If you’re one of the many folks in Camas or Vancouver running a consulting firm, a creative studio, or an e-commerce shop out of your spare bedroom, you’re likely looking for every tax advantage you can get. As we roll into March 2026, tax season is in full swing—and it looks a lot different than it did a year ago.
Following the passage of the “One Big Beautiful Bill” (OBBB) in 2025, the federal residential solar tax credit (Section 25D) officially expired on December 31, 2025. This has left many homeowners wondering if they’ve missed the boat entirely.
However, many local entrepreneurs ask us: “If the personal credit is gone, can my home business buy the solar panels and get the MACRS (Modified Accelerated Cost Recovery System) write-off and the commercial tax credit instead?”
It sounds like a slam dunk. You power your home, protect the environment, and slash your business’s taxable income using the still-active commercial incentives. However, for the vast majority of home-based businesses in Oregon and Washington, the answer is a neighborly—but firm—No.
In this quick read, we’re going to look at the “why” behind these 2026 rules, the specific “exception” cases where business ownership might work, and the remaining local incentives that actually put money back in your pocket.
The 2026 Shift: Why Residential and Commercial Are Now Worlds Apart
For years, homeowners and business owners used similar 30% tax credits. That changed on January 1, 2026. Under the new federal framework:
- Residential Ownership (Section 25D): Expired. Homeowners who buy a system for their personal residence no longer receive a federal tax credit.
- Commercial Ownership (Section 48): Still Active. Businesses can still claim a 30% Investment Tax Credit (ITC) plus MACRS depreciation for systems placed in service through 2027.
Because of this “incentive gap,” many homeowners are trying to reclassify their residential systems as business assets. But the IRS has a very long memory and very strict lines between a “Commercial” property and a “Residential” one. To qualify for business depreciation under IRC Section 48, the equipment must be used for a trade or business in a way that meets the “Predominant Use” test.
The 50% Predominant Use Rule
For a home-based business to even consider MACRS, the solar system must generally be used more than 50% for business purposes. If your solar array is sitting on the roof of your primary residence in Washougal, the IRS typically views it as a personal residential asset regardless of your LLC status.
Think about your daily energy draw: even if you have a dedicated 200-square-foot office, your home’s HVAC system, refrigerator, water heater, and family EV charger are likely consuming the vast majority of that solar power. If your business use accounts for only 10% or 20% of the total energy consumption, the array generally fails the test for the five-year MACRS schedule.
Real-Life PNW Examples: Who Qualifies?
To make this clearer, let’s look at how this applies to our neighbors here in the Portland-Vancouver metro area under the new 2026 tax landscape.
Example 1: The “Basement Office” in Camas (Does Not Qualify)
Sarah runs a graphic design business from her home near Lacamas Lake. Her business is her full-time income, but her panels are on the roof of her family home.
- The Verdict: Sarah does not qualify for MACRS or the commercial ITC. Since her home is her primary residence and the personal energy use outweighs the business use, she cannot claim the system as a business asset.
Example 2: The “Detached Workshop” in Washougal (The Exception)
Mark is a professional furniture maker who built a large, detached shop behind his house in Washougal. The shop is on its own utility meter and is used 100% for his business.
- The Verdict: Mark has a very strong case for MACRS and the 30% commercial credit. Because the structure is a dedicated business building and the energy produced is used solely for his “trade or business,” he can likely claim the commercial benefits even though the shop is on his residential land.
Example 3: The “Hobby Farm” in Amboy (Likely Qualifies)
The Miller family runs a small agricultural operation. They have a solar array that powers their barn, irrigation pumps, and walk-in coolers.
- The Verdict: Yes, they likely qualify. Since the “predominant use” of the energy is for income-generating agricultural activity, they can use MACRS. In fact, in 2026, they might even be eligible for a USDA REAP Grant to cover an additional portion of the cost.
The Danger of “Creative” Accounting
You might see some national blogs or “tax gurus” online suggesting you can pro-rate your solar panels based on the square footage of your home office. While you can often do this with your utility bills, trying to do it with a 25-year capital asset like a solar array is a massive red flag.
The Local Reality: Claiming a 30% business tax credit and MACRS depreciation on a residential rooftop is one of the easiest ways to trigger an IRS audit in 2026. If you’re audited, the burden of proof is on you to prove exactly how much power your business used versus your home. Unless you have a separate meter and a dedicated commercial structure, it’s a battle you’re likely to lose.
Real 2026 Benefits for Home-Based Businesses
While the federal residential credit is gone, 2026 is still a smart year to go solar in the PNW. Local policy is now more important than ever.
1. Energy Trust of Oregon (ETO) Incentives
If you are on the Oregon side (Portland, Gresham, or Hillsboro), you can still tap into Energy Trust of Oregon solar incentives. These are upfront cash-back rebates that were not affected by the federal bill. For 2026, these incentives help bridge the gap left by the expired federal credit.
2. Washington State Sales Tax Exemption
Washington residents still benefit from a sales tax exemptionon solar equipment and labor through December 31, 2029. Per the Washington Department of Revenue, solar systems under 100kW are exempt from the state portion of the sales tax. This effectively gives you a ~9% “discount” right off the top.
3. Third-Party Ownership (TPO) Leases
In 2026, “Third-Party Owned” systems (Leases and PPAs) will become more popular. Why? Because the solar company can still claim the 30% commercial tax credit on the system they install on your roof, and they can pass some of those savings on to you in the form of a lower monthly payment. While you won’t own the panels, it’s the only way for some homeowners to benefit from federal credits in the current climate.
The Sunbridge Solution: Local, No-Pressure Guidance
At Sunbridge Solar, we’ve spent 15+ years helping people in the Vancouver-Portland metro area navigate these shifting rules. We are a B-Corp, which means we prioritize honesty over a quick sale. We will never tell you that you qualify for a business write-off just to get you to sign a contract.
Instead, our residential solar experts will:
- Analyze your 2026 ROI: We’ll show you the actual payback period without relying on expired tax credits.
- Calculate your TSRF: We’ll ensure your panels are placed for maximum sunlight to maximize your utility net metering credits.
- Resilience Planning: We’ll help you decide if a home battery backup is a better investment for your home office than a risky tax strategy.
Stop Guessing and Start Saving
The “One Big Beautiful Bill” changed the landscape, but it didn’t change the fact that the sun is free energy. Whether you’re in Camas, Washougal, or Portland, we’ll give you the straight talk you need to navigate 2026 solar incentives.
Call 360-313-7190 for a free, no-pressure consultation today.
Disclaimer: Sunbridge Solar provides solar installation, not tax advice. Federal and state tax laws change frequently. Following the OBBB Act of 2025, residential tax credits have expired. Always consult with a qualified tax professional before claiming any credits or deductions on your business tax return.
