FACTOR 6: Length of Billing Period
The number of days in each "monthly" billing cycle doesn't always coincide with the calendar. You
may be billed for as few as 28 days or as many as 33. A 33-day bill will be about 18% higher than a
28-day bill. This doesn't reflect your cost of energy per unit—it just reflects the number of days
you've been billed for.