How have your bills been since seasons?

I would say that my bills definitely increased. I've been playing all over my game to get different families to experience the holidays. For one family, the bills were $14,000!! I only have the thermostat in one house in Newcrest. I'm guessing that house has very poor insulation because the sims are freezing in the winter and burning up during the summer. No other families have had that type of experience.