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Understanding Tax Credits for Energy-Efficient Air Conditioner Replacement in California


Content provided for general information. Talk to your advisor to learn about recent updates or other rules that may apply to your situation.

Dealing with a failing air conditioner can be frustrating, especially when it occurs shortly after purchasing a new home. The good news is that there are tax credits available to incentivize homeowners to make energy-efficient upgrades. However, when you have a home warranty that contributes to the cost, it's natural to wonder whether you can still claim these credits. In this blog post, we will explore the possibilities of getting a tax credit for an energy-efficient air conditioner replacement, even if your home warranty covered part of the cost. We will focus on both federal and California state incentives.

Understanding Energy-Efficient Tax Credits

Energy-efficient tax credits are designed to encourage homeowners to reduce their energy consumption and lower their carbon footprint. These credits can help offset the cost of upgrading to more energy-efficient appliances, such as air conditioners. In general, tax credits are typically offered at the federal and state levels, but they have specific requirements and guidelines.

Federal Tax Credits

The Federal government has historically offered tax credits for various energy-efficient home improvements, including air conditioner replacements. However, the availability of these credits and their specific requirements can change over time. As of my last knowledge update in January 2022, the federal government provided a tax credit for the installation of energy-efficient HVAC systems.

The key details for the Federal Residential Renewable Energy Tax Credit (often referred to as the "solar tax credit") as it related to air conditioners included:

  1. Qualifying Equipment: To be eligible for the federal tax credit, your air conditioner replacement must meet specific energy-efficiency standards. Typically, Energy Star-rated models would qualify.
  2. Credit Amount: The credit amount was 26% of the cost of the qualified equipment, including installation, with a cap on the credit amount.
  3. Expiration Date: The federal tax credit had an expiration date, and homeowners needed to install the eligible equipment before that date to claim the credit. However, these dates could be extended or changed by legislative action.

California State Incentives

California is known for its commitment to energy efficiency and environmental sustainability. As of my last knowledge update in January 2022, the state offered various incentives to encourage energy-efficient upgrades. One of these incentives was the California Solar Initiative (CSI) Thermal Program.

The CSI Thermal Program provided financial incentives to homeowners who installed solar thermal systems, which could include solar water heating and space heating. While this program did not directly apply to air conditioning systems, it reflected the state's commitment to energy-efficient solutions.

Home Warranties and Tax Credits

Now, let's address the central question: Can you still get a tax credit for energy-efficient air conditioner replacement even if your home warranty paid for part of it? The answer may depend on the specific terms of your home warranty and the tax credit program you want to take advantage of.

  1. Home Warranty Coverage: Home warranties typically cover the repair or replacement of specific home systems and appliances. While they can reduce your out-of-pocket expenses, they may not cover the cost of energy-efficient upgrades, such as a higher-rated air conditioner model. It's important to review your home warranty contract to understand its limitations.
  2. Tax Credit Eligibility: To claim an energy-efficient tax credit, your new air conditioner should meet certain energy-efficiency criteria. If your home warranty contributed to the replacement of your old system with a more energy-efficient one, you may still be eligible for the credit. The key is that the new system must meet the required standards.
  3. Documentation: Proper documentation is crucial when claiming tax credits. Ensure that you have invoices, receipts, and records of the installation that prove your system's eligibility for the credit.
  4. Consult a Tax Professional: Tax laws and regulations can change, and their interpretation can be complex. It's advisable to consult a tax professional who is knowledgeable about the latest tax credits and can guide you through the process of claiming them.


Given the situation you described, where your home warranty partially covered the cost of the air conditioner replacement, it's possible that you can still claim a tax credit if the new unit meets the necessary energy-efficiency standards. To ensure you take full advantage of available credits, consider consulting a tax professional who can provide guidance specific to your circumstances and the most up-to-date information on tax incentives in California and at the federal level. Remember to keep thorough records of your air conditioner replacement and related expenses for tax purposes.