Savings by improving P.F. -- How

Hi Friends,

Can we save energy cost and measure it by improving power factor?

I know if my billing is in KVAH and not in KWH, I have to pay as per my power factor condition i.e. More KVAH units at low P.F. and vice versa.

What if my average P.F. is 0.85 and I want to improve it to 0.95. I am being charged on KWH. How to calculate the savings ... 😕