In today's economic climate and the demands of the office, more employees are finding themselves with excess vacation time that they cannot even begin to use. Rather than lose the value of that unused vacation time, employees now might have a way to turn that vacation time into a contribution into their 401(k) plan. In the 1990s, the IRS issued guidance on how an employer can transfer unused vacation or sick pay to employees' 401(k) plans. In September 2009, the IRS re-addressed this subject, issuing Revenue Ruling 2009-31 and Revenue Ruling 2009-32 as part of their initiatives to provide tools to help employers and employees save for retirement.

Revenue Ruling 2009-31 deals with employers who maintain a paid time-off (PTO) program which combines vacation and sick leave pay. The revenue ruling addresses two scenarios. The first scenario addresses an employer who maintains a PTO program in which the employees forfeit any unused PTO at the end of the calendar year. In this situation, the employer may amend its 401(k) plan to allow for an employee contribution equal to the value of unused PTO at the end of the calendar year. Here then is an opportunity for the employee to contribute into the plan, without having to come up with any more cash; moreover, this contribution – as with any employee elective deferral – is not treated as current income for income tax purposes. Finally, the employer gets a corresponding deduction for the same calendar year.

The second scenario has a PTO plan which provides for a limited carryover and an automatic cash-out of unused PTO that exceeds the carryover allowance. If an employee has three weeks of PTO time and the maximum carry-over is one week, the employer cashes out the remaining two weeks to the employee. In this scenario, the employer amends its 401(k) plan to allow employees to elect to receive the PTO cash-out or to contribute the PTO cash-out to the 401(k) plan in the following