Section 45L Builder Credit Calculator 2026 β Energy Efficient Home
Calculate the Section 45L energy efficient new home builder credit for 2026. Per-unit credit amounts for ZERH, ENERGY STAR, and manufactured homes through 2032.
Home Type & Certification
Affects multifamily maximum credit
$
For credit-to-revenue ratio analysis %
21% for C-corps, up to 37% for pass-through $0
Total 45L Credit
$0
Credit per Unit
0%
Credit as % of Revenue
$0
Tax Liability Reduction
Section 45L Credit Breakdown
How the Section 45L Builder Credit Works
The Section 45L credit is a dollar-for-dollar reduction in the builder's income tax liability β not a deduction. The credit was significantly enhanced by the Inflation Reduction Act (2022), with expanded amounts tied to DOE's Zero Energy Ready Home program and ENERGY STAR certification levels.
2026 Credit Amounts per Unit
Single Family β ZERH: $5,000/unit
Single Family β ENERGY STAR: $2,500/unit
Multifamily β ZERH (prevailing wage met): $5,000/unit
Multifamily β ENERGY STAR: $2,500/unit
Manufactured Home β ENERGY STAR: $1,000/unit
Credit effective through December 31, 2032
Single Family β ENERGY STAR: $2,500/unit
Multifamily β ZERH (prevailing wage met): $5,000/unit
Multifamily β ENERGY STAR: $2,500/unit
Manufactured Home β ENERGY STAR: $1,000/unit
Credit effective through December 31, 2032
Example
Builder completes 20 single-family ZERH homes in 2026:
Credit per unit: $5,000
Total credit: 20 Γ $5,000 = $100,000
This reduces the builder's tax bill by $100,000 β dollar for dollar.
If C-corp with $500K taxable income, tax drops from $105K to $5K.
Credit per unit: $5,000
Total credit: 20 Γ $5,000 = $100,000
This reduces the builder's tax bill by $100,000 β dollar for dollar.
If C-corp with $500K taxable income, tax drops from $105K to $5K.
Sources and References (click to expand)
Extended
Multi-Home Project Credit Calculator
Calculate 45L credits for mixed certification type projects, per-unit analysis, SVG credit bar chart, annual projection
Model a mixed project with different certification types. Each home type earns a different 45L credit. Compare total credit by certification category.
45L Credit by Home Type
| Home Type | Units | Credit/Unit | Total Credit | % of Total Project Credit |
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Frequently Asked Questions
Who can claim the Section 45L energy efficient home builder credit?
Only the builder (or manufactured home producer) who constructs and sells the qualifying home as the first seller can claim the Section 45L credit. Homeowners who buy existing homes cannot claim this credit β it is exclusively a builder incentive. The builder must be the eligible contractor who first places the qualified energy efficient home in service.
What are the 2026 Section 45L credit amounts?
For 2026 (as updated by the Inflation Reduction Act): $5,000 per unit for Zero Energy Ready Home (ZERH) certified single-family or multifamily homes with prevailing wage; $2,500 per unit for ENERGY STAR certified single-family homes; $5,000 per unit for ZERH certified multifamily; $1,000 per unit for manufactured homes meeting ENERGY STAR standards. The credit is effective through December 31, 2032.
What is the Zero Energy Ready Home (ZERH) program?
The DOE Zero Energy Ready Home (ZERH) program certifies homes that are so energy efficient that a renewable energy system could offset all annual energy consumption. ZERH homes must meet or exceed ENERGY STAR requirements plus additional efficiency measures. Homes certified under ZERH command the $5,000 credit under Section 45L, compared to $2,500 for ENERGY STAR only.
Does the prevailing wage requirement affect the 45L credit?
The prevailing wage requirement primarily affects the multifamily credit tiers. For single-family homes, certification level (ZERH vs ENERGY STAR) drives the credit amount rather than prevailing wages. For multifamily projects with 5+ units, ensuring workers are paid prevailing wages may be required to claim the maximum credit under the IRA expansion.
Is there a recapture risk for the Section 45L credit?
Yes. If a home for which the 45L credit was claimed ceases to qualify within 5 years of the sale (for example, if the energy certification is voided), the credit may be subject to recapture. Builders should maintain records of energy certifications and HERS ratings. Additionally, the credit reduces the basis of the home for the builder, affecting gain calculation on the sale.