Solar Tax Credit 2026: What Changed for Homeowners
For new US residential solar projects in 2026, do not assume the old 30 percent federal Residential Clean Energy Credit. Public Law 119-21 ended the Section 25D credit for qualified expenditures made after December 31, 2025. That changes payback, IRR, and how homeowners should compare quotes.
Last updated: July 2026. This page is educational, not tax advice. Confirm your eligibility with the IRS OBBB FAQ, IRS residential clean energy credit page, and a qualified tax professional.
The short answer for 2026
The federal residential solar credit that many homeowners knew as the 30 percent solar tax credit no longer applies to Section 25D expenditures made after December 31, 2025. If you are modeling a system purchased or completed in 2026, use the full turnkey cost unless you have a confirmed state, local, utility, or business incentive.
| Project situation | Federal residential 25D assumption | Modeling action |
|---|---|---|
| New residential solar expenditure after Dec. 31, 2025 | Assume no 30% federal 25D credit | Enter gross turnkey cost minus only confirmed non-federal incentives |
| Potential 2025 qualifying expenditure | May depend on timing and documentation | Keep invoices, check IRS rules, and ask a tax professional |
| State rebate or utility incentive | May still apply | Subtract only incentives you can verify for your address and customer class |
| Commercial or business-owned solar | Different tax sections may apply | Use separate commercial tax guidance; do not rely on this residential page |
Why this matters for payback
A tax credit reduces the net system cost. Removing it can add several years to simple payback and push IRR down sharply. The energy savings formula is unchanged, but the upfront investment is higher.
| Example 6 kWp system | Net cost | First-year net savings | Simple payback |
|---|---|---|---|
| Old 30% federal credit scenario | 11,760 USD | 1,800 USD | 6.5 years |
| No federal credit scenario | 16,800 USD | 1,800 USD | 9.3 years |
| No federal credit + 1,000 USD local rebate | 15,800 USD | 1,800 USD | 8.8 years |
The exact impact depends on local power prices, self-consumption, export credits, and installed cost. In high-rate markets solar may still work without the federal credit. In low-rate markets, the same quote may no longer clear a reasonable return threshold.
How to model incentives in PV Yield
- Start with the full turnkey quote: panels, inverter, racking, labor, permitting, electrical work, and installer margin.
- Do not subtract the old 30 percent federal residential credit for a new 2026 residential expenditure unless your tax advisor confirms eligibility.
- Subtract only confirmed state rebates, utility incentives, sales-tax exemptions, or property-tax benefits that apply to your address.
- Enter the resulting net cost in PV Yield's solar ROI calculator.
- Run two scenarios: one with the incentive and one without it. Use the worse case for your investment decision.
State and local incentives still matter
The federal residential change does not automatically erase state and utility programs. Some states still offer property-tax exemptions, sales-tax exemptions, battery rebates, utility rebates, or production incentives. Program values change often, so verify before signing.
| Incentive type | How it helps | What to verify |
|---|---|---|
| Upfront rebate | Reduces installed cost immediately | Funding availability, income limits, utility territory |
| Property-tax exemption | Prevents added system value from raising property tax | Local assessor rules and exemption duration |
| Sales-tax exemption | Lowers purchase price | Equipment and labor eligibility |
| Battery rebate | Improves economics where export value is low | Backup requirements, battery size limits, discharge rules |
| Production incentive | Pays per kWh generated or exported | Contract term, rate step-down, metering requirements |
Use DSIRE and your utility's current tariff documents to confirm the values. Do not rely only on sales proposals.
What changed in quote review
Before the cutoff, many proposals showed a headline cost, then a lower "net cost after 30 percent federal credit." For 2026 residential projects, that net-cost line may be wrong unless the proposal clearly explains why the system still qualifies. Ask installers to show both the gross price and every incentive separately.
- Ask whether the quoted payback assumes a federal residential credit.
- Ask which tax year and tax form the installer assumes.
- Ask for written incentive eligibility, not only a sales-screen estimate.
- Ask for a no-incentive payback case.
- Compare quotes using turnkey cost per watt before incentives.
Does this mean solar is not worth it?
No. It means the model must be stricter. Solar can still be attractive where retail electricity prices are high, daytime self-consumption is strong, export crediting is fair, and installed cost per watt is competitive. But the federal-credit cushion is gone for new residential expenditures after 2025, so weak projects are easier to expose.
For a broader decision framework, read are solar panels worth it in 2026. For cost inputs, see solar panel cost per watt. For annual bill impact, use the solar panel savings calculator guide.
Common mistakes
- Using an outdated calculator. Many calculators still subtract 30 percent automatically. Turn that off for a new 2026 residential project unless eligibility is confirmed.
- Mixing residential and commercial rules. Business-owned systems use different provisions and should be modeled separately.
- Counting tax savings as annual bill savings. Incentives lower net cost; they do not change how many kWh the system produces.
- Ignoring export tariff changes. A missing federal credit plus a low export tariff can stretch payback quickly.
- Accepting "average state incentive" numbers. Programs can vary by utility, income, system size, and available funding.
PV Yield lets you model this conservatively: enter your real net cost after verified incentives, then compare payback, IRR, NPV, and LCOE. If the project only works with an incentive you cannot document, treat the result as too optimistic.
Frequently asked questions
Is there a federal residential solar tax credit in 2026?
Under Public Law 119-21, the Residential Clean Energy Credit under Section 25D does not apply to expenditures made after December 31, 2025. Do not model a new 2026 residential system with the old 30 percent federal credit unless a qualified tax advisor confirms eligibility.
Can I still claim a solar credit for a 2025 installation?
If the qualifying expenditure was made before the 2025 cutoff and the system otherwise meets the rules, you may still be able to claim the credit on the relevant return. Keep invoices and consult a tax professional.
Do state solar incentives still exist after the federal change?
Yes. State rebates, local property-tax exemptions, utility programs, and battery incentives can still reduce net cost. Check DSIRE and the utility program rules before modeling payback.
How should I model a missing federal tax credit?
Enter the full turnkey system cost minus only confirmed state, local, or utility incentives. Then compare payback and IRR against the old-credit scenario to understand the policy impact.