Best US states for solar payback in 2026: 50-state ranking, post tax credit.

The 30 % federal credit is gone, but solar still pencils in most of the country. Payback now ranges from 5.8 years (Hawaii) to 22.4 years (Idaho). Here is the full ranking, with the formula behind it and the three numbers that decide everything.

The model in one paragraph

For every state, we run an 8 kW grid-tied system at $2.85 / W installed (EnergySage Q1 2026 national median). We assume no federal credit (eliminated July 2025) but apply any standing state rebate from DSIRE. Annual production is NREL PVWatts state average. Annual savings = production × retail rate, inflated 3.5 %/yr, with 0.5 %/yr panel degradation. Payback is the fractional year cumulative savings cross the net system cost.

net_cost = (8 × 1000 × 2.85) − state_rebate
year_savings[y] = (8 × prod) × (1 − 0.005)^y × rate × (1 + 0.035)^y
payback = min y where Σ year_savings[0..y] ≥ net_cost

2026 ranking — all 50 states

Rate source: EIA "Average Price of Electricity to Ultimate Customers" (Form EIA-861, Feb 2026 release). Production source: NREL PVWatts v8, default tilt/orientation. State rebates pulled from DSIRE (May 12, 2026 snapshot) — see breakdown below.

State rebates still standing in 2026

These are the programs that survived the federal cut, applied in the ranking above. If you live in one of these states, the payback shrinks further by 1-3 years.

• Massachusetts SMART: performance-based incentive paid over 10 years; effective ~$0.06/kWh credit on top of net metering. The reason MA is #2 on the ranking.
• New York NY-Sun: $200-400/kW block-grant declining incentive. Up to $1,600 on an 8 kW system depending on region.
• Maine Efficiency Maine PV: $0.50/W for low-income households (Q1 2026 reset).
• California SGIP (battery only): $1,000/kWh for medical-baseline and high-fire-risk customers — affects payback only if a battery is included.
• Illinois Solar for All: covers up to 100 % of system cost for qualifying low-income; not in the ranking baseline.
• Connecticut Solar Investment Program: $0.46/W performance incentive over 5 years.
• New Jersey TREC / SREC-II: tradeable certificate market; effective ~$0.085/kWh in 2026.
• Oregon Solar + Storage Rebate: $300/kW + $300/kWh battery, cumulative cap.

To check your own state and utility, the canonical source is DSIRE. The numbers change monthly — what's on the ranking is the May 12, 2026 snapshot.

The three numbers that decide everything

If you only remember three things from this article:

1. Your retail electricity rate ($/kWh). This is the lever. Doubling your rate cuts payback nearly in half.
2. Your annual production per kW. NREL PVWatts gives a state default; your actual roof can be ±25 % depending on tilt, orientation and shading.
3. Your installed cost ($/W). The 2026 national median is $2.85/W. Below $2.40 is excellent (DIY-territory); above $3.20 you're paying a national-brand premium.

Why the bottom 5 are bad: cheap electricity

Idaho, Washington, Nebraska, Utah and North Dakota all share one feature: cheap retail electricity driven by hydroelectric infrastructure (Pacific Northwest), coal (UT, ND, NE) or public-power utilities. With retail rates at $0.11-0.12/kWh, every kWh you self-generate is only worth half what it is in the Northeast. The math simply does not pencil for residential PV at these levels — even with stellar insolation in Utah.

What does work in these states: community solar subscription (no upfront cost, ~10 % savings on the utility bill) or pairing solar with a heat pump to offset oil/propane heating where the BTU economics matter more than the kWh.

Why the top 5 win: rates over insolation

Hawaii's payback (5.8 years) isn't driven by sun — its 1,480 kWh/kW is middle-of-pack. It's driven by $0.424/kWh retail electricity, which makes every panel-generated kWh worth 3× what it is in the Midwest. Massachusetts (#2) gets 1,280 kWh/kW (below the national average) but combines $0.33/kWh retail with the SMART performance incentive that pays ~$0.06/kWh for 10 years.

Frequently asked questions

Sources: EIA Form EIA-861 (Feb 2026 release), NREL PVWatts v8, DSIRE state-incentive database (May 12, 2026), EnergySage Solar Marketplace pricing (Q1 2026), LBNL Tracking the Sun 2025 edition. Last reviewed May 12, 2026.