A 401(k) plan is considered top heavy when the account balances of “key employees” exceed 60% of total plan assets. This ratio is tested every year based on account balances as the last day of the prior plan year (the "determination date"). For example, the determination date for 2024 calendar-based plan year is December 31, 2023.
Here's what you need to know about the top heavy test.
A Key Employee is defined as any employee (including former or deceased employees), who at any time during the year was:
Safe harbor 401(k) plans automatically pass the top heavy test UNLESS one or more of the following conditions apply:
When a 401(k) plan is top heavy, non-Key Employees must generally receive an employer contribution equal to 3% of their annual compensation.
Any employer contribution can be used to offset this top heavy minimum contribution requirement.
Safe harbor 401(k) plans are the most popular form of small business 401(k) plan in large part due to the top heavy test. Many - if not most - small plans cannot pass the test, while a safe harbor contribution will cost about the same as a top heavy minimum contribution.
Not sure your 401(k) plan's top heavy status? Ask your 401(k) provider. Finding out your plan is top heavy down the line is never a welcome surprise.