Heat pumps and insulation can still lower energy use in 2026. But the federal tax picture changed at the end of 2025.
The old Energy Efficient Home Improvement Credit, often called 25C, is no longer available for property placed in service after December 31, 2025. That means a 2026 project needs to stand on its own savings, comfort, and any state or utility rebates you can still use.
Start With Air Leaks and Insulation
Before buying a large heating or cooling system, look for easy waste. Drafts, attic gaps, thin insulation, and leaky ducts can make a good system work harder than it should.
Simple fixes may include weatherstripping doors, sealing attic gaps, adding insulation, and sealing ducts. If you want to tackle small gaps yourself, a basic weatherstripping kit can help with doors and windows.
If summer heat is your main problem, our heat dome safety guide explains why keeping indoor spaces cooler matters during long hot spells.
Why Insulation Comes Before a Bigger System
Insulation slows heat flow. In winter, it helps keep warm air inside. In summer, it helps keep outdoor heat from moving in as fast.
Attics are often a good place to start. Crawl spaces, basement walls, and ducts may also matter, but moisture and ventilation need to be handled correctly first.
A home energy audit can help you find the biggest leaks before you spend money. A simple infrared thermometer can also help you spot temperature differences around doors, windows, and vents, though it does not replace a full audit.
Heat Pumps Can Still Make Sense
A heat pump moves heat instead of making heat in the same way as a furnace or resistance heater. One system can heat in winter and cool in summer.
The best results depend on correct sizing, good ductwork, and a home that is not leaking large amounts of air. Ask the contractor for a load calculation instead of accepting a guess based only on square footage.
Heat pump rebates can still vary by state and utility. For one example of how local programs can differ, see this guide to Massachusetts heat pump rebates in 2026.
Heat Pump Water Heaters Are Worth a Look
Water heating can be a large part of a home energy bill. A heat pump water heater pulls heat from the surrounding air and moves it into the tank.
These units need enough room and airflow. They can also cool and dry the room around them, so placement matters.
What Happened to the Federal 25C Credit?
The IRS says the Energy Efficient Home Improvement Credit ended for property placed in service after December 31, 2025. In plain terms, a new heat pump, insulation job, or other 25C project completed in 2026 does not qualify for that federal credit under current law.
If you completed a qualifying project in 2025, keep your receipts, model numbers, installation records, and tax paperwork. You may still need those records when filing or answering a tax question.
Build the Project Around Real Savings
Without the old federal credit, the math matters even more. Compare the full installed cost, expected energy use, repair history, warranty, and local rebates.
If you are saving for a large home project, our guide to high-yield savings accounts explains one way to keep short-term project money separate while it earns interest.
You can also use the same calm approach in our 2026 money reset guide: know the cost, set a limit, and avoid buying more system than your home needs.
Ask Every Contractor the Same Questions
- What size system do you recommend, and why?
- Did you perform a load calculation?
- What is included in the quoted price?
- What are the parts and labor warranties?
- Are there state, utility, or local rebates available now?
Then compare the bids line by line. A lower price is not always the better value if the system is poorly sized or the quote leaves out needed work.
A Simple Order for 2026
- Check energy bills and comfort problems.
- Seal obvious air leaks.
- Fix moisture problems.
- Add insulation where it makes sense.
- Get several heat pump bids if your old system needs replacement.
- Check current state and utility rebates before signing.
The federal credit may be gone, but a well-planned upgrade can still improve comfort and lower energy use. Start with the house itself, then size the equipment to the smaller load you actually need.
