Cost Segregation Strategy 2025: Maximize Tax Deductions on Rental Properties

Are you a rental property owner looking to reduce your tax liability and heard that cost segregation is the silver bullet you have been missing out on? Well, it's a tricky answer. Cost segregation is often an oversold strategy because it truly is an amazing strategy and it sounds incredibly sexy (at least to us that love to save taxes).

The reality is, that it doesn't work for everyone and it can be a complete waste of time and money. The bottom line is that it's something every investor needs to understand, at least to some degree, and be careful about when entering the conversation. Here's what you need to know.

How does it work?

Cost segregation is the process of splitting up a rental property into its pieces and parts so it can be depreciated faster. It will drive more losses on paper to the taxpayer. For example, a residential rental property (the building, not the land), is depreciated over 27.5 years. However, with cost segregation, a tax advisor can depreciate components of the building in 5, 7, or 15 years, and with the 'bonus depreciation' strategy even accelerate a ton of depreciation and create big write-offs in the current tax year.

Commercial property isn't any different. Under the Modified Accelerated Cost Recovery System (MACRS), a commercial building is typically depreciated over a 39-year period. The personal property components, even land improvements, can be depreciated over shorter periods.

In sum, cost segregation allows property owners to reallocate the costs of a building into shorter tax recovery periods. This results in a reduction of current tax liability and or increased pass-thru tax losses. The question is, can they actually 'use' those losses.

The Process

In order to take advantage of the strategy, it starts with a Cost Segregation Study. It is required by the IRS that this step be completed.

Typically, a cost segregation specialist performs a detailed engineering study of a building's construction, systems, and equipment. However, this is where there is also a lot of misinformation and salesmanship involved. The prices and services can vary dramatically on the type of cost seg study a taxpayer decides to pursue.

The 'Possible' Benefit to Property Owners

Again, the obvious benefit of cost segregation is an increased write-off in a particular year through depreciation. For example, think of a dentist, restaurant owner, landscaper, or corporate employee, that wants to use those losses to write off against their other income and save on their overall tax bill.

However, there's a catch! If you don't qualify under ALL 3 of the following rules a Cost Seg Study is useless if it generates additional pass-thru losses:

• Qualify as a real estate professional under the two tests (see IRC Sec. 469(c)(7)(C))
• Have 'material participation' under one of the seven tests (see IRC 469(h)(1) and Temp. Regs. Sec. 1.469-5T(a))
• Have the appropriate 'basis' in the real estate investment to take the losses (IRC Sec. 465)

If you don't meet these three tests above, you don't get to use those additional 'pass-thru losses' against your other income.

Examples

Example 1: A single taxpayer buys a duplex, sets up an LLC, and owns the project 100%. The taxpayer's 'day job' is that of a project manager at a large computer company receiving a W-2. If they complete a cost-seg study and have additional pass-thru losses, the losses will NOT be a write-off against their other income. This is because they are not a real estate professional.

Result - Cost seg study would be a waste.

Example 2: A married couple buys a duplex. The wife's 'day job' is that of an attorney receiving a W-2. The husband is a contractor and qualifies as a real estate professional and materially participates in the management of the rental. If they complete a cost-seg study and have additional pass-thru losses, the losses WILL BE a direct write-off against any other income AND the wife's W-2.

Result - Cost Seg Study would be beneficial.

Example 3: A single taxpayer buys into a private equity fund. The taxpayer's 'day job' is that of a marketing consultant receiving a W-2. If the fund completes a cost-seg study, those losses on the K-1 will NOT be a write-off against the taxpayer's other income. This is because the taxpayer is not a real estate professional.

Result - Cost Seg Study would be a waste.

Example 4: A married couple buys into a private equity fund. The husband's 'day job' is that of an executive receiving a W-2. The wife is a realtor and qualifies as a real estate professional. However, they don't materially participate in the fund, AND they don't have recourse basis. The losses on the K-1 will NOT be a write-off.

Result - Cost Seg Study would be a waste.

Example 5: A single or married taxpayer invests directly into a short-term rental (think Airbnb) with an LLC and materially participates. The taxpayer may be in luck due to an exception with short-term rentals and a Cost Seg Study might be of use.

Proceed Cautiously

The trick is not getting the 'Study', but being able to USE the losses as an Active Investor or Real Estate Professional. If you can't qualify to use the losses they just carry forward and they are essentially worthless until you sell the asset or investment. Make sure a Cost Seg Study will be to your benefit SO you don't waste your time on it.

Certified as a Tax Advisor By: Mark Kohler

Mark J. Kohler, senior partner at KKOS Lawyers and co-founder of Directed IRA, has over 25 years of experience helping entrepreneurs achieve financial freedom. Through YouTube, books, and live trainings, he breaks down complex strategies into simple, actionable steps. His Main Street Certified Tax Advisor Program now equips CPAs and agents to share these insights with clients.

Disclaimer:

The content provided on this blog is for educational and informational purposes only. It is not intended as legal, tax, or financial advice, and should not be relied upon as such. Laws and regulations vary by jurisdiction and may change over time. Readers are strongly encouraged to consult with a qualified professional—such as a licensed attorney, accountant, or tax advisor—for advice tailored to their specific situation.