Which of the following statements is true regarding 401(k) plans?

The statement that employers may also add a profit-sharing feature is true regarding 401(k) plans. This means that, in addition to employees making their own contributions to the retirement plan, employers have the option to contribute additional funds based on the company’s profits. This feature can enhance the overall savings of employees and provide them with an extra incentive to stay with the company, as profit-sharing can encourage loyalty and retention.

The other statements are inaccurate. For instance, participants are not required to contribute a specific percentage of their salary, making the second statement incorrect. Additionally, 401(k) plans are not exclusive to government employees; they are available to employees of private-sector businesses as well, which makes the third statement false. Lastly, the fourth statement about 401(k) plans not allowing salary deferral contributions is incorrect, as salary deferral is a fundamental aspect of how these plans function, allowing employees to set aside a portion of their paycheck before taxes are calculated.