Cost Segregation Savings by State: How State Taxes Change Your ROI in 2026
A comprehensive state-by-state analysis showing how state income tax rates and bonus depreciation conformity dramatically change your cost segregation ROI.
Matthew Gigantelli
Lead Cost Seg Engineer · ASCSP M009-25
When I run cost segregation estimates for investors, the single most overlooked variable is state income tax. An investor in Texas and an investor in California can own identical $500K properties and receive dramatically different total savings — not because the engineering is different, but because California's 13.3% top rate adds roughly $12,787 in additional tax benefit that the Texas investor does not receive. Across 1,000+ studies, I have seen state taxes swing total savings by 15-36% in either direction. Yet most cost segregation calculators and provider proposals show only federal savings, leaving investors in high-tax states unaware of how much more they stand to gain — and investors in no-tax states with inflated expectations from seeing other investors' results.
This article provides the comprehensive state-by-state analysis I wish every investor had before commissioning a study. I cover how state tax rates affect savings, which states conform to federal bonus depreciation (and which do not), and a detailed comparison table for the top 15 states by real estate investment volume.
In This Guide
- Why State Taxes Matter for Cost Segregation
- The 4 State Tiers: From Zero Tax to Non-Conforming
- Top 15 States: Savings Comparison Table
- California Deep Dive: The Non-Conformity Problem
- No-Income-Tax States: Federal-Only Math
- Full Conformity States: The Best of Both Worlds
- Multi-State Investors: Where You File Matters
- Find Your State's Specific Analysis
Why State Taxes Matter for Cost Segregation
Cost segregation accelerates depreciation deductions. Those deductions reduce taxable income. Your taxable income is subject to both federal and state income tax. Therefore, every dollar of accelerated depreciation saves you money at your combined marginal rate — not just the federal rate.
The math is straightforward but the impact is substantial:
Combined Savings Formula
Total Savings = Accelerated Depreciation × (Federal Rate + Effective State Rate)
On a $500K property with $96,000 in accelerated depreciation:
Texas (0% state): $96,000 × 37% = $35,520
California (13.3% state): $96,000 × 50.3% = $48,288
Difference: $12,768 — a 36% increase in savings
But there is a critical complication: not all states treat the accelerated depreciation the same way at the state level. Some states fully conform to federal bonus depreciation rules, meaning you get the entire state tax benefit in year one. Others decouple from bonus depreciation, meaning the state-level benefit is spread over the MACRS recovery periods (5 and 15 years). And some states have unique rules that fall somewhere in between.
The 4 State Tiers: From Zero Tax to Non-Conforming
Tier 1: Zero Income Tax States
States: Alaska, Florida, Nevada, New Hampshire*, South Dakota, Tennessee*, Texas, Washington, Wyoming
*New Hampshire taxes interest/dividends only. Tennessee phased out its Hall Tax on investment income.
These states have no individual income tax on earned or investment income. Cost segregation savings come entirely from federal tax reduction. The benefit is still substantial — a $500K property saves $35,520 at a 37% federal rate — but there is no state-level multiplier. Investors in these states should benchmark their ROI against the federal-only numbers.
Tier 2: Full Conformity States
These states follow federal bonus depreciation rules at the state level
Investors in full conformity states get the maximum combined benefit: federal bonus depreciation PLUS state-level bonus depreciation, both in year one. This is the best-case scenario for cost segregation ROI.
Examples include: Arizona, Colorado, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Michigan, Missouri, Montana, Nebraska, New Mexico, North Dakota, Oklahoma, South Carolina, Utah, and West Virginia. Conformity status can change with state legislative sessions — always verify current status with your CPA.
Tier 3: Partial Conformity States
These states partially follow federal rules with modifications
Some states conform to a specific percentage of bonus depreciation (e.g., 80% instead of 100%), conform with a cap on the deduction amount, or conform to a prior version of the federal code. The state-level benefit exists but is reduced compared to full conformity states.
Examples include: Connecticut (partial add-back), Georgia (follows federal with modifications), Hawaii (conforms with some exceptions), Maine, Maryland, Massachusetts, Minnesota, Ohio, Oregon, Rhode Island, Virginia, and Wisconsin. The specifics vary significantly — consult your CPA for your state's current rules.
Tier 4: Non-Conforming States
These states decouple from federal bonus depreciation entirely
Investors in non-conforming states must add back the federal bonus depreciation on their state return and instead use standard MACRS depreciation schedules (without bonus) for state tax purposes. You still get the full federal bonus depreciation benefit. And you still get accelerated MACRS depreciation at the state level (5-year and 15-year schedules are faster than 27.5 or 39 years). You just do not get the state-level bonus in year one.
Major non-conforming states: California, New York, New Jersey, Pennsylvania, Arkansas, Mississippi. These include some of the highest-tax and highest-investment-volume states in the country.
Critical Distinction
Non-conformity does NOT mean you lose the state tax benefit entirely. It means the state-level benefit is spread over time rather than taken in year one. On a $500K property in California, you still save approximately $12,787 in state taxes from cost segregation — but that savings comes over 5-15 years via MACRS rather than all in year one via bonus. The total lifetime benefit is similar; the timing is different.
Top 15 States: Savings Comparison Table
This table shows the combined federal + state cost segregation savings for the 15 states with the highest real estate investment volume. I have calculated savings on both a $500K and $1M property using standard assumptions: 80% building ratio, 24% reclassification (the median from our 8,000+ study benchmarks), 37% federal rate, and 100% federal bonus depreciation.
| State | Top Rate | Conformity | $500K Savings (Yr 1) | $1M Savings (Yr 1) | vs. Federal Only |
|---|---|---|---|---|---|
| California | 13.3% | None | $35,520* | $71,040* | +$12,787 over time† |
| Texas | 0% | N/A | $35,520 | $71,040 | — |
| Florida | 0% | N/A | $35,520 | $71,040 | — |
| New York | 10.9% | None | $35,520* | $71,040* | +$10,464 over time† |
| New Jersey | 10.75% | None | $35,520* | $71,040* | +$10,320 over time† |
| Illinois | 4.95% | Full | $40,272 | $80,544 | +13.4% |
| Arizona | 2.5% | Full | $37,920 | $75,840 | +6.8% |
| Colorado | 4.4% | Full | $39,744 | $79,488 | +11.9% |
| Georgia | 5.49% | Partial | $40,790 | $81,581 | +14.8% |
| North Carolina | 4.5% | Full | $39,840 | $79,680 | +12.2% |
| Tennessee | 0% | N/A | $35,520 | $71,040 | — |
| Washington | 0% | N/A | $35,520 | $71,040 | — |
| Indiana | 3.05% | Full | $38,448 | $76,896 | +8.2% |
| Nevada | 0% | N/A | $35,520 | $71,040 | — |
| Ohio | 3.5% | Partial | $38,880 | $77,760 | +9.5% |
*Year-1 federal savings only; state savings accrue over MACRS schedules due to non-conformity. †Total additional state savings over the MACRS recovery period. Assumptions: 80% building ratio, 24% reclassification, 37% federal rate, 100% federal bonus depreciation, top state marginal rate. State tax rates as of January 2026. Verify current rates with your CPA.
California Deep Dive: The Non-Conformity Problem
California deserves special attention because it combines the highest state income tax rate in the country (13.3% top bracket) with complete non-conformity to federal bonus depreciation. This creates a unique and often misunderstood situation for California real estate investors.
What California non-conformity means in practice
When you file your federal return, you claim 100% bonus depreciation on the accelerated portion of your cost segregation study. On a $500K property, that is $96,000 in year-one federal deductions, saving $35,520 at a 37% rate.
When you file your California return (Form 540), you must add back the federal bonus depreciation and instead use standard MACRS depreciation schedules. For 5-year property, MACRS allows 20% in year one (without bonus). For 15-year property, MACRS allows 5% in year one.
| Component | Federal (Year 1) | California (Year 1) | California (Lifetime) |
|---|---|---|---|
| 5-year property ($64,000) | $64,000 (100% bonus) | $12,800 (20% MACRS yr 1) | $64,000 (over 5 years) |
| 15-year property ($32,000) | $32,000 (100% bonus) | $1,600 (5% MACRS yr 1) | $32,000 (over 15 years) |
| Total accelerated | $96,000 | $14,400 | $96,000 |
| Tax savings | $35,520 (yr 1) | $1,915 (yr 1) | $12,768 (total) |
Based on $500K property, 80% building ratio, 24% reclassification (2/3 to 5-year, 1/3 to 15-year), 13.3% California top rate.
The California Bottom Line
California investors still benefit significantly from cost segregation. The federal savings are identical to any other state ($35,520 on a $500K property). The state-level savings of $12,768 are real — they are just spread over time rather than concentrated in year one. The combined lifetime benefit is approximately $48,288, making the ROI on an $1,800 study approximately 26.8x on a lifetime basis. Do not let non-conformity scare you away from cost segregation in California.
Related: 6 California-Only Tax Credits & Strategies to Offset High State Taxes (Overline)
New York and New Jersey: Same pattern, different numbers
New York (10.9% top rate, plus NYC's additional 3.876% for city residents) and New Jersey (10.75% top rate) follow the same non-conformity pattern as California. Federal bonus depreciation is fully available. State-level bonus is not — but accelerated MACRS schedules still apply at the state level, generating meaningful savings over the recovery period.
For a New York City investor at the combined 51.8% rate (37% federal + 10.9% state + 3.876% city), the total lifetime cost segregation savings on a $500K property reach approximately $49,728 — the highest combined rate in the country. Even with non-conformity spreading the state/city portion over time, the year-one federal savings alone produce a 19.7x ROI on an $1,800 study.
No-Income-Tax States: Federal-Only Math
Nine states have no individual income tax: Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming. For investors in these states, cost segregation savings come entirely from federal tax reduction.
| Property Value | Accelerated (24%) | Savings @ 37% | Savings @ 35% | Savings @ 32% | ROI @ $1,800 |
|---|---|---|---|---|---|
| $300,000 | $57,600 | $21,312 | $20,160 | $18,432 | 10.2x–11.8x |
| $500,000 | $96,000 | $35,520 | $33,600 | $30,720 | 17.1x–19.7x |
| $750,000 | $144,000 | $53,280 | $50,400 | $46,080 | 25.6x–29.6x |
| $1,000,000 | $192,000 | $71,040 | $67,200 | $61,440 | 34.1x–39.5x |
No-Tax State Takeaway
Even without any state tax benefit, cost segregation delivers 10x-40x ROI at modern pricing. The federal benefit alone is more than sufficient to justify the study. If you are in Texas, Florida, or another no-tax state and someone tells you cost segregation "doesn't save as much" — they are comparing you to a California investor, not to the alternative of not doing cost segregation at all. The comparison that matters is: $35,520 in savings vs. $0 in savings.
Full Conformity States: The Best of Both Worlds
Investors in full conformity states with meaningful income tax rates get the highest year-one combined savings. Here are the top full-conformity states ranked by combined year-one savings on a $500K property:
| State | Top State Rate | Combined Rate | Year-1 Savings ($500K) | Year-1 Savings ($1M) | ROI @ $1,800 |
|---|---|---|---|---|---|
| Oregon | 9.9% | 46.9% | $45,024 | $90,048 | 25.0x |
| Montana | 6.75% | 43.75% | $42,000 | $84,000 | 23.3x |
| South Carolina | 6.4% | 43.4% | $41,664 | $83,328 | 23.1x |
| Idaho | 5.8% | 42.8% | $41,088 | $82,176 | 22.8x |
| Kansas | 5.7% | 42.7% | $40,992 | $81,984 | 22.8x |
| Nebraska | 5.58% | 42.58% | $40,877 | $81,754 | 22.7x |
| Illinois | 4.95% | 41.95% | $40,272 | $80,544 | 22.4x |
| Colorado | 4.4% | 41.4% | $39,744 | $79,488 | 22.1x |
Oregon stands out as the highest-ROI full-conformity state. With a 9.9% top rate and full bonus depreciation conformity, Oregon investors see 27% more savings than investors in no-tax states on the same property. On a $1M property, that is an additional $19,008 in year-one savings — nearly enough to buy another cost segregation study on a second property.
Multi-State Investors: Where You File Matters
If you own rental properties in multiple states, each property's state tax treatment is determined by the state where the property is located — not where you live. A California resident who owns a rental in Texas gets the federal benefit on the Texas property but no state tax benefit (because Texas has no income tax). The same investor's California rental generates both federal and California state benefits (though California's non-conformity spreads the state benefit over time).
Multi-State Strategy Tip
If you are choosing between properties in different states and all else is equal, properties in high-tax full-conformity states generate the highest combined year-one savings from cost segregation. An Oregon property produces 27% more year-one savings than an identical Texas property. This should not be the primary driver of your investment decision — but it is a meaningful factor in your after-tax return analysis.
Residency vs. property location
Your state of residency determines your personal income tax obligations, but rental income is generally taxed by the state where the property is located. Some states also require non-resident filing if you earn income from property in their state. This creates situations where you may file in multiple states — and the cost segregation benefit at the state level applies differently in each one. Work with a CPA who understands multi-state filing to optimize your cost segregation strategy across your portfolio.
Find Your State's Specific Analysis
We have created detailed cost segregation guides for every state, covering state-specific tax rates, conformity status, savings calculations, and local market considerations. Visit our state-by-state cost segregation hub to find your state's specific analysis.
Key Takeaways by Investor Type
High-Tax State Investor (CA, NY, NJ)
Your total lifetime savings are 25-36% higher than no-tax state investors. Non-conformity means the state portion is spread over time, but the total benefit is substantial. Do not let non-conformity discourage you — it affects timing, not total value. Federal savings alone justify the study.
Full Conformity State Investor (OR, IL, CO)
You get the best of both worlds: full federal bonus depreciation PLUS full state-level bonus in year one. Your year-one combined savings are the highest of any investor type. Prioritize cost segregation — the ROI is exceptional.
No-Tax State Investor (TX, FL, NV, WA)
Your savings are federal-only, but the federal benefit alone produces 10x-40x ROI at modern pricing. You are not "missing out" — you are simply not getting the additional state multiplier. The strategy is still overwhelmingly positive.
Multi-State Portfolio Investor
Each property's state benefit is determined by the property's location. Analyze each property individually. Consider the state tax benefit as one factor in your portfolio allocation strategy. Our free calculator accounts for state-specific rates.
Calculate Your State-Specific Savings
Our free calculator factors in your state tax rate and conformity status to give you accurate combined federal + state savings. See your exact number in 60 seconds.
Related Reading
- Cost Segregation by State Hub — Individual state guides with local market data
- How to Calculate Your Cost Segregation ROI — The 5-variable formula with worked examples
- What Should a Cost Segregation Study Actually Cost? — Full pricing transparency report
- Cost Segregation Benchmarks: What 8,000+ Studies Reveal — The benchmark data behind the 24% figure
- Cost Segregation for Properties Under $500K — Complete guide for smaller properties
- Overline: Cost Segregation Pricing by State: Why Location Should Not Affect Your Study Cost
- Overline: 6 California-Only Tax Credits & Strategies to Offset High State Taxes
- Overline: Tennessee Cost Segregation & STR Tax Guide
- Overline: The Florida LLC Trap: How Asset Protection Triggers a Massive Property Tax Reassessment
Disclaimer: State tax rates, bonus depreciation conformity status, and filing requirements in this article reflect publicly available information as of April 2, 2026. State tax laws change frequently through legislative action — always verify current rates and conformity status with your CPA or state tax authority before making tax decisions. Savings calculations assume 100% federal bonus depreciation under current law, an 80% building-to-land ratio, 24% reclassification, and stated marginal tax rates. Actual results depend on property type, location, construction, individual tax circumstances, and applicable state rules. This information is provided for educational purposes and does not constitute tax, legal, or financial advice. Consult qualified professionals regarding your specific situation.