--- title: "Solo 401(k) Form 5500-EZ Rules: Avoid IRS Penalties Up to $150,000 | VIP Wealth Advisors" description: Did you know a Solo 401(k) over $250,000 triggers a Form 5500-EZ filing requirement? Missing it can cost up to $150,000 in IRS penalties. 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[Home](https://vipwealthadvisors.com/) 2. [insights](https://vipwealthadvisors.com/insights) 3. solo 401k form 5500ez mistake September 9, 2025 [Mark Stancato, CFP®, EA, ECA, CRPS®](https://vipwealthadvisors.com/insights/author/mark-stancato-cfp) # Solo 401(k) Owners: Don't Ignore Form 5500-EZ or Pay the Price ![Solo 401k Form 5500-EZ Mistake](https://vipwealthadvisors.com/hubfs/solo-401k-form-5500ez-mistake.jpg) Share this post: - - - ##### Share - - - For self-employed professionals and business owners, the Solo 401(k) is a retirement powerhouse. It allows massive contribution limits, the ability to make Roth deferrals, roll in old IRAs, and even take loans. For anyone running their own show, it's one of the most flexible and tax-efficient tools available. **But with great power comes one of the most overlooked compliance requirements in the tax code: Form 5500-EZ.** This form doesn't get talked about much because it isn't needed when your plan is small. Then one day, usually after a big IRA rollover or years of contributions and compounding, your plan crosses a line and suddenly you've got a filing requirement with real teeth behind it. Ignore it, and the IRS can hammer you with penalties so disproportionate that it feels medieval. Most Solo 401(k) owners have never even heard of this form until it's too late. Let's change that. ### What Is Form 5500-EZ? Form 5500-EZ is an annual return that the IRS and Department of Labor (DOL) use to track “one-participant retirement plans.” In plain English: retirement plans that cover only the owner and (if applicable) a spouse. For large employer plans, Form 5500 is the standard. For Solo 401(k)s, the simplified version — Form 5500-EZ — does the job. It provides basic information about the plan, assets, and contributions so regulators can ensure compliance. The form itself isn't complicated. It asks for things like: - Beginning and ending plan assets - Contributions made during the year - Distributions taken - Plan codes to identify features (profit sharing, Roth, rollover, etc.) Filling it out usually takes less than an hour. The issue isn't complexity; it's knowing when you're required to file and making sure you don't miss the deadline. ### When the Filing Requirement Kicks In Here's the rule in black and white: - You must file Form 5500-EZ if your Solo 401(k) had more than $250,000 in assets at the end of the plan year. - You must also file if the plan terminates, regardless of asset size. That's it. Those are the two triggers. For nearly everyone, the plan year is the calendar year, ending on December 31. That means the test is simple: look at your Solo 401(k) balance on December 31. If it's over $250,000, congratulations, you've got a filing requirement for that year. ### The Calendar and Deadlines Once the $250,000 threshold is crossed, the clock starts ticking. - **Deadline:** The filing is due on the last day of the seventh month after plan year-end. For calendar-year plans, that's July 31. - **Extension:** You can extend the deadline to October 15 by filing IRS Form 5558 by July 31. That extension is automatic if you submit the form on time. Miss the July 31 deadline without an extension, and technically, you're delinquent on day one. ### The Stakes: Penalties That Don't Mess Around **This is where the IRS shows its fangs. The penalty for late or missed 5500-EZ filings is $250 per day, up to $150,000 per return.** That's not a typo. $250 a day. $150,000 maximum. For a form that asks for little more than your plan's beginning balance, ending balance, and contribution amount. Now imagine someone with a Solo 401(k) that's been over $250,000 for five years and never filed. They could be facing theoretical penalties of well over six figures. The penalties are substantial, but eligible Solo 401(k) plans have a way to address missed filings through the IRS’s late-filer penalty relief program. The key is acting before the IRS issues a CP 283 penalty notice for the delinquent return. ### The Lifeline: IRS Late-Filer Penalty Relief For one-participant Solo 401(k) plans, the applicable program is the **IRS penalty relief program under Revenue Procedure 2015-32**. The Department of Labor’s Delinquent Filer Voluntary Compliance Program (DFVCP) does not apply to these Form 5500-EZ filings. Here’s how it works: - Prepare a complete **paper Form 5500-EZ for each delinquent year**, including any required attachments. - Check **Box D in Part I** for IRS late-filer penalty relief. Follow the IRS instructions for older forms without Box D. - Attach **Form 14704** and include a check payable to **United States Treasury**. - Pay **$500 per delinquent return, capped at $1,500 per submission for the same plan**. - Mail the packet to the IRS using the address in the current Form 5500-EZ instructions. **Electronic filings through EFAST2 do not qualify for this relief.** **The key caveat:** Once the IRS issues a **CP 283 penalty notice** for a particular return, that return is no longer eligible for this program. Reasonable-cause relief may still be available depending on the circumstances. See the [IRS’s Form 5500-EZ penalty relief guidance](https://www.irs.gov/retirement-plans/penalty-relief-program-for-form-5500-ez-late-filers) for eligibility and submission requirements.   ### Why So Many People Miss This Here are the most common scenarios that trigger unexpected 5500-EZ filings: #### 1. The Backdoor Roth Setup High-income taxpayers who can't contribute directly to a Roth IRA often use the “backdoor Roth” strategy. A common first step is rolling Traditional IRA balances into a Solo 401(k) to avoid the pro-rata rule. That single rollover can spike the plan balance above $250,000 overnight, creating a filing requirement most people don't know about. #### 2. Years of Contributions and Growth Even without a rollover, steady contributions and market growth compound quickly. Someone maxing out contributions can easily pass $250,000 after a handful of years. #### 3. Plan Termination When a Solo 401(k) is shut down, perhaps after selling a business or retiring, a final 5500-EZ must be filed regardless of balance. Many people forget this step during the wind-down process. ### The Filing Process: Who Does What The plan administrator is responsible for making sure Form 5500-EZ is completed and filed. An advisor or accountant can help prepare it. **For regular filings:** Form 5500-EZ can be submitted electronically through EFAST2 or on paper with the IRS when permitted. For plan years beginning on or after January 1st, 2024, filers required to file at least 10 IRS returns of any type during the relevant calendar year generally must file electronically. **For IRS late-filer penalty relief:** Mail paper Forms 5500-EZ with Form 14704 and the required fee. Electronic submissions through EFAST2 do not qualify for this program. Keep copies of the completed forms and proof of submission with your plan records.   ### What Information You'll Need To prepare a 5500-EZ, gather: - Plan name and number (first plan is usually 001) - Employer EIN (not SSN) - Plan year start and end dates (usually January 1 – December 31) - Beginning-of-year and end-of-year assets - Contributions made during the year (employee + employer) - Distributions, if any - Plan codes identifying plan features (e.g., profit-sharing, Roth, rollovers) Your adoption agreement and custodian statements usually provide everything you need. ### A Real-World Example Take a self-employed consultant who rolled $200,000 from an old Traditional IRA into her Solo 401(k) in February. By year-end, the plan had grown to $275,000. - December 31 balance: $275,000 → triggers filing. - First Form 5500-EZ due: July 31 of the following year. - If ignored, penalties accrue at $250/day, capped at $150,000. - If eligible for the IRS late-filer penalty relief program: a $500 fee for this one delinquent return, submitted on paper with Form 14704 before the IRS issues a CP 283 notice. The difference between ignoring the rule and fixing it proactively can literally be the cost of a new house. ### Why Custodians Don't Save You Here One of the most dangerous misconceptions is assuming your custodian — Fidelity, Vanguard, Schwab, Altruist, etc. — handles this for you. They don't! They report contributions and balances on 5498s and 1099-Rs. But they are not responsible for Form 5500-EZ. That responsibility rests squarely on the plan sponsor, the business owner. If you don't know about it, nobody is going to tap you on the shoulder. ### Planning Implications For advisors and high-income individuals using Solo 401(k)s strategically, this filing has ripple effects: - **Backdoor Roth readiness:** Rolling IRAs into a Solo 401(k) clears the pro-rata rule, but may create a filing obligation. Don't trigger one strategy while ignoring the compliance that comes with it. - **Estate and exit planning:** If the business is sold or the plan terminated, don't forget the final 5500-EZ. Skipping this step can create a headache years later when the IRS asks why the plan never closed properly. - **Audit protection:** Keeping clean filings on record avoids unnecessary questions in an IRS audit. ### The Bottom Line The Solo 401(k) is one of the best tools for the self-employed to build wealth and reduce taxes. But once assets cross $250,000, Form 5500-EZ is not optional. **Key takeaways:** - Check your plan balance at year-end. - If over $250,000, file Form 5500-EZ by July 31. - File a final 5500-EZ when terminating a plan, regardless of size. - If late, act promptly: eligible filers can use the IRS penalty relief program for $500 per delinquent return, capped at $1,500 per submission for the same plan. - Don't assume your custodian will do this for you; the responsibility is yours. A missed 5500-EZ is a paper cut that can turn into a financial amputation if ignored. With awareness and a little proactive planning, it's an easy win. Solo 401(k) & Form 5500-EZ: Frequently Asked Questions - What is Form 5500-EZ and who must file it? It's an annual return for one-participant plans (Solo 401(k)s covering only the owner and possibly a spouse). You must file if plan assets exceed $250,000 at year-end, or if the plan terminates, regardless of size. - When is the Form 5500-EZ due? For calendar-year plans, the filing is due July 31. You can extend to October 15 by filing Form 5558 by July 31. - What are the penalties for filing late? Statutory penalties are $250 per day, up to $150,000 per return. Eligible Solo 401(k) plans can use the IRS penalty relief program under Revenue Procedure 2015-32 for $500 per delinquent return, capped at $1,500 per submission for the same plan. This requires paper filings with Form 14704 before the IRS issues a CP 283 notice for the return. DFVCP does not apply. - How do I file — does my custodian do it? The plan administrator is responsible for filing. Regular returns can be filed through EFAST2 or on paper when permitted by IRS rules. Requests under the IRS late-filer penalty relief program require paper Forms 5500-EZ, Form 14704, and the required fee. Custodians like Fidelity, Schwab, or Vanguard do not file Form 5500-EZ for you. - What information do I need to complete the form? Plan name/number, employer EIN, plan year dates, beginning/ending assets, contributions, distributions, and plan feature codes. Your adoption agreement and custodian statements usually contain this data. - What situations commonly trigger the filing requirement? A large IRA rollover into the Solo 401(k), several years of contributions and growth pushing assets over $250,000, or plan termination (which requires a final filing regardless of balance). ### 🔎 Need a Solo 401(k) Compliance Check (Before It Costs You)? **VIP Wealth Advisors** helps self-employed professionals avoid 5500-EZ pitfalls, coordinate backdoor Roth strategies, and keep your retirement plan clean and tax-smart. 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[↑](https://vipwealthadvisors.com/insights/solo-401k-form-5500ez-mistake#top) [![Financial Planning Association](https://vipwealthadvisors.com/hs-fs/hubfs/FPA-logo.png?width=189&height=100&name=FPA-logo.png "Financial Planning Association")](https://vipwealthadvisors.com/professional-affiliations) [![XY Planning Network](https://vipwealthadvisors.com/hs-fs/hubfs/XY_Planning_Network.png?width=189&height=100&name=XY_Planning_Network.png "XY Planning Network")](https://vipwealthadvisors.com/professional-affiliations) [![NAPFA National Association of Personal Financial Advisors](https://vipwealthadvisors.com/hs-fs/hubfs/NAPFA.png?width=189&height=100&name=NAPFA.png "NAPFA National Association of Personal Financial Advisors")](https://vipwealthadvisors.com/professional-affiliations) [![Fee Only Network Member](https://vipwealthadvisors.com/hs-fs/hubfs/Fee-Only-Network-3.png?width=189&height=100&name=Fee-Only-Network-3.png "Fee Only Network Member")](https://vipwealthadvisors.com/professional-affiliations) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "Mark Stancato, CFP®, EA, ECA, CRPS®", "sameAs" : [ "https://www.tiktok.com/@marktheprivatecfo", "https://www.youtube.com/@MarkThePrivateCFO", "https://www.instagram.com/marktheprivatecfo/", "https://www.linkedin.com/in/markstancato/", "https://www.facebook.com/marktheprivatecfo/" ], "url" : "https://vipwealthadvisors.com" }, "dateModified" : "2025-09-09T08:00:00-05:00", "datePublished" : "2025-09-09T08:00:00-05:00", "description" : "Did you know a Solo 401(k) over $250,000 triggers a Form 5500-EZ filing requirement? 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Here’s what you need to know.", "embedUrl" : "https://www.youtube.com/embed/HBQL8hg9568", "name" : "Solo 401(k) Form 5500-EZ | $150,000 Penalty Explained", "thumbnailUrl" : "https://img.youtube.com/vi/HBQL8hg9568/maxresdefault.jpg", "uploadDate" : "2025-09-09T08:00:00-05:00" } } ``` ```json { "@context" : "https://schema.org", "@type" : "FAQPage", "mainEntity" : [ { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "Form 5500-EZ is an annual return for one-participant plans like Solo 401(k)s. It reports plan assets, contributions, and distributions to the IRS and Department of Labor." }, "name" : "What is Form 5500-EZ for a Solo 401(k)?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "Solo 401(k) owners must file Form 5500-EZ if plan assets exceed $250,000 at year-end or if the plan terminates, regardless of balance. The due date is July 31, with an extension to October 15 available via Form 5558." }, "name" : "When must Solo 401(k) owners file Form 5500-EZ?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "The IRS can assess penalties of $250 per day, up to $150,000 per missed filing. However, if you act before receiving a notice, the DFVCP program can reduce penalties to $500 per return, capped at $1,500 per plan." }, "name" : "What are the penalties for not filing Form 5500-EZ?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "No. Custodians do not file Form 5500-EZ. The plan administrator — usually the business owner — is responsible for filing through the Department of Labor’s EFAST2 system." }, "name" : "Do custodians like Fidelity or Vanguard file Form 5500-EZ for me?" }, { "@type" : "Question", "acceptedAnswer" : { "@type" : "Answer", "text" : "You’ll need plan name and number, employer EIN, plan year dates, beginning and ending assets, contributions, distributions, and plan feature codes. This information is available from your adoption agreement and custodian statements." }, "name" : "What information is needed to file Form 5500-EZ?" } ] } ```