for a traditional 401(k) account.
Once the after-tax contributions are converted to Roth, future growth can be tax-free, and qualified withdrawals are tax-free.
What Is the Boeing Mega Backdoor Roth?
The Boeing mega backdoor Roth is a strategy that lets employees contribute to a Roth account beyond standard 401(k) limits. After maxing out your regular pre-tax and/or Roth contributions, you can make additional after-tax contributions to the Boeing 401(k) up to a higher limit. Once those after-tax dollars are in your account, you can convert them to Roth, either through an in-plan conversion or a Roth IRA rollover. Once converted, the money operates like any other Roth account: your investments can grow tax-free, and qualified withdrawals will be tax-free.
How the Boeing Mega Backdoor Roth Works
The mega backdoor Roth works by using the after-tax contribution option inside the Boeing 401(k), then converting those contributions to Roth.
1. Max Out Your Regular 401(k) Contributions
First, contribute as much as you want through your normal 401(k) contributions. In 2026, the IRS limit for employee contributions is $24,500, with additional catch-up contributions also available for employees age 50 and older. For eligible nonunion employees, Boeing will then match contributions dollar-for-dollar up to 10% of eligible pay.
2. Make Additional After-Tax Contributions
Once you reach the regular contribution limit, Boeing lets you add more money to your 401(k) through after-tax contributions. Before conversion, these contributions do not have the full benefits of a Roth account. Unlike Roth funds, any earnings made through basic after-tax investments are taxable. This removes the primary tax advantage of investing in a Roth account: tax-free growth and withdrawals.
This is where the mega backdoor Roth comes in…
3. Convert the After-Tax Money to Roth
After the after-tax contributions enter your 401(k), you can convert them to Roth. Depending on the option you use, this can be done through an in-plan Roth conversion or by rolling eligible funds into a Roth IRA. Because you already paid income taxes on the original contribution, that amount is not taxed again when it is converted.
Note: Any earnings that accumulate before conversion will be taxable when you convert. To solve this, Boeing lets you set up automatic conversions for recurring after-tax contributions. This minimizes the opportunity for taxable earnings to grow before conversion.
4. Let Your Roth Funds Grow
Once the money has been converted, it receives Roth tax treatment. Your investments can grow tax-free, and qualified withdrawals will also be tax-free.
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How Much Can I Invest in My Mega Backdoor Roth?
Every year, the IRS sets limits for employee 401(k) contributions ($24,500 in 2026). But there is another, higher limit, which covers the total amount of money that can be invested in a 401(k) account. In 2026, that limit is $72,000. That number includes:
Regular employee contributions (both pre-tax and Roth)
Additional after-tax contributions
Once you’ve maxed out your regular contributions and received the employer match, you can fill the gap between that figure and the $72,000 total limit with after-tax contributions. That gap is the seed for the mega backdoor Roth.
For example, let’s say you earn $150,000 and contribute the full $24,500 to your Boeing 401(k). If Boeing contributes another $15,000 via its 10% match, you have used $39,500 of the $72,000 limit. That leaves $32,500 in room for the mega backdoor Roth.
Note: Catch-up contributions don’t count toward the $72,000 limit, so they are not relevant for this calculation.
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Benefits of the Mega Backdoor Roth for Boeing Employees
For Boeing employees who are already saving for retirement, the mega backdoor Roth can provide several benefits.
1. Higher Contribution Limits
While regular 401(k) contributions are capped at a lower figure, the mega backdoor Roth opens the door to tens of thousands in additional savings. Through strategic investments and compound growth, that figure can get even higher.
2. More Tax Flexibility in Retirement
Withdrawals from traditional pre-tax 401(k) accounts are taxable, while qualified Roth withdrawals are tax-free. Building both types of savings can give you more flexibility to manage your taxable income in a given year. With more Roth savings on hand, you’ll have even more flexibility.
3. No Income Limits
Direct Roth IRA contributions are restricted once your income exceeds IRS thresholds. A mega backdoor Roth has no such income limits, giving even high-earners access to more Roth benefits.
4. No Required Minimum Distributions
Unlike traditional pre-tax savings accounts, Roth accounts are not subject to required minimum distributions (RMDs) during the life of the owner. This gives you more control over when and how much you withdraw in retirement.
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Mega Backdoor Roth vs. Boeing SSP
Another common option for Boeing employees who want to exceed their 401(k) limit is the Boeing Supplemental Savings Plan (SSP). This is a nonqualified deferred compensation plan that lets eligible employees invest additional funds after maxing out their Boeing 401(k). While the SSP has some similarities to the mega backdoor Roth, there are several important differences.
The Mega Backdoor Roth…
Uses after-tax contributions: You pay income tax on the money before contributing it in return for tax-free growth and withdrawals.
Keeps your savings in protected retirement accounts: Money contributed to the mega backdoor Roth remains in the 401(k) or can be moved to a Roth IRA. Either way, the funds are protected and kept separate from Boeing’s assets.
Provides withdrawal flexibility: Once your Roth savings have matured, you can withdraw them at any time and in any amount. Alternatively, you can leave them in place indefinitely, since Roth accounts are not subject to RMDs.
The Boeing SSP…
Uses pre-tax deferred compensation: Money directed to the SSP reduces your taxable income in the year it is deferred, though withdrawals will be taxed as ordinary income later (just like a traditional 401(k)).
Carries some creditor risk: SSP benefits are paid from Boeing’s general assets rather than being held separately in a qualified retirement-plan trust. In the unlikely event that Boeing were to declare bankruptcy, your savings could be at risk to satisfy the company’s debts.
Uses a predetermined distribution schedule: When you enroll in the SSP, you will choose how you want your savings to be distributed to you later. Once this election is made, it cannot be changed, giving you less flexibility than the mega backdoor Roth.
Both strategies have their pros and cons. If you’re not sure which option is right for you, a fiduciary financial advisor can help you make the right choice.
Need Help with Your Boeing Mega Backdoor Roth? Let’s Talk!
By making use of your Boeing mega backdoor Roth, you can give yourself a better nest egg for your golden years. However, retirement planning is nothing if not complicated. We’d be happy to take care of the hassles for you!
At TrueWealth Financial Partners, we give Boeing employees the financial advice they need to increase their savings and retire in peace. Schedule a call today, and we’ll be happy to answer any questions you have.
We’re looking forward to hearing from you!