It's the day Ontarians would have been happy to wait a while longer for.

Electricity rates are going up as Friday, May 1st.

The price for peak periods - weekdays from 11 a.m. to 5 p.m. - will be 16.1 cents per kilowatt hour, compared with eight cents for off-peak hours on weekdays from 7 p.m. to 7 a.m., and all day on weekends and holidays.

The mid-peak rate of 12.2 cents per kilowatt hour will apply weekdays from 7 a.m. to 11 a.m. and from 5 p.m. to 7 p.m.

The Ontario Energy Board estimates the change to a two to one ratio between peak and off-peak rates will add $5.71 to the average monthly household electricity bill.