Form 5500: The Employer's Annual Employee Benefit Plan Report

Who Must File Form 5500?

Employers sponsoring ERISA-covered benefit plans with 100 or more participants at the beginning of the plan year must file Form 5500. Plans with fewer than 100 participants may use Form 5500-SF, a simplified short form with reduced reporting requirements. One-participant plans, including solo 401(k)s where the only participant is the business owner and their spouse, use Form 5500-EZ, which has its own separate filing rules and is not submitted through the DOL's electronic system.

What Does Form 5500 Report?

Form 5500 captures a comprehensive picture of the plan's financial condition and operations for the year. The filing includes plan financial statements, information about plan characteristics and funding, details on service providers and their compensation, and for defined benefit plans, actuarial information. Large plans are required to attach an independent audit. The overall purpose is to give the DOL and IRS visibility into whether the plan's assets are being managed appropriately and in participants' interests.

Form 5500 Filing Deadline and Extensions

For calendar-year plans, Form 5500 is due July 31, which is the last day of the seventh month after the plan year ends. An automatic 2.5-month extension is available by filing Form 5558 before the original deadline, pushing the due date to October 15.

The late filing penalty structure is unusually steep: $250 per day the filing is late, up to $150,000 per plan year. That accumulates quickly. A filing that's 30 days late carries a $7,500 penalty. A filing that's missed entirely and caught months later can reach the maximum before the year is out. Voluntary correction programs exist but are not a substitute for timely filing.

The Form 5500 Audit Requirement

Plans with 100 or more participants are required to attach an audited financial statement prepared by an independent qualified public accountant to their Form 5500. This audit is a meaningful compliance cost, typically running several thousand dollars depending on plan complexity, and requires coordination with the auditor well in advance of the filing deadline.

The 80-120 rule provides some relief for plans near the threshold. If a plan had fewer than 121 participants at the beginning of the plan year and filed as a small plan the prior year, it may continue filing as a small plan and avoid the audit requirement. This allows plans that fluctuate near the 100-participant line to maintain small plan status rather than cycling in and out of the audit requirement year to year.

Form 5500 for Small Businesses with 401(k) Plans

For growing businesses, the Form 5500 audit requirement is a transition worth planning for before it arrives. A company that crosses 100 plan participants doesn't get a grace period. The first year the plan qualifies as a large plan, the audit is required and must be completed and attached to the filing by the deadline.

Building a relationship with an IQPA before the threshold is crossed, understanding what financial records the auditor will need, and budgeting for the audit cost in advance all make the transition significantly smoother. Business owners who discover the requirement for the first time in June of their filing year have very little runway.

How Slash Supports Businesses Managing Benefit Plan Finances

401(k) contributions and benefit plan payments flow directly through the business bank account. Employer contributions need to be deposited into the plan on a timely basis, employee deferrals must be segregated promptly after each payroll, and all of it needs to be clearly documented for the Form 5500 filing and any associated audit.

A Slash business bank account keeps those transactions organized and visible in real time, making it straightforward to verify that contributions were made on schedule and that the records support what's reported on Form 5500. Clean transaction history reduces the back-and-forth with auditors and helps ensure the financial statements attached to the filing are accurate.