If you get fired, can the company hold your retirement if you are 100 per cent invested?

I would have to read the retirement plan to answer this question. This could be legal, but I do not know.

The terms of the plan would have to be reviewed but this does sound odd.

This is a very common scenario. Most retirement money is covered by a written retirement plan, which is usually a huge document with dozens, if not hundreds, of pages. No doubt, within that document, it says they pay once a year. By law, you have a right to see the actual retirement plan, and they must produce it within 30 days of your written request, otherwise there's a penalty of $100/day for being late