Solar economics in 2026 — what changed and what it means for your roof

The federal residential solar tax credit — Section 25D of the Internal Revenue Code, the one that paid back 30% of system cost — ended on December 31, 2025. There is no transitional rule. A system contracted in 2025 but installed in 2026 does not earn the credit. The Section 48E commercial credit, which lease and PPA providers capture, remains available through 2027 with construction-begin and placed-in-service safe harbors. Those two facts have inverted residential solar economics that held since 2022. This is the most useful one-page explanation of what the One Big Beautiful Bill Act actually did to your roof.

By The Solar Brief Editorial Team  ·  Updated May 2026  ·  Sources verified against IRS Form 5695, IRS OBBBA Modifications FAQ, DSIRE, and SEIA

The change in one paragraph

The Inflation Reduction Act of 2022 set the residential Investment Tax Credit at 30% through 2032, with a planned step-down to 26% in 2033 and 22% in 2034 — making solar economics roughly stable for the rest of the decade (DSIRE Federal Residential Renewable Energy Tax Credit). The One Big Beautiful Bill Act, Public Law 119-21, signed July 4, 2025, accelerated that timeline by approximately seven years and terminated §25D entirely for systems placed in service after December 31, 2025 (IRS OBBBA Modifications FAQ). There is no phase-down, no partial credit, no transitional rule for systems contracted in 2025 but installed in 2026. The credit is gone for cash and loan buyers in 2026.

The §48E commercial Investment Tax Credit, which third-party owners (leasing companies and PPA providers) claim on systems they own, remains available — but with its own sunset. Construction must begin by July 4, 2026 OR the system must be placed in service by December 31, 2027 (SEIA — Clean Energy Provisions in the One Big Beautiful Bill). After that window closes, the federal lever for lease and PPA economics also disappears unless extended.

What this changes for cash and loan buyers

For homeowners buying solar with cash or a loan, the math is straightforward and uncomfortable. A typical 8 kW panels-only system that previously netted roughly $16,800 after the 30% federal credit on a $24,000 list price now costs the homeowner the full $24,000 net. Annual production at average US residential rates of about $0.16 per kWh and typical 8 kW production of around 12,000 kWh per year generates roughly $1,920 of annual savings — extending payback from approximately 9 years to approximately 12-13 years on the same system (production assumptions per NREL PVWatts; rate per EIA Electric Power Monthly).

The shift is not uniform across states. Where retail electricity rates are high and state-level incentives are strong (New Jersey, Massachusetts, parts of California with the SGIP battery rebate), the federal-credit loss is partially absorbed by what's already in place. Where retail rates are low and state incentives are thin (Texas, Nevada, parts of Arizona), payback stretches to 14-16 years on a cash purchase — uncomfortably close to or past the typical inverter replacement cycle of 12-15 years.

What this changes for lease and PPA buyers

The §48E commercial credit applies to systems owned by third parties. When a leasing company (Sunrun, Sunnova, Tesla in some markets) installs panels on your roof under a lease or a power purchase agreement, the leasing company captures the credit. Through the end of 2027 — with construction-begin and placed-in-service safe harbors — the better lease providers pass some of that credit through to the homeowner as lower per-kWh rates (SEIA — Solar Power Purchase Agreements).

This inverts a hierarchy that held for the better part of two decades. Pre-OBBBA, cash > loan > lease > PPA was a near-universal rule because cash and loan buyers captured the full 30% federal credit and lease and PPA buyers gave it up. After the §25D sunset, for many mid-bill households (typically $150-$250 per month), a lease through 2027 may produce lower lifetime cost than cash. The right answer depends on bill size, state, and ownership philosophy in a way it didn't before.

Three states, three pictures

The same 8 kW panels-only system, three different states, comparing pre-OBBBA cash payback to 2026 cash payback:

California (NEM 3.0, average residential rate $0.32-0.48 per kWh)

A panels-plus-battery system has been the only configuration that pencilled under California's NEM 3.0 export rates since April 2023. With the federal credit gone, cash payback on a typical $35,000 panels-plus-battery installation stretches from approximately 10 years to approximately 14 years. California lease providers are aggressively passing through §48E savings — effective payback via lease falls to roughly 7-9 years through 2027. For most new California installs in 2026, the lease pivot is genuinely worth a look unless the homeowner is set on ownership.

Texas (deregulated retail, $0.11-0.16 per kWh by REP)

Texas has no statewide net metering and no state income tax credit. Pre-OBBBA cash payback on a typical panels-only system was approximately 9 years. In 2026 it stretches to approximately 13-16 years depending on which Retail Electricity Provider buyback plan the homeowner is on. Lease and PPA may pencil meaningfully better through 2027 — the §48E passthrough partially compensates for Texas's thin incentive stack.

New Jersey (full retail net metering + 15-year SuSI per-kWh payments)

New Jersey remains the best Northeast economy in 2026 because the Successor Solar Incentive (SuSI) program produces predictable per-kWh payments for 15 years that partially absorb the lost federal credit. Pre-OBBBA cash payback was approximately 7 years. 2026 cash payback is approximately 9-11 years. Cash still wins comfortably for owner-minded buyers — the SuSI stack is the strongest state-level federal-credit absorber in the country.

A seven-state comparison

For premium-suburb households with bills in the $200-400/month range, here are typical 2026 cash paybacks across the seven states with strong installer ecosystems:

State	Retail rate	Net metering	2026 cash payback	Lease / PPA option
New Jersey	$0.18-0.22	Full retail + SuSI	9-11 years	Available; cash usually still wins
Massachusetts	$0.30-0.38	Full retail + SMART	9-12 years	Available; cash usually still wins
California	$0.32-0.48	NEM 3.0 (degraded export)	12-16 years (battery req'd)	Strongly preferred through 2027
Arizona	$0.13-0.17	Limited (export < retail)	11-14 years	Worth a hard look through 2027
Nevada	$0.13-0.17	Tiered (~75% of retail)	12-15 years	Worth strong consideration
Florida	$0.13-0.17	Full retail (preserved)	12-15 years	Available; comparable to cash
Texas	$0.11-0.16	None statewide	12-16 years	Often pencils better through 2027

State retail rates from EIA Electric Power Monthly, 2026 edition. Net-metering and state incentive programs (SuSI, SMART, SGIP, AZ residential credit) per state public utility commission documentation accessed via DSIRE in May 2026. Payback ranges assume an 8 kW panels-only system (or panels + 13.5 kWh battery in California) on a south- or west-facing unshaded roof for a household at the midpoint of the bill range.

Who solar still pays back for in 2026

The 2027 calendar fact

The single most important timing detail in 2026 residential solar is the §48E sunset on December 31, 2027 (26 U.S.C. §48E as amended by OBBBA). After that date — absent legislative extension — even the lease and PPA federal lever closes. Projects that begin construction by July 4, 2026 still qualify under the construction-begin safe harbor (Arnold & Porter — From IRA to OBBBA). Practically, this means three things:

First, homeowners considering a lease in 2026 have roughly an 18-month window to lock in the §48E-driven pricing before it disappears. Second, lease providers are likely to ramp marketing aggressively in late 2026 to capture demand before the safe-harbor cutoff — expect "now or never" framing in installer pitches, some of which will be honest and some of which will be pressure. Third, 2028 is, on current law, a state-incentive-only world for residential solar.

Whether Congress extends §48E in time is the open political question. As of May 2026 there is no active legislative effort to do so. The honest read: don't bank on extension. If a lease or PPA is the right move for your household, it's the right move now or in the next eighteen months — not in 2028.

What we recommend

For most homeowners, the post-§25D residential solar decision in 2026 looks like this:

• Read your roof. South or west exposure, no severe shading, decent structural condition, bill above approximately $150 per month.
• Read your state. High retail rate plus a strong state incentive stack (NJ, MA, CA with battery) tilts toward cash purchase. Low retail rate plus a thin state stack (TX, NV, AZ) tilts toward lease.
• Read your finances. Owner-minded buyer with the cash to put down plus a bill above $250 is a cash-purchase candidate. The rest should look at lease or wait.
• Get three quotes. Pricing variance between installers in the same metro is routinely 25-40%.
• Verify the workmanship warranty. A 10-year minimum is the new floor. Install quality matters more when payback is longer — there's less margin for mid-life problems.

The brand promise here matters: The Solar Brief is an information and matchmaking service. We don't install panels, we don't earn commission per closed deal, and we'll tell you honestly if your roof isn't a fit. We'd rather you skip than be sold a system that doesn't pay back.