When investors sell appreciated assets and own depreciable real estate in the same year, the order in which deductions apply matters. Understanding how depreciation deductions from a cost segregation study offset different types of income helps you decide when to take them.

Here’s the core point: when depreciation is usable against both, it reduces ordinary income before capital gains, because capital gains are taxed on top of ordinary income. That only holds if the losses aren’t limited by the passive activity rules (see below).

The Hierarchy of Tax Offsets: What Gets Reduced First

For real estate investors, the order of operations for tax deductions affects how much a deduction is worth.

Question: If you have both ordinary income and capital gains in the same year, which does cost segregation depreciation offset first?

Answer: Ordinary income is offset first, then capital gains, provided the losses are nonpassive, or the gains are passive (such as gain on selling another rental).

That ordering can lower your tax when both types of income occur in the same year.

How It Works: A Simplified Example

Consider this scenario:

• $300,000 in ordinary income (37% tax bracket)
• $600,000 in capital gains (20% tax bracket)
• $500,000 in potential depreciation from a cost segregation study

This example applies flat rates to keep the math simple. Actual brackets are progressive, so real savings will be lower. It also assumes the depreciation isn’t limited by the passive activity rules.

Without Cost Segregation

• Tax on $300,000 ordinary income (37%): $111,000
• Tax on $600,000 capital gains (20%): $120,000

Total tax: $231,000

With Cost Segregation

• Ordinary income reduced to $0 ($300,000 – $300,000 depreciation)
• Remaining $200,000 of depreciation offsets capital gains
• Taxable capital gains: $400,000 ($600,000 – $200,000)
• Tax on ordinary income: $0
• Tax on remaining capital gains (20%): $80,000

Total tax: $80,000

Tax savings: $151,000

Because the depreciation absorbs income taxed at 37% before income taxed at 20%, it saves more than it would against capital gains alone. In this simplified example, the same $500,000 applied only to capital gains would save $100,000.

The Strategic Decision: Model Depreciation Timing and Loss Carryforwards

While the example above shows using the full $500,000 of depreciation in the current year, planning across tax years requires distinguishing between depreciation elections and loss carryforwards. You cannot simply choose to claim less allowable depreciation and save the unclaimed amount for later.

Valid elections, such as electing out of bonus depreciation or electing the alternative depreciation system (ADS), can change the timing of deductions. Separately, if you claim the full deduction but cannot use the resulting loss this year, it generally carries forward as suspended passive activity losses or as a net operating loss, subject to the applicable limitation rules. A carryforward is not an unrestricted choice to defer an otherwise usable deduction.

Model these considerations with your CPA:

• Income forecast: Will you have significant ordinary income next year?
• Tax rate expectations: Do you anticipate higher or lower tax rates in the future?
• Future capital transactions: Are you planning additional property sales that will generate capital gains?
• Loss limitations: How much of the deduction can you actually use this year, and what rules apply to any carryforward?

The Math Behind the Strategy

The value comes from the tax rate differential:

• Depreciation offsetting ordinary income saves up to 37¢ on the dollar
• Depreciation offsetting capital gains saves up to 20¢ on the dollar

When you have both types of income, depreciation that offsets the highest-taxed income first is worth more per dollar.

Implementation Considerations

To execute this strategy effectively:

1. Timing
   Coordinate the completion of your cost segregation study with the year you expect capital gains, so the deductions land in the year you need them.
2. Consider Electing Out of Bonus Depreciation
   You can't simply claim less depreciation than the law allows. Your basis is reduced by the depreciation allowable under the method and elections you use, whether or not you actually claim it.
   
   What you can do is change the timing through elections. Under §168(k)(7), you can elect out of bonus depreciation for an entire class of property (for example, all 5-year property) placed in service that year. You can also elect the alternative depreciation system (ADS) under §168(g)(7), which applies to a whole class of personal property but can be made property by property for buildings. Neither election lets you pick an exact dollar deduction. Both shift deductions from the first year into later years, and both are generally irrevocable, so model them with your CPA before filing.
   
   If you take the full deduction and can't use it all this year, the excess isn't lost. It generally carries forward, either as suspended passive activity losses or as a net operating loss, subject to the usual limitation rules.
3. Plan Across Multiple Tax Years
   If you know you’ll have significant ordinary income in the next 2–3 years, a multi-year tax projection can help compare the timing effects of available elections and the use of any loss carryforwards. It does not let you allocate an arbitrary dollar amount of depreciation to each year.
4. Be Mindful of Passive Activity Limitations
   Rental losses are generally passive under IRC §469 and can’t offset W-2 income, business income, or portfolio gains such as stock sales, unless you qualify as a real estate professional (or meet the short-term rental exception) and materially participate. Gain from selling another passive rental property is passive and can absorb them.

Real Estate Professional Status

The strategy applies much more broadly if you qualify as a Real Estate Professional under IRC §469(c)(7) and materially participate. With this status, real estate depreciation can offset nonpassive income, subject to the excess business loss limit.

For high-income professionals who meet the Real Estate Professional requirements — 750+ hours and more than half of your personal services in real estate — pairing cost segregation with the year capital gains are realized is a common planning approach.

Avoiding Common Mistakes

Be aware of these pitfalls when implementing this strategy:

• Excess Business Loss Limit: Nonpassive losses above the annual threshold carry forward as a net operating loss rather than offsetting income this year.
• Alternative Minimum Tax (AMT): Bonus depreciation itself isn’t an AMT adjustment, but large deductions can still interact with AMT in some cases. Confirm with your CPA.
• State Tax Considerations: Some states don’t follow federal depreciation rules.
• Recapture Exposure: Accelerated depreciation creates recapture exposure upon sale.
• Documentation Requirements: Ensure your cost segregation study is properly documented for potential IRS scrutiny.

The Bottom Line

When you have both ordinary income and capital gains in the same year, and the losses aren’t limited by the passive activity rules, cost segregation depreciation offsets your highest-taxed income first.

For investors facing significant capital gains, timing accelerated depreciation to the year of the gain is worth modeling with your CPA before you file.

Need help with your specific situation? Contact R.E. Cost Seg for an analysis of what a study would produce in the year you need it.