Masters in Business

At The Money: How to Max Out Your Small Business Retirement Plan

15 min
Apr 29, 2026about 1 month ago
Listen to Episode
Summary

This episode explores retirement savings strategies for small business owners and solo practitioners, comparing SEP IRAs, solo 401(k)s, and mega backdoor Roth options. Host Barry Ritholtz and guest Dan LaRosa from Ritholtz Wealth Management break down contribution limits, income thresholds, compliance requirements, and creditor protections to help business owners maximize tax-deferred retirement savings.

Insights
  • Each retirement plan has its own $72,000 contribution limit; the $24,500 employee deferral is the only component that aggregates across multiple plans, allowing side hustlers to dramatically increase household retirement savings
  • Solo 401(k)s offer superior flexibility for lower-income business owners and those seeking Roth contributions, while SEPs are simpler but require pro-rata contributions across all participants
  • Solo 401(k)s lack ERISA creditor protections despite being 401(k)s because they cover no non-employees, making them equivalent to IRAs in litigation scenarios
  • Form 5500-EZ filing becomes mandatory once solo 401(k) assets exceed $250,000, with penalties of $250/day up to $150,000 for non-compliance—a recently enforced requirement
  • Adding a spouse as a legitimate payroll employee to a solo practice can supercharge household retirement contributions by up to $32,500 annually (age 50+) through their own solo 401(k)
Trends
Increased complexity and regulatory enforcement in small business retirement planning, particularly around Form 5500-EZ filing penaltiesGrowing adoption of mega backdoor Roth strategies among side hustlers and solo practitioners seeking tax-free growth opportunitiesRising awareness that solo 401(k)s lack ERISA protections, driving professionals in litigious fields to explore defined benefit plansShift toward more flexible retirement plan structures as business ownership models become more diverse (side hustles, multiple partners, spouse employment)Expansion of solo 401(k) setup timelines, allowing retroactive funding through October 15th if established by April 15th of the tax year
Companies
Ritholtz Wealth Management
Dan LaRosa runs the corporate retirement planning group and is a partner at this firm, which provides retirement plan...
People
Dan LaRosa
Expert guest discussing retirement plan options, contribution limits, and compliance requirements for small business ...
Barry Ritholtz
Host of Masters in Business/At The Money podcast, conducts interview on small business retirement planning
Quotes
"Each plan has its own $72,000 limit. The only thing that aggregates across all plans is the $24,500 employee deferral limit."
Dan LaRosa
"The mega backdoor Roth, it's a bit of a cheat code. As long as your net income is $72,000, you can contribute all of that into the solo 401k."
Dan LaRosa
"Solo Ks because they are 401ks also have this enhanced creditor protection. They do not. Because they don't cover any non employees, they don't qualify for that extra ERISA protection."
Dan LaRosa
"This is an enormous way to accumulate wealth over the next 10 or 20 years and have various options of whether this goes in pre-tax or post-tax that allows you to maximize your long-term returns."
Barry Ritholtz
"Adding your spouse to your solo practice retirement plan is an easy way to kind of supercharge your household savings."
Dan LaRosa
Full Transcript
Today's show is brought to you by Vanguard. To all the financial advisors listening, let's talk bonds for a minute. Capturing value in fixed income is not easy. Bond markets are massive and murky. Lots of firms throw a couple of flashy funds your way and call it a day. Vanguard takes a different approach. The Vanguard lineup includes over 80 bond funds actively managed by a 200-person global squad of sector specialists, analysts, and traders. Lots of firms love to highlight their star portfolio managers like it's all about that one brilliant mind that makes the magic happen. Vanguard's philosophy is different. They believe the best active strategy shouldn't be one person. It should be shared across the team. So if you're looking to offer your clients funds that are built to deliver consistent results, go see the record for yourself at Vanguard.com slash audio. That's Vanguard.com slash audio. All investing is subject to risk. Vanguard Marketing Corporation distributor. If you ever get annoyed, come to me, I'm self-employed. I love to work at nothing all day. And I've been taking care of business every day. Taking care of business every way. I've been taking care of business. It's all mine. Taking care of business and working overtime. Saving for retirement is challenging, especially if you're a small business owner or solo practitioner. Various retirement plans like SEP, solo Ks, mega backdoor Roths can really be confusing. There are so many choices, the options have increased, and the rules have become even more complex. To help us unpack all of this and what it means for your retirement portfolio, let's bring in Dan LaRosa. He is an expert in corporate qualified retirement accounts, working with clients all over the country. Full disclosure, Dan runs the corporate retirement planning group at the Ritholtz Wealth Management, my firm, and he's one of my partners. So, Dan, let's start basic. What options exist for either solo or small business owners if they want to save more money for retirement on a tax-deferred basis? Sure, Baris. The main options, or at least the options that you'll more likely than not start with, are a SEP IRA or a solo 401k. A lot of people default to a SEP, even if you're in a situation where the solo K might actually be a better option. The SEP is just simpler, and it's often the first thing that your CPA is going to mention to you or recommend. Solo 401k with a mega backdoor Roth feature has also gotten more popular in recent years. And once you have one of those in place, if you're still looking for more tax deferral opportunities, a defined benefit cash balance plan might be a good fit. Really, really interesting. Now, last time when we talked about mega backdoor Roth, the total you can contribute if you're working for a firm is $72,000. But these days, so many people have side hustles. They set up an LLC or a little company to do something, and maybe they're a solo practitioner. Maybe it's a husband and wife, and this is income beyond what their regular paycheck is. If you maxed out your mega backdoor Roth at your regular employer and you have this side gig, how much can you add above that $72,000? Yeah, a lot of people don't realize this, but each plan has its own $72,000 limit. The only thing that aggregates across all plans is the $24,500 employee deferral limit. That's the amount of money that each of us can contribute to our 401k plan. But each plan has a $72,000 limit. So what you can do if you have a side hustle or a solo gig, you can set up a solo 401k with a mega backdoor Roth or even just a regular solo K or a SEP. As long as your income is high enough, you can make additional contributions into that retirement plan of up to And how do they figure out the Is that based on over 145 or 150 a year or is there a percentage calculation Where does that 72 number come from Yeah, well, the 72,000 number is just the overall 401k limit, right? Or retirement plan limit. The SEP actually has the same limit. But how to get there is a bit of a loaded question. And it's different for each of those plans. So the SEP, the SEP IRA is technically all employer contributions. So your contribution amounts are directly tied to your earnings. All right. So you can contribute up to 20% of your net income to get to that $72,000 number. All right. So you do the math. You need an income of $360,000 to max out and get to that $72,000. All right. The solo K, only a portion of your contribution is tied to your income. so you can contribute a lot more on a lower income. An income of about $235,000, $240,000 will get you to that $72,000 max. The mega backdoor Roth, it's a bit of a cheat code. As long as your net income is $72,000, you can contribute all of that into the solo 401k. What are the trade-offs between the SEP IRA, the solo 401k, the solo mega backdoor Roth? It sounds like this is really complex. Are there any advantages or disadvantages to each of these? yeah it is complex and that's why a lot of people just kind of default to a set because it's easier but it really depends on your income and your objectives if your income is on the lower side or maybe it varies from year to year the solo k is going to certainly allow the most flexibility and let you maximize your contribution even in those lower income years uh if roth contributions are the objective you just can't beat the solo k with the mega backdoor roth it's gonna again and allow you to contribute up to 72,000 in Roth contributions. You can't find that anywhere else. But if your income is consistently high and Roth is not a priority, you just want to maximize your tax deferrals, then a SEP is going to get the job done. So if you're making 100 or less or 250 or more or a million or more, that may affect which of these you choose. Yeah, for sure. And again, assuming let's work with the assumption that you want to maximize your contributions, you want to contribute as much as you can. The lower your income is, the more powerful the solo 401k is, right? You're just going to have a lot more flexibility with your contributions. And the higher your income goes, you're fine with a SEP because that 20% of your net income, if your income is high enough, again, over 350, 360, you're going to be putting 70,000 plus away a year. Really intriguing. How do you count an employee if you're solo 401k? It doesn't matter if you're 1099 or W-2 or part-time or spouse, a husband and wife own a small business. Who counts as an employee for these? The solo 401k is easy. So once you have a W-2 employee that becomes eligible, it's no longer a solo K and it's going to be hard for the owner to max out without contributions to that employee. The SEP is a little bit different. Eligibility requirement is referred to of the three of five rules. So once you have an employee that's worked three out of any five years earning more than something nominal, I think 700 or $750, they're eligible. And that means they would receive the same percentage of compensation that you're giving yourself. So that could get expensive in a hurry. As far as a spouse being classified as an employee, you can have your spouse in the solo K and still run the solo K. You're not going to be disqualified. Your spouse counts as another owner. Also, a lot of people don't realize that a solo K can have multiple partners in it. Right So in other words if a company has four different partners you can have all four partners and each of the spouses in the solo K as long as there are no non employees you good to go And that per person husband and wife Per person. Again, assuming the income allows for it, but yes. Really, really intriguing. Man, let's talk about the administration and compliance burdens of these various options. I know you need plan documents and then there's the infamous form 5500 and there are all sorts of record keeping rules. What do small businesses have to know? How do they avoid getting tripped up by all of this? Yeah, the SEP is the easiest for sure. It's just a few forms to set up and there's no annual maintenance, no filings. Owner just needs to track their contributions. With the solo 401k, there is a little more. And the biggest thing is once the plan reaches a total of $250,000 in total plan assets on December 31st of any plan year, a form 5500EZ must be filed. All right. That's basically the tax return for the plan. it's a really simple form, but the penalties are insane. It's $250 a day up to $150,000. So for a very long time, this really wasn't regulated. But in recent years, we've actually really seen an uptick in enforcement of these penalties. So shouldn't prevent you from setting up a solo K, but it's very important to be aware of this when you set the plan up. So let's talk setup and funding. When do these plans need to be set up and funded by? We're recording this in February of 2026. Is it too late to set something up and fund it for 2025? What are the options? What does the timing look like? Yeah, no, you still have plenty of time. The SEP is an IRA. So just like any other IRA, it's always been able to be established and funded for a prior year. you have until tax filing plus extension to get that plan funded. Effective, I believe effective last year, the solo K got a lot more lenient and kind of follows that same path as the SEP. So you can establish a solo K and funded for the prior year with some caveats. If the plan is set up by April 15th, let's say for this year, the plan is set up by April 15th of 2026, you can make employee and employer profit sharing contributions. So you can get to that full $72,000 as long as you fund by the extended filing deadline of October 15th of this year. If you set up the plan after April 15th of this year, you can only make your employer contributions, your profit sharing contributions to it. So you're going to be a little more limited to how much you can fund. Let's talk about succession planning or exit planning or with a husband and wife, the death of a spouse. Are there any one structure superior to others? If the owner either expects to sell the business or retire, or maybe even bring in partners, which is the most flexible here? The solo case is always going to give you more flexibility than the SEP. If there's multiple partners in the solo case, they can each contribute different amounts or some not at all. In a SEP, contributions are pro rata, so everyone has to get the same percentage of comp. So obviously not ideal if there are going to be multiple partners or people with different goals involved. On the other hand, SEPs are just structurally a lot simpler, easier to unwind if necessary. So one isn't always going to be better than the other. It really depends on the situation. So one of the advantages of 401ks is the creditor and ERISA protections. Even if you lose litigation, nobody can take your retirement money away. Do the same things apply to the SEP or solo 401ks? Is it really the same set of rules? Yeah. So what you're talking about with 401ks is that additional ERISA protection. So ERISA plans, which are your employer 401ks and defined benefit plans have the most credit or protection of all qualified plans It is a common misconception that solo Ks because they are 401ks also have this enhanced creditor protection They do not Because they don cover any non employees, they don't qualify for that extra ERISA protection. So, SEPs and solo Ks are on the same level in terms of creditor protection, the same as a regular IRA. If you are in a litigious profession and that protection is important, might be a good idea to roll some of those IRA or solo K balances into your employer 401k or defined benefit plan if you have one available. That is really interesting. I would imagine doctors or I remember back in the day, brokers used to get sued on a regular basis. So that seems to be worthwhile. Last question. So if you have a business owner that's married, whether or not the spouse works for them in the business, can that spouse also open either a solo 401k or SEP or mega backdoor Roth 401k and legitimately increase the household contribution, assuming the revenue allows for it? yeah as long as your spouse is a legitimate employee of your solo practice you can do that and it has tremendous benefits but they have to be an employee on payroll receiving wages right um so okay allows you to contribute a lot even on a low income right so a spouse would be able to actually contribute a hundred percent of their compensation up to that 24 and a half thousand or if you're over 50, 32 and a half, right? So that ends up quickly. It's an easy way to kind of supercharge your household savings is adding your spouse to your solo practice retirement plan. Really, all this stuff is so intriguing and it's just another tool in the toolbox. To wrap up, if you're a small business owner or solo practitioner and you haven't taken advantage of the various tax-deferred retirement savings plan, whether it's a SEP, a solo 401k, a mega backdoor Roth 401k, speak to your fill in the blank, financial advisor, accountant, tax professional, and get hopping on this. This is an enormous way to accumulate wealth over the next 10 or 20 years and have various options of whether this goes in pre-tax or post-tax that allows you to maximize your long-term returns. I'm Barry Ritholtz. You're listening to Bloomberg's At The Money. And I've been taking care of business every day. Taking care of business every way. I've been taking care of business. It's all mine. Taking care of business and working overtime. Today's show is brought to you by Vanguard. To all the financial advisors listening, let's talk bonds for a minute. Capturing value in fixed income is not easy. Bond markets are massive and murky. Lots of firms throw a couple of flashy funds your way and call it a day. Vanguard takes a different approach. The Vanguard lineup includes over 80 bond funds actively managed by a 200-person global squad of sector specialists, analysts, and traders. Lots of firms love to highlight their star portfolio managers like it's all about that one brilliant mind that makes the magic happen. Vanguard's philosophy is different. They believe the best active strategy shouldn't be one person. it should be shared across the team. So if you're looking to offer your clients funds that are built to deliver consistent results, go see the record for yourself at vanguard.com slash audio. That's vanguard.com slash audio. All investing is subject to risk. Vanguard Marketing Corporation distributor. As markets move and headlines break, what matters most is context. A Bloomberg subscription gives you unmatched reporting, sharp analysis, and powerful tools that help you connect the dots. Visit bloomberg.com slash podcast offer to learn more.