Household bills

Best way is to get the frugal trait for all sims in the household, it's brought with aspiration points and the effect stacks so the more sims that have it the lower the bills will be also If you have the Eco Lifestyle expansion wind turbines, solar panels and dew collectors help and the lot traits Geothermal and Natural Well helps with bills too. Upgrading appliances so they use less water and power is another way to lower bills 🙂