PayPal’s Mega Backdoor Roth 401(k): The Hidden Gem of Your Retirement Plan

By Cecil Staton, CFP® – Arch Financial Planning

If you’re a high-income software engineer or stock-compensated employee at PayPal, chances are you’re already maxing out your 401(k) and building wealth through RSUs and ESPP. But what if you could double or even triple your tax-advantaged retirement contributions each year?

Enter: the Mega Backdoor Roth 401(k) — one of the most powerful but underutilized retirement savings strategies available to high earners.

Let’s break down how it works, how to coordinate it with your other PayPal benefits, and how to avoid common mistakes that could trigger unnecessary taxes.

---

What Is the Mega Backdoor Roth 401(k)?

The Mega Backdoor Roth allows you to contribute after-tax dollars into your employer plan above the regular 401(k) limits — and then convert those funds to a Roth account, either within the plan (in-plan Roth conversion) or via an in-service distribution to a Roth IRA.

For 2025, the total contribution limit to a 401(k) plan is $70,000 (or $77,500 if you’re age 50+ and eligible for catch-up contributions). This includes:

• $23,500 in traditional pre-tax or Roth contributions

• Employer match (typically a % of salary)

• Non-Roth after-tax contributions (the key to the Mega Backdoor Roth)

The strategy hinges on contributing additional after-tax dollars and then quickly rolling them into a Roth IRA or Roth 401(k) to take advantage of tax-free growth.

---

Does PayPal Support the Mega Backdoor Roth Strategy?

Yes — PayPal’s 401(k) plan does allow non-Roth after-tax contributions and in-plan Roth conversions, making it eligible for Mega Backdoor Roth conversions. That means you can fund far beyond the standard limits if you have the income and cash flow by making in-service withdrawals and in-plan Roth rollover transactions to complete the mega backdoor Roth.

But it’s not just about making the contribution. You need to understand the plan document, coordinate with the plan administrator, and make sure you execute the in-plan conversion or in-service rollover correctly to avoid taxable income or double-taxation on your investment earnings.

---

Actionable Tip: Coordinate with Your RSUs and ESPP

If you receive restricted stock units (RSUs) at PayPal, you’re likely seeing a significant spike in ordinary income on vesting dates. Similarly, participating in the employee stock purchase plan (ESPP) can create taxable events if shares are sold at a gain.

Here’s how to align your equity compensation with your Mega Backdoor Roth strategy:

• Time your Roth conversion to avoid pushing yourself into a higher tax bracket in the same year as a big RSU vest.

• Use extra cash from ESPP sales or RSU liquidation to fund after-tax contributions into your employer plan.

• Avoid “double concentration” by not holding too much PayPal stock in both your ESPP and 401(k) plan while trying to invest after-tax dollars — diversify where possible.

---

Example: Maximizing the PayPal 401(k) as a High Earner

Let’s say you’re a high-income employee with a $250,000 base salary, and you’re already:

• Contributing $23,500 to your traditional or Roth 401(k) if under age 50

• Receiving ~$10,000 in employer contributions

• Still have room under the $70,000 total limit

That $36,000 could be contributed as after-tax dollars into your 401(k), and then converted to Roth — potentially tax-free — assuming your investment earnings are minimal or you convert quickly.

Now imagine doing that every year on an annual basis. Over a decade, that’s potentially $360,000+ in Roth funds — compounding tax-free.

---

Common Pitfalls to Avoid

1. Not Converting After-Tax Contributions Quickly

Leaving your after-tax contributions in the plan without converting them can lead to taxable growth. Act quickly to perform an in-plan Roth conversion or an in-service withdrawal to a Roth IRA.

2. Failing the ACP Test

Highly compensated employees must watch for nondiscrimination testing (like the ACP test). If you contribute too much and lower-paid employees don’t participate, you may be subject to refunds of your after-tax contributions.

3. Overlapping With a Backdoor Roth IRA

If you’re also doing a Backdoor Roth IRA conversion, be cautious. Having pre-tax IRA balances can cause pro-rata rule complications. We typically recommend keeping traditional IRA accounts empty when using these advanced strategies.

---

Tax Planning Considerations

High-income individuals often phase out of traditional Roth IRA contributions due to income limits. The Mega Backdoor Roth strategy is one of the few ways to sidestep those limits legally.

Pair this with:

• Maxing your HSA if eligible

• Traditional pre-tax 401(k) contributions to lower taxable income

• Gifting appreciated assets or donor-advised fund strategies for tax mitigation

And you can significantly reduce your taxable income, increase retirement security, and build diversified qualified retirement plans that work together.

---

Is the Mega Backdoor Roth Right for You?

It depends on:

• Your income level and cash flow

• Your current tax rate vs. expected future tax rate

• Whether you already max out your 401(k), ESPP, and other benefits

• Your desire to build tax-free Roth assets instead of traditional pre-tax ones

• Whether your plan supports in-plan Roth conversions or in-service distributions

This is where working with a financial advisor who understands the full scope of your employer retirement plan, RSUs, ESPP, and tax strategy becomes invaluable.

---

Frequently Asked Questions About PayPal’s 401(k) Plan

What is the 401(k) plan offered by PayPal?

PayPal offers a robust 401(k) retirement savings plan that allows employees to contribute a portion of their salary on a pre-tax or Roth basis. Contributions grow either tax-deferred or tax-free, depending on the type of contribution. The plan also supports after-tax contributions, enabling high-income earners to take advantage of Mega Backdoor Roth conversions.

How does PayPal match employee contributions to the 401(k) plan?

PayPal provides an employer match on employee 401(k) contributions. While the exact percentage can vary, the match is a percentage of your eligible compensation and can help you accelerate your retirement savings. This employer contribution counts toward the annual contribution limit of $69,000 (or $76,500 if age 50+).

Does PayPal offer a Roth 401(k) option?

Yes. PayPal offers a Roth 401(k) option, which allows you to make after-tax contributions that grow tax-free. This is separate from the Mega Backdoor Roth strategy, which uses non-Roth after-tax contributions for larger conversions.

Can employees at PayPal choose how to invest their 401(k) contributions?

Yes. PayPal’s 401(k) plan offers a selection of mutual funds, index funds, and target-date funds through its retirement plan provider. Employees can allocate their contributions across these investment options based on their risk tolerance and retirement timeline.

What is the eligibility requirement for PayPal’s 401(k) plan?

Most employees are eligible to participate in the 401(k) plan shortly after joining the company. It’s best to confirm eligibility and enrollment timelines with your plan administrator or HR representative.

How can PayPal employees enroll in the 401(k) plan?

Employees can enroll in the 401(k) plan through the company’s benefits portal or by contacting the plan sponsor or service provider. During enrollment, you’ll choose your contribution type (pre-tax, Roth, or after-tax) and investment allocations.

What is the maximum contribution limit for PayPal employees under the 401(k) plan?

In 2025, the IRS allows you to contribute:

• $23,500 in pre-tax or Roth contributions

• An additional $7,500 if you’re age 50 or older (catch-up contributions)

• Combined with employer contributions and after-tax contributions, your total can reach $70,000 (or $77,500 if 50+)

Does PayPal support the Mega Backdoor Roth 401(k) strategy?

Yes. PayPal’s plan permits after-tax contributions and in-plan Roth conversions, making it eligible for Mega Backdoor Roth strategies. This allows you to contribute significantly more than the standard IRS limits and grow your Roth account on a tax-free basis.

What happens to my PayPal 401(k) if I leave the company?

If you leave PayPal, you typically have several options:

• Leave the funds in the plan

• Roll them into a new employer’s qualified plan

• Roll over to a Traditional IRA or Roth IRA

• Cash out (though this may trigger taxes and early withdrawal penalties)

You can also roll over after-tax contributions to a Roth IRA, which is often part of an ongoing Mega Backdoor Roth strategy.

Can PayPal employees take loans against their 401(k) savings?

Yes. PayPal’s 401(k) plan generally allows loans against your vested account balance. However, loans must be repaid with interest, and failure to repay could result in taxes and penalties. Loans are not allowed from after-tax balances earmarked for Roth conversions.

Why Work With Arch Financial Planning?

At Arch Financial Planning, we specialize in working with tech professionals at firms like PayPal. We bring deep expertise in equity compensation, tax optimization, and long-term financial planning—helping you take full advantage of your benefits while aligning your plan with what matters most to you.

---

Ready to Maximize Your PayPal Benefits?

Whether you’re trying to manage RSU taxes, contribute more to your 401(k), or build a roadmap for early retirement, we’re here to help.

🚀 Work with a financial planner who understands PayPal benefits.

📅 Schedule a call today, and let’s create a custom plan to help you build wealth, reduce taxes, and retire early.