3753 / What special qualification requirements apply to 401(k) plans?
To qualify, a 401(k) plan (or a plan that provides a 401(k) cash or deferred arrangement) generally must first be a qualified profit sharing or stock bonus plan.1
Contributions to the plan made under a cash or deferred arrangement must satisfy the nondiscrimination in amount requirement ( Q 3802), be subject to withdrawal restrictions ( Q 3802), and will not be included in the employee’s gross income unless the employee elects to treat the contributions as designated Roth contributions ( Q 3779).