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

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.
July 15, 2026
When considering retirement plans, employers in the private sector are often focused on designing a compliant plan that meets the needs of their owners and employees. While that process for private sector entities can certainly be complex, nonprofit organizations face an entirely different set of considerations, related to funding, staffing, governance, and organizational structure, to name just a few. From seasonal employees and grant-funded positions, to creative executive retention strategies and legacy retirement programs, to smaller budgets serving a mission, there is so much behind the scenes that can affect a nonprofit organization’s ideal retirement plan. At Primark Benefits, we've worked with nonprofit organizations of all sizes throughout our history, from large institutions with hundreds of participants to small community organizations with fewer than 20 employees. In addition, many members of our management team serve on nonprofit boards across the country for organizations and causes near and dear to their hearts. All that combined experience has validated what makes a retirement plan most successful: understanding the organization itself. 
July 2, 2026
The Mega Backdoor Roth strategy has become one of the most talked-about retirement planning techniques in recent years. Financial publications regularly highlight its potential to help participants contribute far more than the standard deferral limits allow. However, while the strategy can be extremely valuable, an important limitation is often overlooked: due to nondiscrimination testing requirements, some employer-sponsored retirement plans may prevent certain participants from taking full advantage of it. Before assuming a Mega Backdoor Roth will work in your plan, it is important to understand how the strategy operates—and where it can run into trouble.
More Posts