How to Put Up to $72,000 Into a 401(k) - Legally

Written By: Dan PasconeMarch 4, 2026

Answer Box (TL;DR)

TL;DR: If you’re a high-earning executive maxing your 401(k) deferrals and stopping there, you may be leaving meaningful tax-advantaged capacity unused. In many plans, the real ceiling is the annual additions limit (often far higher than your employee deferral limit), and the Mega Backdoor Roth is the step-by-step process to move after-tax 401(k) contributions into Roth as quickly as your plan allows. This video shows how to check plan eligibility, set it up early in the year, and avoid the execution mistakes that turn “tax-free growth” into a tax headache.

Key Takeaways

$24,500 isn’t always the real limit: The employee deferral cap is only one piece some plans also allow after-tax employee contributions up to the plan’s annual additions limit.
This isn’t a loophole it’s plan design: The Mega Backdoor Roth only works if your employer plan has the right features (and clean recordkeeping).
After-tax ≠ Roth: After-tax contributions left sitting can generate taxable earnings. The “Mega Backdoor” is about converting/rolling those after-tax dollars to Roth quickly.
Q1 setup matters: Payroll mechanics drive the strategy. Waiting until Q4 usually means you’ve already lost most of the year’s capacity.
Protect the match: Front-loading deferrals can reduce matching in plans without a “true-up” feature.
Contribute, convert, track, adjust: Systematic execution + a midyear audit is what keeps the strategy clean.

Key Moments

00:00–01:33 — The “real” ceiling and why waiting until Q4 breaks the strategy
01:57–03:56 — The 3 “tanks” inside a 401(k) and the 2 Mega Backdoor pathways
03:56–05:37 — The three green lights your plan must have
05:37–10:51 — The 6-step execution plan (capacity, match, payroll, conversions, paperwork, midyear audit)
10:51–12:29 — Roth “order of operations” for high earners (match → max deferrals → backdoor Roth IRA → mega backdoor)
12:29–14:47 — Common mistakes + hidden traps (testing refunds, annual cap overshoot, sloppy reporting)

Episode Summary

If you’re a high earner maxing your 401(k) at the employee deferral limit and assuming you’re done, this video challenges that assumption. Dan breaks the 401(k) into three “tanks” (pre-tax deferrals, Roth deferrals, and after-tax employee contributions) and explains why the Mega Backdoor Roth depends on a specific plan feature: after-tax contributions plus a way to convert or distribute those after-tax dollars into Roth.

The core idea is simple: after-tax contributions are not automatically “tax-free.” If they sit, their earnings can become taxable. The solution is a clean, repeatable process set after-tax payroll elections early (ideally in Q1), convert on a consistent cadence (per paycheck if possible), and track paperwork to ensure the conversion is mostly basis with minimal earnings. Dan also calls out the execution risks that derail this strategy assuming your plan supports it, losing employer match without a true-up, overshooting the annual additions cap due to unexpected employer contributions, and plan testing refunds for highly compensated employees.

Bottom line: if your plan supports it and you execute it systematically, the Mega Backdoor Roth can be a powerful way to build long-term tax-free flexibility especially for executives facing future tax-rate uncertainty.

Transcript

(00:00) If you're a high earning executive that's maxing out your 401k at 24,500 and thinking that you're done, well, you're leaving tens of thousands of dollars of tax-free growth on the table. For many corporate plans, that 245 isn't the ceiling. The real limit is actually 72,000. But here's the problem.

(00:24) Most people who try to access that extra capacity either mess up the execution, trigger unexpected taxes, or assume that their plan supports it when it doesn't. And if you wait until the fourth quarter to figure this out, then you've already lost most of the year. Today, I'm walking you through the mega backdoor rock step by step.

(00:45) How to check if your plan allows it, how to set it up in Q1 when it actually matters, and how to avoid the three mistakes that turn tax-free money into a tax headache. I'm Dan Pasone, founder of Tailored Wealth, and I work with executives and business leaders who are navigating complex compensation structures, high tax exposure, and the challenge of turning income into actual financial independence.

(01:12) And the mega backdoor Roth is one of the most powerful tools available to high earners, but it's also one of the most misunderstood. It's not a loophole. It's a plan feature. And whether you can use it depends entirely on what your employer's 401k allows. And the reason why Q1 matters is simple. The strategy runs on payroll mechanics.

(01:33) You can't backfill your contributions in December, so you can't fix it retroactively. So, if you don't set up the system now with the right elections and the right conversion cadence, then you'll get to year end and realize that you've left somewhere between 30 to 50k of tax-free capacity unused. So, let's make sure that doesn't happen.

(01:57) First, let's get the definitions right because this is where most of the confusion starts. Your 401k isn't just one bucket. It's three separate tanks and each one has a separate tax treatment...

(03:22) And there are two pathways to that. Path one is the inplan Roth conversion... Path two is the inservice distribution to a Roth IRA...

(03:56) Not every plan allows for both pathways... Before you do anything else, you need three green lights...

(05:37) Now, let's walk through the actual execution. This is a six-step process, and every step matters...

(10:51) Now, let's talk about how this fits into your overall Roth strategy... Here's the order of operations that makes sense for most people...

(12:29) Now, let's talk about what goes wrong... Mistake number one is confusing the mega backdoor Roth with a backdoor Roth IRA...

(16:23) You can download it in the link below. Thanks for watching, and I'll see you in the next one.

Note: Full transcript provided above by you; I kept timestamps and lightly condensed a few repeated phrases for readability while preserving meaning. If you want 100% verbatim formatting, paste confirmation and I’ll keep every line exactly as-is.

Resources & Citations

IRS — 2026 elective deferral limit (401(k)/403(b)/457): IRS newsroom release
IRS — 2026 annual additions limit (Section 415(c)): IRS Notice (PDF)
IRS — Rollovers of after-tax contributions (Notice 2014-54 concepts): IRS guidance page
IRS — Notice 2014-54 (PDF): Notice 2014-54
Video on YouTube: How to Put Up to $72,000 Into a 401(k) - Legally

FAQ

How can someone legally put up to $72,000 into a 401(k)?

Some employer plans allow total contributions up to the IRS “annual additions” limit (often higher than the employee deferral limit). That total can include employee deferrals, employer match/profit sharing, and after-tax employee contributions. The Mega Backdoor Roth is the process of moving those after-tax contributions into Roth so future growth can be tax-free subject to plan features and proper execution.

What’s the difference between a Backdoor Roth IRA and a Mega Backdoor Roth?

A Backdoor Roth IRA is typically a non-deductible contribution to a traditional IRA followed by a conversion to Roth (and can be impacted by IRA pro-rata rules). A Mega Backdoor Roth generally uses after-tax contributions inside a 401(k) and then converts/rolls them to Roth through either an in-plan Roth conversion or an in-service distribution, depending on what your employer plan permits.

What plan features do I need for a Mega Backdoor Roth to work?

You generally need (1) the plan to allow after-tax employee contributions (not just Roth deferrals), (2) a way to move those after-tax dollars to Roth via in-plan conversion or in-service distribution, and (3) clean recordkeeping so after-tax basis is tracked and processed correctly. If you’re missing any one of those, the strategy may not work or may not be worth the administrative burden.

Why does converting quickly matter?

After-tax contributions themselves are “basis,” but any earnings that occur before conversion/rollover can be taxable. Converting frequently (ideally each paycheck if your plan supports automatic in-plan conversions) helps minimize taxable earnings so the transfer is mostly basis. Coordinate with your tax team and plan provider to confirm how your plan processes conversions and reporting.

How do I avoid losing my employer match if I’m maxing contributions early?

If your plan matches per paycheck and you stop contributing after you hit your deferral limit, you may miss match later in the year unless the plan offers a “true-up.” If there’s no true-up, you may need to spread deferrals across the year to keep match flowing. Plan rules vary, so confirm with HR/your plan administrator.

What are the most common mistakes executives make with the Mega Backdoor Roth?

Three big ones: (1) assuming their plan supports after-tax contributions and in-service conversion/rollover when it doesn’t, (2) leaving after-tax money sitting and allowing taxable earnings to build before conversion, and (3) sloppy paperwork/reporting on rollovers. Also watch for plan testing refunds for highly compensated employees and the risk of exceeding the annual additions cap if employer contributions come in higher than expected.