How much does geothermal cost in Massachusetts?

Geothermal (ground-source heat pump) installation in Massachusetts typically costs $30,000–$60,000 depending on loop type and home size. Horizontal loops are cheapest but need open land; vertical-bore loops are standard in dense MA neighborhoods.

Is the 30% federal geothermal tax credit still available?

No. The federal Section 25D Residential Clean Energy Credit — the 30% geothermal credit — expired December 31, 2025 under the One Big Beautiful Bill Act. Property placed in service after that date does not qualify.

How long does a geothermal system last?

The indoor heat pump unit typically lasts 20–25 years; the ground loop itself can last 50+ years. That longevity helps offset the higher upfront cost, especially when paired with current Mass Save geothermal incentives.

Do I need a lot of land for geothermal?

Not necessarily. Horizontal loops need significant open land (roughly a third to half an acre), but vertical-bore loops only need enough yard for a drilling rig and a few small wellheads — workable on most Massachusetts suburban lots.

Geothermal Heating & Cooling in Massachusetts

By MassHVAC Editorial Team Reviewed by MassHVAC Editorial Team Last updated 2026-05-27

A geothermal heat pump system serving a Massachusetts home.

What geothermal actually involves in Massachusetts

Geothermal — more precisely, ground-source heat pump systems — pulls heat from a closed water loop buried in the ground rather than from the outside air. In Massachusetts, geothermal installs typically run $30,000 to $60,000, with vertical-bore loop systems standard on smaller suburban lots and horizontal loops where land allows. Mass Save offers geothermal incentives that vary by sponsor; the federal Section 25D 30% credit expired December 31, 2025, which has materially changed the payback math.

Typical cost ranges in Massachusetts (2026)

Central air conditioning: $5,000–$12,000 installed, depending on home size and ductwork condition. Does not qualify for Mass Save heat pump rebates.
Single-zone ductless mini-split: $4,000–$9,000 installed. Qualifies for the Mass Save partial-home rebate ($1,125/ton).
Whole-home ductless heat pump (3–5 zones): $12,000–$25,000 installed. Qualifies for the whole-home rebate of up to $8,500.
Central ducted heat pump (existing ductwork): $10,000–$20,000 installed. Qualifies whole-home when sized via Manual J.
Geothermal (ground-source) heat pump: $30,000–$60,000 depending on loop type.

Cost-after-rebate is what actually hits your bank account. A $20,000 whole-home heat pump install in 2026 nets to roughly $11,500 after the $8,500 Mass Save rebate, and the HEAT Loan can finance the remainder at 0% APR for up to 7 years. Run your own scenario in the rebate calculator.

Massachusetts incentives

Geothermal & Mass Save: what qualifies in 2026

See the full Mass Save rebates hub

Verified 2026-05-27

Most homes

Whole-Home Heat Pump Rebate

$2,650 /ton

Capped at $8,500 per home

The installed heat pump must be the sole source of heating and cooling for the spaces served. Equipment must be ENERGY STAR Cold Climate certified and listed on the Mass Save Heat Pump Qualified Products List (HPQPL). A Manual J load calculation is needed to qualify for the sizing bonus and is industry-standard practice on Mass Save projects.

Partial-Home / Supplemental Heat Pump Rebate

$1,125 /ton

Capped at $8,500 per home

Heat pump installed alongside an existing primary heating system. Equipment must be on the HPQPL. Lower per-ton rebate reflects supplemental rather than sole-source use.

Basic Heat Pump Rebate

$250 /ton

Capped at $2,500 per home

New for 2026. Applies to replacing an existing heat pump with a new qualified HPQPL-listed heat pump, or conditioning a previously unconditioned space.

$500 Right-Sized Equipment Bonus Partial-home

Partial-home installs only. Equipment must be sized to meet 90–120% of the total heating load at the outdoor design temperature, documented via an ACCA Manual J load calculation submitted with the rebate application.

$500 Weatherization Bonus Partial-home

Partial-home installs only. Requires a Mass Save Home Energy Assessment plus installation of the recommended weatherization (typically air sealing and insulation) within one year prior to or up to six months after the heat pump installation.

Financing

Mass Save HEAT Loan

0% APR up to $25,000

Below 135% of State Median Income: 7 years (84 months)
135%–300% of State Median Income: 5 years (60 months)
Over 300% of State Median Income: 3 years (36 months)

Subject to bank underwriting through participating Massachusetts lenders. Covers equipment + installation costs for qualifying high-efficiency upgrades (heat pumps, ductless mini-splits, insulation, water heaters). Households below approximately 81% SMI typically route to Mass Save's no-cost / enhanced-rebate programs rather than the HEAT Loan.

No federal heat pump tax credit applies in 2026.

Section 25C Energy Efficient Home Improvement Credit (heat pump portion) (30% of cost up to $2,000 annually for qualifying heat pump installations (inflation reduction act expansion)) ended for property placed in service after 2025-12-31 under the One Big Beautiful Bill Act (P.L. 119-21).
Section 25D Residential Clean Energy Credit (geothermal portion) (30% of installed cost for ground-source (geothermal) heat pumps, with no dollar cap) ended for property placed in service after 2025-12-31 under the One Big Beautiful Bill Act (P.L. 119-21).

Status as of 2026-05-27: neither 25C nor 25D has been reinstated or replaced by Congress. Pending bills (e.g. H.R. 616) have not advanced. Pre-2026 §25D installs may carry forward unused credits.

Rebate amounts and eligibility verified 2026-05-27 against primary program documentation. We re-check before any publish.

Get a quote using these rates

Who qualifies for the Mass Save rebate

Mass Save heat pump rebates are available to residential electric or gas customers of the six program sponsors. Look up your specific city's electric and gas sponsor in the Mass Save sponsors directory. Customers of Municipal Light Plants (towns like Belmont, Braintree, and Reading) do not participate in Mass Save — they have access to the MLP Zero-Interest Energy Efficiency Loan instead. Income-qualified households may stack significantly higher incentive packages, including the IRA HEAR rebate (up to $8,000) on top of the standard Mass Save tier. Full eligibility detail lives in the Mass Save eligibility guide.

How the install process works

In-home assessment. A Mass Save HPIN installer measures rooms, examines ductwork and the electrical panel, and runs a Manual J load calculation. This step is non-negotiable for rebate eligibility.
Equipment selection. The installer proposes specific make/model heat pump or AC equipment from the Mass Save HPQPL (for heat pumps) or matched to your home (for standard AC).
Quote & rebate paperwork. You receive a written quote with the rebate amount itemized. Sign-off triggers permitting through the local building department.
Installation. Most projects complete in 1–3 days; multi-zone ductless can run 3–5 days. Geothermal loop drilling adds a separate phase.
Rebate processing. Your HPIN installer files the rebate on your behalf — funds typically arrive in 6–10 weeks.

Explore geothermal in detail

Geothermal by Massachusetts city

Frequently Asked Questions

How much does geothermal cost in Massachusetts?: Geothermal (ground-source heat pump) installation in Massachusetts typically costs $30,000–$60,000 depending on loop type and home size. Horizontal loops are cheapest but need open land; vertical-bore loops are standard in dense MA neighborhoods.
Is the 30% federal geothermal tax credit still available?: No. The federal Section 25D Residential Clean Energy Credit — the 30% geothermal credit — expired December 31, 2025 under the One Big Beautiful Bill Act. Property placed in service after that date does not qualify.
How long does a geothermal system last?: The indoor heat pump unit typically lasts 20–25 years; the ground loop itself can last 50+ years. That longevity helps offset the higher upfront cost, especially when paired with current Mass Save geothermal incentives.
Do I need a lot of land for geothermal?: Not necessarily. Horizontal loops need significant open land (roughly a third to half an acre), but vertical-bore loops only need enough yard for a drilling rig and a few small wellheads — workable on most Massachusetts suburban lots.

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