Geothermal Cost Calculator: Compare Complete Quotes

Use this tool after receiving a complete geothermal proposal and a complete conventional replacement proposal. It calculates the project premium and homeowner balance without inventing local drilling costs or system size.

Complete geothermal proposal ($) Complete conventional replacement ($) Written, approved rebates or discounts ($) Other confirmed project support ($)

Make the proposals comparable

Same building loads and comfort target.
Indoor equipment, loop field, drilling or excavation, distribution, electrical work, permits, restoration, and commissioning.
Written incentive approval rather than an advertised maximum.
Financing shown separately by APR, fees, term, and total repayment.
Explicit exclusions and changed-condition pricing.

The former 30% federal residential credit must not be entered for a new system installed in 2026.

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

Want quotes from 3 installers in your state or province?

We'll review your request and forward it to up to 3 listed installers in your state or province who can confirm pricing. Free, no obligation.

I agree to share my contact information with up to 3 listed installers in my selected state or province after Geothermal Finder reviews my request. See Terms of Service and Privacy Policy.

We never sell your info. Only installers in your state or province see your request.

Request received ✓

Thanks — we'll review your request and forward it to listed installers in your state or province. You'll hear from them directly within 1–2 business days.