Follow the deduction
Owner authorization and technical proof do different jobs
For a designer, the Section 179D path begins with an eligible building owner. A specified tax-exempt owner may choose to allocate some or all of an otherwise allowable deduction to a designer that created technical specifications for qualifying energy-efficient property. The owner is not required to allocate, and a designer cannot create that authority by completing an energy model.
The written allocation records the owner's decision. Certification addresses whether the property satisfies the technical requirements. Both may be necessary, but one does not replace the other.
Before requesting a signature, confirm the building's legal owner and status. A school, hospital, or nonprofit label alone does not establish who owns the property or whether the statutory owner category is satisfied.
Not a template
Eight information groups to reconcile
Notice 2008-40 identifies core information for a government-owner allocation. The notice predates the expanded statutory owner categories, so the document should be reviewed with current law and current Form 7205 instructions—not copied blindly as a universal form.
Owner name, address and contact
Designer name, address and contact
Building address
Cost of qualifying property
Placed-in-service date
Allocated deduction amount
Authorized owner and designer signatures
Owner declaration under penalties of perjury
This annotated checklist is an editorial aid, not a ready-to-sign allocation instrument.
Hypothetical reconciliation
The letter cannot allocate more than the available amount
Assume a separately substantiated building deduction of $300,000. The owner authorizes $200,000 to one designer. The other $100,000 is a remainder—it is not automatically available to that designer and should not silently appear in its filing workpapers.
| Measure | Amount |
|---|---|
| Substantiated building amount | $300,000 |
| Owner-authorized allocation | $200,000 |
| Unallocated remainder | $100,000 |
Before filing
Make every record describe the same project
The allocation, calculation workpapers, certification, and Form 7205 should identify the same property, owner, designer, placed-in-service date, and amount. If several designers are involved, reconcile the building-wide total before signatures are collected.
Form 7205 reports building, property, calculation, certifier, and designer-allocation information. It accompanies the applicable return; it is not itself an amended income-tax return. The filing team should confirm the proper form revision and whether Form 7220 applies to an increased amount.
- Verify legal owner identity
- Confirm signatory authority
- Match the property and service date
- Tie amount to building calculation
- Reconcile all designer allocations
- Retain signed certification and allocation
See Notice 2008-40, section 3 and the current Form 7205 instructions.
Resolve discrepancies in one owner-designer review before anyone files.
Common questions
Practical answers before the review
Does certification replace an allocation?
No. Certification supports technical qualification; the written allocation records the eligible owner's decision to allocate an amount to a designer.
Must the letter be attached to the return?
The signed allocation is generally retained with the supporting records rather than treated as a substitute for Form 7205. Confirm the applicable filing instructions with the return preparer.
Can the allocation exceed the building deduction?
No owner-approved designer allocations should collectively exceed the properly determined building amount, which may also be limited by eligible cost and prior deductions.