Short-term rentals (STRs) continue to grow in popularity, offering strong cash flow potential and flexible ownership models for real estate investors. But many STR owners are still missing out on one of the most effective ways to reduce taxable income: cost segregation. Cost segregation allows STR owners to accelerate depreciation deductions, front-load expenses into the first few years of ownership, and significantly improve the after-tax return on investment. Even as bonus depreciation phases down, this strategy remains one of the most valuable tools in a real estate investor’s tax planning toolkit. 
Why Cost Segregation Works for STRs
Under IRS rules, cost segregation allows certain components of a building to be depreciated over shorter recovery periods than the standard straight-line method.
A cost segregation study breaks down the building into asset categories such as:
- 5-year property – Flooring, cabinetry, appliances, some furniture and specialty equipment.
- 7-year property – Some furniture, and communications equipment.
- 15-year property – Site improvements such as paving, decks, or landscaping
By identifying these assets and depreciating them faster, owners can shift a large portion of their depreciation into the early years when they may need it most to offset income or reinvest in their portfolio. 
STRs Are Treated as Non-Residential Real Property (39-Year Depreciation)
Unlike traditional long-term rentals, STRs typically involve guest stays of fewer than 30 days. Due to this transient use, the IRS considers STRs to be non-residential real property, which means the main structure must be depreciated over 39 years, not 27.5. This longer depreciation timeline makes cost segregation even more valuable. Without it, deductions are spread thin over nearly four decades. With it, significant components can be depreciated over just 5, 7, or 15 years, delivering a major cash flow advantage.
The Power of Front-Loading Deductions
Accelerated depreciation allows STR investors to take more of their deductions in the early years of ownership, often when cash flow is tight or capital is needed for improvements and reinvestment. For a property placed in-service under the OBBB, the first year bonus depreciation is 100%. For properties placed in-service before 1/20/25, the first year bonus depreciation is either 60%, 80%, or 100% depending on the in-service year.
- MACRS depreciation on the remaining asset basis
By front-loading these deductions, you reduce taxable income in the first year and improve cash-on-cash returns.
Illustrative Case Example: Accelerated Depreciation in Action
Let’s say an investor purchases a short-term rental property for $525,000, with $450,000 allocated to the building.
After performing a cost segregation study, the following is identified:
- $95,000 in 5-year personal property
- $25,000 in 15-year land improvements
- $330,000 in 39-year structural assets
With 80% bonus depreciation in 2024, the investor can deduct:
- $76,000 in bonus depreciation
- ~$20,000 in first-year MACRS depreciation
- ~$96,000 in total year-one depreciation
Without cost segregation, the entire building would have depreciated at roughly $11,500 per year over 39 years. With it, the investor unlocks nearly 7x the first-year deduction, creating valuable tax deferral and freeing up capital early in the investment cycle.
What If You Already Own an STR?
If you already placed a property in service but didn’t complete a cost segregation study, it’s not too late. The IRS allows property owners to retroactively apply cost segregation using Form 3115 (Change in Accounting Method).
This allows you to:
- Claim all previously missed depreciation in a single year
- Avoid amending prior tax returns
- Realize the full tax benefit now
This strategy is especially valuable for properties placed in service during 2021–2023, when bonus depreciation was higher.
Final Thoughts
Cost segregation is one of the most effective ways for STR investors to improve after-tax cash flow and maximize the value of their property, especially in a rising interest rate environment or as bonus depreciation phases out. If you own or plan to acquire an STR, a cost segregation study may help you accelerate your deductions, improve your ROI, and build long-term tax efficiency into your investment.
Request a free benefit analysis
Our team will estimate your potential tax savings and help you determine if cost segregation is the right fit for your short-term rental.
