Federal Historic Tax Credit.

What the HTC does

The federal Historic Tax Credit (HTC), authorized under Section 47 of the Internal Revenue Code, provides a 20% income tax credit on the Qualified Rehabilitation Expenditures (QREs) incurred in the certified rehabilitation of a certified historic structure. The credit is claimed by the property owner (or, in a master tenant structure, by a special-purpose lessee).

Two federal agencies share jurisdiction: the Internal Revenue Service administers the tax aspects of the credit, while the National Park Service (NPS) — through its Technical Preservation Services office — certifies whether the building qualifies as a historic structure and whether the proposed rehabilitation complies with the Secretary of the Interior's Standards for Rehabilitation. State Historic Preservation Offices (SHPOs) play a key supporting role: they review applications first and forward them with recommendations to NPS.

Program history

The federal historic preservation tax incentive structure dates to the Tax Reform Act of 1976, which created a deduction for rehabilitating historic buildings. The Economic Recovery Tax Act of 1981 (ERTA) converted the deduction to a more valuable credit. The Tax Reform Act of 1986 set the credit at 20% for certified historic structures (and 10% for non-historic pre-1936 buildings — eliminated by TCJA in 2017).

The Tax Cuts and Jobs Act (TCJA) of 2017 made a significant change: the 20% credit must now be claimed ratably over 5 years (4% per year) rather than 100% in the year the building is placed in service. This change reduced HTC pricing in syndication markets by approximately 10-15% from pre-TCJA levels.

OBBBA made no changes to HTC. The credit operates under TCJA-amended Section 47.

How it works

What qualifies as a "certified historic structure"

A building qualifies if it is either:

• Individually listed on the National Register of Historic Places, or
• Located in a registered historic district and certified by the NPS as contributing to the historic significance of that district

The building must be income-producing after rehabilitation (commercial, industrial, agricultural, or rental residential — but not owner-occupied residential).

The 3-Part Application Process

1. Part 1: Evaluation of Significance. Confirms the building qualifies as a certified historic structure. Filed with the SHPO, which forwards to NPS. Not required if the property is already individually listed on the National Register.
2. Part 2: Description of Rehabilitation. Describes the proposed rehab work in detail with photos and drawings. NPS evaluates compliance with the Secretary of the Interior's Standards for Rehabilitation. Approval is required before the rehab work begins — though work can begin at owner's risk if the application is pending.
3. Part 3: Request for Certification of Completed Work. Filed after rehab completion. NPS confirms the actual work followed the approved Part 2 plans. The Part 3 certification is what the owner submits to the IRS to claim the credit.

The substantial rehabilitation test

QREs must exceed the greater of $5,000 or the adjusted basis of the building (typically depreciated cost basis, excluding land). This must be met within a 24-month measurement period (or 60 months for phased projects). The substantial rehabilitation test is what distinguishes "rehab" from minor work.

What counts as QRE

Qualified Rehabilitation Expenditures include:

• Direct rehab construction costs
• Architectural and engineering fees
• Construction-period interest and taxes
• Developer fees attributable to the rehab
• Reasonable site work directly tied to the historic structure

QRE excludes acquisition costs, costs of enlargement, costs allocable to non-historic additions, site improvements not directly tied to the structure, and landscaping.

Compliance and recapture

The HTC has a 5-year recapture period running from the placed-in-service date. Disposition of the property or change in use during this period triggers recapture on a sliding scale (100% in year 1, 80% in year 2, etc., dropping to 0% after year 5). Most syndicated HTC deals are structured to ensure the building remains in service for the full recapture period.

Standalone HTC use cases (no LIHTC)

HTC is heavily used in deals with no affordable-housing component. Typical standalone deployments:

• Market-rate commercial rehabilitation: Office buildings, hotels, retail, mixed-use loft conversions — downtown historic adaptive reuse without any residential affordability layer.
• Hospitality: Historic hotel renovations are one of the largest single uses of HTC equity nationally.
• Industrial / warehouse conversion: 19th-century manufacturing buildings converted to creative office, lab/tech space, food halls, or market-rate residential.
• Civic and institutional: Historic schools, courthouses, post offices, churches repurposed as community facilities or mixed-use developments.
• Pure historic preservation: Deals where the historic character of the structure — not affordability — is the dominant capital story; HTC equity plus conventional debt and developer equity.

In all of these contexts the HTC mechanics are identical: 20% credit on QREs, 5-year ratable claim, 5-year recapture, NPS Part 1/2/3 process. The choice to pair with LIHTC, NMTC, or stand alone is a capital-stack decision, not a program-level constraint.

Labor standards — HTC alone does not trigger Davis-Bacon

HTC is a federal income-tax credit, not direct federal financial assistance. On its own it does not trigger federal Davis-Bacon prevailing-wage coverage. HTC deals that layer federal funds (HOME, CDBG, HUD-insured debt) for the affordable-housing component trigger Davis-Bacon through those funding sources at their own program thresholds. State and local prevailing-wage laws apply independently of federal status.

LIHTC pairing (master tenant structure)

When HTC is paired with LIHTC on a historic adaptive-reuse deal, the standard solution to the IRC § 50(c) basis-reduction problem (the HTC reduces the building's basis, which would otherwise reduce LIHTC eligible basis) is the master tenant lease structure. The Owner LLC holds title and claims LIHTC; an Owner-side election under IRC § 50(d)(5) passes the rehab basis through to a Master Tenant LLC, which claims the HTC and includes the credit in income over the recovery period. Different equity investors fund each entity. The structure preserves the full economic value of both credits but adds significant transaction complexity.

For the full deal-structure detail — capital stack math, equity pricing, syndication mechanics, triple-stacking with NMTC and OZ, and master-tenant tax accounting — see the dedicated guide: LIHTC Deal Structures Guide.

State Historic Tax Credits

As of January 2026, 38 states offer state HTC programs that can be combined with the federal credit (per the National Trust for Historic Preservation state-credits tracker). State HTC rates, caps, and transferability rules vary widely — some are flat percentages, others are sliding-scale, others are capped per project or per year. Verify the current rate, cap, and transferability rules in your jurisdiction directly with the state's historic preservation office before relying on a specific combined-credit number in underwriting.

How to apply

1. Confirm National Register status (individually listed or contributing in a district)
2. Engage architect familiar with the Secretary of the Interior's Standards
3. File Part 1 (if needed) and Part 2 with the SHPO well before construction
4. Receive NPS Part 2 approval before incurring substantial QRE
5. Complete rehab in conformance with approved Part 2
6. File Part 3 after completion; receive NPS final certification
7. Claim credit on IRS Form 3468 ratably over 5 years beginning the year placed in service

Pairing with other programs

• LIHTC: Master tenant structure (see above) for affordable historic adaptive reuse. See LIHTC Deal Structures Guide for full stack mechanics.
• State HTC: Stacks directly with federal HTC in 38 states (per the National Trust for Historic Preservation, January 2026)
• NMTC: Available for QALICB-eligible properties in low-income census tracts (commercial component of mixed-use)
• HOME / HTF / CDBG: Gap financing layers for affordable units in historic adaptive reuse
• Opportunity Zones: Layered when the historic property is in an OZ tract

Practitioner resources

• National Park Service Technical Preservation Services (HTC homepage)
• The Secretary of the Interior's Standards for Rehabilitation
• National Register of Historic Places search
• Your State Historic Preservation Office (SHPO)
• IRS Form 3468 instructions (current year)
• Industry resources: Novogradac HTC coverage, NCSHA, National Trust for Historic Preservation