Many plan sponsors think of Form 5500 audit requirements as an annual filing obligation. In reality, the audit is one of the clearest indicators of a retirement plan’s overall compliance health.
Form 5500 audits examine many of the same operational areas regulators focus on when evaluating retirement plans, including participant eligibility, contribution timing, distributions, contribution calculations, plan documentation, and fiduciary oversight. As a result, audit findings often reveal broader compliance issues that extend far beyond annual reporting requirements.
At Caron Bletzer, we perform approximately 1,200 employee benefit plan audits annually for organizations across the country. One of the most consistent patterns we see is that compliance issues rarely begin during audit season. Instead, they develop gradually through everyday administrative processes and only become visible when the audit process brings them to light.
For plan sponsors, understanding this connection is critical. A successful Form 5500 filing starts with strong plan administration throughout the year.
What Many Plan Sponsors Get Wrong About Form 5500 Audits
One of the biggest misconceptions we encounter is the belief that an accurate Form 5500 filing automatically means a retirement plan is compliant.
Many compliance issues originate long before the filing process begins. Eligibility tracking errors, delayed contribution remittances, outdated plan amendments, and administrative inconsistencies can exist for months or even years before they are identified during an audit.
The Form 5500 audit does not create these issues. It helps uncover them.
For plan sponsors, this distinction matters because focusing solely on filing deadlines can create a false sense of security. Strong compliance depends on the day-to-day administration of the plan, not simply the accuracy of the annual filing.
Why Form 5500 Audits Matter Beyond Annual Reporting
Retirement plan audits are often viewed as a regulatory requirement. While compliance with filing obligations is important, the audit process provides significantly more value than satisfying a filing deadline.
An audit provides an independent review of plan operations and helps determine whether the plan is being administered in accordance with ERISA requirements and the terms of the governing plan document.
Just as importantly, the audit can identify operational issues that arise as plans evolve. Changes such as introducing a new compensation code, changing payroll providers, modifying internal processes, or implementing a plan amendment can unintentionally create inconsistencies between day-to-day administration and the terms of the plan document.
The audit provides an opportunity to identify and correct these issues before they develop into larger compliance concerns, helping plan sponsors maintain operational consistency and reduce the risk of costly corrections later.
The Four Areas Where Form 5500 Audits Most Often Reveal Compliance Risks
After performing thousands of employee benefit plan audits, we have found that most compliance concerns tend to fall into four core categories.
1. Contribution Processing
Auditors review whether employee deferrals and employer contributions are calculated accurately, and whether employee deferrals are deposited within the required timeframes.
Even minor delays in depositing employee deferrals, or issues with improperly included or excluded compensation when calculating contributions, can create compliance concerns. Plan sponsors can reduce risk by following a structured preparation process, such as this practical 401(k) audit checklist, and addressing potential issues before audit season begins.
While these issues are rarely intentional, they often indicate weaknesses in payroll processes or internal procedures that should be addressed before they become recurring problems.
2. Participant Eligibility
As organizations grow, acquire businesses, or implement new payroll systems, eligibility tracking becomes increasingly complex.
We frequently see situations where employees are inadvertently excluded from participation, enrolled later than required, or classified incorrectly. These errors can affect multiple participants and often require corrective action.
Many of these issues can be identified early through a proactive 401(k) plan audit process.
3. Plan Documentation
Retirement plans must operate according to their governing documents.
Auditors review whether required plan amendments have been adopted on time, whether the plan has been timely restated when required, and whether participant records are complete and accurate. They also look for inconsistencies between the plan’s day-to-day administration and the terms of the governing plan document, as these can create compliance risks that may not become apparent until an audit is performed.
4. Governance and Internal Controls
Many audit findings can ultimately be traced back to weak internal controls.
Organizations with clearly documented procedures, assigned responsibilities, and regular oversight typically experience fewer compliance issues and more efficient audit processes.
Strong governance not only supports compliance but also helps plan fiduciaries demonstrate prudent oversight.
What We See Most Often During Plan Audits
Every plan is different, but certain patterns appear consistently across organizations of all sizes.
Based on our experience auditing employee benefit plans nationwide, the issues we most commonly encounter include:
- Late employee contribution deposits
- Participant eligibility errors
- Compensation definition errors
- Missing or incomplete documentation
- Participant loan administration issues
- Internal control design issues
Importantly, these findings are rarely the result of intentional noncompliance.
More often, they stem from process breakdowns, staffing changes, technology transitions, or misunderstandings about plan requirements.
This is why proactive compliance reviews throughout the year are often more effective than relying solely on annual audit preparation.
Expert Insight
The most successful plan sponsors do not treat compliance as an annual event. They build compliance into their everyday administrative processes. When that happens, the audit becomes a validation exercise rather than a discovery exercise.
What This Means for Plan Sponsors
The most important takeaway is that compliance is not determined by a single filing.
A clean Form 5500 submission does not automatically mean a plan is compliant. Likewise, an audit finding does not necessarily indicate serious administrative failures.
Instead, audits provide visibility into how effectively a plan is being operated.
Plan sponsors that view audits as an opportunity to strengthen procedures, improve documentation, and enhance oversight often gain far more value from the process than organizations focused solely on meeting filing deadlines.
The goal should not simply be to complete the audit. Working with an experienced employee benefit plan audit firm can help organizations strengthen both compliance and governance.
Staying Audit-Ready Throughout the Year
Waiting until audit season to gather records and review processes often creates unnecessary challenges.
Organizations that remain audit-ready throughout the year are typically better positioned to manage compliance obligations and respond efficiently when audit requests arise.
Some practical steps include:
Review Plan Operations Regularly
Periodic reviews can help identify administrative issues before they develop into larger compliance concerns.
Maintain Organized Documentation
Plan documents, amendments, payroll records, participant files, and service provider reports should be maintained in an organized and accessible format.
Coordinate With Service Providers
Third-party administrators, payroll providers, recordkeepers, custodians, and auditors all play important roles in maintaining compliance.
Regular communication helps ensure that information remains accurate and consistent across all parties.
Monitor Key Compliance Deadlines
Keep track of required plan amendments, plan restatement deadlines, participant notices, and annual reporting obligations. Staying current with these requirements helps reduce compliance risks and supports the ongoing administration of the plan in accordance with its governing documents.
Why the Audit Process Strengthens Plan Governance
The most successful plan sponsors do not view audits as a burden. They view them as a governance tool.
A quality audit provides:
- Independent, objective review of plan operations
- Greater confidence in financial reporting
- Improved visibility into plan operations
- Early identification of potential risks
- Opportunities to strengthen administrative processes
When viewed through this lens, Form 5500 audit requirements become an important part of an organization’s overall compliance strategy rather than simply another regulatory obligation.
Final Thoughts
Form 5500 audit requirements are about much more than completing an annual filing. They provide a structured review of the operational, financial, and administrative processes that support retirement plan compliance.
Because audits examine many of the same areas regulators focus on, they can serve as an early warning system for compliance concerns and an opportunity to strengthen plan governance before issues escalate.
Our experience has shown that the organizations with the smoothest audits are not necessarily those that spend the most time preparing immediately before filing season. They are the organizations that prioritize strong administration, clear documentation, and consistent oversight throughout the year.
For plan sponsors, the message is simple: compliance is not an annual event. It is an ongoing process. When audits are viewed as part of that process rather than a standalone requirement, they become one of the most valuable tools available for managing risk and fulfilling fiduciary responsibilities.
Related Resources
- 401(k) Plan Audits
- Employee Benefit Plan Audit Services
- Practical 401(k) Audit Checklist
- About Caron Bletzer
- Request a Proposal
Frequently Asked Questions
Generally, employee benefit plans with 100 or more participants with account balances at the beginning of the year must obtain an independent audit and include the auditor’s report with their annual Form 5500 filing.
The audit reviews financial reporting and operational processes that directly affect compliance, including contributions, eligibility, distributions, plan documentation, and internal controls.
Yes. The audit process can identify operational and compliance issues that may otherwise go undetected. By identifying these issues early, plan sponsors have an opportunity to correct them before a potential IRS or Department of Labor examination. In many cases, timely correction may reduce or eliminate potential sanctions and help demonstrate a proactive commitment to plan compliance.
Common issues include late employee contribution deposits, participant eligibility errors, errors in applying the plan’s definition of compensation, participant loan administration concerns, and incomplete documentation.
Maintaining organized records, reviewing procedures regularly, strengthening internal controls, and coordinating with service providers throughout the year can significantly improve both audit readiness and overall compliance. Plan sponsors may also benefit from reviewing this practical 401(k) audit checklist before the start of audit season.
