5 Common Retirement Plan Errors and Tips to Fix

October 22, 2024

Mistakes happen–Here’s how to correct common 401(k) plan errors. 

Navigating the intricate rules and regulations that govern employer-sponsored retirement plans may seem overwhelming at times. Even the most diligent plan sponsors encounter retirement plan errors. In fact, it’s not unusual to discover a plan failure or error, especially after the 401(k) plan testing season is over. 



The costly impact of retirement plan errors


Plan sponsor compliance errors can be costly. The Employee Benefits Security Administration (EBSA) restored over $1.4 billion

to employee benefit plans, participants, and beneficiaries in FY 2023.[1] A majority of the investigations resulted from self-reported administrative errors and oversights made by unknowing plan sponsors. It can be stressful to discover retirement plan errors or failures. The good news is that plan sponsors can fix many mistakes themselves, often without fines or penalties. 

This guide includes some of the most common retirement plan errors, their remedies, and valuable resources to help 401(k) plan sponsors manage their responsibilities effectively.


 

Avoid and address costly mistakes


Plan sponsor responsibilities include ensuring the retirement plan complies with regulatory requirements related to the plan’s design and administration. Noncompliance can lead to personal liability, tax penalties, or even disqualification, which means that the plan could lose its tax-deferred status.


Most retirement plan errors are caused by operational or administrative oversight. Fortunately, the IRS and Department of Labor (DOL), the agencies that govern employer-sponsored retirement plans, offer several ways for plan sponsors to self-correct retirement plan errors. A good place to start is the IRS’ 401(k) Plan Fix-It Guide that provides tips on finding, fixing, and avoiding the 12 common mistakes.



Five common 401(k) errors and remedies

Below are five common plan sponsor compliance errors and remedies covered in the guide:


Error: Not updating the plan every few years to reflect changes in the law.

Remedy: Adopt plan amendments for missed law changes. Plan sponsors who miss plan amendment adoption deadlines can use the IRS correction program.


Error: Failing to operate the plan according to the plan document.

Remedy: Apply a correction that puts affected participants in the same position they would have been had the operational oversight not occurred.


Error: Not using the plan’s definition of compensation correctly for all deferrals and allocations.

Remedy: Make corrective contributions, reallocations, or distributions.


Error: 401(k) plan testing failures (ADP and ACP nondiscrimination tests).

Remedy: Make qualified nonelective contributions for non-highly compensated employees.


Error: Employer matching contributions weren’t made to all appropriate employees.

Remedy: Apply a correction that puts employees in the same position they would have been in if matching contributions had been made to all eligible employees according to the plan’s terms


This handy 401(k) plan checklist from the IRS can help remind plan sponsors of their fiduciary responsibilities and keep their plan in compliance. Keep in mind that this list should only serve as a guide—it isn’t a substitute for a complete plan review.



How to correct retirement plan errors

Plan sponsors can fix retirement plan errors using the IRS Employer Plans Compliance Resolution System (EPCRS). There are three ways to fix mistakes under EPCRS:


Self-Correction Program (SCP)

Plan sponsors can correct certain plan mistakes without notifying the IRS or paying fees.


Voluntary Correction Program (VCP)

Any time before an audit, a plan sponsor may pay a fee and secure IRS approval to fix retirement plan errors.


Audit Closing Agreement Program (Audit CAP)

Plan sponsors can pay a fine and correct mistakes during a plan audit.



New rules under SECURE 2.0

SECURE 2.0 introduced some new rules pertaining to retirement plan errors associated with overpayments to participants or beneficiaries. The law also contains enhancements to the retirement plan error self-correction program under the IRS’s Employee Plans Compliance Resolution System (EPCRS). These provisions went into effect when the law was passed in December of 2022.



Prompt resolution and assistance 

Addressing plan errors promptly is critical to fulfilling plan sponsor responsibilities and ensuring that participants’ retirement savings stay on track. By following best practices and taking advantage of available retirement plan error resolution resources, plan sponsors can navigate their operational and administrative responsibilities, avoid costly plan compliance errors, and help improve retirement security for participants.


Review your 401(k) plan regularly to spot errors and avoid costly remedies. We can help you identify and fix retirement plan mistakes while implementing strategies that aim to avoid them in the future.


[1]https://www.dol.gov/agencies/ebsa/about-ebsa/our-activities/resource-center/fact-sheets/ebsa-monetary-results

September 15, 2026
The Challenge Sometimes the most expensive retirement plan mistakes aren't dramatic. They're quiet. A former client of ours changed retirement plan providers following an acquisition several years prior. On the surface, everything appeared to be operating normally after moving to the new provider: employees continued making contributions to the plan, the plan’s investments remained in place, and the business continued its normal operations. Then another merger opportunity came along. As part of their due diligence process, the buyers reviewed the retirement plan. What they found immediately raised concerns. The annual Form 5500 filings required by ERISA law had not been submitted for several years. That also meant that none of the required compliance testing had been completed, and routine administrative responsibilities had also gone undone. What had started as a routine review quickly became a significant obstacle to completing the business sale. The Hidden Risk Many employers assume that once a retirement plan provider is hired, responsibility for the plan’s ongoing administration has effectively been transferred to that provider. But a plan sponsor is never completely relieved of its responsibility to oversee the plan. Even when outside providers are hired to handle filings, testing, recordkeeping, or other administrative functions, the employer still needs to make sure those responsibilities are being fulfilled. At the same time, there is an important difference between a provider that simply waits for the employer to supply information and one that actively works with the employer to make sure the plan stays on track. In this case, some of the missing work may have resulted from information requested by the provider that was never supplied by the employer. Technically, the employer still had a responsibility to provide that information and ensure the work was completed. But years of required administration should not quietly disappear into a communication gap. A proactive administrator follows up. If the usual contact isn’t responding, they escalate the issue. They make sure the appropriate people understand what is outstanding, why it matters, and what could happen if it isn’t addressed. Retirement plans require ongoing attention every year, including government filings, compliance testing, participant administration, documentation, and, when necessary, operational corrections. When those responsibilities are neglected, the consequences may not become obvious immediately. Instead, problems can accumulate quietly in the background until an IRS inquiry, Department of Labor investigation, audit, or—as in this case—a business transaction suddenly exposes years of unresolved issues. The prospective buyer made it clear that the retirement plan issues needed to be addressed before the transaction could move forward. The Rescue Knowing we had previously administered their plan, the current company leadership contacted us. Our first step was to determine the full scope of the problem. The timing made the situation particularly challenging. This wasn’t simply a retirement plan cleanup project. A business transaction was underway, and the company needed answers quickly. We assembled a team to determine the full scope of the problem and begin developing a path forward. Because we have deep experience with taking over neglected plans, we were able to separate perceived problems from actual compliance issues and reconstruct the plan's history. In reviewing the prior documentation, we identified exactly which administrative functions had been completed and which had been missed. We gathered historical payroll and participant data and developed a comprehensive correction strategy. Having access to historical plan records was especially important. Retirement plan problems may not surface until years after the underlying event, making good record retention critical. If you’re curious about how long to hold onto plan documentation, please see our blog post here . The final correction effort proved to be far more manageable than originally feared. Instead of allowing uncertainty around the retirement plan to continue hanging over the transaction, the employer now understood what had actually gone wrong, what needed to be corrected, and what steps were required to move forward. The Outcome With the correction efforts clarified and a clear roadmap in place, the employer was able to begin correcting the plan and continue moving toward its business transaction. More importantly, the company avoided entering the acquisition process with unresolved retirement plan liabilities hanging over or ruining the deal. The experience also reinforced an important lesson: Changing retirement plan providers doesn't eliminate administrative responsibilities. But it also demonstrated why the quality of the administrator matters. A good retirement plan administrator doesn’t simply process the information that arrives. They help make sure the information arrives in the first place. The Lesson: Oversight Is a Shared Process Employers ultimately have a responsibility to oversee their retirement plans, even when they hire professionals to handle much of the day-to-day work. That doesn’t mean the employer should have to become a retirement plan expert or personally track every filing deadline and compliance requirement. That’s one of the reasons experienced administration matters. A proactive provider should help keep the employer informed, identify missing information, follow up when something is outstanding, and escalate issues before a missed request becomes a missed filing—or several years of missed filings. The cost of failing to do so can extend well beyond an annual administration fee: Missed filings and potential penalties Incomplete compliance testing Corrective work Additional professional fees Delayed business transactions Uncertainty during mergers and acquisitions  By the time those costs appear, they can far exceed whatever might have been saved by choosing a lower-cost service model. That’s why retirement plan administration shouldn’t simply be viewed as paperwork. It should be viewed as an ongoing partnership in managing risk.
August 18, 2026
The Challenge A business owner came to us after receiving confusing news from their retirement plan actuary. Their Defined Benefit (Cash Balance) Plan had performed exceptionally well over several years; strong investment returns seemed to have created what’s called an overfunded Plan. While it seems like a positive name, an overfunded plan can create excessive and unexpected tax liabilities. So, their actuary recommended terminating the Plan by transferring the excess assets into the company's other Plan, a 401(k)/Profit Sharing Plan, before eventually closing both Plans, a lengthy and complicated process.
July 15, 2026
As we wrap up the second quarter of 2026, one trend continues to stand out: retirement plans are becoming increasingly specialized. Whether driven by changing regulations, unique workforce structures, or evolving business goals, employers are finding that a one-size-fits-all approach simply doesn't work. This quarter, we explored the unique retirement plan challenges facing several industries—including medical and dental practices, construction companies, architecture and design firms, wineries, and California employers navigating CalSavers requirements. We also continued our series on the hidden risks of low-quality retirement plan services, highlighting how operational complexity, fragmented accountability, and misaligned incentives can create costs that extend far beyond administrative fees. For employers still evaluating their retirement plan options, we also discussed opportunities that many business owners overlook, including the ability to establish retirement plans after filing a tax extension and potentially generate meaningful tax savings. Below is a recap of the articles we published this quarter. We hope they provide practical insights to help you reduce risk, improve plan performance, and make more informed retirement plan decisions.
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