Rental Property Solar Tax Credits: What Still Applies in 2026

Rental property solar installations qualified under Section 48E, not the expired Section 25D — and that distinction still matters in 2026. Landlords could claim the 30% federal Investment Tax Credit for solar on rental properties, plus depreciation benefits that primary residences never had, but only for projects that began construction before the July 4, 2026 deadline, which has now passed. For projects that did not meet that construction-start deadline, the 48E credit is no longer available — but 100% bonus depreciation, MACRS, and state-level incentives still apply to new rental solar systems.

Why Rental Properties Qualify Differently

The IRS treats rental properties as business/investment assets, not personal residences. Solar installations on rental properties fall under Section 48E (Clean Electricity Investment Credit), the same credit used for commercial installations. Section 48E was not affected by the Section 25D expiration.

This creates an unusual situation where a landlord installing solar on a rental unit has better federal tax benefits than a homeowner installing solar on their own house.

Eligibility Requirements

To claim the Section 48E credit for a rental property:

1. The property must be a rental/investment property, not your primary residence. It can be a single-family rental, multi-family building, or mixed-use property.
2. Construction had to begin before July 4, 2026. This could be satisfied two ways: the Physical Work Test (actual physical work of a significant nature starting on the project) or the 5% expenditure safe harbor, which was RESTORED on June 6, 2026 when a federal court vacated IRS Notice 2025-42 (Oregon Environmental Council v. IRS, No. CV-25-4400; the IRS may appeal).
3. The system must be placed in service within 4 years of beginning construction.
4. Panels must be FEOC-compliant. Prohibited foreign manufacturers disqualify the credit.
5. You must have tax liability to use the credit (or carry it forward/back).

The Full Tax Benefit Stack

For a rental property, the tax benefits are substantial:

• 30% Investment Tax Credit (Section 48E) on total eligible costs
• +10% domestic content bonus if qualifying US-made panels are used
• +10% energy community bonus if the property is in a qualifying area
• MACRS depreciation: 5-year accelerated depreciation on solar equipment
• Bonus depreciation: 100% first-year bonus, made permanent by the OBBBA (P.L. 119-21) for property placed in service after January 19, 2025 (IRS Notice 2026-11, IR-2026-06)
• Operating expense deductions: maintenance, insurance, monitoring costs

For a $25,000 solar installation on a rental property:

• ITC at 30%: $7,500
• Depreciation benefit (approx 21% bracket): $4,000-$5,000
• Total federal tax benefit: $11,500-$12,500 (46-50% of cost)

How to Claim the Credit

1. File IRS Form 3468 (Investment Credit) with your tax return in the year the system is placed in service.
2. Document beginning of construction: keep contracts, deposit receipts, and dated photos of physical work.
3. Keep manufacturer FEOC documentation: panel country-of-origin certification from the installer.
4. File Form 4562 for depreciation (MACRS + bonus depreciation).
5. Retain all records for at least 3 years after filing.

Common Scenarios

Single-Family Rental

A landlord installs a 7 kW system on a single-family rental property. Cost: $21,000. The 48E ITC is worth $6,300. Depreciation adds another $3,500-$4,500. The tenant benefits from lower electricity bills, and the landlord can charge higher rent (solar-equipped rentals command a premium of $50-$150/month in many markets).

Multi-Family Building

For a 4-unit building with a shared 20 kW system ($60,000), the ITC is worth $18,000, plus $10,000+ in depreciation benefits. Multi-family installations may also qualify for the low-income bonus credit (+10-20%) if the building serves low-income tenants.

Mixed-Use Property

A property with a ground-floor commercial space and residential units above. The solar system benefits both uses. The commercial portion is claimed under Section 48E; allocation between commercial and residential portions follows IRS cost-segregation rules.

What About Tenants?

Tenants in rental properties with solar benefit from lower electricity bills but don't claim any tax credits; the landlord claims the credit as the property/system owner. If you're a tenant interested in solar, you'd need to look at a community solar program or negotiate a lease arrangement with the property owner.