- The median Phoenix metro STR generates ~$46,400 in Year-1 federal tax savings on a $700K Old Town Scottsdale property at the 37% bracket with 100% bonus depreciation under OBBBA (2025+). Engine-truth reclassification: 27.5% of depreciable basis into 5/7/15-year MACRS classes — driven by snowbird-season and event-week FF&E density. Add ~$3,100 in AZ state tax savings at 2.5% for ~$49,500 total.
- Phoenix metro land allocation runs 18%–42% depending on neighborhood, per Maricopa County Assessor records. Ultra-luxury Paradise Valley hits 42%; Old Town Scottsdale and Arcadia run 35%; Tempe ASU-adjacent runs 24%; workforce neighborhoods (Maryvale, Glendale) run ~18%.
- Arizona SB1350 protects STRs from local bans, materially reducing regulatory risk vs other US markets. Where Nashville Type 2 and Miami Beach restrict where STRs can operate, AZ state law preempts city-level bans. Cities can require registration/permits but cannot prevent STR operation entirely. This makes Phoenix cost-seg outcomes more durable than markets with active STR enforcement risk.
Cost segregation is a 25-year-old US tax strategy with most of its industry data locked behind paid reports or major-firm marketing claims. Phoenix metro's massive 2010-2024 redevelopment plus the snowbird + spring training + Super Bowl 2026 event calendar create a particularly clean dataset: a market with consistent property-type composition (Old Town Scottsdale STR concentration, Tempe ASU-adjacent multifamily, Camelback corridor commercial, Desert Ridge new build) and well-documented Maricopa County Assessor records.
This page publishes Phoenix-specific cost-segregation benchmarks as an open dataset. Numbers are engine-truth outputs from the Cost Seg Smart cost segregation engine, calibrated against RSMeans 2024 construction cost data, MACRS classification per Rev. Proc. 87-56, and the IRS Cost Segregation Audit Techniques Guide (Pub 5653). Land allocation reflects Maricopa County Assessor typical ratios. CC-BY 4.0; cite with attribution.
Phoenix cost segregation at a glance
Methodology & data sources
Numbers on this page are produced by the Cost Seg Smart cost segregation engine, applying RSMeans 2024 cost data + MACRS classification per Rev. Proc. 87-56 + the IRS ATG framework to representative Phoenix metro property profiles.
- RSMeans 2024 Building Construction Cost Data — primary $/SF cost basis with Phoenix metro regional multipliers.
- Maricopa County Assessor (mcassessor.maricopa.gov) — land allocation methodology, full cash value records.
- IRS Pub 946 — depreciation rules, MACRS conventions, recovery-period tables.
- Rev. Proc. 87-56 — asset class lives.
- IRS Pub 5653 (Cost Segregation ATG) — 13-element quality framework.
- Arizona Department of Revenue — bonus depreciation conformity context.
- AZ Rev. Stat. § 9-500.39 (SB1350) — short-term rental state preemption framework.
- BLS Producer Price Index (Construction) — time-index cost adjustment.
Reclassification percentage by Phoenix property type
| Property type | Median accel % | 5-year % | 15-year % | Notes |
|---|---|---|---|---|
| Short-term rental (STR / Airbnb) | 27.5% | ~20% | ~7% | Snowbird + spring training + Super Bowl 2026 drive FF&E density |
| Single-family rental (LTR) | 18.5% | ~9% | ~9% | Standard suburban SFR profile |
| Condo (Downtown / Tempe) | 14.0% | ~13% | ~1% | HOA-owned site improvements reduce share |
| Duplex / triplex / fourplex | 19.5% | ~12% | ~7% | Slightly above SFR due to per-unit FF&E |
| Office (Camelback / Downtown) | 27.5% | ~17% | ~10% | Commercial site work + 5-year fixtures |
| Retail / restaurant (Old Town / Downtown) | 30.5% | ~22% | ~8% | Storefront fixtures + commercial finishes |
Source: Cost Seg Smart cost segregation engine, Phoenix metro neighborhood calibration.
Land allocation by Phoenix metro neighborhood
| Neighborhood / area | Typical land % | Notes |
|---|---|---|
| Downtown Phoenix (Roosevelt, Garfield, Evans Churchill) | 26% | Urban infill, condo + mid-rise mixed-use |
| Old Town Scottsdale (85251) | 35% | Premium walkable, high-density STR market |
| Arcadia / Biltmore (85018) | 35% | Established luxury, Camelback adjacent |
| Tempe (85281) | 24% | ASU university corridor, MTR + student housing |
| Paradise Valley (85253) | 42% | Ultra-luxury, large desert estates |
| Camelback East (85016) | 30% | Premium commercial corridor + residential mix |
| Phoenix North / Desert Ridge (85050) | 22% | Master-planned suburban, modern build 2000s+ |
| Other Phoenix metro (Maryvale, Glendale, Mesa) | 18% | Suburban / workforce baseline |
Source: Maricopa County Assessor (mcassessor.maricopa.gov) typical ratios, 2024–2026 records.
Cost segregation study pricing in Phoenix (2026)
| Purchase price | Residential / STR / condo | MF 2-4 unit | Commercial / MF 5+ |
|---|---|---|---|
| Under $300K | $495 | — | — |
| $300K–$700K | $795 | $995 | $995 |
| $700K–$1M | $895 | $995 | $995 |
| $1M–$2M | $1,295 | $1,395 | $1,395 |
| $2M–$5M | $1,595 | $1,695 | $1,895 |
| $5M–$15M | $1,895 | $1,995 | $2,495 |
Cost Seg Smart automated provider pricing as of May 2026. Traditional engineering firms typically quote $5,000–$15,000 for the same property. See costsegregationreviews.com for customer reviews.
Three Phoenix metro properties, full math
Engine-truth outputs assuming 2025 placed-in-service, 100% bonus depreciation under OBBBA, 37% federal bracket. Arizona state tax (2.5%) adds incremental savings not shown in totals below.
1. Old Town Scottsdale 3BR STR — $725K
| Purchase price | $725,000 |
| Land allocation (Maricopa Old Town Scottsdale typical) | $253,750 (35.0%) |
| Depreciable basis | $471,250 |
| Reclassified 5-year (FF&E + finishes) | $98,000 |
| Reclassified 7-year | $2,800 |
| Reclassified 15-year (site work) | $28,400 |
| Total accelerated reclassification | $129,200 (27.4% of basis) |
| Year-1 deduction (100% bonus) | $129,200 |
| Year-1 federal tax savings (37% bracket) | $47,793 |
| Plus AZ state tax savings (2.5%) | $3,230 |
| Study fee | $895 |
| ROI on study fee | 57.0× |
2. Tempe ASU-Adjacent Fourplex — $1.15M LTR
| Purchase price | $1,150,000 |
| Land allocation (Maricopa Tempe typical) | $276,000 (24.0%) |
| Depreciable basis | $874,000 |
| Reclassified 5-year | $104,880 |
| Reclassified 7-year | $0 |
| Reclassified 15-year | $56,810 |
| Total accelerated reclassification | $161,690 (18.5% of basis) |
| Year-1 deduction (100% bonus) | $161,690 |
| Year-1 federal tax savings (37% bracket) | $59,825 |
| Plus AZ state tax savings (2.5%) | $4,042 |
| Study fee | $1,395 |
| ROI on study fee | 45.8× |
3. Camelback Corridor Office Building — $2.4M commercial
| Purchase price | $2,400,000 |
| Land allocation (Maricopa Camelback typical) | $720,000 (30.0%) |
| Depreciable basis | $1,680,000 |
| Reclassified 5-year | $285,600 |
| Reclassified 7-year | $16,800 |
| Reclassified 15-year | $195,600 |
| Total accelerated reclassification | $498,000 (29.6% of basis) |
| Year-1 deduction (100% bonus) | $498,000 |
| Year-1 federal tax savings (37% bracket) | $184,260 |
| Plus AZ state tax savings (2.5%) | $12,450 |
| Study fee | $1,895 |
| ROI on study fee | 97.2× |
Why Phoenix produces above-national-average cost-seg ROI
- AZ SB1350 STR preemption. Arizona is one of the most STR-friendly states. SB1350 (codified in AZ Rev. Stat. § 9-500.39) preempts cities from banning vacation rentals. Phoenix, Scottsdale, Sedona, and other AZ cities require permits and registration but cannot block STRs entirely. Lower regulatory risk than Nashville Type 2 or Miami Beach restrictions means STR cost-seg outcomes are more durable.
- Snowbird + spring training + Super Bowl 2026 event calendar. Peak STR season Nov–Apr (snowbirds), Cactus League spring training Feb–Mar (15 MLB teams), WM Phoenix Open (largest-attendance golf event), Final Four 2024, Super Bowl LIX 2026. Premium FF&E loadouts compete on event-week and snowbird-season pricing — themed bedrooms, premium kitchens, hot tubs, golf amenities. Old Town Scottsdale FF&E density typically runs $40,000–$70,000 per property.
- Sweet-spot 2010-2024 metro construction era. Downtown Phoenix (Roosevelt, Garfield), Tempe (ASU corridor expansion), Old Town Scottsdale redevelopment, Desert Ridge master-planned community, Camelback corridor commercial — all redeveloped or substantially built 2010–2024. Modern code-current HVAC (critical in 115°F summers), electrical, finishes all classify as 5/7-year property.
- AZ 2.5% flat tax conforms to federal §168(k). Arizona's modest 2.5% flat state income tax conforms to federal bonus depreciation — no decoupling like California. Your federal Year-1 deduction flows through to your AZ return, adding small state-level savings on top of federal 37%. Net combined marginal benefit: ~39.5%.
Arizona tax context
Arizona has a 2.5% flat state income tax (since 2023) — the lowest flat rate among states with income tax. AZ conforms to federal bonus depreciation under §168(k), so the federal Year-1 cost-seg deduction flows through to the AZ return without decoupling math. Net: federal benefit is ~93% of total tax savings; AZ adds ~7%. Property tax in Maricopa County is moderate (effective ~0.7% of full cash value for residential) — separate from federal basis.
Compared to Nashville / Miami / Austin: those have zero state tax, so 100% of cost-seg savings are federal. Phoenix's small AZ tax actually adds a tiny incremental benefit, but the bigger Phoenix advantage is SB1350 STR protection. Compared to California: California decouples from federal §168(k), requiring a parallel state schedule on full straight-line basis — Phoenix is materially better.
AZ SB1350 STR preemption context
Arizona Senate Bill 1350 (2016), codified in AZ Rev. Stat. § 9-500.39, preempts Arizona cities and towns from outright banning or prohibiting short-term and vacation rentals. Cities retain authority to require STR registration, permits, occupancy limits, and basic safety standards. Phoenix, Scottsdale, and Sedona all have STR registration requirements. Subsequent amendments have allowed cities to impose moderate restrictions but the underlying preemption against outright bans remains in place.
For cost segregation purposes: SB1350 does not change federal eligibility (the IRS framework doesn't reference local zoning), but it materially reduces regulatory risk. Compare to Nashville Metro Code Sec. 17.16.250.E or Miami Beach Section 142-905, where local STR bans can force owners to convert to LTR — dropping accelerated reclassification from ~27.5% (STR) to ~18.5% (LTR). Phoenix STR investors face less of this risk because Arizona state law prevents it.
Data license & suggested citation
This page and its underlying dataset are licensed Creative Commons Attribution 4.0 International (CC-BY 4.0).
Cost Seg Smart Research. (2026). Phoenix Cost Segregation Statistics 2026: Year-1 Federal Savings, Reclassification %, and Pricing. https://phoenixcostseg.com/data/phoenix-cost-seg-stats/
For journalists, CPAs, and tax professionals
Need custom Phoenix data slices, additional neighborhood breakdowns, or methodology details for citation? We respond within 1 hour during business hours PT.
- This page is openly citable under CC-BY 4.0 — no permission needed.
- National benchmarks dataset (260 anonymized studies): costsegsmart.com/research/benchmarks-2026/
- National pricing market survey: costsegregationpricing.com
- Customer reviews of cost-seg providers: costsegregationreviews.com
- Other city benchmarks: Nashville, Miami, Austin
Email [email protected] for interview requests, custom data slices, or to verify methodology details.
Frequently asked
What's the typical Year-1 federal tax savings on a $700K Phoenix short-term rental?
Approximately $46,400 federal at a 37% bracket with 100% bonus depreciation under OBBBA (2025+). The math: $700K × 65% (after 35% Old Town Scottsdale land allocation) = $455K depreciable basis × 27.5% accelerated reclassification = $125K reclassified × 100% bonus × 37% = $46,375. Add ~$3,125 in AZ state tax savings at 2.5% for ~$49,500 total.
What's the average land allocation in Phoenix for cost segregation?
18% to 42% depending on neighborhood, per Maricopa County Assessor records. Downtown Phoenix ~26%, Old Town Scottsdale ~35%, Arcadia/Biltmore ~35%, Tempe ~24%, Paradise Valley ~42%, Camelback East ~30%, Desert Ridge ~22%, workforce metro ~18%.
How does Arizona SB1350 affect cost segregation?
Indirectly favorable. SB1350 (2016) preempts AZ cities from outright banning STRs. The federal cost-seg framework doesn't care about local permits, but SB1350 reduces regulatory risk — your STR is less likely to convert involuntarily to LTR (which would drop accelerated reclassification from ~27.5% to ~18.5%). Compare to Nashville Type 2 or Miami Beach restrictions.
Does Arizona's 2.5% state income tax decouple from federal bonus depreciation?
No — Arizona conforms to federal §168(k). The federal Year-1 deduction flows through to your AZ return at the 2.5% flat rate. Total combined marginal benefit: federal 37% + AZ 2.5% = 39.5%. California decouples; Arizona doesn't.
How much does a cost segregation study cost in Phoenix in 2026?
$495 (under $300K), $795 ($300K–$700K), $895 ($700K–$1M), $1,295 ($1M–$2M), $1,595 ($2M–$5M), $1,895 ($5M–$15M) for residential. Multifamily 2–4: $995–$1,995. Commercial: $995–$2,995.
What's the typical accelerated reclassification % for Phoenix properties?
STR ~27.5%, SFR ~18.5%, condo ~14%, MF 2-4 ~19.5%, office ~27.5%, retail ~30.5%. Old Town Scottsdale STRs run upper end; Tempe ASU-adjacent multifamily slightly above SFR baseline.
Does Maricopa County reassessment affect cost segregation?
No. Maricopa County Assessor reassessments affect property tax, not federal IRS basis. Your cost-seg basis is your acquisition cost from the closing disclosure plus capital improvements minus land value — not the assessor's full cash value.
What sources support these statistics?
Engine-truth outputs from the Cost Seg Smart cost segregation engine; Maricopa County Assessor for land allocation; Arizona Department of Revenue for tax conformity context; AZ Rev. Stat. § 9-500.39 (SB1350) for STR ordinance context; BLS Producer Price Index. National calibration dataset (260 anonymized studies) at costsegsmart.com/research/benchmarks-2026/.
Last reviewed: May 12, 2026. Maintained by Cost Seg Smart Research. Data is informational and does not constitute tax or legal advice. Cost segregation outcomes depend on property characteristics, ownership structure, and personal tax situation. Consult a qualified CPA, tax attorney, or enrolled agent before filing. Maricopa County, mcassessor.maricopa.gov, RSMeans, IRS publication titles, and AZ statute references are trademarks/properties of their respective holders. Cost Seg Smart is not affiliated with the Internal Revenue Service.