How to Pay for a Home Energy Retrofit: Financing Options Compared

Two federal tax credits that used to soften the cost of a home energy retrofit — the Energy Efficient Home Improvement Credit (Section 25C) and the Residential Clean Energy Credit (Section 25D) — both expired for property placed in service after December 31, 2025, under the One Big Beautiful Bill Act. That doesn't mean retrofits stopped making sense; it means the financing method now carries more of the weight it used to share with a tax credit.

The main options

| Option | Typical rate range | Collateral | Best for | |---|---|---|---| | HELOC (Home Equity Line of Credit) | Variable, tied to prime rate | Your home | Homeowners with equity, flexible draw as project costs come in | | Home equity loan | Fixed | Your home | A single, known project cost, predictable payments | | Energy-Efficient Mortgage (EEM) | Rolled into primary mortgage rate | Your home (as part of purchase/refinance) | Buying or refinancing and bundling efficiency work into one loan | | PACE (Property Assessed Clean Energy) | Fixed, repaid via property tax bill | Property tax lien | No-equity-check options in participating areas; ties to the property, not the person | | On-bill utility financing | Often low or 0% | None beyond the utility account | Smaller projects, utility-approved equipment, no separate loan application | | Manufacturer/contractor financing | Varies widely, sometimes promotional 0% | Varies | Fast approval, but compare the real APR after any promotional period |

Why this matters more now than it did in 2024–2025

With Section 25C and 25D active, the after-tax-credit cost of a project was lower than sticker price by up to 30%, which meant a straightforward loan or even cash often made sense on its own. With both credits gone for 2026 installs, the gap a good financing choice can make — a 0% on-bill utility loan versus a high-APR contractor financing plan, for example — has a proportionally bigger effect on whether the project pencils out at all.

PACE financing: the trade-off that surprises people

PACE financing is repaid through your property tax bill and doesn't typically require a traditional credit check, which makes it accessible to homeowners who might not qualify for a HELOC. The trade-off: PACE liens are attached to the property, and some conventional mortgage lenders require the PACE balance be paid off (or subordinated) before refinancing or selling — this varies significantly by state and lender, so it's worth understanding your specific state's PACE rules and any lender restrictions before assuming it's a clean, no-downside option.

What's left to actually reduce the cost

• Utility rebates. Independent of any federal tax credit, and worth checking regardless of which financing option you choose.
• DOE Home Energy Rebates (HOMES and HEAR/HEEHR). These IRA-funded rebate programs, unlike the expired tax credits, are separately appropriated and still rolling out state by state — HOMES for whole-home retrofit projects (up to $8,000, available at all income levels, larger for bigger modeled savings), and HEAR for income-qualifying households electrifying specific equipment (up to $14,000, covering up to 100% of cost for lower-income households). Availability depends entirely on whether your state has launched its program — check your state energy office or the DOE's Home Energy Rebates page directly.
• State-level programs. Some states have stood up their own rebate or low-interest loan programs independent of the federal ones — worth checking alongside the federal rebate status.

Comparing financing to your actual payback

A cheap loan on a project with a 15-year payback is a very different decision than the same loan on a project with a 4-year payback — financing cost and project payback period need to be weighed together, not separately. Use our Payback Period Comparison Calculator to compare cash, loan, and other financing scenarios side by side for your specific project cost and expected savings.

FAQ

Is PACE financing available everywhere? No — it's authorized state by state and even then often only in participating municipalities. Availability and rules vary significantly; check your specific state and locality rather than assuming national availability.

Does a HELOC or home equity loan affect my ability to sell later? Any lien against the home needs to be settled (paid off or transferred) at sale, same as a mortgage — this is a normal part of a home sale, not a special retrofit-financing complication.

Are HOMES and HEAR rebates instead of financing, or in addition to it? In addition — a rebate reduces net project cost, but you likely still need financing (or cash) to cover the cost upfront, with the rebate arriving as a point-of-sale discount or after-the-fact reimbursement depending on the program.

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