One of the biggest decisions many of our clients face is what to do with their 401k plan when they leave their employer. There is no clear cut answer as to whether you should roll over your 401k plan to an IRA, another employer’s 401k plan, or simply to leave it where it is, because it involves several different factors, including long term investment costs and the availability of investment options within the plans. Both can impact the long term performance of your retirement plan. However, the most critical factor that can have a big impact, both short and long term, are the tax implications of a rollover. Understanding these implications is essential before making any decision regarding your 401k plan.