Competitive Supplier Calculator
This three part tool can show you how your NSTAR bill will differ if you choose to sign an agreement with a Competitive Power Supplier. It will also show how your past electric use may be recalculated on your NSTAR bill.
Please note, NSTAR's Basic Service rates are currently only available through December 31, 2013. Your contract with a Supplier might be longer in duration. New Basic Service rates, which take affect January 1, will be made available in late December.
To use this calculator, please have your latest NSTAR bill and a copy of a Competitive Power Supplier's offer handy.