In a July 2010 rate comparison conducted by IMPA staff, Indiana's Public Power systems register average rates for a residential user of 1000 kilowatt-hours (kWh) per month at 9.29 percent less than the average for Indiana investor-owned utilities.

The IMPA comparison reported the average rate for Indiana's investor-owned utilities at $100.29 per month as of July 2010. The IMPA member municipal average for the same time period was $90.97, a $9.32 per month difference.

Vectren is the state's most expensive power provider, reporting an average of $132.37 per month for 1000 kWh. In contrast, IMPA members Scottsburg and Straughn have among the lowest at $76.37 and $76.52 per month respectively.