Real-World Scenario
Physician at $750K: Backdoor Roth + Short-Term Rental
A dual-income physician household earning $750K maxes out retirement accounts, adds a backdoor Roth, and layers in a short-term rental. Here's how the full stack saves $95K.
The Taxpayer
Income
$750,000 ($550K physician W-2 + $200K spouse W-2)
Filing Status
Married Filing Jointly
State
New York
Orthopedic surgeon employed by a hospital system. Spouse is a marketing director. Both max employer 401(k) plans. Physician has access to a 457(b) deferred comp plan. Purchased an $850K STR in the Poconos, PA. Physician manages the property on weekends and days off, logging 450+ hours annually.
Before
$280,000
Federal: $192K (37% bracket + NIIT $8K + Additional Medicare Tax $4.5K) + New York State: $72K (10.9% top rate + NYC if applicable) + FICA: $16K (employee share above SS wage base)
After
$185,000
Total savings: $95,000
Strategy Breakdown
Cost Segregation + Bonus Depreciation
$32,000Cost seg reclassified $190K of the $850K Poconos property. With 100% bonus depreciation (OBBBA), this generates $190K in accelerated first-year depreciation. At the 37% federal rate: ~$32K. New York DOES conform to federal bonus depreciation, so state savings apply as well (~$6K additional at NY's 10.9% top rate).
IRC §168(k), §168
Material Participation + STR Strategy
$24,000With 450+ hours managing the Poconos STR (more than any other individual) and average guest stays of 3-4 nights, the property is non-passive. The $65K net rental loss offsets W-2 income. Federal savings: ~$24K at 37%. NY state savings: ~$7K at 10.9%.
IRC §469, Reg. §1.469-1T(e)(3)(ii)
Dual 401(k) Max + Employer Match
$16,000Both spouses max their 401(k) at $23,500 each (2026 limit). With employer matches totaling $25K, they shelter $72K from current-year taxes. At the 37% blended rate: ~$16K in tax savings. This is tax deferral (not elimination), but the immediate cash flow impact is real.
IRC §401(k), §415
Backdoor Roth IRA (Both Spouses)
$3,400Both spouses contribute $7,000 to a traditional IRA then immediately convert to Roth. At $750K income, direct Roth contributions are prohibited, but the backdoor conversion is legal. The $14K grows tax-free forever. Estimated tax savings over 20 years at 7% growth: ~$3.4K/year in avoided future taxes. Year-one tax impact: minimal (non-deductible contribution, small taxable gain on conversion).
IRC §408A, §408(d)(2)
457(b) Deferred Compensation
$8,700The physician's hospital offers a governmental 457(b) plan, allowing an additional $23,500 deferral on top of the 401(k). This shelters an extra $23.5K from current taxes. At 37%: ~$8.7K in immediate tax savings. Unlike a 401(k), 457(b) has no 10% early withdrawal penalty before 59.5.
IRC §457(b)
NY SALT Workaround (PTE Tax Election)
$11,000While the physician is W-2, the STR rental income can be structured through an LLC electing NY's Pass-Through Entity Tax (PTE). The PTE pays state tax at the entity level, generating a federal deduction that bypasses the $10K SALT cap. On $100K+ of rental activity: ~$11K in federal savings from the SALT workaround.
NY Tax Law §862, IRC §164(b)(6)
Key Takeaways
- Physicians have unique access to 457(b) plans at hospital systems. This is $23.5K of additional tax-deferred space most high earners don't have.
- Backdoor Roth doesn't save taxes THIS year, but the compounding tax-free growth over a 20-30 year career is worth $200K-$500K in avoided future taxes.
- New York conforms to federal bonus depreciation, unlike California, so NY residents get BOTH federal and state benefits from cost segregation.
- The 450-hour material participation threshold is achievable for physicians who manage their STR on weekends and days off, but it requires discipline and documentation.
- Strategy stacking (401k + 457b + backdoor Roth + STR) is the physician's superpower. Each individually saves $3K-$32K, but together they save $95K.
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Frequently Asked Questions
Can a busy physician realistically log 450+ hours managing an STR?
Yes, but it requires intentional time management. 450 hours across 52 weeks is ~8.6 hours/week. Most physician-STR operators handle: guest communication (via app, 15 min/day), pricing optimization (30 min/week), cleaner coordination (2 hrs/week), maintenance (variable), supply ordering, listing updates, and occasional on-site visits. Weekends and days off are key. A property within 2-3 hours driving distance makes this practical.
What is the difference between a 401(k) and a 457(b)?
Both offer $23,500 in annual pre-tax deferrals (2026). The key differences: (1) 457(b) has no 10% early withdrawal penalty, so you can access funds penalty-free after separation from service at any age, (2) 457(b) contribution limits are SEPARATE from 401(k), so you can max both ($47K total), (3) employer matches in a 401(k) don't count against the 457(b) limit. For physicians planning early retirement or financial independence, the 457(b) is exceptionally powerful.
Is the backdoor Roth still legal in 2026?
Yes. Despite multiple legislative attempts to close the backdoor Roth (Build Back Better, 2024 budget proposals), it remains legal as of 2026. The strategy involves making a non-deductible traditional IRA contribution and immediately converting to Roth. The key risk is the pro-rata rule: if you have existing pre-tax IRA balances, the conversion will be partially taxable. Roll any pre-tax IRA balances into your 401(k) first to avoid this.
Does New York conform to the STR material participation rules?
Yes. New York follows federal passive activity rules under IRC §469. STR losses treated as non-passive federally receive the same treatment on your NY state return. Combined with NY's conformity on bonus depreciation, New York is actually one of the more STR-friendly high-tax states (unlike California, which does not conform on bonus depreciation).
What is the NY Pass-Through Entity Tax workaround?
New York allows eligible pass-through entities (LLCs, S-Corps, partnerships) to elect to pay state income tax at the entity level. This entity-level tax payment is deductible on the federal return as a business expense, bypassing the $10K individual SALT deduction cap. If your STR is held in an LLC, you can elect PTE treatment and effectively deduct your NY state taxes above the $10K cap. Many states now offer similar elections.