The question changed on January 1, 2026. The federal Residential
Clean Energy Credit — the 30% tax credit that underwrote most rooftop
solar math for the past two decades — ended for any expenditure
made after December 31, 2025, eliminated by 2025’s One Big
Beautiful Bill Act. The builder-side 45L efficiency credit followed it,
expiring for homes acquired after June 30, 2026.
So is solar still worth it on a new home in 2026? Sometimes — but the
lazy answer (“yes, there’s a 30% credit”) is gone. Here’s the honest
math.
What Solar Actually Costs
Now
Two things are happening at once, and they point in opposite
directions:
- Hardware keeps getting cheaper. Residential system
pricing fell about 7% year-over-year into early 2026, with panel prices
down more than 20%. EnergySage’s mid-2026 data puts the average
installed cost around $2.60 per watt — roughly
$31,000 for a typical 12 kW system before any
incentives. - The 30% federal discount is gone. EnergySage’s
analysis found payback periods stretch about 43% longer without
the credit — the average US payback is now roughly 9–10
years, versus ~7 with the credit. In strong-sun, high-rate
states it’s better (California ~7 years, Illinois ~6); in
cheap-electricity states it can exceed 20 years and simply doesn’t
pencil.
The industry felt it immediately: analysts forecast the residential
solar market shrinking roughly 21% in 2026, and a major national
installer went bankrupt. That has a practical consequence for you —
installers are hungry, and quotes are negotiable.
Why New Construction Is
the Exception
Here’s the part most 2026 solar coverage misses: the case for solar
on a new build held up much better than the case for retrofits,
for three reasons.
1. Builder-installed solar is dramatically cheaper.
Installing during construction — roof penetrations flashed at roofing
time, conduit run through open walls, one mobilization — runs roughly a
third cheaper than retrofitting the same house later. California
new-construction pricing commonly lands in the $15,000–$22,000 range for
systems that would cost $26,000–$40,000 as retrofits.
2. It rolls into the mortgage. Add $20,000 of solar
to a 30-year mortgage and it costs on the order of $130 a
month. If the system saves more than that on your electric bill
— very plausible where rates are high — you’re cash-flow positive from
day one, no tax credit required. No separate solar loan, no dealer
financing markup (the fees baked into “zero-down” solar loans routinely
added 20–30% to retrofit system prices).
3. Electricity prices are doing the credit’s old
job. Residential rates averaged about 16.8¢/kWh in 2025 and
rose ~7.4% year-over-year into 2026, with some states up ~20%. Every
rate increase shortens solar payback. The credit was a one-time 30%
discount; rate inflation compounds for 25 years.
What’s Left in Incentives
Federal: essentially nothing for a system you own. The remaining
federal subsidy path is third-party ownership — leases
and PPAs, where the installer claims a commercial credit and shares some
savings. That can beat nothing, but read the escalator clauses
carefully; you’re trading long-term value for a smaller bill today.
State and local programs survived and matter more than ever. A few
examples as of mid-2026: New York offers a 25% state tax credit (up to
$5,000) plus NY-Sun rebates; Massachusetts opened SMART 3.0 in January
2026 with 20-year production payments; Illinois Shines SRECs are
commonly worth $10,000+ over 15 years; New Jersey pays $85 per SREC-II
for 15 years (~$10,000 lifetime); Texas and Florida lean on utility
rebates and property-tax exemptions. Check your own state’s programs
before deciding — in incentive-rich states, post-federal solar still
pencils comfortably.
The Net Metering Wildcard
How your utility credits exported power now matters as much as the
install price. California’s shift to “net billing” (NEM 3.0) cut export
credits by roughly 75–85% — from near-retail to a few cents per kWh —
which is why most new California systems now pair with a battery to
consume their own power instead of exporting it. Other states have
trimmed or are reviewing their export rates too.
For a new build, the practical takeaway: ask your utility for
its current export tariff before sizing a system, size closer
to your actual daytime self-consumption if export credits are weak, and
at minimum make the home battery-ready (panel capacity and wall space)
even if you skip the battery now.
A Simple 2026 Decision
Framework
Solar on your new build is likely worth it if most of these are true:
your electric rate is above ~15¢/kWh or rising fast; your state or
utility still offers real incentives; your roof has good unshaded
south/west exposure; the builder’s price is near $2.30–$2.60/watt (get
an outside quote to check the markup); and you’ll own the home 7+ years.
It’s likely not worth it if you’re in a cheap-power state with
no incentives and weak net metering — in that case, spend a fraction of
the money making the house solar-ready instead
(conduit, panel capacity, reserved roof area) and revisit when the
economics improve. We cover exactly what that means in our solar-ready
roof guide.
The Bottom Line
The federal credit is gone and payback is real math now, not a
foregone conclusion. But new construction remains solar’s best case:
build-time installation is the cheapest solar you’ll ever buy, mortgage
financing makes it cash-flow friendly, and rising electricity rates are
quietly rebuilding the incentive the tax code took away. Run the numbers
for your state, your utility, and your roof — and if the answer is “not
yet,” make the house solar-ready and leave the option open.
Figures are as of August 2026 and change frequently. This is
general information, not financial or tax advice.
Sources
- IRS FAQ on 25D/25C/45L termination under Public Law 119-21 —
irs.gov - EnergySage: 2026 solar cost data ($2.60/W); payback without the ITC
— energysage.com - SEIA/Wood Mackenzie Solar Market Insight Q2 2026 — seia.org
- Solar.com / EnergySage state incentive roundups (NY, MA, IL, NJ, TX,
FL) — solar.com - MassCEC: SMART 3.0 program guide — masscec.com
- NEM 3.0 export-rate analysis — ohmsnap.com
- EIA / Utility Dive: 2026 electricity price trends — eia.gov,
utilitydive.com