Incentives
Incentive deadlines and program changes
Nearly every deadline that mattered has passed. What is left is a kind of ending with no date, and that is the one to plan around.
Written by HYRE HVAC Research Desk Primary-source research, data analysis and fact checking
The direct answer
The federal deadlines in home HVAC have all passed. For an installation completed in 2026 the federal tax credit is $0.
Only one date is still ahead: DOE Home Energy Rebate money stays available through September 30, 2031.
That limits the federal money, not your state’s or utility’s program, which can end without notice when its budget or year runs out.
Which dates have passed, and which one has not?
All 8 provisions Public Law 119-21 terminated in this space now carry a date that has passed, as at September 6, 2026. For a residential HVAC installation completed in 2026, the federal tax credit is $0. There is no section of the Internal Revenue Code that provides one.
Exactly one date in this whole space is still in the future, and it is not a tax date. The DOE Home Energy Rebate appropriations remain available through September 30, 2031 under 42 U.S.C. § 18795 and 42 U.S.C. § 18795a.
That is a limit on the federal money — not a promise that your state’s program, or your utility’s, will still be open.
Which is the point of this page. A statutory sunset is the only kind of ending with a date you can look up.
The other four kinds — an allocation running out, a fiscal year closing, a tariff cycle resetting, a program being redesigned — happen without notice, and they are how nearly every incentive a household actually loses is lost.
Five ways an incentive ends, and how much warning each gives
Readers arrive at this page looking for a date. The most useful thing to say is that four of the five ways they can lose an incentive do not have one.
1. Statutory sunset — the only one with a lookup-able date
Congress writes a termination into the statute. 26 U.S.C. § 25C(i) is the example that matters most here: “This section shall not apply with respect to any property placed in service after December 31, 2025.” The date is fixed, public and knowable in advance.
Warning given: complete, but only if you read the statute: The trap is not the date, it is the test — see the section on timing tests below, where a date you thought you had met turns out to be measured from something other than the day you paid.
2. Allocation exhaustion — no date, no warning, first come first served
A program has a fixed pot. When the pot is committed, applications stop being accepted or move to a waitlist. Nothing in the published material changes on the day it happens except, eventually, the status line on the program page.
Warning given: none: HyreHVAC analysis: this is the most common way a household loses a rebate it believed it had, and it is why an approved reservation of funds against your specific project is a different thing from an eligibility check. Ask which one you have.
3. Fiscal-year or program-year reset
Many administrator budgets run on a program year rather than a calendar year. Amounts, measures and caps can all change at the boundary, in either direction, and an application accepted in one year may be paid under different rules from one accepted a week later.
Warning given: usually some, if you know to look: The boundary date is normally published even when the changes are not. It is worth knowing yours before you schedule the work.
4. Tariff or regulatory cycle
A utility rebate is generally a line in a plan filed with, and approved by, a state regulator, on a multi-year cycle. When the cycle turns, the whole portfolio can be redesigned.
Warning given: substantial, and almost nobody uses it: Regulatory proceedings are public. The filed plan says what is proposed for the next period before it takes effect. The utility rebates page covers how to find yours.
5. Program redesign, pause or withdrawal
An administrator pauses to change income verification, replace a contractor registry, or respond to demand it did not expect. The program is not closed and not open.
Warning given: none, and the status language is often ambiguous. “Coming soon”, “temporarily unavailable” and “accepting applications” are three different states and only the last is one you can act on.
The federal dates that have already passed
Printed in the past tense deliberately. A great deal of material still describes these as upcoming deadlines, which is the single most expensive error available in this category.
| Code section | Closed for | Date |
|---|---|---|
| § 25C — Energy Efficient Home Improvement Credit | property placed in service after | December 31, 2025 · passed |
| § 25D — Residential Clean Energy Credit | expenditures made after | December 31, 2025 · passed |
| § 25E — Previously-owned clean vehicle credit | acquired after | September 30, 2025 · passed |
| § 30D — Clean vehicle credit | acquired after | September 30, 2025 · passed |
| § 45W — Qualified commercial clean vehicles credit | acquired after | September 30, 2025 · passed |
| § 30C — Alternative fuel vehicle refueling property credit | placed in service after | June 30, 2026 · passed |
| § 45L — New Energy Efficient Home Credit | qualified new energy efficient home acquired after | June 30, 2026 · passed |
| § 179D — Energy Efficient Commercial Buildings Deduction | property the construction of which begins after | June 30, 2026 · passed |
Termination dates from the IRS table in Fact Sheet FS-2025-05, with the statutory text verified against the United States Code where it bears on HVAC. Read September 5, 2026. Status computed against September 6, 2026.
HYRE calculation: The passed/future split above is computed at build time from the same constants that render the ledger on the hub, so the two pages cannot drift apart. The hub answers whether a provision was ever yours to claim; this page answers only whether its date is behind you.
What is still ahead
Two rows, both of them appropriations rather than tax provisions. That is the whole shape of the current position in a single table.
| Authority | What the date is | Date |
|---|---|---|
| 42 U.S.C. § 18795a (IRA § 50122) | The HEAR appropriation — “$4,275,000,000, to remain available through September 30, 2031” | September 30, 2031 |
| 42 U.S.C. § 18795 (IRA § 50121) | The HOMES appropriation — “$4,300,000,000, to remain available through September 30, 2031” | September 30, 2031 |
Read from the United States Code September 6, 2026.
This is not a deadline you can plan around: It is the outer limit on the federal funds.
A state program funded from them can exhaust its allocation, pause, or close years earlier, and DOE publishes no national status list: DOE publishes no national list of which state programs are open today.
Both energy.gov program pages route the reader to their State or Territory Energy Office instead. The date that governs you is your administrator’s, and it is not published anywhere central.
The part of a deadline that is not the date: what the clock is measured from
Two statutes with the same termination date can close on different days for the same buyer, because they measure the moment differently. This is where deadlines are actually missed.
Source fact: 26 U.S.C. § 25C turned on when property was “placed in service”. 26 U.S.C. § 25D turned on when “expenditures made”. And 26 U.S.C. § 179D, the commercial deduction, turns on something different again — when construction “begins construction”.
Source fact: 26 U.S.C. § 25D(e)(8) fixes the second of those: “Except as provided in subparagraph (B), an expenditure with respect to an item shall be treated as made when the original installation of the item is completed.”
The IRS confirms it for 26 U.S.C. § 25D: “Section 25D(e)(8)(A) provides that an expenditure with respect to an item is treated as made when the original installation of the item is completed.” (IRS Fact Sheet FS-2025-05, Q7).
And 26 U.S.C. § 25C(f) provides that “Rules similar to the rules under paragraphs (4), (5), (6), (7), and (8) of section 25D(e) shall apply.”
The desk’s reading, labeled as such: Because § 25C(f) imports rules similar to § 25D(e)(8), the desk reads the same installation-completion test as governing § 25C — so a system paid for in December 2025 but installed in January 2026 falls outside the credit.
This is the HYRE HVAC Research Desk’s reading of the statutory cross-reference. The IRS has published no § 25C-specific guidance on the 2025-purchase / 2026-installation case: FS-2025-05 contains exactly one § 25C question, and it concerns manufacturer reporting.
HyreHVAC analysis — why this generalises: The federal case is now historical, but the lesson is not.
Every program measures its deadline from something: the invoice date, the installation completion date, the date the application was submitted, the date funds were reserved, or the date the work was inspected.
Those can be months apart on the same project. When an administrator tells you a deadline, the second question is always “measured from what event” — and the answer should be in the program document, not in a phone call.
A monitoring routine that costs about ten minutes a quarter
Nobody will tell you when your incentive is about to disappear. These are the four checks that give you the most warning for the least effort.
Amounts, eligibility text and status line, with the date visible. Program pages are edited in place without version history, and a dated capture of what the administrator published when you committed is the only record that survives the edit.
These are different, and administrators do not always distinguish them clearly. A reservation is a claim on the pot; an eligibility check is an opinion about you. Only the first survives allocation exhaustion.
It tells you when the whole rebate portfolio is next up for redesign, and the filed plan is public before it takes effect. This is the only one of the five endings that gives real advance warning, and it is the one nobody uses. How to find it.
The gap between an Act passing and secondary material catching up is long. Public Law 119-21 was enacted July 4, 2025, and as read September 5, 2026 the IRS’s own credit landing page still described the credit without reference to it. The statute is the fastest reliable source, not the slowest.
One deadline that behaved differently, and why it is worth knowing
The commercial deduction was terminated by the same Act on a date that has also now passed — but its test is the reason some buildings are still inside it.
Source fact: 26 U.S.C. § 179D(i), added by Public Law 119-21 § 70507: “This section shall not apply with respect to property the construction of which begins after June 30, 2026.”
The IRS states the same in its own table: “The deduction will not be allowed with respect to any property the construction of which begins after June 30, 2026.”
HyreHVAC analysis: A begins construction test behaves quite unlike a placed in service test. A residential system installed on January 2, 2026 fell outside 26 U.S.C. § 25C regardless of when it was ordered or paid for.
A commercial building whose construction began on June 29, 2026 remains inside 26 U.S.C. § 179D however long it takes to finish and place the property in service. The same Act, the same year, opposite behavior — because the sentence measures a different event.
That distinction, the 2026 deduction amounts and the state of the guidance on establishing a construction start are on the commercial incentives page. It is not a homeowner’s provision and is covered here only for its date.
Method, and the review trigger for this page specifically
Method: Every date on this page was read from the United States Code or from the IRS at the dates given, and the passed/future split is computed at build time from those constants rather than typed.
No state or utility deadline appears on this page, because none is centrally published and a list of them would be wrong before it shipped.
This is the page in the archive that decays fastest, and it is the one where materially outdated information does the most damage — a reader who acts on a stale deadline makes an irreversible purchase.
Scheduled review: December 2026, and immediately on any of: enacted federal tax or energy legislation; new IRS guidance on any provision listed here; or DOE publishing a national program status list, which would change what this page ought to contain. A retrieved date records when we looked.
Questions
When does the federal heat pump tax credit expire?
Is there any federal HVAC incentive deadline still in the future?
How will I know if my state rebate program is about to run out of money?
If I paid for a system before the deadline but it was installed afterwards, does that count?
Why do utility rebate amounts change?
Did the One Big Beautiful Bill Act end the DOE rebate programs too?
Written and audited by
HYRE HVAC Research Desk
Primary-source research, data analysis and fact checking
We are a research desk, not a sales floor. We read the federal microdata file, the statute or the manufacturer data sheet ourselves, and we publish the figure with the document it came from and the date we retrieved it.
Where a number cannot be traced to a primary source, we publish the shorter page and say what we could not verify.
The counts below are generated from the published pages themselves, last counted September 28, 2026, and they are what we have actually published rather than what we intend to.
- 13
- studies published
- 12
- federal sources read and cited
- 8
- studies published with their full dataset as CSV
- 51
- jurisdictions reproduced against EIA’s own tables
How this desk works
- Primary sources only. Federal data comes from the agency that collects it, in the file that agency publishes. We do not cite an article that cites a source; we download the source and compute the figure ourselves.
- We validate against the agency before we publish. First, we use each federal microdata file to reproduce the agency’s own published tables. Our cooling research reproduces EIA’s state estimates and standard errors for all 51 jurisdictions. That check caught a variance formula that was off by a factor of four.
- Every estimate carries its uncertainty. These are survey figures, not counts. Standard errors are computed from the replicate weights the federal file supplies and printed beside the estimate. An estimate too imprecise to publish is reported as such rather than printed.
- Nothing is typed by hand. Prose, tables and charts all read from one dataset built by script, so a number in a sentence and the same number in the table below it cannot disagree.
- We publish the data, not just the conclusion. 8 of our 13 studies offer the full computed table as a CSV download on the page, so you can check the analysis or disagree with it. A study without a row-level dataset gets no download link and claims none in its structured data.
- We correct in public. Where we have published a figure wrongly we fix the figure, rewrite any analysis that rested on it rather than patching the number underneath it, and leave a dated correction note on the page.
- We do not install or sell HVAC equipment, and we take no payment for placement, ranking or a favorable mention. Nobody buys a position on this site.
Data as of Federal dates as read September 5, 2026; appropriations as read September 6, 2026. Authorship on this site is organizational: the analysis belongs to the desk rather than to a named individual, and we do not publish credentials we do not hold.
Our editorial policy sets out how we source, date and correct what we publish.
Sources & retrieval dates
This is not tax advice: HyreHVAC does not install, service or sell HVAC equipment, is not a tax adviser, and receives no fee from any incentive program. What is published here is the statutory text with the date we read it.
Tax law changes, and it changed here recently — confirm the current position at irs.gov and with a tax professional before you put any credit or rebate into a purchase decision, in either direction.