June 2026Education

What Is Depreciation in Commercial Real Estate? A Guide for Hawaii Property Owners

By Benavente Group

Depreciation is one of those words that means different things in different conversations. Your CPA talks about it as a tax deduction. Your appraiser talks about it as a loss in value. Investors mention it as a major reason commercial real estate is attractive.

All three are right. They're just describing different applications of the same broad concept. And if you own commercial property in Hawaii, understanding the distinctions can save real money on taxes, support smarter strategic decisions, and help you read appraisal reports more critically.

Let's break it down: what is depreciation in commercial real estate, how does it work in each context, and what should Hawaii owners and investors understand about it?

The Two Main Contexts for Depreciation

Depreciation in commercial real estate generally refers to one of two distinct things.

Tax depreciation is an accounting deduction that the IRS allows commercial property owners to claim each year, spreading the cost of a building over its useful life. It reduces taxable income without affecting cash flow, which is why it's sometimes called a "phantom expense."

Appraisal depreciation is the loss in value of a building from new construction cost, used in the cost approach to valuation. It captures physical wear, outdated design, and external factors that reduce the building's value.

These two concepts share a name but serve very different purposes. When asking what is depreciation in commercial real estate, the answer depends on whether the conversation is about taxes or valuation.

Tax Depreciation: The Basics

The IRS treats most commercial buildings as having a useful life of 39 years for tax purposes. That means an owner can deduct 1/39th of the building's cost basis each year as depreciation, reducing taxable income from the property.

Importantly, land is not depreciable. Only the building and certain improvements qualify. Allocating the purchase price between land and building matters significantly for tax planning, and that allocation often draws on appraisal input.

The basic method is straight-line depreciation, where the same amount is deducted each year over the recovery period. Commercial properties use this method by default.

When asking what is depreciation in commercial real estate from a tax perspective, this is the foundation. A building purchased with a $5 million depreciable basis generates roughly $128,000 in annual depreciation deductions over 39 years.

Cost Segregation and Accelerated Depreciation

Many commercial owners can accelerate depreciation through cost segregation studies. A cost segregation study identifies components of the building that qualify for shorter depreciation periods (typically 5, 7, or 15 years instead of 39).

Items like specific electrical systems, certain interior finishes, landscaping, parking improvements, and some equipment can often be reclassified, allowing accelerated deduction in the early years of ownership.

The tax savings can be substantial. A cost segregation study on a typical commercial property might reclassify 15 to 30 percent of the cost basis into shorter depreciation buckets, generating significantly larger early-year deductions.

When evaluating what is depreciation in commercial real estate for tax planning, cost segregation is often the most consequential tool available beyond standard straight-line depreciation.

Depreciation Doesn't Equal Value Loss

This is the part that trips owners up. Tax depreciation reduces the property's tax basis over time, but it has nothing to do with the property's market value.

A property can be fully depreciated for tax purposes yet still be worth more than the original purchase price. Market value reflects what the property would sell for today, not the IRS's accounting schedule.

This distinction matters at sale time. When a depreciated property sells for more than its remaining tax basis, the gain is partially recaptured at the depreciation recapture rate (typically 25 percent for commercial real estate), which can be a meaningful tax hit if not planned for.

Appraisal Depreciation: A Different Concept Entirely

In valuation, particularly in the cost approach, depreciation refers to the loss in value of a building from its cost new. It captures three distinct elements.

Physical deterioration is wear and tear. An older building with deferred maintenance, aging systems, and visible wear has more physical depreciation than a well-maintained newer building.

Functional obsolescence is a loss in value from outdated design or features. A warehouse with low clear heights, an office with an inefficient floor plate, or a retail building with poor visibility all suffer functional obsolescence even if physically sound.

External obsolescence is a loss in value from factors outside the property. A neighborhood declining in desirability, a major highway built nearby, or a change in zoning that affects surrounding properties can all contribute.

In the cost approach, the appraiser estimates what it would cost to build the property new, subtracts depreciation across all three categories, and adds land value to arrive at an indicated value.

This is the other answer to what is depreciation in commercial real estate: in valuation, it's a loss in value from what new construction would cost, captured carefully across multiple dimensions.

How the Two Definitions Interact

Tax depreciation and appraisal depreciation don't directly affect each other, but they intersect in practice.

The land-versus-building allocation that drives tax depreciation often draws on appraisal input. A higher building-to-land ratio creates more depreciable basis and more tax deduction. Allocations need to be defensible.

When properties sell, the appraisal informs both the new owner's depreciation basis and the seller's recapture calculation.

In cost segregation studies, engineering analysis identifies building components, but the cost basis being segregated comes from the property's appraised allocation between land and building.

Understanding what is depreciation in commercial real estate in both contexts helps owners coordinate tax planning with valuation strategy.

Why Hawaii Depreciation Considerations Are Distinct

Hawaii adds some specific considerations.

High construction costs mean Hawaii buildings often have higher depreciable bases than mainland equivalents. The annual depreciation deduction on a Hawaii commercial property can be meaningfully larger than on a similar-sized mainland property purchased for less.

Special-use property prevalence. Hotels, marinas, and other operating-business-tied properties common in Hawaii often have more components that qualify for cost segregation, making accelerated depreciation analysis especially valuable.

Leasehold and fee simple structures complicate depreciation. Leasehold improvements have their own depreciation rules, and the timing of lease tails and reversions affects how those improvements are recovered.

Elevated physical depreciation factors. Salt-air corrosion, hurricane exposure, and tropical climate accelerate physical deterioration on Hawaii buildings compared to mainland properties, which affects appraisal depreciation in the cost approach.

For these reasons, what is depreciation in commercial real estate in Hawaii practically means working with both a CPA who understands real estate tax planning and an appraiser who understands local construction and market dynamics.

What Owners Should Do

A few practical takeaways.

Get a defensible land-building allocation. This drives your depreciable basis and your annual tax deduction. A credible appraisal supports a defensible allocation.

Consider a cost segregation study. For properties of meaningful size, the tax savings often justify the study cost many times over.

Plan for recapture. When you sell, depreciation recapture is a real tax cost. Strategies like 1031 exchanges can defer recapture, but only with planning.

Read appraisals with depreciation in mind. When the cost approach is part of your appraisal, scrutinise how the appraiser quantified physical, functional, and external depreciation. These judgments significantly affect the value conclusion.

The Bottom Line

So, what is depreciation in commercial real estate? It's two related but distinct concepts: a tax accounting deduction that lets owners recover the cost of a building over 39 years (and faster components through cost segregation), and a valuation adjustment in the cost approach that captures physical, functional, and external loss in value.

For Hawaii commercial property owners, both versions of depreciation carry meaningful financial implications. Tax depreciation can produce substantial annual savings, especially with cost segregation. Appraisal depreciation feeds directly into how your property is valued in cost-approach analyses.

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