Is the 45L Tax Credit Going Away?

Yes. The 45L new energy efficient home credit has already ended for homes acquired after June 30, 2026, under the One, Big, Beautiful Bill Act. Builders can still claim it for qualifying homes that were sold or leased for use as a residence on or before that date.

$5,000For homes acquired in 2023 through June 30, 2026, the IRS says the credit is up to $5,000 per home, depending on the type of home and the program it was built under.
$2,500Single-family and manufactured homes: $2,500 for an Energy Star certified home, or $5,000 for a home certified under the Zero Energy Ready Home program.
$500Multifamily units: $500 or $1,000 per unit, or $2,500 or $5,000 per unit if the project met prevailing wage requirements.
$1,000Multifamily units: $500 or $1,000 per unit, or $2,500 or $5,000 per unit if the project met prevailing wage requirements.

The Section 45L credit pays eligible contractors, usually home builders and manufactured home producers, for building new homes that meet Energy Star or Department of Energy Zero Energy Ready Home standards. The Inflation Reduction Act had extended it through 2032. The One, Big, Beautiful Bill Act (Public Law 119-21, signed July 4, 2025) moved the end date up: the credit does not apply to any qualified new energy efficient home acquired after June 30, 2026. The IRS lists the same June 30, 2026 cutoff in its fact sheet on the energy credits the law ended early.

For homes acquired in 2023 through June 30, 2026, the IRS says the credit is up to $5,000 per home, depending on the type of home and the program it was built under.

Last checked: November 10, 2026. This page explains the rules only. It is general information, not legal, tax, or financial advice.

The short version

Homes acquired after June 30, 2026: no 45L credit.
Homes acquired on or before June 30, 2026: the builder can still claim the credit on its return for the tax year the home was sold or leased, if the home met the energy requirements and was certified.
The date that matters is when the home is acquired by the buyer or tenant for use as a residence, not when construction started or finished.
Single-family and manufactured homes: $2,500 for an Energy Star certified home, or $5,000 for a home certified under the Zero Energy Ready Home program.
Multifamily units: $500 or $1,000 per unit, or $2,500 or $5,000 per unit if the project met prevailing wage requirements.
The credit is claimed on Form 8908 as part of the general business credit, and it reduces the home's tax basis by the amount of the credit.

Who qualifies

The eligible contractor is the person who built the home. For a manufactured home, it is the manufactured home producer.
The home has to be a dwelling unit located in the United States and acquired from the contractor for use as a residence. Construction includes substantial reconstruction and rehabilitation.
Single-family homes have to meet the Energy Star Single-Family New Homes requirements (version 3.2 for homes acquired after December 31, 2024), or be certified as a Zero Energy Ready Home.
Manufactured homes have to meet the Energy Star Manufactured Home requirements, or the Zero Energy Ready Home standard.
Multifamily units have to meet the Energy Star Multifamily New Construction requirements, or the Zero Energy Ready Home standard. The higher multifamily amounts require prevailing wages for the laborers and mechanics who built the project.
The energy savings have to be certified in writing, following IRS guidance.

How to get it

How to get started

List every home or unit you built and the date each was sold or leased to the person who lives there. Only homes acquired on or before June 30, 2026 can qualify.
Gather the Energy Star or Zero Energy Ready Home certification for each home. Without the certification, there is no credit.
For multifamily projects, pull your payroll records showing prevailing wages were paid if you plan to claim the higher per-unit amounts.
Work with your tax preparer to claim the credit on Form 8908 with the return for the year each home was acquired, and reduce each home's basis by the credit.
If you built qualifying homes in earlier years and never claimed the credit, ask your tax preparer whether an amended return is still possible for those years.

Programs that may match

Look beyond

The 179D deduction for energy efficient commercial buildings, which ended for construction that begins after June 30, 2026.Business solar tax credits that are ending.What the One, Big, Beautiful Bill changed for small businesses.Cost segregation studies.Find other programs you may qualify for with FundPlenty's free match at fundplenty.com.

FAQ

When does the 45L tax credit expire?

It already has, for new sales. The credit does not apply to any qualified new energy efficient home acquired after June 30, 2026. The One, Big, Beautiful Bill Act moved the end date from December 31, 2032 to June 30, 2026.

Can I still claim 45L for a home I sold in early 2026?

Yes, if the home was acquired by the buyer or tenant for use as a residence on or before June 30, 2026, it met the Energy Star or Zero Energy Ready Home requirements, and you have the certification. You claim it on Form 8908 with your return for that tax year.

Does it matter when construction started?

No. The cutoff is based on when the home is acquired, meaning sold or leased to the person who will live in it. A home finished before June 30, 2026 but sold after that date does not qualify.

How much was the 45L credit worth?

For homes acquired from 2023 through June 30, 2026, the IRS says up to $5,000 per home. Single-family and manufactured homes got $2,500 for Energy Star certification or $5,000 for Zero Energy Ready Home certification. Multifamily units got $500 or $1,000, or $2,500 or $5,000 with prevailing wages.

What about homes acquired before 2023?

The older version of the credit was $1,000 or $2,000 per home, depending on the energy savings met.

Is Congress bringing 45L back?

As of November 10, 2026, the law still ends the credit for homes acquired after June 30, 2026. Check irs.gov for any changes before you file.