State incentives are now the main subsidy for homeowners who buy solar with cash or a loan in 2026. The federal residential tax credit (Section 25D) expired December 31, 2025, so the 30% credit cash and loan buyers used to claim is gone. Lease and PPA customers still benefit from Section 48E, the commercial credit, under current law if the project starts construction by July 4, 2026, or is in service by December 31, 2027 — baked into their monthly rate. Either way, what your state offers now decides whether your payback math works.
How the federal change reshapes the state picture
Section 25D, the 30% residential federal credit, expired December 31, 2025. Cash and loan buyers in 2026 cannot claim any federal credit on their return. The payback math has to clear without that 30% backstop.
Section 48E is the commercial-side credit, also 30%, and it remains available under current law if the project starts construction by July 4, 2026, or is in service by December 31, 2027. Lease and PPA customers benefit indirectly: the third-party owner claims the credit and passes the savings through as a lower monthly rate.
That split is the biggest shift in residential solar finance this decade. Cash and loan buyers now depend on state incentives because those programs are their only meaningful subsidy. Lease and PPA buyers stack state incentives on top of the 48E pass-through, often improving first-year value over what was possible in 2025.
The size of the state-level gap varies enormously by zip code. New York's main lever is now its 25% state credit up to $5,000, since the NY-Sun standard-income rebate blocks have largely closed. Massachusetts pays system owners monthly for 20 years. Texas offers a property tax exemption and not much else. Where you sit on that spectrum should drive your financing decision.
The nine states where the math changes the most
New York leads on stacked incentives, though the upfront rebate has tightened. The NY-Sun Megawatt Block program pays a declining per-watt rebate that, for standard-income systems, has been fully subscribed in the Con Edison and Upstate regions, so most 2026 buyers rely on the state credit, which returns 25% of cost up to $5,000. Income-qualified households can still receive about $0.80 per watt. Check the NYSERDA dashboard for current block status in your region.
New Jersey runs no state credit but stacks a property tax exemption, sales tax exemption, and the Successor Solar Incentive (SuSI) program, which pays SREC-II credits worth about $700 to $850 a year on a typical 8 kW system.
Massachusetts pays system owners monthly through the SMART program. Under SMART 3.0 the residential base rate is $0.03 per kWh produced, or $0.06 for income-qualified households, fixed for 20 years, with a $0.04 per kWh adder if you pair a battery. A 10 kW system producing 11,000 kWh a year earns about $330 a year at the base rate, or closer to $770 a year with the storage adder, plus a $1,000 state credit at install.
Illinois combines the Shines block rebate ($0.60–$1.00 per watt), SREC sales (typically $30–$100 per credit, about 11 per year for a 10 kW system), and a property tax freeze.
Maryland pays a flat $1,000 Residential Clean Energy Grant, plus a property tax exemption. Arizona caps its 25% state credit at $1,000, exempts equipment from sales tax, and excludes the system from property tax assessments.
California offers no state credit but excludes solar from property tax under Proposition 13. The Self-Generation Incentive Program rebates roughly $0.15 to $0.20 per Wh of paired battery storage for most homeowners, more for income-qualified or fire-zone households, though the general-market budget is often waitlisted. NEM 3.0 cut export credits sharply, so batteries are now part of nearly every California design.
Florida and Texas have no state income tax and no state credit, but both fully exempt residential solar from property tax. Florida also exempts equipment from sales tax.
What each incentive type actually does for your bottom line
A state income tax credit reduces what you owe your state in the year your system turns on. Caps run from $1,000 in Massachusetts, Maryland, and Arizona to $5,000 in New York. You need enough state tax liability to absorb the full credit, and most states block lease and PPA customers from claiming it.
A rebate is cash off the price, applied by your installer before you sign. NY-Sun and Illinois Shines both pay this way, in blocks of $0.15 to $1.00 per watt that fill as applications come in.
A property tax exemption stops the assessor from adding your system's value to your home's taxable basis. On a $30,000 system in a 1% jurisdiction, that runs about $300 a year — roughly $7,500 over 25 years.
A sales tax exemption strips the state portion of sales tax off your equipment purchase at signing. In a 6% state, that's $1,800 off a $30,000 system.
SRECs are tradable production credits. A 10 kW system in New Jersey or Illinois may earn $900 to $1,200 a year, paid ongoing rather than upfront. Prices float with the market, and the income is taxable federally.
Net metering credits show up on your utility bill when your system exports more than you use. Some utilities pay retail rate, others wholesale, others almost nothing. Net metering is set by utility tariff, not state law, but it shapes long-run savings as much as any program on this list.
Stacking 48E with state incentives if you lease or sign a PPA
The cleanest 2026 financing setup combines the Section 48E pass-through with whatever state incentives apply to your address. Cash and loan buyers see no 48E benefit, but they still capture state credits, exemptions, and REC payments. Lease and PPA buyers can capture both.
Here is how the stack plays out for a 10 kW lease in Massachusetts. The company that owns the system claims Section 48E and prices the lease accordingly, so your monthly payment lands near $90 instead of the roughly $120 it would have been in 2025. You also enroll in the SMART program and earn about $330 a year at the SMART 3.0 base rate, more if you pair a battery, paid directly to you regardless of who owns the system. Sales tax on equipment is waived at install. State credit rules for leased systems vary, so confirm eligibility before you sign.
The same logic applies in New Jersey with SuSI credits, in Illinois with SRECs, and in California with SGIP battery rebates. Owners do not get the 48E pass-through, but the state side of the stack is still available — sometimes worth more than the federal credit was in 2025.
How to verify what your state offers right now
State programs change every quarter. Funding blocks fill, caps reset, and rules around lease and PPA eligibility shift without much notice. Start every conversation with current data, not last year's article.
The Database of State Incentives for Renewables and Efficiency at dsireusa.org is the authoritative source. North Carolina State University maintains it, and filtering by state plus technology returns every active federal, state, local, and utility program with current amounts and deadlines.
Cross-check DSIRE against what your installer quotes. Reputable installers build state incentives into proposals correctly, but rebate blocks can close between your fit call and your contract date.
Two questions are worth asking before you sign. Which block am I in for NY-Sun or Illinois Shines, and what per-watt rate is locked into my proposal. And does my financing method qualify for the state credit, or only ownership.
Run the numbers in the Solrova Solar Design Studio with your address and utility — it pulls current state programs, applies the correct 48E pass-through for lease and PPA, and shows which financing path actually wins in your zip code.