Inherited Rental Properties and Cost Segregation: How to Maximize the Stepped-Up Basis

A Hidden Opportunity Most Heirs Completely Miss

Every year, tens of thousands of Americans inherit rental properties from parents, grandparents, and other family members. The baby boomer generation has accumulated enormous real estate wealth over the past four decades, and that wealth is now transferring to the next generation at an accelerating pace. For most heirs, the conversation with their CPA focuses on one question: what do I owe in estate taxes? That is an important question, but it misses a tax planning opportunity that can be worth tens or even hundreds of thousands of dollars in first-year deductions.

When you inherit a rental property, federal tax law resets your cost basis to the fair market value of the property at the date of the original owner's death. This is known as the stepped-up basis, and it is one of the most generous provisions in the entire Internal Revenue Code. Every dollar of depreciation the prior owner claimed over the decades, and every dollar of appreciation the property experienced, vanishes from a tax perspective the moment you inherit it. You start fresh with a new basis equal to what the property was worth on the day it passed to you.

Here is the part most CPAs do not bring up: that fresh, fully stepped-up basis is an ideal foundation for a cost segregation study. If you hold that property for rental income, you can immediately commission an engineering-based cost segregation analysis that reclassifies a significant portion of your new basis into shorter-lived asset categories. Combined with the now-permanent 100% bonus depreciation under the One Big Beautiful Bill Act, this can produce a substantial first-year tax deduction on property you did not pay a dime to acquire.

Understanding the Stepped-Up Basis Under IRC Section 1014

The stepped-up basis rule is found in Internal Revenue Code Section 1014. Under that section, the basis of property acquired from a decedent is generally the fair market value of the property at the date of the decedent's death. If an estate elects to use the alternate valuation date (six months after death, under IRC Section 2032), the basis is the value at that alternate date instead.

What this means in practice is significant. Say your father purchased a rental property in 1985 for $120,000. Over 40 years, he depreciated much of that original cost basis and watched the property appreciate to $750,000 by the time he passed. If he had sold the property, he would have owed capital gains taxes on roughly $630,000 of appreciation, plus depreciation recapture taxes on everything he had written off. That combined tax bill could easily approach $200,000 or more. When you inherit the property under current law, both the appreciation gain and the accumulated depreciation recapture exposure are effectively wiped clean. Your basis is $750,000, and you begin depreciating the property from that new starting point as if it were a fresh acquisition.

The accumulated depreciation your father claimed over 40 years is simply gone from your tax history. You are not responsible for recapturing it. You do not carry it forward. The IRS considers those deductions to have been fully settled at the estate level, and you receive a completely clean slate.

How Depreciation Works on Inherited Property

Once you decide to continue using an inherited property as a rental, you must establish a new depreciation schedule based on your stepped-up basis. Residential rental property depreciates over 27.5 years under MACRS (Modified Accelerated Cost Recovery System) as established by IRC Section 168. Commercial property depreciates over 39 years. You cannot use the prior owner's depreciation schedule, and you cannot simply inherit remaining depreciation life. You start over.

This means that on the $750,000 property from the example above, your standard annual depreciation deduction would be roughly $27,273 per year (allocating the full basis to the building, excluding land value). That is a meaningful deduction, but it is also the minimum version of what is available to you. A cost segregation study can dramatically improve on that number by reclassifying components of the building into 5-year, 7-year, and 15-year property rather than treating the entire structure as one 27.5-year asset.

It is worth noting that you must establish the fair market value of the property at the date of death with reasonable precision. For estate tax purposes, the executor typically orders a formal appraisal. That appraisal also becomes the basis for your new depreciation schedule. If no formal appraisal was done because the estate was below the federal estate tax threshold (currently over $13.6 million for individuals), you will want to obtain a contemporaneous valuation from a qualified appraiser before the tax return for the year of inheritance is filed.

Why Inherited Properties Are Ideal Candidates for Cost Segregation

A cost segregation study works by identifying building components that qualify for accelerated depreciation under IRS asset class rules. The study physically analyzes the property and its construction cost documentation to separate assets that belong in the 5-year category (personal property such as specialized flooring, appliances, cabinetry, and certain electrical and plumbing components), the 7-year category (certain fixtures and equipment), and the 15-year category (land improvements such as parking lots, landscaping, fencing, and outdoor lighting) from the structural components that must remain on the 27.5-year or 39-year schedule.

For inherited properties, this analysis is especially powerful for several reasons. First, the stepped-up basis is typically much higher than the original purchase price. A property your parent bought for $80,000 in 1978 might now have a stepped-up basis of $600,000 or $900,000. The cost segregation study is applied to that full new basis, not the original cost. Every dollar reclassified into a shorter-lived category is a dollar you can deduct much faster than the 27.5-year straight-line schedule would allow.

Second, older properties often have accumulated a rich mix of improvements made over decades. Renovated kitchens, updated bathrooms, new HVAC systems, repaved driveways, replaced windows, and added amenities are all potential candidates for accelerated depreciation. A thorough engineering-based study will identify each of these components at their current contributory value as of the inheritance date, giving you a larger pool of reclassifiable assets than you might expect.

Third, with 100% bonus depreciation now permanently restored under the One Big Beautiful Bill Act (effective for qualifying property acquired after January 19, 2025), every component classified as 5-year, 7-year, or 15-year property can be fully expensed in the first year the property is placed in service as a rental. You do not have to spread those deductions over five or fifteen years. They all hit in year one, dramatically reducing or eliminating your taxable income from that rental in the first year you own it.

A Concrete Example: What the Numbers Look Like

Consider an investor who inherits a single-family rental property with a stepped-up basis of $820,000 at the date of death. The appraiser allocates $100,000 to land, leaving $720,000 as the depreciable basis. Under the standard 27.5-year schedule, the annual depreciation deduction is $26,182. Over the first five years, the total deductions would be about $130,910.

Now suppose the heir orders a cost segregation study. The study identifies the following reclassifications from the $720,000 depreciable basis: $108,000 in 5-year personal property (appliances, specialty flooring, certain electrical systems), $36,000 in 7-year property (certain fixtures), and $72,000 in 15-year land improvements (driveway, landscaping, fencing, exterior lighting). That is $216,000 reclassified into short-life categories, with the remaining $504,000 staying on the 27.5-year schedule.

Under 100% bonus depreciation, all $216,000 in short-life components is deductible in year one. Add the standard $18,327 in year-one straight-line depreciation on the remaining $504,000 building basis, and the total first-year depreciation deduction is approximately $234,327. That is nearly nine times the $26,182 the heir would have received without a cost segregation study. In a 37% marginal tax bracket, that difference in year-one deductions represents over $77,000 in immediate tax savings.

The study itself typically costs $4,000 to $8,000 for a property in this value range. The return on that investment in year one alone is substantial.

The Passive Activity Loss Consideration

Before ordering a cost segregation study on an inherited rental property, it is important to understand how the resulting losses will be treated. Under IRC Section 469, rental activities are generally classified as passive, meaning losses from rental properties can only be used to offset passive income, not ordinary income like wages or business profits.

If you are in the $25,000 passive loss allowance range (adjusted gross income below $100,000), you can deduct up to $25,000 in rental losses against ordinary income annually. That allowance phases out between $100,000 and $150,000 AGI and disappears entirely above $150,000. If your income exceeds that threshold, the large depreciation deductions generated by cost segregation may create suspended passive losses that carry forward to future years, where they can offset future passive income or be released when you eventually sell the property.

There are two important exceptions worth noting. Real estate professional status under IRC Section 469(c)(7) eliminates the passive limitation entirely for qualifying individuals who spend more than 750 hours annually in real estate activities and for whom real estate is their primary professional activity. And if the inherited property qualifies as a short-term rental (average guest stay of seven days or fewer), it may not be classified as a passive activity at all, depending on your level of material participation. Your CPA can help you determine which exception, if any, applies to your situation before you invest in the study.

Joint Tenancy, Community Property, and Partial Step-Ups

Not every inheritance produces a full step-up on the entire basis. The rules depend on how the property was owned before death.

If a married couple held the property as joint tenants with right of survivorship (JTWROS), only the deceased spouse's half of the property receives a step-up. The surviving spouse's original basis in their half remains unchanged. So if the property is worth $800,000 at death and the surviving spouse's original cost basis in their half was $40,000, the new combined basis after death is approximately $440,000: $400,000 (the deceased's half at fair market value) plus $40,000 (the survivor's original half-basis).

In community property states, the rules are more generous. When a spouse dies and the property was community property, both halves of the property receive a step-up to fair market value under IRC Section 1014(b)(6). The surviving spouse ends up with a full stepped-up basis on the entire property, not just half. Community property states include Arizona, California, Idaho, Louisiana, Nevada, New Mexico, Texas, Washington, and Wisconsin. If you inherited property in one of these states, confirm with your CPA how the title was held, because a full step-up on community property can significantly increase the depreciable basis available for cost segregation.

For properties inherited from non-spousal relatives (parents, grandparents, siblings), the entire property typically receives a step-up if the decedent owned it outright. For property held in a trust, the rules depend on the type of trust. Revocable living trusts generally pass the full step-up through to heirs. Irrevocable trusts may not, depending on how they are structured. Always confirm the basis rules with an estate attorney or CPA before commissioning a cost segregation study.

Timing Your Cost Segregation Study After Inheriting

The ideal time to order a cost segregation study on an inherited rental property is as soon as you decide to hold it for rental income, and ideally within the same tax year the property is placed in service as a rental. For bonus depreciation purposes, the qualifying date is when the property is placed in service by you, not when it was placed in service by the decedent. You start fresh, which means the bonus depreciation clock resets.

If the property is placed in service as a rental in 2025 or later, it qualifies for the permanent 100% bonus depreciation under the One Big Beautiful Bill Act, as long as the acquisition date (your inheritance) is also after January 19, 2025. For properties inherited before that date, the rules depend on the effective date of the legislation and any transition rules your CPA identifies, so professional guidance is essential.

Do not wait until you have been renting the property for several years to think about cost segregation. Unlike purchased properties, inherited properties cannot use the IRS look-back method under Form 3115 to retroactively apply cost segregation to prior years, because you do not have a prior depreciation history on the new stepped-up basis to correct. The look-back method applies when you have been depreciating a property under the standard 27.5-year or 39-year schedule and want to catch up on missed accelerated depreciation. On an inherited property, if you simply have not filed a return yet or it is your first year of rental activity, order the study promptly and incorporate the results into your first-year return.

What Happens to Depreciation Recapture When You Eventually Sell

One of the common concerns about cost segregation is depreciation recapture. When you sell a property, the IRS taxes previously claimed depreciation at a recapture rate of up to 25% for real property (Section 1250 unrecaptured gain) and up to ordinary income rates for personal property (Section 1245 recapture). Taking large first-year deductions through cost segregation accelerates those deductions but also builds up a recapture liability that you will owe when you sell.

For inherited properties, this concern is partly offset by a useful planning consideration: your total depreciation exposure is bounded by the stepped-up basis, not by the original purchase price. Because you started with a fresh basis at fair market value, the accumulated depreciation you take over your holding period will be proportionally smaller relative to the value of the property than it was for the original owner. If the property continues to appreciate and you eventually sell for more than the stepped-up basis, only the depreciation you personally claimed (not the original owner's) will be subject to recapture.

Additionally, heirs who plan to hold the property for a long time have several options to manage eventual recapture. A 1031 exchange allows you to defer recapture indefinitely by rolling proceeds into a like-kind replacement property. Holding the property until your own death passes a second step-up to your heirs, extinguishing any recapture liability entirely. These are estate and tax planning decisions worth discussing with your advisor well before you think about selling.

How to Get Started

If you have recently inherited a rental property or are managing an estate that includes rental real estate, the steps to take are straightforward. First, confirm the fair market value as of the date of death, ideally with a formal appraisal. Second, confirm with your CPA how the property was titled and whether you receive a full or partial step-up. Third, determine whether the property will be used for rental income, and if so, when it will be placed in service. Fourth, contact a qualified cost segregation firm to commission an engineering-based study.

A cost segregation study on an inherited property requires the same inputs as any other study: the property address, the depreciable basis (which your CPA can confirm from the appraisal and estate documents), the property type and year of original construction, and any documentation of improvements made over the years. Because the prior owner likely did not retain detailed construction records from decades ago, an experienced cost segregation firm will use on-site inspection, current cost databases, and engineering analysis to estimate the component values with IRS-supportable precision.

Stratum Cost Segregation has experience working with inherited properties and their unique basis considerations. We coordinate directly with your CPA to ensure the study results flow cleanly into your first-year return. Get a free, no-obligation estimate to understand what first-year deductions may be available on your inherited property.