4 Years Vesting 1 Yr Cliff:<p>The four years is the time period in which your stock completely vests. The one year cliff is the what you have to reach in order for the first piece of stock to vest. Therefore, if you leave the company within one year you leave with no stock because you didn&#x27;t reach the 1 year cliff. After the one year cliff, you&#x27;re stock can vest monthly, every three months or six months. It really depends on your company.