How much does a geothermal system cost?

It depends on the size of the system, the loops that are installed, new or existing home etc. There are a lot of variables however I will say that the majority of installs range from $20,000 to $25,000 prior to tax credits and utility rebates. Let’s say a 5-ton geothermal on Alliant electricity costs $20,000. Our system will qualify for a $6,000 tax credit (30% of the total install cost) and an Alliant rebate of $4,335.00. That gives you a new out of pocket of $9,665! That is less than 50% of the total cost!