Depends where you live, what appliances you have in your house, and how much you use them. I pay about $150 for electricity per month. Another $120 for water and sewer which is lumped together in one bill. This is in Hawaii where there is no heating or cooling for a two person household with a washer, dryer, water heater, one bathroom. You will either have gas or electric hot water, and you will either have gas or electric stove. Usually you either have gas or electricity, not both. We have very old inefficient appliances, so if your place has newer more efficient ones, particularly your hot water heater and HVAC systems, you’d likely save a lot of energy and money. The utility companies will likely give you the rates if you call and ask. You can approximate what your monthly usage rates will be and come out with an approximation for monthly cost.