If you build homes for a living, the 45L tax credit is one of the more rewarding breaks the tax code has offered in years. It pays eligible contractors a set amount for every qualified new energy efficient home they build to certain standards. For a builder putting up dozens or hundreds of units, that adds up fast.
There is a catch worth knowing right away, and it is the reason this guide matters more now than a year ago. A recent law moved up the expiration date, and the window to acquire qualifying homes has already closed. The good news is that the credit is not fully behind you. If you built and sold or leased eligible homes inside the qualifying period, you may still be able to claim the 45L tax credit, including on amended returns. Here is the full picture, in plain terms.
The Section 45L tax credit, officially the New Energy Efficient Home Credit, is a federal tax credit for builders and developers who construct energy-efficient homes. It sits in the Internal Revenue Code at IRC Section 45L, and it rewards the eligible contractor, not the homeowner. In other words, this is a business tax break aimed at the people who actually build.
The credit first appeared back in 2005, but it became far more valuable when the Inflation Reduction Act of 2022 overhauled it. That update raised the credit amounts, tied them to well-known energy programs, and opened the door for more multifamily projects to qualify. Since then, the 45L tax credit has been a real tool for lowering a builder's tax burden while pushing the housing stock toward better energy efficiency.
Here is the part that trips up anyone reading older articles. Under the Inflation Reduction Act, the 45L credit was set to run all the way through the end of 2032. The One Big Beautiful Bill Act, signed in July 2025, cut that short in a big way.
Under the new law, the 45L tax credit is gone for qualified homes acquired after June 30, 2026. For 45L purposes, a home is "acquired" when it is sold or leased to a person for use as a residence, so a project under construction generally has to be finished and handed to a buyer or tenant to count. Since that June 30 date has now passed, no home acquired after it qualifies. If you had projects wrapping up in the first half of 2026, they may have made it under the wire. Anything acquired later did not.
The credit amount depends on the type of home and the energy program it was certified to. For homes acquired from 2023 through June 30, 2026, single-family and manufactured homes earn:
Manufactured homes follow the same idea through the ENERGY STAR Manufactured New Homes track. For homes acquired before 2023, the older rules apply, and the credit was $1,000 or $2,000 per dwelling unit depending on the energy saving requirements met. If you never claimed those older amounts on eligible homes, they may still be worth revisiting.
Multifamily is where the 45L tax credit gets interesting, because the credit is calculated per dwelling unit. Build an energy-efficient apartment community and each qualifying unit can carry its own credit, which is how developers reach six-figure totals.
The amounts work a little differently here. A multifamily dwelling unit certified to the ENERGY STAR Multifamily New Construction program earns $500 per unit, and a unit certified to Zero Energy Ready Home earns $1,000 per unit. But there is a large bonus for meeting federal prevailing wage rules on the project. Pay prevailing wages and those numbers jump to $2,500 per unit for ENERGY STAR and $5,000 per unit for ZERH. That is a five-fold increase, so the wage decision often drives the whole economics of a build. Worth noting, prevailing wage applies to multifamily only, and unlike some other clean energy incentives, 45L does not carry an apprenticeship requirement. This tiered structure is a big reason the credit became popular in low-income housing tax credit deals.
Not everyone who touches a project can claim the credit. To be the eligible contractor, you must have owned the home and held a basis in it during construction, and then sold or leased it to someone for use as a residence. The home also has to be located in the United States.
This is a common point of confusion. A general contractor hired to do the work is usually not the eligible party. The credit belongs to the taxpayer who owned the property while it was being built, typically the developer or builder-owner. So before anyone counts on the 45L tax credit, it is worth confirming who actually held ownership and basis during construction.
You cannot just say a home is efficient. Each eligible home needs third-party certification showing it met the applicable ENERGY STAR or Zero Energy Ready Home program version. That certification is usually handled by a qualified energy rater, often a HERS rater, who inspects and tests the home against the standards.
One detail that catches builders off guard: the program version you have to meet is based on the home's acquisition date, not its permit date. The DOE Zero Energy Ready Home program and the ENERGY STAR program each publish version tables by year, so the right target shifts over time. Keeping clean proof of certification for every home and dwelling unit is what protects the claim if the IRS ever asks.
You claim the credit on Form 8908, Energy Efficient Home Credit, which you attach to your federal tax return. It flows through as part of the general business credit, and you take it for the tax year in which each home was acquired, meaning sold or leased as a residence.
The practical workflow looks like this: build to an eligible ENERGY STAR or ZERH standard, get each home certified by a qualified rater, keep the documentation, then report the qualifying homes on Form 8908. IRS Notice 2023-65 lays out the finer points for homes acquired in 2023 and after. Because the dollars per project can be large and the rules are specific, most builders bring in a specialist to run the numbers and stand behind the certification.
Yes, for the right homes. The June 30, 2026 deadline was about when a home had to be acquired, not when you had to file. So if you sold or leased qualifying energy-efficient homes any time from 2023 through June 30, 2026, those homes can still generate a 45L tax credit on the return for their acquisition year. Homes acquired in the first half of 2026 belong on your 2026 return.
There is also a look-back opportunity. If you built eligible homes in earlier years and never claimed the credit, you can often file an amended return to capture it, generally within the last three tax years. That can turn overlooked projects into a real refund. Congress has let this credit lapse and revived it before, so a future reinstatement is not impossible, but under current law the acquisition window is closed and the smart move is to make sure you captured every home you already qualified for.
If you think past projects might qualify, Madras Accountancy can review your builds against the ENERGY STAR and Zero Energy Ready Home requirements, coordinate the certification paperwork, and prepare Form 8908 so you claim every dollar the 45L tax credit still allows.
1. What is the 45L tax credit? It is a federal tax credit under Section 45L, also called the New Energy Efficient Home Credit, paid to eligible contractors for each qualified new energy efficient home they build and then sell or lease as a residence.
2. How much is the 45L tax credit worth? For homes acquired from 2023 through June 30, 2026, single-family and manufactured homes earn $2,500 (ENERGY STAR) or $5,000 (Zero Energy Ready Home). Multifamily units earn $500 or $1,000 per dwelling unit, rising to $2,500 or $5,000 per unit when prevailing wage requirements are met.
3. Did the 45L tax credit expire? Effectively yes. The One Big Beautiful Bill Act moved the sunset up from the end of 2032 to June 30, 2026. Homes acquired after that date are no longer eligible for the credit.
4. Can I still claim the 45L credit now? For qualifying homes acquired on or before June 30, 2026, yes. Those go on the tax return for their acquisition year, and eligible homes from earlier years may be claimed on an amended return, usually within the past three years.
5. Who is eligible to claim the credit? The eligible contractor, meaning the party that owned the home and had a basis in it during construction and then sold or leased it as a residence. A hired general contractor who did not own the property generally cannot claim it.
6. What certification does a home need? Each home needs third-party certification to the applicable ENERGY STAR or DOE Zero Energy Ready Home program version, based on the home's acquisition date. A qualified energy rater typically handles this.
7. How do multifamily projects qualify? Multifamily homes are claimed per dwelling unit. To earn the higher $2,500 or $5,000 per unit amounts, the project must meet federal prevailing wage requirements. Prevailing wage applies to multifamily only.
8. What form do I use to claim the 45L tax credit? Form 8908, Energy Efficient Home Credit, attached to your federal tax return. The credit is taken for the tax year each home was acquired and flows through the general business credit.
The 2026 1099 reporting threshold changed: 1099-NEC and 1099-MISC now start at $2,000, and 1099-K is back to $20,000. Here is what you must file.
A plain guide to how a 2026 sales tax holiday works, which items are exempt, and the rules on price caps, refunds, and rain checks.
Form 7004 buys a 6-month extension of time to file business returns like 1065, 1120-S and 1120. Deadlines, e-file steps and the payment trap.
