My power company has a cool feature that lets me see what my usage has been. Prior to the tub with similar weather and habits, we were averaging about 15 KW/day. Once the tub was up to temp (heated it twice, once to run disinfection cycle on used tub with jet away and bleach and once to get it up to temp) we are averaging about 28 KW/day. It has been rather chilly lately so I expect it to get cheaper in the summer. But we'll certainly be looking at higher prices come winter.
Information:
The tub is a 2013 Sundance Cameo 880 series. They indicated it should cost about $18/month or about $0.60/day to run with an average temp of 60 (as I recall). Average temp for us has been about 55 according to the information below. We're a little over 2.5 times the estimate (at $0.12/KW in PA) but no surprise there as it's manufacturer sales information and nothing more. Without factoring in 4/29 and 4/30, our costs are $1.56/day (13 KW x $.12) for electricity. We keep the tub at 101 but I've taken it up to 104 and had it down at 98 degrees in trying to figure out where we want it. We've settled on 101 as I like it hot and my wife likes it cooler.
I keep my KW hour cost lost by jumping from temporary contract to temporary contract with different providers. Otherwise, it would be about $0.02 higher per KW. We went from AEP to Con Edison at some point in the following data information but that does not affect the readings.
There has been a slight increase in laundry as well at about one extra load a week. This is still a cost to run the tub from my perspective. Everything else is even in terms of our habits.
Here are some charts that give the gist of our usage. This should be helpful to those on the fence about a tub.
Pre and Post Hot Tub UsagePre hot tub average usage:
Post Hot Tub UsageDaily Usage without 4/29 and 4/30 outliers