Solar Lease vs Loan vs Cash Purchase in 2026: Which Saves the Most?

With the 30% federal residential solar tax credit gone as of January 1, 2026, the way you pay for solar has become the single most important financial decision in the process. Cash purchase, solar loan, and solar lease/PPA each carry different economics, ownership structures, and long-term outcomes. This comparison lays out the real numbers so you can choose the financing path that matches your financial situation and goals.

The Three Options

Cash Purchase in 2026

Cash purchase provides the highest total savings over the life of the system — no interest payments, no monthly costs after the initial investment, and full ownership of the equipment. The challenge: without the 30% federal credit, the upfront cost is $5,000–$12,000 higher than it was in 2025. A system that cost an effective $17,500 after the credit now costs a full $25,000.

Cash purchase is most compelling for homeowners in high-rate electricity markets (where the annual savings are largest), those with strong state incentives (New York, South Carolina, Massachusetts), and DIY installers (who reduce total cost by $5,000–$15,000 in labor savings). If you can afford the upfront investment, cash purchase remains the financially optimal choice.

Solar Loans

Solar loans allow you to own the system with no money down (in most cases), paying off the cost over 10–25 years. The advantage over leasing: you own the asset, build equity, and retain all incentive benefits. The disadvantage: interest payments reduce your total savings. A $25,000 system financed at 6% over 20 years costs approximately $42,000 in total payments. Your monthly payment ($179/mo) may or may not be lower than your current electricity bill — do the math for your specific situation.

Without the federal tax credit, solar loan economics are tighter in 2026. In high-rate markets, the loan payment is typically lower than the electricity bill it replaces, creating immediate positive cash flow. In low-rate markets, the loan payment may exceed savings for the first several years before utility rate increases shift the balance. Shop aggressively for loan terms — rates and fees vary significantly between lenders.

Solar Leases and PPAs

In a lease or PPA arrangement, a third-party company installs and owns the solar panels on your roof. You pay a monthly lease fee or a per-kilowatt-hour rate (PPA). The company claims the Section 48E commercial tax credit (still available through 2027) and passes some of the savings to you through lower pricing.

The appeal: zero upfront cost, zero maintenance responsibility, and immediate electricity savings (your lease/PPA payment is typically lower than your utility bill). The downside: you capture a much smaller share of the total economic value compared to ownership. The leasing company profits from the tax credit, depreciation, and the spread between their costs and your payments. Over 25 years, a homeowner who leases saves significantly less than one who purchases.

Watch for annual escalation clauses that increase your lease/PPA rate by 1–3% per year — these can erode savings over the 20–25 year term. Insist on a fixed-rate lease or PPA whenever possible, or negotiate the lowest possible escalator.

For full economics analysis, see our Is Solar Worth It in 2026 guide. For DIY installation savings, check our DIY vs installer comparison.

The Numbers Over 25 Years

Consider a $20,000 system producing $2,400/year in electricity savings (a 7 kW system in a $0.20/kWh market). Assuming 3% annual utility rate increases, total electricity savings over 25 years reach approximately $87,000. With a cash purchase, your net savings are $87,000 minus $20,000 = $67,000 (plus the system's residual value to your property). With a solar loan at 6% over 20 years, total payments are approximately $34,000, leaving net savings of approximately $53,000 — still excellent but reduced by $14,000 in interest. With a lease/PPA averaging $120/month over 25 years, total payments are $36,000, and your net savings are approximately $51,000 — but you own nothing at the end and have no residual property value increase.

These numbers assume no federal tax credit (the 2026 reality) and no state incentives. In states with strong incentives, the cash purchase and loan paths improve further because incentive value goes to the system owner — not the leasing company.

Frequently Asked Questions