Solar Financing Options 2026: Cash vs. Loan vs. Lease vs. PPA

The most important change is the expiration of Section 25D, the residential federal solar Investment Tax Credit (ITC). As of January 1, 2026, homeowners who purchase a solar system with cash or a loan can no longer claim a 30% federal tax credit on their personal return. This was confirmed in the One Big Beautiful Bill (H.R. 1), signed July 4, 2025. The commercial ITC (Section 48E) remains in effect through 2027 at 30%, but it is only available to businesses — including the third-party companies that own leased and PPA solar systems. This means leased and PPA systems are the only residential solar arrangements that still get a federal tax credit in 2026. The installer claims Section 48E and typically shares those savings through lower monthly payments. According to Ohm Analytics, third-party ownership (TPO) market share grew from 40% to 52% during 2024, and 44% of installers reported that more than half of their 2025 sales used TPO. That number is expected to reach 65% by end of 2026 (Mayer Brown, June 2026).

A cash purchase means you pay the full system cost upfront. In 2026, the national average for residential solar is roughly $2.50–$3.50 per watt before incentives (SEIA/Wood Mackenzie; LBNL Tracking the Sun 2024), putting a typical 8 kW system at $20,000–$28,000. Without the federal tax credit, your net cost is the full gross price minus any state or utility incentives. Pros: You own the system outright. No interest or dealer fees. Highest long-term savings because all the electricity you generate is yours. Adds to home resale value. Cons: Large upfront cost. No federal credit to reduce net price. Payback takes longer without the 30% ITC. Best for: Homeowners with available cash who plan to stay in their home 10+ years and live in a state with high electricity rates.

A solar loan lets you finance the system over 10–25 years. In 2026, loan-sold systems typically carry a premium of 15–30% over cash price due to dealer fees (EnergySage Marketplace Intel). On a $22,000 cash system, a loan might be $26,000–$29,000 before incentives. Loan interest rates in 2026 are in the 5–8% range (Sunwise USA). Like cash, loan buyers receive no federal tax credit. Some state incentives (NY-Sun, Massachusetts SMART, Arizona tax credit) are available regardless of financing type. Loan payments may be close to or slightly above your current electric bill, negating short-term cash flow savings. Pros: No large upfront cost. You own the system after the loan is paid. Potential for long-term savings. Cons: Dealer fees inflate the principal. Interest adds cost. Still no federal credit. Monthly payment may equal or exceed your electric bill savings. Best for: Homeowners who want ownership without the upfront cash, understand the total loan cost including dealer fees, and plan to stay in the home for the loan term.

With a solar lease, a third party owns the system on your roof. You pay a fixed monthly amount, typically $150–$300 depending on system size and market (EnergySage). Lease payments are predictable because the rate is fixed for the contract term (usually 20–25 years). The leasing company claims Section 48E (30% commercial ITC) and passes some of that value through as lower payments. Leases often include monitoring, maintenance, and repairs. You do not benefit from the electricity savings directly — the lease payment replaces part of your utility bill. At the end of the lease, you can typically extend, buy the system, or have it removed. Pros: $0 upfront. Fixed monthly payment that may be lower than your average electric bill. No maintenance responsibility. Only option that still benefits from a federal credit (Section 48E). Cons: You do not own the system. Long-term savings are lower than buying. Can complicate home sale — buyers must qualify to assume the lease. Annual escalator clauses (1–3% yearly increases) are common and can raise payments over time. Best for: Homeowners who cannot or prefer not to make a large upfront investment, want predictable payments, and are comfortable with a long-term contract.

A PPA is similar to a lease but with a different payment structure. Instead of a fixed monthly amount, you pay a per-kilowatt-hour rate for the electricity the panels produce, typically $0.10–$0.18/kWh (EnergySage; SEIA). Your PPA rate is usually lower than your utility's retail rate but may include an annual escalator (1–3%). If the system produces more electricity than you use, most PPAs credit excess generation at a lower rate. Like a lease, the PPA provider claims Section 48E. PPAs are a popular option in states with high electricity rates where the spread between utility rates and PPA rates creates immediate savings. Sunrun, Sunnova, and local installers in California, Massachusetts, and New Jersey are active PPA providers. Pros: $0 upfront. Immediate savings if PPA rate is below your utility rate. Maintenance included. Section 48E credit reduces provider costs. Cons: No ownership. Savings depend on utility rate inflation. Contract terms are complex — escalator clauses, buyout options, and transfer rules vary. Best for: Homeowners in high-rate states who want immediate bill savings with no upfront cost and are comfortable with a variable payment tied to production.

Long-term savings vary dramatically by ownership type. Based on a typical 8 kW system ($22,000 cash price) in a state with $0.14/kWh electricity:

Savings estimates assume utility rate escalation of 4%/year. Actual results depend on local rates, system production, and contract terms. Cash and loan savings are higher but require patience for payback. Lease and PPA savings are lower but immediate.

State incentive eligibility varies by ownership type. Key examples:

• New York: NY-Sun rebate available to all ownership types. State tax credit ($5,000) and property tax exemption apply to owned systems (cash/loan).
• Massachusetts: SMART program payments are available to all ownership types. State tax credit ($1,000) is for owned systems only.
• California: Property tax exclusion applies to all system values regardless of ownership. SGIP battery rebate depends on program rules.
• Arizona: State tax credit up to $1,000 for owned systems only.
• Texas: Property tax exemption applies to solar regardless of ownership, but it is county-specific.

Check DSIRE for your state's full incentive catalog. Many state incentives were designed when the federal credit was universally available and have not been updated for the post-25D landscape. A lease or PPA may qualify for state incentives in some states even when the owner is the third-party provider.

One of the most commonly overlooked differences between ownership models is how they affect selling your home. A system you own (cash or loan) typically adds 3–4% to home resale value (Zillow, LBNL). Buyers see it as an asset with immediate bill savings. A leased or PPA system can complicate a sale. The buyer must qualify to assume the lease or PPA, which requires a credit check and may disqualify some buyers. If the buyer refuses, you may need to buy out the contract (often $10,000–$20,000) or transfer the system to your new home (if permitted). Some lease and PPA providers offer buyout options at declining values over the contract term. When comparing financing options, factor in your expected time in the home. If you plan to move within 5–7 years, a lease or PPA may create complications that a cash purchase or loan would not.

The right option depends on four personal factors: 1. Do you have $20,000–$30,000 available? Yes → Cash purchase maximizes long-term savings but check your state incentives first. No → Move to question 2. 2. Do you plan to stay in your home 7+ years? Yes → A solar loan can work if total cost (including dealer fees and interest) is lower than projected bill savings. No → A lease or PPA may be better since you get savings without a long breakeven timeline. 3. Does your state have strong owned-system incentives? Check NY-Sun, Massachusetts SMART, Arizona tax credit. If state incentives are significant and only available to owners, ownership (cash or loan) gets a boost. 4. Do you want immediate savings or maximum long-term value? Immediate → Lease or PPA. You save from month one with $0 down. Maximum → Cash purchase. Higher long-term value but requires patience. Use the Solar ROI Calculator with your state, monthly bill, and project year to see the numbers for your specific situation. Then use the Quote Review Tool to validate any installer proposal against benchmarks.