Commercial Real Estate Depreciation Calculator: Estimate Your Tax Savings in Minutes

A commercial property can throw off positive cash flow and still show a taxable loss. That’s the power of depreciation. With commercial real estate depreciation, investors can deduct part of a building’s cost each year, even though no new cash leaves the account.

This “paper” deduction is one of the biggest tax benefits in CRE because it can shelter real rental income and support stronger after-tax cash flow. Use the commercial real estate depreciation calculator below to estimate your annual deduction, first-year depreciation, accumulated depreciation, and potential tax savings instantly.

Important: The calculator shows estimates only. Confirm your depreciation schedule and tax treatment with your tax professional.

Using the Commercial Real Estate Depreciation Calculator

Use the calculator to run your own numbers before you: 

• Buy
• Refinance
• Renovate
• Sell

Enter the property type first: commercial defaults to 39 years, while residential rental uses 27.5 years. Then add the purchase price, closing costs, land value, capital improvements, service start date, and marginal tax rate.

The tool estimates your: 

• Cost basis
• Annual depreciation
• First-year depreciation
• Accumulated depreciation to date
• Estimated annual tax savings

It should also generate a downloadable depreciation schedule you can use as a planning document.

Treat the result as a decision-support estimate. Depreciation can change with entity structure, prior ownership, improvements, state rules, and elections. A CPA should confirm the final schedule before you claim the deduction.

What Is Commercial Real Estate Depreciation?

The “wear and tear” tax deduction

Commercial real estate depreciation is the annual tax deduction owners take for the gradual wear and tear of an income-producing building. The IRS lets investors recover the cost of business or income-producing property through depreciation deductions over time.

The important part here is that depreciation doesn’t require a new cash expense each year. You already bought the property. The deduction lowers taxable income anyway, which is why real estate depreciation can improve after-tax cash flow. 

Just remember that you depreciate the building, not the land. Land doesn’t wear out in the same way.

39 years vs. 27.5 years: Commercial vs. residential

• Commercial properties generally use a 39-year recovery period under MACRS
• Residential rental property generally uses 27.5 years

Both are usually depreciated on a straight-line basis, meaning the deduction is spread evenly across the useful life.

That longer 39-year schedule is something to keep in mind. A commercial building creates a smaller annual deduction than a residential rental with the same depreciable basis. For investors, that’s exactly why cost segregation and bonus depreciation can become so valuable. They may move certain components out of the 39-year bucket and into shorter recovery periods.

How to Calculate Commercial Property Depreciation

Step 1. Determine your cost basis

Start with the amount you can actually depreciate. For most investors, that means the purchase price plus certain acquisition costs and capital improvements, minus the value of the land.

Say you buy a property for $1,200,000, allocate $200,000 to land, pay $30,000 in eligible closing costs, and add $70,000 in capital improvements. Your depreciable basis is $1,100,000. 

Routine repairs are different. A roof replacement may be capitalized, while fixing a small leak may not be.

Step 2. Subtract the value of the land

This is the input investors fumble pretty often. Land is not depreciable, so you need to carve it out before calculating property depreciation. You can use an appraisal, purchase allocation, or a tax-assessor ratio as the basis, then confirm the method with your CPA.

A piece of advice: Don’t force the land value too low just to create a bigger deduction. This can make the calculation look aggressive and may invite scrutiny.

Step 3. Apply straight-line depreciation over the recovery period

Once you have the depreciable basis, divide it by the useful life.

For a commercial property with a $1,000,000 depreciable basis:

$1,000,000 ÷ 39 = $25,641 per year

For comparison, a residential rental with the same basis would be:

$1,000,000 ÷ 27.5 = $36,364 per year

This difference is why commercial owners often look beyond the basic straight-line depreciation schedule. Since the 39-year schedule spreads deductions so slowly, many commercial owners use cost segregation to identify shorter-life components and accelerate part of the tax benefit.

First-year depreciation & the mid-month convention

You usually don’t get a full year of depreciation in the first year unless the property is placed in service at the right time. Real property uses the mid-month convention, which treats property as placed in service or disposed of at the midpoint of the month.

For example, if you place a commercial property in service in May, the first-year deduction is prorated. You don’t take a clean 12 months of depreciation. The calculator handles that timing automatically, so your first-year number is closer to the actual allowable depreciation.

Advanced Tax Strategies: Cost Segregation & Bonus Depreciation

Accelerate deductions with a cost segregation study

A cost segregation study breaks a building into components rather than treating the entire property as one 39-year asset. Certain items may qualify as 5-, 7-, or 15-year property, which can pull deductions into the early years instead of spreading the full benefit across nearly four decades.

For example, parts of the flooring, specialty electrical work, certain exterior improvements, or qualified interior improvements may land in shorter-life categories. The strongest studies are usually engineering-based and reviewed by a tax advisor. Done well, cost segregation can turn depreciation from a slow annual deduction into a much larger early-year tax benefit.

Bonus depreciation in 2026

The One Big Beautiful Bill Act was signed into law on July 4, 2025, and restored 100% bonus depreciation for most qualifying business property bought and placed in service after January 19, 2025. IRS Notice 2026-11 provides interim guidance on the additional first-year depreciation deduction under the amended rules.

For commercial real estate investors, the key detail is that bonus depreciation doesn’t apply to the 39-year building shell. It applies to qualified property with a recovery period of 20 years or less. That’s why bonus depreciation is often paired with a cost segregation study: 

• The study identifies shorter-life components
• Bonus depreciation may allow those components to be deducted immediately

State conformity varies, so investors in states such as California or New Jersey may need state add-backs or separate schedules.

The Catch: Depreciation Recapture & How to Defer It

Understanding depreciation recapture

Depreciation is valuable, but it’s not free forever. When you sell the property, the IRS may tax the accumulated depreciation through depreciation recapture. For real estate, unrecaptured Section 1250 gain is generally taxed at a maximum rate of 25%.

Let’s say you claimed $200,000 in accumulated depreciation and then sold the property at a gain. The recapture portion could create up to $50,000 in federal tax before state taxes and other items. Also, skipped depreciation usually does not save you. The IRS can treat depreciation as “allowed or allowable,” which means missed deductions may still reduce basis. Form 3115 is commonly used to correct missed depreciation.

Deferring taxes with a 1031 exchange

A 1031 exchange can defer both capital gains tax and depreciation recapture when you sell an investment property and reinvest into like-kind real property. This makes it one of the main tools investors use to preserve capital and keep scaling.

The rules are strict. The IRS’s 2025 Instructions for Form 8824 state that replacement property must generally be identified within 45 days after the relinquished property is transferred, and received by the earlier of 180 days after that transfer or the due date of the taxpayer’s return. A qualified intermediary is also central to a properly structured deferred exchange.

Conclusion

CRE depreciation is a major reason CRE can be tax-efficient: it can reduce taxable income without reducing cash flow. Use the commercial real estate depreciation calculator to: 

• Estimate your deduction and tax savings
• Test cost segregation, bonus depreciation, and 1031 scenarios before you make a move

Always confirm the final strategy with your tax professional.