Solar Payback Period by State 2026 (Without the Federal Tax Credit)
7 kW system at $3.00/W ($21,000) before any incentives. No ITC applied. Payback = system cost ÷ annual electricity savings at 2026 EIA rates.
Fastest payback
7.1 yrs
Louisiana (no ITC)
With 30% ITC
~5 yrs
Best-case states
Avg US payback
10.2 yrs
No ITC baseline
System lifespan
25-30 yrs
Net profit window
Why This Page Shows No Federal Tax Credit
The 30% ITC is real and significant, but it only applies if you owe federal income tax. Add it back yourself once you know your situation.
ITC requires tax liability
The federal Investment Tax Credit is a credit against your federal income tax owed. If your tax liability is less than 30% of system cost, you cannot use the full credit in year one (carryforward is allowed). Retirees and low-income households may see little benefit.
Renters cannot claim it
Only system owners can claim the ITC. If you lease solar panels or sign a PPA (Power Purchase Agreement), the installer claims the credit, not you. Ownership is required.
Future of the ITC is uncertain
The ITC is currently set at 30% through 2032, then steps down. Legislative changes could alter the credit. This page shows the no-incentive baseline so you can model different scenarios.
Quick ITC adjustment
If you do qualify for the 30% ITC: multiply the payback years below by 0.70 to get your effective payback. A 10.2-year baseline becomes ~7.1 years with full ITC. Louisiana's 7.1 years becomes ~5.0 years.
Solar Payback by State (No ITC, 2026 Rates)
7 kW system, $3.00/W installed cost. Payback years sorted fastest to slowest.
| State | Rate (c/kWh) | Sun hrs/day | Net Metering | Payback (no ITC) |
|---|---|---|---|---|
| Hawaii 35% state tax credit (capped $5,000) | 41.55 | 5.6 | Partial NEM | 4.9 yrs |
| California | 32.47 | 5.8 | NEM 3.0 | 8.2 yrs |
| Connecticut | 26.87 | 4.1 | Full NEM | 9.3 yrs |
| Massachusetts | 27.23 | 4.0 | Full NEM | 9.4 yrs |
| New York | 23.45 | 4.2 | Full NEM | 10.4 yrs |
| New Mexico | 13.89 | 6.8 | Full NEM | 10.9 yrs |
| Rhode Island | 22.45 | 4.1 | Full NEM | 11.2 yrs |
| New Hampshire None above federal | 22.78 | 4.0 | Full NEM | 11.3 yrs |
| New Jersey | 20.45 | 4.4 | Full NEM | 11.4 yrs |
| Colorado | 15.67 | 5.7 | Full NEM | 11.5 yrs |
| Arizona | 14.61 | 6.5 | Partial NEM | 12.0 yrs |
| Vermont | 21.98 | 3.8 | Full NEM | 12.3 yrs |
| Nevada | 14.23 | 6.4 | Partial NEM | 12.5 yrs |
| Illinois Illinois Shines SREC program | 17.87 | 4.5 | Full NEM | 12.8 yrs |
| Michigan | 18.34 | 4.2 | Full NEM | 13.3 yrs |
| Florida | 13.97 | 5.5 | Full NEM | 13.4 yrs |
| Maryland | 16.34 | 4.5 | Full NEM | 14.0 yrs |
| Pennsylvania | 16.78 | 4.3 | Full NEM | 14.2 yrs |
| Georgia | 13.78 | 5.2 | Full NEM | 14.3 yrs |
| Minnesota | 15.87 | 4.5 | Full NEM | 14.4 yrs |
| Oklahoma | 11.89 | 5.7 | Full NEM | 15.2 yrs |
| North Carolina | 13.23 | 5.1 | Full NEM | 15.2 yrs |
| Alabama | 14.14 | 5.2 | Partial NEM | 15.5 yrs |
| Ohio | 14.98 | 4.4 | Full NEM | 15.6 yrs |
| Louisiana 50% state tax credit (capped $12,500) | 11.68 | 5.5 | Full NEM | 16.0 yrs |
| Mississippi | 11.98 | 5.3 | Full NEM | 16.2 yrs |
| Oregon | 13.45 | 4.2 | Full NEM | 18.2 yrs |
| Texas | 14.42 | 5.6 | No NEM | 18.6 yrs |
| Washington | 12.87 | 3.8 | Full NEM | 21.0 yrs |
Assumptions: 7 kW system, $3.00/W installed, 80% efficiency, 60% self-consumption, 40% grid export at NEM rate. Production = sun hours × 365 × 7 × 0.80. No state incentives included unless noted.
The Payback Math, Explained
Step 1: System cost
7 kW × $3.00/W = $21,000
National avg installed price, Q1 2026 (NREL)
Step 2: Annual production
5.0 hr/day × 365 days × 7 kW × 0.80
= 10,220 kWh/year
US average peak sun hours; efficiency includes inverter + wiring losses
Step 3: Annual savings
60% self-used: 6,132 kWh × $0.1765 = $1,082
40% exported: 4,088 kWh × $0.1765 = $722
Annual savings = $1,804
Full NEM at US avg rate; export savings drop with partial NEM
Step 4: Payback
$21,000 ÷ $1,804 =
11.6 years
US average (no ITC). With 30% ITC: ~8.1 years.
What changes payback the most
Net metering policy
High impactFull NEM vs. NEM 3.0 (5c/kWh export) can add 3-5 years to payback. Check your state's current policy before signing.
Electricity rate
High impactEvery 1c/kWh higher rate cuts payback by ~6 months at US avg production. Hawaii (41c) vs. Louisiana (11c) creates a 4+ year gap in baseline payback.
Peak sun hours
High impactArizona (6.5 hrs/day) produces 71% more electricity than Vermont (3.8 hrs/day) from the same panels. Sun hours dominate production math.
System cost
Medium impactInstaller quotes vary $2.50-$3.80/W. Getting 3 quotes can reduce your cost by $5,000-$8,000 on a 7 kW system. Negotiate.
Self-consumption ratio
Medium impactIf you use more electricity during daylight (EVs charging, heat pumps running), your self-consumption goes up and export goes down. In NEM 3.0 states, higher self-consumption is critical.
Rate escalation
Medium impactRates have risen 4.1% per year on average since 2020. Future rate increases are not included here (conservative), but they accelerate real payback.
Net Metering Status Matters More Than Rate
California has the highest rates in the continental US (32c/kWh) but NEM 3.0 dropped export credits to ~5c/kWh, making solar payback 10+ years in many cases. Louisiana has a third the rate but full retail NEM and more sun hours.
Full retail NEM states (fastest payback)
You get credited at the same rate you pay. Excess exports have full value. These states offer the most straightforward solar economics.
MassachusettsNew YorkNew JerseyColoradoFloridaLouisianaMississippiGeorgiaNorth CarolinaOhioMichiganMinnesotaPennsylvaniaOregonWashingtonMaryland
Reduced or no NEM (caution)
Export credits are below retail rate or don't exist. Solar still makes sense, but self-consumption strategy (EVs, batteries) matters much more.
California (NEM 3.0 ~5c)Nevada (~75% retail)Arizona (~9.4c/kWh)Texas (Utility-by-utility)Alabama (Utility-set rates)Hawaii (CGS+ 8c/kWh)
Frequently Asked Questions
How is the solar payback period calculated here?+
Payback period = system cost ÷ annual electricity savings. System cost uses $3.00/W installed for a 7 kW system ($21,000). Annual savings = state residential rate × estimated annual kWh production (state-adjusted for sun hours). No federal ITC, no state incentives, no depreciation are applied unless noted.
Why are we not including the federal solar tax credit?+
The federal Investment Tax Credit (ITC) currently provides a 30% credit on system cost, reducing a $21,000 system to roughly $14,700 effective cost and slashing payback by about 4-5 years. However, the credit requires federal income tax liability to use it, does not apply to renters, and its future past 2032 is uncertain. This page shows the baseline no-incentive case so you can layer on applicable incentives yourself.
Does net metering affect the payback period?+
Significantly. States with full retail-rate net metering (you sell excess power back at the same rate you buy it) shorten payback by 15-25%. States that have reduced net metering to avoided-cost rates (e.g., California's NEM 3.0 at ~5c/kWh export) lengthen payback substantially. California's NEM 3.0 transition is why CA payback lengthened to 10+ years despite high rates.
What system size does this assume?+
7 kW DC installed capacity at $3.00/W all-in cost = $21,000 before incentives. This covers approximately 900 kWh/month in average sun states. High-usage states (TX, FL, AZ) or low-sun states (AK, WA, VT) will need adjustment. Use the sizing guide: your monthly kWh usage ÷ state peak sun hours ÷ 30 days ÷ 0.80 efficiency = kW needed.
Which states have the fastest solar payback right now?+
Without the federal ITC: Louisiana (7.1 yrs), Texas (7.4 yrs), Oklahoma (7.6 yrs), Alabama (7.9 yrs), and Mississippi (8.0 yrs) have the fastest payback due to high sun hours combined with moderate-to-high rates. Hawaii and Massachusetts show long payback despite high rates because of low sun hours or NEM changes.