Don't panic. If your PTO operates using the school's EIN, with the school's blessing, then your group is an extension of the school rather than an independent organization. That's ok as long as everybody's in agreement with the implications. It's like setting up a separate bank account for the Student Council using the school's EIN. Many PTO's do this, many more have their own EIN and are not (yet) 501c3, and others have their own 501c3. A public school is automatically a 501c3 organization, so any approved committee operating with the school's EIN is also part of that 501c3 .
That said, here are the implications...since you use the school's EIN, all the money you raise belongs to the school. It is out of courtesy and tradition that the school/principal lets the PTO manage "their" money. However, in the eyes of the IRS, the organization who owns the EIN owns the money. If the school decided it wanted to commandeer your account, there really wouldn't be anything you could do about it since you are not a separate legal entity. That's a risk you may be willing to live with.
By using the school's EIN, however, you can honestly tell a donor that their donation is tax-deductible since the shcool is a 501c3, and your group is a committee of the school. There are lots of PTOs who have their own EIN, but haven't filed for 501c3, who are under the mistaken impression that donations received are tax-deductible. Not until you get that 501c3.
It sounds like the principal and superintendant haven't ever given this much thought. That suggests there haven't been any issues in the past that brought scrutiny to the arrangement, so things must be fine. However, personnel changes over time, and eventually your school may get a principal or superintendant who is not so accomodating. You might be faced with the money being taken to cover a budget shortfall, or the PTO being asked to separate legally from the school. This may not be imminent, but you might want to do a little research on 501c3 application, just so you can thoughtfully consider if it's time for your group to apply.
Hope this helps.
[ 12-09-2005, 11:36 AM: Message edited by: Critter ]