Just happened to me. You are given 30 days notice to decide whether to take the package or not. If you don't take it, they will not tell you when you will be displaced. In my case, it was 2 1/2 months later before my displacement. (this was actually really stressful as you have no idea when the axe will come down.) You then get 60 days working/non-working. (this depends on your situation) And then severance begins. During the 60 days, you have all of your benefits, including 401K contribution. When severence begins, you can no longer contribute to your 401K, but you get everything else. And, your benefits will end at the end of your last month. For example, if your severence ends on Jan. 2nd, your benifits continue through January 31st.