Geothermal ROI Calculator: Use Your Quotes and Energy Model

This calculator uses your complete bids and a project-specific annual-energy estimate. It reports simple payback and cumulative nominal savings; it does not predict future utility rates, resale value, tax outcomes, or equipment life.

Complete geothermal proposal ($) Complete conventional replacement proposal ($) Written approved incentives ($) Current annual heating and cooling cost ($) Projected annual geothermal energy cost from a documented model ($) Annual geothermal service-cost estimate ($) Annual conventional service-cost estimate ($) Analysis period (years)

Inputs that need evidence

Complete competing proposals based on the same comfort and building scope.
A project-specific energy model using actual fuel use, utility rates, loads, and selected equipment.
Written incentive approvals.
Service assumptions taken from the actual proposals or service plans.
A sensitivity check with lower savings and higher costs.

View the official sources reviewed for this page. Program terms, product catalogs, permits, and tax rules can change.

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