Would anyone be so kind to please explain what is Employee ID and where can I get this information online on my own? The term "on my own" means that I want to find this myself without asking/calling/emailing employer. I thought Employee ID is EIN but it seems like this is not true. The EIN looks like "12-3456789" but what I see on PayStub the "Employee ID", whatever this is, could be fewer digits, sometimes four digits, sometimes five, something just three etc. So what is Employee ID and where can I get this for particular employer on my own? I don't have any records of past taxes so impossible to check historically - I need direct info where to get this. Thank you!