Capturing Solar Tax Credits: What CRE Owners Need to Do Before the Deadlines

Under current federal tax credit rules, many commercial solar projects can preserve eligibility for ITCs by establishing a qualifying construction start date before July 4, 2026. For commercial real estate owners, one of the most practical ways to achieve this may be through the "5% Safe Harbor" provision.

Under IRS guidance, the 5% Safe Harbor provision allows certain commercial solar projects at or below 1.5 MW AC to establish a qualifying construction start date by incurring at least 5% of total project costs before the July 4, 2026, deadline. These are typically "behind-the-meter" systems designed primarily to serve onsite building energy demand. Once a qualifying construction start date is established, projects have up to four additional years to achieve "Placed in Service" status while preserving tax credit eligibility.

For many CRE rooftop and carport solar projects, the sub-1.5 MW AC category may represent a particularly attractive threshold because it can provide greater flexibility in how projects preserve tax credit eligibility under current rules. This may be especially valuable for portfolio owners balancing capital planning, permitting timelines and phased project deployment across multiple properties.

Projects may also establish a qualifying construction start date through the IRS "Physical Work Test," which generally requires demonstrating physical work of a significant nature before the July 4, 2026, deadline. Examples may include installing solar racking, placing transformer pads or related electrical infrastructure, or initiating manufacturing of project-specific components under binding contracts. Like the 5% Safe Harbor pathway, projects that satisfy the Physical Work Test before the deadline also benefit from the same four-year continuity period.

For many CRE owners, these pathways may create opportunities to prioritize projects that can move quickly while maintaining flexibility for broader solar deployment strategies across a portfolio.

The Placed-in-Service Deadline Remains Viable

Projects that do not establish a construction start date before July 4, 2026, may still qualify for federal solar tax credits if they are fully "Placed in Service" by Dec. 31, 2027.
While this pathway offers less long-term flexibility than the Safe Harbor approach, it remains achievable for many commercial rooftop solar projects, particularly in markets with more streamlined permitting and utility interconnection processes.

To satisfy IRS requirements, projects generally must be fully installed, operational and capable of producing electricity for their intended function. In certain cases, projects delayed solely by utility interconnection timelines may still qualify if the system is otherwise complete, tested and ready for operation. Given the complexity of these determinations, early coordination with experienced consultants is becoming increasingly important.

A PPA Option for Owners Seeking Flexibility

For owners who do not want to fund solar installations directly, Power Purchase Agreements (PPAs) may provide an alternative path to accessing the benefits of solar without upfront capital expenditures.

In many cases, solar developers and PPA providers have already established Safe Harbor eligibility for equipment or project pipelines. CRE owners who enter into qualifying PPA arrangements before the July 4, 2026, deadline may still benefit from lower electricity costs and long-term pricing stability, while the developer retains ownership of the system and associated tax benefits. Many agreements also include future buyout options after applicable tax recapture periods expire.

How CRE Owners Can Take Action

With these timelines in mind, the opportunity is less about deciding whether solar makes sense and more about how to move quickly and strategically to preserve available incentives.
A proactive approach typically includes several key steps:

Portfolio Screening and Prioritization. Owners should begin by identifying which assets are viable candidates for rooftop solar. Industrial and logistics properties with large, flat, unobstructed roof areas, retail portfolios with repeatable layouts, multifamily assets with carport potential, and other assets with large surface parking areas suitable for carport solar are often strong starting points, particularly where shading is limited.

Roof age and condition are also key considerations, as older roofs may require replacement or upgrades before installation. Early coordination with solar consultants can help avoid conflicts, preserve warranties and ensure projects can move forward on the required timeline.

Early Feasibility and Engineering. Conducting feasibility and engineering assessments early in the planning stages allows owners to assess system sizing, structural considerations and financial returns. This step is essential to determine which assets can realistically meet either timeline.

Strategic Phasing. Rather than approaching solar as a single large capital project, many owners are taking a phased approach, prioritizing assets that can move quickly while building a pipeline of future installations. Early involvement from engineering consultants can help owners prioritize projects that are best positioned to advance within the required development timelines.

For owners who have already evaluated rooftop solar but have not yet advanced projects into procurement or construction, the current deadlines may create an opportunity to revisit previously deferred assets. In some cases, projects that are not positioned for full completion by 2027 may still qualify for Safe Harbor treatment if required spending or construction milestones are met before July 2026.

Alignment with Capital Planning. Integrating solar into broader capital improvement plans can help owners manage upfront costs while maximizing long-term returns. This is particularly relevant for portfolio owners seeking to standardize energy strategies across multiple properties.

Why Solar Still Makes Sense for CRE

While tax credits are an important driver, rooftop solar can also provide long-term operational and financial benefits for commercial real estate owners.

Rooftop solar can help reduce utility expenses, improve net operating income (NOI), increase asset value and marketability and provide greater long-term energy cost predictability. When paired with battery storage or backup power capabilities, solar may also support broader energy resilience strategies for certain property types.

Even as incentives phase down, solar projects may still be financially viable in many markets. Current tax credits, however, can significantly improve project economics and accelerate payback periods, making near-term action especially attractive.

A Narrow but Actionable Window

The opportunity to preserve federal solar tax incentives for commercial real estate projects remains available, but the timeline to act is increasingly defined by near-term financial and construction milestones.

For CRE owners evaluating rooftop solar across their portfolios, the 5% Safe Harbor pathway may provide the clearest opportunity to preserve flexibility while securing available tax benefits before current deadlines take effect. At the same time, projects capable of reaching Placed in Service status by the end of 2027 may remain viable in many markets.
Owners who begin evaluating assets, coordinating with technical advisors, and establishing project strategies now will be best positioned to maintain flexibility and maximize project economics in a rapidly changing regulatory environment.