Geothermal Heat Pump Tax Credit for Homeowners in 2026

TL;DR: The federal geothermal heat pump credit is claimed under IRS Code §25D on Form 5695 and generally applies to a home the taxpayer uses as a residence — not to a property that's purely a rental. The credit rate and expiration date have shifted in recent legislation, so confirm the current percentage on IRS.gov before you file rather than relying on an older figure. Landlords installing geothermal in a rental unit should look at depreciation instead, where bonus depreciation is now 100% and permanent for qualifying property acquired after January 19, 2025.

_Last reviewed: August 2026 · 7 min read_

You've priced out a geothermal system, heard there's a tax credit attached to it, and now you're trying to figure out whether it actually applies to your situation. The rules split sharply depending on whether the home is where you live or a property you rent out, and the credit's own numbers have moved recently enough that an old blog post or a friend's memory isn't a safe source.

Okoniq Property Hub logs equipment purchases, invoices, and manufacturer certifications in one place so you have the paper trail ready whenever you or your CPA need to substantiate a credit or a depreciation deduction.

What is the geothermal heat pump tax credit, and who can claim it?

The geothermal heat pump credit lives inside the Residential Clean Energy Credit, IRS Code §25D, and it's filed on Form 5695. It rewards homeowners who install qualifying geothermal heat pump equipment in a home they use as a residence — it isn't limited to your primary home, but the property generally has to be one you personally live in for at least part of the year, not a unit that's rented out full-time to someone else.

The percentage of the cost the credit covers, and the year it's scheduled to wind down, have both been affected by recent legislation. Rather than repeat a rate that may no longer be current, the right move is to pull up the current Form 5695 instructions on IRS.gov or ask a CPA before you calculate anything. Getting the rate wrong doesn't just cost you money — it can trigger a notice if the IRS's number doesn't match yours.

Does a landlord's rental property qualify, or only an owner-occupied home?

A property that's purely a rental, one you don't live in yourself, typically doesn't qualify for the §25D residential credit. The credit is built around personal residences, so a duplex where you occupy one unit and rent the other may let you claim the credit on your share, while a single-family rental you've never lived in generally won't.

For landlords in that second situation, the more useful path is treating the geothermal system as a capital improvement to the rental property and recovering its cost through depreciation instead of a residential credit. That's a different mechanism entirely, and it's worth understanding the capitalize vs. expense decision tree before you decide how to book the cost, since a geothermal install almost always counts as a capital improvement rather than a repair.

How does installing geothermal affect depreciation and cost basis on a rental?

Installing a geothermal system in a rental property adds to the property's cost basis and gets recovered through depreciation, and part of that equipment may now qualify for full first-year write-off. Bonus depreciation is 100% and permanent for qualifying property acquired after January 19, 2025 under the One Big Beautiful Bill — a significant change from the phase-down schedule that applied to earlier purchases. If you bought or contracted for the system before that date, different rules apply, so the acquisition date matters as much as the installation date.

A cost segregation study can help separate the geothermal system's components — ductwork, wellfield, indoor units — into the categories that recover fastest, which matters more now that 100% bonus depreciation is on the table. Smaller components billed separately, under $2,500 per invoice or item, may also qualify for the de minimis safe harbor and be expensed outright instead of depreciated. Whichever route applies, the deduction gets reported on Form 4562, not Form 5695.

| | Owner-occupied home | Rental-only property | |---|---|---| | Credit type | §25D Residential Clean Energy Credit | Not eligible for §25D | | Filed on | Form 5695 | N/A | | Recovery method | Direct credit against tax owed | Depreciation over the property's recovery period | | Bonus depreciation available | No | Yes, 100% for property acquired after Jan 19, 2025 |

What paperwork and records should you keep to claim this credit?

You need the manufacturer's certification statement, the itemized installer invoice, and proof of when the system was placed in service, and you should keep all three for as long as you might need to defend the credit or the depreciation schedule on audit. The certification confirms the equipment meets the efficiency standards the credit requires, and without it, a claim can be denied even if the equipment itself qualifies.

Scanned or photographed copies are acceptable to the IRS as long as they're legible and complete, which is worth knowing before you dig through a filing cabinet — see how the IRS treats digitized receipts for the specifics. Landlords who are claiming this through depreciation rather than a credit should also build the kind of audit trail auditors actually ask for: the invoice, the placed-in-service date, and the depreciation schedule that ties back to Form 4562.

What other energy-efficiency upgrades get similar treatment?

Other home energy improvements — solar panels, battery storage, certain windows and insulation — fall under related but separate credit categories with their own rules and their own current rates. Don't assume the geothermal rate applies to a different upgrade just because both show up on the same Form 5695; each category has its own qualifying criteria and its own percentage, and both have been touched by recent legislation. Check the specific line item on the current Form 5695 instructions rather than assuming consistency across categories.

FAQ

Can I claim the geothermal credit if I rent out part of my home?

If you live in part of the property and rent out the rest, you can generally claim the credit on the percentage attributable to your personal living space, while the rented portion is handled through depreciation. A CPA can help split the cost accurately based on square footage or unit count.

Is there a cap on how much geothermal credit I can claim?

Caps and rates have changed with recent legislation, so don't rely on a memorized number. Check the current Form 5695 instructions on IRS.gov or ask your CPA for the figure that applies to your installation year.

Does the geothermal system need to meet a specific efficiency standard?

Yes, qualifying geothermal heat pumps must meet Energy Star or equivalent efficiency requirements at the time of installation, and the manufacturer provides a certification statement confirming this. Keep that document with your tax records.

What if I installed the geothermal system years ago and never claimed the credit?

If you missed claiming an eligible credit in a prior year, you may be able to fix it. Look into filing an amended return for a missed deduction and talk to a CPA about how far back you can go.

Does a geothermal install change my property's cost basis when I sell?

Yes. A capital improvement like a geothermal system increases your cost basis, which affects your gain calculation at sale and interacts with depreciation recapture if the property was ever a rental. Review how depreciation recapture works at sale before you list the property.

<div class="glass rounded-2xl p-5 mt-7 max-w-4xl border border-red-400/30 bg-red-500/5"> <div class="flex items-start gap-3"> <span class="text-2xl flex-shrink-0">⚠️</span> <div class="flex-1 min-w-0"> <p class="text-red-200 text-sm font-bold">Not tax advice</p> <p class="text-slate-300 text-xs mt-1 leading-relaxed"> This post assumes a standard homeowner or landlord scenario and cites only bonus depreciation and de minimis safe harbor figures verified against IRS.gov on 2026-07-15. It does not account for the current geothermal credit percentage or expiration date, your filing status, your state, your entity type, or legislation after July 2026. Tax rules change and depend on your specific situation. Talk to a licensed CPA before acting on anything here, and confirm current figures on IRS.gov. </p> </div> </div> </div>