Mississippi has 23 verified geothermal contractors and is a cooling-dominated geothermal market where ground-source delivers strong year-round savings versus conventional AC. Federal §25D was terminated by the One Big Beautiful Bill Act (P.L. 119-21) on December 31, 2025, but Entergy Mississippi + Mississippi Power rebates and the §48 commercial credit keep ground-source competitive.
- 23 verified contractors
- 20 cities covered
- ★ 4.8 avg rating (2,356 reviews)
- 16 WaterFurnace dealers
- 1 IGSHPA-certified
Top Mississippi cities for geothermal contractors
Coverage spans Jackson, Gulfport, Hattiesburg, Tupelo. Browse contractors by city below.
Featured Mississippi geothermal contractors
Mississippi geothermal incentives in 2026
The federal §25D Residential Clean Energy Credit was terminated for new residential expenditures completed after December 31, 2025 by the One Big Beautiful Bill Act (P.L. 119-21). 2025 installations carry forward via IRS Form 5695. Mississippi homeowners benefit from:
- Entergy Mississippi + Mississippi Power — Entergy Mississippi and Mississippi Power energy efficiency programs.
- Federal §48 commercial credit remains active through 2034 with phase-down; widely used in third-party-owned residential leases.
For state-by-state matrix see geothermal rebates by state, and use our geothermal tax credit calculator.
Mississippi climate, ground conditions, and permits
Mississippi climate is humid subtropical (Cfa). Ground temperatures at typical loop depth stay around 64–68°F. Mississippi Embayment unconsolidated sediments across most of the state. Both vertical and horizontal loops work well; horizontal loops particularly cost-effective on rural lots.
Closed-loop installations require a Mississippi Department of Environmental Quality (MDEQ)-licensed well driller, a Mississippi State Board of Contractors HVAC license, and a local building permit covering the indoor unit and electrical service. For permit specifics see our geothermal permit lookup.
Frequently asked questions
How much does geothermal cost in Mississippi?
A typical 3-ton residential system in Mississippi runs $20,000 to $34,000 installed depending on loop type, soil conditions, and location. Utility rebates from Entergy Mississippi + Mississippi Power reduce out-of-pocket cost. Federal §25D no longer applies to 2026 residential installations.
Do I need a permit for geothermal in Mississippi?
Yes. Closed-loop installations require a Mississippi Department of Environmental Quality (MDEQ)-certified well driller, a state-licensed mechanical contractor, and a local building permit covering the indoor unit and electrical service. Reputable Mississippi contractors handle the full permit pull.
Vertical or horizontal loops in Mississippi?
Lot size and soil determine loop type. Vertical bores dominate dense suburbs; horizontal loops are cost-competitive on rural lots with adequate land area (1,500–3,000 sq ft per ton). Pond loops work where adequate water access exists. An IGSHPA-trained designer matches loop type to your specific lot, soil, and load.