The Inflation Reduction Act (IRA) of 2022 is the most significant US solar legislation in a generation. It extended the Investment Tax Credit (ITC) at 30% through 2032, restructured commercial credits with bonus provisions, and created new tax credit transfer mechanisms that fundamentally changed how large solar projects are financed.
For solar installers and developers, the IRA changed two things that matter most: the certainty of the 30% rate (no more annual cliffs) and the availability of bonus credits that can push commercial projects to 40–50% ITC.
IRA Solar Credit Summary
Residential (Section 25D): 30% ITC, no size cap, no income limit, through 2032. Commercial (Section 48E): 30% base ITC + up to 20% in bonus credits (domestic content + energy community), through 2032. Battery storage with solar: qualifies for the same 30% ITC as the solar system.
Section 25D: Residential Clean Energy Credit
Section 25D provides homeowners with a 30% tax credit for qualifying residential clean energy installations.
What Qualifies
| System Component | Qualifies for ITC? |
|---|---|
| Solar PV modules | Yes |
| Inverter | Yes |
| Racking and mounting | Yes |
| Electrical wiring (solar-specific) | Yes |
| Permits and inspection fees | Yes |
| Battery storage (installed with solar) | Yes |
| Battery storage added to existing solar | Yes (since IRA 2022) |
| Solar thermal water heating | Yes |
| Roofing replaced to accommodate solar | Partial (structural portion only) |
| EV charger | No (separate credit under Section 30C) |
Eligibility Rules
- Residence requirement: Primary or secondary US residence (not rental property for residential credit)
- Ownership requirement: Taxpayer must own the system — leased systems do not qualify for the homeowner’s ITC (the leasing company claims it instead)
- New equipment only: Used solar equipment does not qualify
- Placed-in-service requirement: System must be operational and connected in the tax year claimed
No Income Limit, No System Size Limit
Unlike some other tax credits, Section 25D has:
- No income cap — available to all income levels
- No system size limit — a $200,000 commercial-scale residential system gets 30% ITC just like a $15,000 residential system
- No cap on total credit amount
Non-Refundable + Carryforward
Section 25D is a non-refundable credit — it can reduce a taxpayer’s federal tax liability to zero, but does not generate a refund if the credit exceeds the tax liability. However, unused credit carries forward to future tax years for Section 25D.
Example:
- Solar system cost: $25,000
- Section 25D credit: $7,500 (30%)
- Tax liability for the installation year: $5,000
- Credit applied this year: $5,000 (reduces liability to $0)
- Remaining credit carryforward: $2,500 (available in future years)
Leased Systems: Who Gets the ITC
For leased solar systems (solar lease or PPA), the leasing company claims the ITC, not the homeowner. This is why leased solar can be offered at zero upfront cost — the leasing company finances the installation, claims the ITC as a financial return, and charges the homeowner a monthly payment. Owned systems allow the homeowner to capture the ITC directly.
Section 48E: Commercial Clean Electricity Investment Credit
Section 48E applies to commercial, utility-scale, and community solar projects. It replaced the prior Section 48 credit with a technology-neutral framework tied to zero-carbon generation.
Base Rate: 30% (With Prevailing Wage)
The 30% base rate applies to commercial solar when prevailing wage and apprenticeship requirements are met for projects above 1 MW AC. For projects 1 MW AC and below, or for projects that meet the prevailing wage/apprenticeship requirements, the 30% rate applies automatically.
For projects above 1 MW AC that fail to meet prevailing wage requirements:
- ITC drops to 6% (the “bonus” base rate without compliance)
- The prevailing wage reduction is absolute — there is no cure after the fact
Bonus Credits: Stacking to 50%
| Bonus Credit | Requirement | Additional ITC |
|---|---|---|
| Domestic Content Bonus | 40% of manufactured components + 100% of structural steel/iron must be US-made | +10% |
| Energy Community Bonus | Project in qualifying census tract | +10% |
| Low-Income Community (Residential) | In low-income community or on Tribal land | +10% (special allocation) |
Maximum stacking (base + domestic content + energy community): 50% ITC
Domestic Content: 40% Threshold Is Rising
The IRA’s domestic content requirement starts at 40% of manufactured component cost in 2026 and increases over time. By 2027, it rises to 45%, and continues stepping up to 55% by 2029. Projects that begin construction early may lock in lower thresholds — the applicable percentage is based on when construction begins, not when the credit is claimed.
Prevailing Wage Requirements (Commercial, 1 MW+ AC)
For commercial solar projects above 1 MW AC output capacity, prevailing wages must be paid to all workers — from first ground-breaking through project completion.
Key Rules
- Who must be paid prevailing wages: All laborers and mechanics employed in construction, alteration, or repair of the facility, including subcontractor employees
- Prevailing wage rates: Set by the Department of Labor (DOL) per county and work classification (electrician, ironworker, laborer, etc.) — check dol.gov for current rates
- Documentation: Certified payroll records must be maintained for the entire construction period
- Correction period: If a failure to pay prevailing wages is discovered, there is a 180-day window to correct and pay back wages with a 5% interest penalty — but this opportunity closes once the IRS audit window passes
Apprenticeship Requirements
Projects above 1 MW must also use qualified apprentices from registered apprenticeship programs for a minimum percentage of construction labor hours:
| Calendar Year | Minimum Apprenticeship Hours |
|---|---|
| 2023 | 12.5% of labor hours |
| 2024+ | 15% of labor hours |
Apprenticeship hours must be documented separately from prevailing wage records.
Tax Credit Transferability (New Under IRA)
One of the most significant IRA changes: Section 48E tax credits are now transferable. Solar project developers who don’t have sufficient tax liability to use the full credit can sell the credit to a tax credit buyer (typically a large corporation with tax liability).
| Feature | Details |
|---|---|
| Who can transfer | Commercial solar project owners under Section 48E |
| Who can buy | Any US taxpayer with sufficient tax liability |
| How to transfer | File IRS Form 3800 election; negotiate with buyer |
| Discount rate | Buyers typically pay $0.90–0.95 per $1.00 of credit (market rates vary) |
| Timing | Transfer election made on tax return for the year the system is placed in service |
This mechanism allows smaller developers without tax appetite to monetize the full ITC value by selling credits to buyers, rather than having to carry credits forward for years.
Direct Pay (Elective Payment) for Tax-Exempt Entities
Tax-exempt organizations (nonprofits, municipalities, tribes, rural electric cooperatives) traditionally couldn’t use tax credits because they don’t pay federal income tax. The IRA created Direct Pay (Elective Payment) under Section 6417:
- Tax-exempt entities can elect to receive the ITC as a direct cash payment from the IRS
- Equivalent to a 30% grant (refundable)
- Applies to solar projects, battery storage, EV chargers, and other clean energy investments
- Filing: Form 3800 with the entity’s tax return; IRS processes payment within the standard tax refund timeline
This dramatically expands solar access for municipalities, school districts, nonprofits, and tribal nations.
IRA Solar Credit Timeline
| Year | Residential (25D) | Commercial (48E) |
|---|---|---|
| 2024 | 30% | 30% (+ bonuses) |
| 2025 | 30% | 30% (+ bonuses) |
| 2026 | 30% | 30% (+ bonuses) |
| 2027 | 30% | 30% (+ bonuses) |
| 2028 | 30% | 30% (+ bonuses) |
| 2029 | 30% | 30% (+ bonuses) |
| 2030 | 30% | 30% (+ bonuses) |
| 2031 | 30% | 30% (+ bonuses) |
| 2032 | 30% | 30% (+ bonuses) |
| 2033 | 26% | Reduced (unless extended) |
| 2034 | 22% | Reduced (unless extended) |
The 30% rate is locked through 2032 under current law. Congress could extend it further, but as of 2026, 2032 is the reliable planning horizon.
Show Customers the Full IRA Financial Picture
SurgePV calculates Section 25D ITC for residential proposals and Section 48E with bonus credits for commercial projects, showing customers their accurate net cost after all incentives.
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Frequently Asked Questions
What solar tax credits does the IRA provide?
Section 25D provides a 30% residential ITC with no size or income cap through 2032. Section 48E provides a 30% commercial ITC with bonus credits of up to +10% each for domestic content and energy community siting — stacking to 50% for qualifying projects.
What is the prevailing wage requirement for commercial solar?
Commercial solar projects above 1 MW AC must pay prevailing wages (DOL rates by county and work classification) and use qualified apprentices for 15% of labor hours to receive the full 30% ITC. Non-compliance reduces the ITC to 6%.
Can tax-exempt entities claim the IRA solar credit?
Yes. The IRA created Direct Pay (Elective Payment) under Section 6417, allowing nonprofits, municipalities, tribes, and other tax-exempt entities to receive the ITC as a direct cash payment from the IRS — equivalent to a 30% grant on the system cost.
