This Tax Day Is the Last One That Comes With a Solar Bonus

Every April, millions of Americans sit down with a shoebox full of receipts, a tax preparer, or a screen full of TurboTax prompts and try to make sense of what the federal government owes them, or what they owe the federal government. This year, that ritual carries a particular weight for anyone who installed solar panels on their home in 2025, or who has been carrying forward unused solar credits from a previous installation.

April 15th, 2026 is the last Tax Day where the federal solar investment tax credit will appear on a homeowner's return for a new installation. The credit, which covered 30 percent of the total cost of a residential solar system, was eliminated for homeowner-owned systems when the One Big Beautiful Bill was signed into law on July 4th, 2025. Systems installed by December 31st, 2025 still qualify. After that, the 25D residential clean energy credit is gone.

That makes this filing season a kind of closing chapter. And for homeowners on both sides of the refund line, it's worth understanding exactly what that chapter contains.

If You're Expecting Money Back

For homeowners who installed solar in 2025 and are expecting a tax refund this year, the solar credit functions as a bonus on top of what you'd already receive. The credit is claimed through IRS Form 5695, which calculates 30 percent of your total qualified solar costs, including panels, inverters, battery storage, and installation labor. That figure then reduces your federal tax liability dollar for dollar.

Here's what that looks like in practice. Say you're a dual-income household earning $130,000 a year. After the standard deduction, your federal income tax liability for 2025 lands around $15,000, and your combined withholding through the year was $17,000. Without solar, you'd be looking at a $2,000 refund. Now add a solar installation that cost $25,000. Thirty percent of that is $7,500 in tax credits. Your $15,000 liability drops to $7,500, which means your refund jumps from $2,000 to $9,500.

That is real money. And it arrives in a single return, applied directly against what you owe.

One important detail: the solar credit is nonrefundable, meaning it can reduce your tax liability to zero but won't generate a refund on its own. If your credit exceeds your liability, the unused portion carries forward to future tax years, up to 7 years, until it's fully used. So even if you don't capture the full value this April, the remaining credit stays in your pocket for next year's filing and beyond.

If You're Expecting to Owe

The other side of the table is just as compelling, and often overlooked. If you're a homeowner who typically owes money on April 15th, the solar credit can be the difference between writing a large check and writing a much smaller one, or none at all.

Consider a household where both partners are self-employed, or where investment income, rental properties, or other factors push the tax bill higher than what was paid in through withholding or estimated payments. A $5,000 or $10,000 balance due in April is not unusual in those situations. For these taxpayers, a $7,500 solar tax credit doesn't just soften the blow. It can eliminate it.

And it's worth remembering that many of the homeowners who owe at tax time are precisely the ones with higher incomes and larger tax liabilities, which means they're more likely to capture the full value of the credit in a single year without needing to carry any forward.

If you installed solar in 2025 and you're dreading what your accountant is about to tell you, Form 5695 might be the best news in your return.

What's Left After the Credit Disappears

The federal tax credit for homeowner-owned solar systems is gone for any installation completed after December 31st, 2025. That door has closed. But it hasn't closed on every path to savings.

Third-party ownership still carries a federal benefit. Solar leases and power purchase agreements, where a company owns the system on your roof and you buy the electricity it produces, still qualify for the Section 48E business investment tax credit through the end of 2027. The solar company claims the credit and passes the savings through to the homeowner in the form of lower rates. It's a different structure than owning your system outright, but it's currently the only way for a homeowner to access a federal tax benefit for a new residential solar installation.

California's property tax exclusion is still in effect, for now. If you install solar on your home before January 1st, 2027, the added value of that system is excluded from your property tax assessment. Solar installations can add $15,000 to $25,000 to a home's market value, but under this exclusion, your property taxes won't increase. That benefit lasts as long as you own the home. It's quiet, but over a 20 or 25 year ownership period, it adds up to thousands of dollars in avoided taxes.

Net billing still reduces your electric bill. Under California's current NEM 3.0 policy, surplus electricity your panels produce flows back to the grid and earns credits on your PG&E bill. The export rates under NEM 3.0 are lower than they were under the previous policy, which makes battery storage a more important part of the equation. But the fundamental value proposition holds: every kilowatt-hour your system produces is a kilowatt-hour you don't have to buy from PG&E at retail rates that continue to climb.

SGIP battery rebates remain available for qualifying households. California's Self-Generation Incentive Program offers rebates on battery storage, with the most substantial incentives reserved for low-income households and those in high fire-threat districts, which includes much of Humboldt County. The general market budget is currently waitlisted, but the equity and equity resiliency budgets continue to provide meaningful support.

The Larger Math

Even without the federal tax credit, the economics of solar in Humboldt County remain strong for many homeowners. PG&E's rates have increased steadily year over year, and there is no indication that trend is reversing. A solar installation locks in your cost of electricity for 25 years or more. The credit made the upfront cost easier to absorb, and its absence changes the payback timeline. But it doesn't change the direction of the math.

For homeowners who installed solar in 2025, this Tax Day is the moment those savings become tangible on a federal return. For homeowners who didn't, the question is no longer whether to act before the credit expires. It's whether the remaining incentives, the rate trajectory, and the long-term value of energy independence make solar worth it on their own terms.

For most households in this part of California, they do.

If you're filing your 2025 taxes and have questions about how to claim your solar credit, your tax preparer will walk you through Form 5695. If you're considering solar now and want to understand what the current landscape looks like without the federal credit, schedule a free consultation with Six Rivers Solar. The team has been helping Humboldt County homeowners navigate these decisions for over 45 years, through every policy shift along the way.