Energy Incentives · Brief · Working level
179D allocations from tax-exempt building owners
Since 2023, any tax-exempt building owner — nonprofits, churches, tribal governments, not just government entities — can allocate the Section 179D deduction to the building's designer. The letter must come from an authorized representative and state the allocation amount; disputes cluster around authority and competing designers.
Before 2023, only government building owners could allocate the Section 179D deduction to their designers. The Inflation Reduction Act opened allocation to all specified tax-exempt owners for property placed in service after December 31, 2022: 501(c) organizations, religious organizations, Indian tribal governments, and Alaska Native Corporations, alongside federal, state, and local government entities. The mechanics are unchanged — the exempt owner cannot use a deduction, so an authorized representative signs a letter allocating it to the person who designed the energy-efficient property — but the population of buildings, and of signature disputes, expanded considerably.
Who can allocate now
The IRA turned a government-buildings provision into a tax-exempt-sector provision; hospitals, universities, and churches are the new volume.
| Owner type | Allocation available? | Since |
|---|---|---|
| Federal, state, local government | Yes | 2006 (original provision) |
| 501(c) nonprofits (hospitals, universities, charities) | Yes | Placed in service after 2022 |
| Religious organizations | Yes | Placed in service after 2022 |
| Tribal governments and Alaska Native Corporations | Yes | Placed in service after 2022 |
| Taxable owners | No — owner claims directly | — |
The recipient must be the designer — the person who created the technical specifications for the energy-efficient property: architects, engineers, and design-build contractors, but not installers building to someone else's specs. The dividing line, and the multi-designer allocation rules, are treated in our designer allocation guide; the IRS's 179D page confirms the expanded owner list.
Who signs, and what the letter says
The letter's required contents follow the pattern the IRS set in Notice 2008-40: the names, addresses, and phone numbers of the owner's and designer's representatives; the building's address; the placed-in-service date; the amount of the deduction allocated; and signatures of both representatives, with the owner's representative declaring authority to allocate. Both parties keep executed copies; the designer reports the allocating entity on Form 7205.
Authority is the recurring defect. Government entities usually have procurement officers with documented delegation; nonprofits often do not, and a letter signed by a facilities manager who "handles the building" may bind no one. Designers should ask for officer- or board-level signature, or written evidence of delegation. On the nonprofit side, counsel increasingly reviews these letters because the organization is certifying facts — placed-in-service date, designer identity — that it may be asked to stand behind.
Timing
The letter should be executed before the designer claims the deduction — for the placed-in-service year on an original return, or before filing an amended return for an open year. There is no statutory deadline on the letter itself, but the designer's limitations period runs regardless, and the practical clock is institutional memory: the person who knows which firm designed the 2023 HVAC replacement retires, and the letter becomes unobtainable. With 179D sunset for construction beginning after June 30, 2026, the remaining allocation work is a finite backlog — designers should be sweeping tax-exempt project lists for 2022-forward placed-in-service dates now, as discussed in our post-OBBBA landscape guide.
Common disputes
Three recur. Competing designers: architect and MEP engineer each request the full allocation for the same building; the owner may allocate among designers in any proportion, but the total cannot exceed the building maximum, and owners caught between firms sometimes refuse to sign anything. A policy adopted in advance — many governments and universities now have one — prevents the standoff. Consideration demands: some owners request payment for signing. The letter is not supposed to be sold, and designers paying for allocations should consider both the optics and the deductibility of the payment. Refusals: nothing compels an owner to allocate, and some exempt organizations decline out of caution or administrative burden. A designer with no letter has no deduction — which is why sophisticated design firms now negotiate allocation cooperation clauses into their engagement contracts on tax-exempt work.
Frequently asked questions
- Can a nonprofit allocate the 179D deduction to its architect?
- Yes, for buildings placed in service after 2022. The Inflation Reduction Act extended Section 179D allocations beyond government owners to all specified tax-exempt entities — 501(c) organizations, churches, tribal governments, and Alaska Native Corporations. The nonprofit cannot use the deduction itself; an authorized representative signs an allocation letter transferring it to the person who designed the energy-efficient property.
- What must a 179D allocation letter contain?
- Under the IRS's guidance pattern from Notice 2008-40 as extended to tax-exempt owners, the letter identifies the building and its address, the owner and the designer with their contact information, the placed-in-service date, the amount of the deduction allocated, and signatures of authorized representatives of both parties, with a statement that the representative has authority to allocate.
- Who has authority to sign an allocation letter for a tax-exempt owner?
- A representative with actual authority to bind the organization on the building — typically an executive director, CFO, board officer, or an official with delegated facilities authority for government entities. A project manager or facilities technician usually lacks it. Because the IRS can disregard a letter signed without authority, designers should confirm the signer's role and, ideally, obtain board or officer-level signature.