Solar Lease vs PPA vs Buy: Which Solar Financing Option Is Right for You?
Solar installations today come with three distinct ownership paths: lease, power purchase agreement (PPA), or outright purchase with cash or a loan. All three put panels on the same roof and reduce the same electric bill — but they differ fundamentally in who owns the equipment and what the homeowner pays over 25 years. Ownership also decided who captured the federal Section 25D tax credit — a question that settled itself when that credit expired December 31, 2025. A lease locks in a fixed monthly payment regardless of how much sun hits the panels; a PPA charges only for the kilowatt-hours actually generated; outright purchase requires $18,000 upfront (or financed) but delivers the highest 20-year return. This page compares all three paths across upfront cost, monthly obligation, 20-year net savings, ownership equity, maintenance burden, and the historical tax credit question — so you can match the right option to your financial situation.
Who benefits most from each option?
Solar Lease
A solar lease works best if you
Lease buyers get solar on the roof for $0 down and a predictable monthly bill. The tradeoff is giving up ownership, equity, and the federal tax credit — and signing a 20-year contract with an escalator clause that increases the payment 2–3% per year.
Have no liquid capital for a down payment and cannot qualify for a solar loan
Want a fixed, predictable monthly solar payment for budgeting simplicity
Plan to stay in the home at least 15+ years and can handle lease assignment at sale
Are in a low federal tax bracket where the Section 25D credit would go unused anyway
Live in a market where installer competition keeps lease rates below utility retail
Power Purchase Agreement (PPA)
A PPA works best if you
PPA buyers pay only for what the panels produce — shifting production risk to the third-party owner. If cloud cover reduces output, the provider bears the loss. The starting rate is typically below retail utility cost, but the 2–3% annual escalator clause requires careful 25-year math before signing.
Prefer variable costs tied to actual solar production rather than a fixed monthly charge
Want to transfer production risk (weather, inverter failure) to the system owner
Are uncertain about long-term utility rate trends and prefer the lower Year 1 PPA rate
Cannot access tax credit value (low tax liability) and prefer a simple pay-per-kWh model
Want no upfront cost and no maintenance obligation for the system life
Buy Outright (Cash or Loan)
Buying outright works best if you
Outright buyers own the asset from day one — and owned the tax credit with it while Section 25D was in force. That credit (30% of installed cost) flowed to the homeowner's tax return rather than the installer, but it expired December 31, 2025, so a 2026 purchase carries the full gross cost. Twenty-year net savings are still typically $10,000–$18,000 higher than lease or PPA for a comparable system, because ownership avoids the escalator rather than because of any credit.
Have $12,000–$18,000 cash (or qualify for a 5–8% APR solar loan)
Had federal tax liability in the installation year while the 30% credit still existed (it expired December 31, 2025)
Plan to stay in the home 7+ years to reach payback and maximize long-term ROI
Value system ownership and SRECs (Solar Renewable Energy Credits) in applicable states
Want the simplest home-sale process — owned system transfers as part of property value
Side-by-side comparison
The table below compares the three financing paths for a 6 kW solar system at $18,000 gross installed cost. Electricity rate: $0.14/kWh. Lease/PPA escalator: 2.5% annually. Buy (Loan): 7% APR, 12-year term. No federal tax credit is applied: Section 25D expired December 31, 2025, so a 2026 or later installation carries the full gross cost. Verify current credit status with the IRS and a tax professional before assuming otherwise.
Solar lease vs PPA vs outright purchase comparison
Comparison
Solar Lease
Power Purchase Agreement (PPA)
Buy Outright (Cash or Loan)
Day-one out-of-pocket
$0 — no upfront payment
$0 — no upfront payment
$18,000 cash; $0–$1,000 typical for a solar loan
Year 1 monthly obligation
About $115/month (fixed, escalates ~2.5%/yr)
About $100/month (8,500 kWh/yr × $0.10/kWh ÷ 12)
Cash: $0. Loan: about $185/month at 7% APR for 12 years
Who owns the solar panels
Third-party owner (leasing company)
Third-party owner (PPA provider)
Homeowner — full title from day one
Federal Section 25D tax credit
Lessor claims the credit — homeowner gets nothing
Provider claims the credit — homeowner gets nothing
Homeowner owned the credit — but Section 25D expired December 31, 2025, so $0 today
20-year total amount paid
About $35,200 (escalating lease payments)
About $30,800 (escalating kWh payments)
Cash: $18,000 (the $12,600 net assumed the expired 30% ITC). Loan: about $26,640 principal + interest
Who handles maintenance & repairs
Third-party owner — inverter, panel, and wiring covered
Third-party owner — performance guarantee included
Homeowner — typically covered under 25-yr panel + 10-yr inverter warranty
Home sale transfer process
Lease assignment to buyer (requires buyer credit approval); adds friction
PPA transfer to buyer (requires buyer credit approval); adds friction
System stays with property; typically increases appraised value
Based on assumptions in /methodology. Actual figures depend on your installer quotes, local utility rate, loan terms, and tax situation. Treat these as planning ranges, not commitments. Consult a certified solar installer for equipment quotes and a financial advisor for financing comparisons.
Last validated: August 2026
Performance comparison (1–10 score)
The chart below scores each financing option from 1 (weakest) to 10 (strongest) across six dimensions. All scores use a “higher is better” scale — a score of 10 for Upfront Accessibility means no upfront cost; a score of 10 for Tax Credit Eligibility means full Section 25D access.
Performance scores 1–10 for each financing option
Dimension
Solar Lease
Power Purchase Agreement (PPA)
Buy Outright (Cash or Loan)
Upfront Accessibility
10/10
10/10
2/10
Low Monthly Cost
6/10
8/10
5/10
20-Year Net Savings
3/10
4/10
10/10
Ownership & Equity
1/10
1/10
10/10
Maintenance-Free Score
10/10
10/10
5/10
Tax Credit Access (pre-2026)
1/10
1/10
10/10
Three questions to answer before deciding
Three questions help narrow down the right option for most homeowners. Work through them in order — the answers almost always point toward one path.
Question 1 — Can you access the federal tax credit?
The Section 25D Residential Clean Energy Credit — 30% of installed cost under the Inflation Reduction Act — used to be the single biggest financial variable in this comparison. It expired December 31, 2025, so a system placed in service in 2026 or later gets $0 and this variable drops out of the decision. While it was in force it flowed only to the owner: if your federal tax liability that year was under the credit value ($5,400 on an $18,000 system) you carried it forward or lost part of it, which is why low or zero federal tax brackets — retirees on Social Security, lower-income households, large deductions — often saw the purchase advantage narrow. Lease and PPA buyers forwent it; the provider captured it. Today the ownership question turns on escalators, maintenance, and resale.
Question 2 — Do you have upfront capital or loan access?
A cash purchase delivers the highest 20-year return but requires the full $18,000 out of pocket at signing — the lower $12,600 figure assumed the 30% Section 25D credit, which expired December 31, 2025. A solar loan spreads that cost over 7–25 years but adds interest — typically $5,000–$12,000 total depending on APR. Lease and PPA eliminate the upfront requirement entirely. If your savings or available credit are insufficient for an owned system and your current investments earn above the loan rate, a loan can be competitive. If neither cash nor credit is accessible, lease and PPA remain the practical path to solar without capital.
Question 3 — How long do you plan to stay in the home?
Payback for an owned system (cash or loan) typically runs 7–13 years. If there is a realistic chance of selling within 5–7 years, outright purchase may recover less value than you invested through the sale price premium alone (studies find a 3–4% home value increase on average). Lease and PPA transfer to the buyer — but require buyer credit approval and can add 30–90 days to closing. Buyers with systems under PPAs sometimes renegotiate or buy out the contract to simplify the sale. Discuss with your real estate agent whether your local market views leased-system homes favorably before signing a 20-year agreement.
Homeowners who have upfront capital or clean credit and plan to stay 8+ years should lean toward outright purchase — the 20-year ROI advantage over lease or PPA is $10,000–$20,000 for a typical 6 kW system, and it no longer depends on the federal credit, which expired December 31, 2025. Homeowners who lack liquidity or face uncertainty about their time horizon should compare lease versus PPA terms side by side, focusing on the Year 1 rate, escalator percentage, and early buyout clause in each contract.
Which option is right for your situation?
Solar Lease
Best for:
homeowners with no upfront capital, stable monthly income, and 15+ year stay plans who cannot use the federal tax credit
Fixed monthly payment with no maintenance or upfront cost, but no ownership equity, no tax credit benefit, and a 20-year escalator contract.
Power Purchase Agreement (PPA)
Best for:
homeowners who prefer pay-per-kWh transparency and want production risk shifted to the system owner with no upfront investment
Pay only for electricity generated; no upfront cost; lowest Year 1 rate — but escalator clause and 25-year commitment require careful due diligence.
Buy Outright (Cash or Loan)
Best for:
homeowners with cash or loan access, federal tax liability to absorb the ITC, and a 7+ year time horizon seeking maximum 20-year ROI
Highest 20-year net return; full Section 25D tax credit; equity asset at sale — at the cost of $18,000 upfront or loan payments.
Tax credits, incentives, and the PPA escalator
Federal and state incentives are the most consequential variable in the lease-vs-PPA-vs-buy decision. Understanding ownership requirements is essential before choosing a financing path. Always consult a licensed tax professional to verify current availability and confirm your tax liability is sufficient to absorb the full credit value.
Section 25D Residential Clean Energy Credit — ownership required
Under the Inflation Reduction Act as originally enacted, the Section 25D credit covered 30% of the installed cost of a residential solar system, and was scheduled to run through 2032. It belonged to the system owner — the homeowner under a cash or loan purchase, not the installer or financing company under a lease or PPA — so a lease or PPA signer received no direct benefit from it. Under federal legislation enacted in 2025, Section 25D was terminated for systems placed in service after December 31, 2025, which means the ownership-versus-third-party credit question no longer changes the arithmetic: neither party claims a residential credit on a 2026 installation. Verify current credit status with the IRS and a licensed tax professional before factoring any percentage into your payback estimate.
State incentives, SRECs, and net metering
Many state-level incentives — property tax exemptions, sales tax waivers, and Solar Renewable Energy Certificate (SREC) programs — are available only to system owners. Under a lease or PPA, the third-party owner retains SREC ownership in most contracts unless explicitly negotiated otherwise. Review your lease or PPA contract language carefully and use DSIRE (dsireusa.org) to identify current state programs. Net metering credits flow to the account holder regardless of ownership structure, but the kWh value of those credits is retained by the provider under PPA and lease agreements in most jurisdictions.
PPA agreements typically include an annual rate escalator of 1–3%. At 2.5% per year, a starting rate of $0.10/kWh reaches $0.17/kWh by year 25 — close to today's national average retail rate. If your utility rate also increases at 2–3% annually, the PPA escalator may keep pace. But if utility rates accelerate (e.g., due to grid modernization or policy), the PPA rate becomes less competitive over time. Negotiate the escalator clause carefully before signing; flat-rate PPAs (0% escalator) exist but typically carry a higher starting rate. A flat-rate PPA offers cost certainty; a low-escalator PPA offers a lower entry rate with manageable long-term growth.
Frequently asked questions
Can I switch from a solar lease or PPA to ownership later?
Most lease and PPA agreements include a buyout provision that lets you purchase the system at fair market value at specific intervals — often at year 5, 10, and 15. Fair market value of a 10-year-old solar system is typically $3,000–$7,000 for a 6 kW system, well below the original $18,000 install cost. The Section 25D tax credit was tied to the system's original in-service date, so buying out a leased system never let you claim it retroactively — and since the credit expired December 31, 2025, a buyout today carries no federal credit at all. Confirm buyout terms and pricing schedules before signing any lease or PPA agreement. Consult a licensed tax professional to verify credit rules for your specific situation.
What happens to my solar lease or PPA if I sell my home?
Lease and PPA agreements typically must be transferred to the buyer as a condition of sale. This requires the buyer to qualify creditwise with the financing company — a process that can add 30–90 days to closing and occasionally derail a sale if the buyer declines to assume the contract. Some agreements offer a buyout option at the time of sale, allowing the seller to pay off the remaining obligation and remove the encumbrance from the title. Sellers with owned systems face no such complication — the system is appraised as part of the home and typically adds 3–4% to sale price. If you are within 5–7 years of a likely sale, the transfer complexity of a lease or PPA is a meaningful downside. Discuss with your real estate agent and a financial advisor before signing a 20-year agreement.
Who got the Section 25D federal tax credit in a solar lease or PPA?
The lessor or PPA provider — not the homeowner. Under a third-party-ownership arrangement the financing company owned the system and therefore claimed the Section 25D Residential Clean Energy Credit on its federal return, and the homeowner received none of it directly. Providers factored it into lease and PPA rates, which is why $0-down third-party financing could be offered at all. Under federal legislation enacted in 2025, Section 25D was terminated for systems placed in service after December 31, 2025, so neither party gets a residential credit on a new 2026 installation; watch for pricing that still assumes the provider will capture one. Consult a licensed tax professional before making any financing decision that depends on credit availability.
How does the PPA escalator affect my 25-year total cost?
A 2.5% annual PPA escalator compounds significantly over 25 years. A starting rate of $0.10/kWh reaches $0.18/kWh by year 25 — close to double the starting rate. On 8,500 kWh of annual production, that means monthly payments grow from roughly $71/month in Year 1 to $127/month in Year 25. The total amount paid over 25 years at 2.5% escalator versus a flat rate differs by approximately $6,000–$9,000 for a typical residential system. Whether this is favorable compared to utility rate growth depends on how much your local utility rate rises over the same period. Flat-rate PPAs (0% escalator) exist but typically start 10–20% higher per kWh. Always request both an escalator and flat-rate PPA quote and compare 25-year total cost before signing. The escalator clause is one of the most important and least-read terms in residential solar contracts. The ppa-escalator glossary entry on this site provides additional context.
What is the difference between a lease buyout and continuing the lease?
A lease buyout allows you to purchase the system at a contractually defined price — typically fair market value at the buyout date. Once bought out, you own the system outright: all remaining electricity savings flow directly to you, you are responsible for maintenance, and the system transfers simply with the property at sale. Continuing the lease means escalating monthly payments for the remaining contract term with no change in ownership or benefit structure. Financially, a buyout often makes sense at years 10–15 when the system still has 10–15 years of productive life remaining and the fair market value is low relative to remaining savings. The key variables are the buyout price (request a schedule upfront), the system's remaining production capacity, and your local electricity rate trajectory. A certified solar installer can quote the fair market value of your specific equipment and remaining useful life. A financial advisor can run the net present value comparison between buyout and remaining lease payments.
Run your numbers
The tables above use national averages. For results based on your ZIP code, utility rate, and specific loan terms, use the calculators below.
Solar ROI Calculator
Estimate your solar payback period and 25-year savings for your ZIP code, utility rate, and system size.