As much as you can get! I've seen people (usually in sales) get bonuses almost equal to their base salaries, or even more. In my experience, vague terms like "taken care of" usually result in pretty weak bonuses, but who knows, maybe your employer is different. Without a defined bonus structure in place, $100 would be more than you initially bargained for. Even with defined structures, I have been screwed more times than I would like to admit on various interpretations/technicalities. As one member puts it, you don't get what you deserve, you get what you negotiate. I wish the work effort alone was enough, but I have always had better luck hinting that I could make more money somewhere else than focusing on my hard work. Do some research ahead of time and see what comparable positions at other companies offer. Whatever your employer offers, even if it is great, ask for more (very politely) citing some of your research and state that you are only asking for what is fair and market, as long as you are courteous and don't come off as a dick, the worse that can happen is they say no. As soon you appear satisfied, you will "lock in" your price and it will be much more difficult to move the needle. Good luck!