Is my first 90 days considered "at-will" employment?

During the 90 day introductory probation period is the employment considered "at will" if the policy states during that period "immediate termination" in the companies favor. Is it vice versa to the employee.

What you are under is what a lot of employers are doing now. Giving a test run. They can let you go for absulutely no reason during your first 90 days. I have working in state employement where the probation period is 1 year. You are basically at will at this point. If they do have a probationary employment policy than they have to have a progressive disciplinary policy which would preclude them from just firing you for no reason after your probabtion ends. That would defeat the whole purpose of a probation period if an employer could just fire you at will after the probation ends. The state that I work in has very strict rules such as grievance rights for employees after the complete their probation period and get fired. There must be just cause.

Your first 90 days on the job are considered "probationary" or "introductory". It's basically like the company is taking you out for a test drive (paid of course). Usually, during these 90 days, you don't get any sort of benefits (health, paid leave, sick days, etc). Also during the first 90 days, the company can let you go at a moments notice and they do not have to provide you with a reason.

AFTER the 90 days are up and they want to let you go, they usually have to provide you with a good reason as why they are letting you go (you're late to work often, you don't do what you're asked to, etc). A company cannot just say "get out" and that's that. If a company were to do that, you could probably file a "wrongful dismissal" lawsuit against the company. Of course, all of this depends on the state your in, but generally this is how everything goes in most states.

As for if you can leave at a moment's notice, well it depends on the state you live in. I live in Florida and if I wanted to to, I could call up my job right now and say "I quit!" and that's that. In other states, however, you may be required to give two weeks notice. If you're not required to give two weeks notice however, it is common courtesy to do so anyway or to at least offer to stay on the job until they can find a replacement for you (unless you have a monster boss haha). =o)

everyday is at will employment. It never changes
An employer can let you go at any time for no reason

and yes, you can quit at anytime you want for any reason