HVAC technician inspecting residential AC unit

HVAC tax credit 2026: what's still available and what expired

No, the federal HVAC tax credit does not apply to equipment placed in service after 31 December 2025. If your heat pump or air conditioner went in before that date, you can still claim it on your 2025 return. For anything installed in 2026, the main savings routes now run through the HOMES and HEAR rebate programmes, plus state and utility rebates. The installation date, not the purchase or contract date, is what decides everything.

TL;DR:

  • The federal HVAC tax credits end after December 31, 2025, so only equipment installed and in service by that date qualifies for the 2025 tax return.
  • Installing a system in 2026 or later disqualifies from federal credits, regardless of when the purchase or deposit was made.
  • Homeowners can still benefit from state and utility rebates through programs like HOMES and HEAR, which are often first-come, first-served and income or performance based.
  • Proper documentation, including the placement-in-service date and manufacturer PIN or QM code, is essential for claiming rebates or filing taxes, with installers’ invoices serving as key proof.
  • Planning for 2026 upgrades requires focusing on pre-approval, early rebate checking, and accurate installation timing rather than relying on federal tax credits.

Table of Contents

What changed for 2026: the law and IRS updates that ended the credits

Public Law 119-21, known as the One Big Beautiful Bill Act, accelerated the end date for two federal residential energy credits. Section 25C (the Energy Efficient Home Improvement Credit) and Section 25D (the Residential Clean Energy Credit) now apply only to property placed in service on or before 31 December 2025. Anything installed after that date simply doesn’t qualify, regardless of when you signed the contract or paid the deposit.

“Placed in service” has a specific meaning: it’s the date the system is installed and ready for use, not the date you ordered it or handed over a card. A Congressional Research Service analysis of the repeal confirms there’s no transition period and no grandfather clause for orders made before the law passed.

That leaves homeowners with two clean buckets:

  • Installed and running by 31 December 2025? Claim it on your 2025 tax return, filed in 2026.
  • Installing anytime in 2026? The federal 25C and 25D credits are off the table, full stop.

There’s no partial credit for a system that was ordered in November 2025 but not running until February 2026. The IRS goes strictly by completion date, which catches out more homeowners than you’d expect during a busy installation season.

What the old federal credits covered through 2026

If you’re still finalising a 2025 claim, it helps to know exactly what qualified. Here’s how the Energy Efficient Home Improvement Credit and Residential Clean Energy Credit broke down before they expired.

  1. Heat pumps (25C): 30% of cost, capped at $2,000, according to IRS guidance updated in January 2025. This applied to ducted and ductless systems meeting the highest efficiency tier set by the Consortium for Energy Efficiency.
  2. Other improvements (25C): Central air conditioners, furnaces, boilers, insulation and similar upgrades fell under a separate track with a combined annual credit limit per taxpayer.
  3. Combined annual maximum: Heat pumps and the general credit track had separate limits, allowing homeowners to claim credits from both categories in the same year, up to the combined allowable limit.
  4. Solar and geothermal (25D): The Residential Clean Energy Credit offered 30% with no dollar cap, and unlike 25C, unused credit could carry forward to future tax years.

Eligibility also depended on paperwork most homeowners never see: a manufacturer PIN or QM (Qualified Manufacturer) code confirming the specific unit met CEE or ENERGY STAR requirements. The PIN requirement was new for 2025 claims, and its absence is one of the most common reasons a claim gets flagged.

Filing runs through Form 5695, attached to your regular 1040 for the tax year the property was placed in service. The 25C credit is nonrefundable and doesn’t carry forward. If your tax liability is smaller than the credit, you lose the difference. The 25D solar and geothermal credit is more forgiving on that front, letting you roll the excess into future years.

What still helps homeowners in 2026: rebates instead of credits

The federal tax credit is gone, but the money behind two Inflation Reduction Act programmes hasn’t disappeared. HOMES (Home Efficiency Rebates) and HEAR (Home Electrification and Appliance Rebates) are both still funded and operate through state energy offices rather than the IRS. That’s a meaningful difference: instead of waiting until tax season to recoup part of the cost, many of these rebates apply at the point of sale or shortly after installation.

HEAR is income-qualified. Households at or below 80% of area median income typically get the largest rebates, sometimes covering up to $8,000 toward a heat pump, while households up to 150% of area median income usually receive a partial rebate. HOMES works differently: it rewards measured whole-home energy savings verified through an audit, so the payout depends on performance rather than income.

Programme How it’s structured Typical scope
HEAR Income-qualified, point-of-sale discount Heat pumps, electrical panel upgrades, insulation
HOMES Performance-based, tied to measured energy savings Whole-home retrofits verified by audit
State/utility rebates Vary by provider, often stackable with limits Equipment-specific, seasonal promotions

A few things worth knowing before you assume a rebate will be there when you need it:

  • Funds are allocated to states and distributed through their own energy offices, so availability varies enormously by state and can run out mid-year.
  • Rebates are typically first-come, first-served rather than guaranteed like the old tax credit was.
  • Utilities often run their own supplemental rebates on top of HOMES or HEAR, though stacking rules and anti-double-dipping restrictions differ by provider.

Check your state energy office’s website and your utility’s rebate page before booking an installation, not after. Some programmes require pre-approval before work begins.

How to check eligibility and gather your documentation

If you’re claiming a 2025 installation on your upcoming return, or applying for a 2026 rebate, the paperwork trail matters more than most homeowners realise.

  1. Confirm the placed-in-service date. This should be documented on your installer’s invoice or completion certificate, not just the purchase date.
  2. Get the manufacturer PIN or QM code and AHRI certificate. Your installer should provide this automatically; if they didn’t, ask before you file.
  3. Verify the efficiency tier. Check that your unit meets CEE’s highest efficiency tier or the relevant ENERGY STAR standard for the credit or rebate you’re claiming.
  4. Collect all invoices and installer statements. Keep a copy separate from your main tax file in case of an audit.
  5. File Form 5695 with your 1040, using the IRS instructions for the specific tax year, by the standard April 15 deadline.

Rebate applications differ from tax filing in one key way: HEAR often asks for income verification and sometimes pre-approval before the work starts, while HOMES generally needs a pre and post-installation energy audit to prove the savings.

Pro Tip: Ask your installer for a written statement listing the placed-in-service date, model numbers and AHRI or QM/PIN codes on day one. Retrieving this paperwork months later, after the installer has moved on to other jobs, is far harder than getting it at handover.

Hands exchanging HVAC documentation paper

Planning an HVAC replacement in 2026

The maths has shifted, not collapsed. Without 25C or 25D, a 2026 install won’t shave a fixed percentage off your tax bill. For income-qualified households, though, HEAR rebates can outstrip what the old federal credit ever offered, and HOMES rewards a well-planned, well-sized system with real performance data behind it.

Partial view of HVAC condenser installed outdoors

A proper energy audit before installation does two jobs at once: it identifies duct leaks and sizing issues that waste efficiency, and it’s often the documentation HOMES rebates require anyway. Financing remains a sensible route if a rebate won’t cover the full gap, particularly for homeowners weighing payment plans against upfront cost.

Common mistakes homeowners make heading into 2026:

  • Assuming a 2025 deposit or signed contract locks in tax-credit eligibility (it doesn’t; the installation date is what counts).
  • Skipping the manufacturer PIN or AHRI paperwork, then discovering it’s needed for a rebate application months later.
  • Waiting until after installation to check for state or utility rebates, missing pre-approval windows that some programmes require.

Akita’s recommendation for 2026 HVAC upgrades

Correct sizing and thorough documentation matter more now than they did when a flat federal credit smoothed over smaller mistakes. Check your state’s rebate portal before you book anything, not after. An efficient heat pump or AC system still pays for itself over its lifespan through lower energy bills, credit or no credit. The savings math changed. The case for upgrading a tired system didn’t.

— Akita

Get help with installation, paperwork and rebate timing

There are other routes to a 2026 HVAC upgrade. Some homeowners go the DIY documentation route, tracking down PIN codes and audit paperwork themselves after the fact. Others rely on whichever contractor is available fastest, and hope the invoice has what they need come tax season or rebate application time.

Akita

Akita takes a different approach for homeowners planning an install this year: every job includes a detailed invoice with the placed-in-service date, model numbers and efficiency certification recorded properly the first time, so there’s nothing to chase later if you’re applying for a state rebate or filing a carryforward claim from a prior year, as recommended by heat pump servicing in Ireland: book a certified engineer. Our domestic air conditioning installation service covers everything from correct sizing to the paperwork your rebate application will actually ask for, and flexible finance options are available if a rebate doesn’t cover the full cost. Request a quote through our fixed-price installation page and get a system sized right the first time, with the documentation already sorted.

This article is general information, not a substitute for advice from a qualified financial advisor. Consult a qualified financial professional about your own circumstances before acting on anything here.

Sources

Back to blog