Real Estate Tax Calc
Riverside and the Inland Empire commercial real estate market
The Inland Empire — the broad region encompassing Riverside and San Bernardino counties east of Los Angeles — has become one of the most active industrial and logistics real estate markets in the United States. Riverside sits at the heart of this activity, benefiting from its position along major transportation corridors including Interstate 10, Interstate 215, and proximity to the Ontario International Airport and the Union Pacific and BNSF rail lines that connect Southern California to the broader national distribution network.
The surge in e-commerce fulfillment demand, driven by companies seeking distribution space to reach the Southern California consumer base, transformed the Inland Empire’s industrial market beginning in the mid-2010s and accelerating through the early 2020s. Riverside County saw significant absorption of industrial and warehouse space, with vacancy rates in some submarkets dropping to historically low levels. While the market has moderated from its peak, Riverside continues to attract investor and occupier interest because of its lower rents compared to Los Angeles County and its strategic logistics position.
Beyond industrial, Riverside’s commercial real estate market includes retail, office, and mixed-use properties serving the city’s population of over 300,000 and the broader Riverside Metropolitan Statistical Area. The University of California Riverside creates demand for retail and service businesses, and the healthcare sector (Riverside University Health System and other facilities) provides employment that supports commercial real estate demand.
Commercial real estate investors in Riverside must understand the distinct federal and California tax treatment that applies to commercial properties, which differs meaningfully from residential rental property in depreciation period, potential components eligible for accelerated deductions, and the applicable passive activity rules.
Commercial vs. residential depreciation: the 39-year rule
The most fundamental tax difference between commercial and residential investment property is the depreciation period. Residential rental property (including apartments, duplexes, and single-family rentals) is depreciated over 27.5 years under the straight-line MACRS method. Commercial real property — including industrial buildings, retail centers, office buildings, and other nonresidential structures — is depreciated over 39 years under the straight-line MACRS method.
The longer 39-year life means that a commercial investor’s annual depreciation deduction is smaller relative to the building cost compared to a residential investor. For a $2,000,000 commercial building, annual depreciation over 39 years is approximately $51,282. The same $2,000,000 building as a residential rental would produce annual depreciation of approximately $72,727 over 27.5 years. This means the commercial investor defers less income through depreciation each year.
The land component of a commercial property is not depreciable — only the building structure and certain improvements are depreciable. The allocation between land and building is typically based on the assessor’s land-to-total assessed value ratio, a formal appraisal, or the purchase price allocation in the contract. A higher land allocation reduces the depreciable basis and the annual depreciation deduction.
Proposition 13 and Riverside County commercial property taxes
California’s Proposition 13 applies equally to commercial and residential real property. When you purchase a commercial property in Riverside, the assessed value resets to the purchase price. Annual increases in assessed value are capped at 2% per year regardless of actual market appreciation. The assessed value does not reset again until the next change of ownership or new construction.
The base Proposition 13 property tax rate is 1% of assessed value. In Riverside County, voter-approved bond measures and special district assessments add to this base rate. The total effective property tax rate for commercial properties in Riverside County typically falls in the range of 1.0% to 1.3% of assessed value, depending on the specific parcel, location, and applicable special assessments. Industrial properties in logistics corridors and retail properties in established areas will have parcel-specific rates that should be confirmed through the Riverside County Assessor’s Office.
Unlike certain inherited residential properties under California’s Proposition 19, there is no commercial property exclusion from reassessment on change of ownership. A commercial property purchased from a long-time owner that had an assessed value far below market will be fully reassessed to the market-value purchase price at the time of sale. This reassessment can dramatically increase the new owner’s annual property tax compared to the prior owner’s bill.
Investors buying commercial property in Riverside from long-term holders should carefully calculate the expected post-reassessment property tax, not simply rely on the seller’s current tax bill as a proxy for future costs. A seller who has held a property for 20 years with a $500,000 assessed value on a $2,000,000 market-value asset is paying $5,000 per year in property tax; the new buyer at $2,000,000 will pay approximately $20,000 to $26,000 per year after reassessment.
California income tax on Riverside commercial rental income
California taxes income from commercial rental property as ordinary income at the same progressive rates that apply to other income, up to 13.3% at the highest bracket. There is no preferential California rate for commercial property income, and capital gains from the sale of commercial property in California are taxed as ordinary income at rates up to 13.3% — with no distinction for the holding period.
For an investor generating significant net income from a Riverside commercial property, the combined federal-plus-California marginal rate can be substantial. A high-income investor paying 37% federal income tax on net rental income and 13.3% California income tax faces a combined 50.3% marginal rate before accounting for any federal self-employment or Medicare taxes. This rate exceeds what applies in most other states and is a critical factor in comparing Riverside commercial yields to similar properties in Texas, Nevada, or other no-income-tax states.
California conforms to the federal passive activity rules for most commercial rental activity. Net commercial rental income is generally treated as passive unless the investor is a real estate professional or materially participates in the activity through day-to-day management involvement. Corporate investors holding commercial property through C corporations face California corporate income tax at 8.84% (plus a $800 minimum franchise tax), plus a 1.5% alternative minimum tax in some cases — the corporate structure changes the tax calculation significantly.
Worked example: $2,000,000 Riverside warehouse
An investor acquires a single-tenant industrial/warehouse building in Riverside for $2,000,000. The building is leased to a logistics tenant on a three-year net lease. The property produces annual net operating income (NOI) of $140,000, representing a 7% cap rate on the purchase price — a reasonable benchmark for Inland Empire industrial as of recent market conditions, though cap rates fluctuate with interest rates and market demand.
Depreciable basis: The land is allocated at 15% of purchase price ($300,000), and the building at $1,700,000 (85% of purchase price). Annual building depreciation over 39 years: $1,700,000 ÷ 39 = $43,590 per year.
Federal taxable income: $140,000 NOI − $43,590 depreciation = $96,410 federal taxable income from the property.
Federal income tax (28% bracket, illustrative): $96,410 × 28% = approximately $26,995.
California income tax (9.3% bracket, illustrative): $96,410 × 9.3% = approximately $8,966.
Year 1 property tax: $2,000,000 assessed value × 1.0% base = $20,000 state base, plus approximately $2,000 in voter-approved assessments = approximately $22,000 total. (Property tax is already deducted as part of the NOI calculation if the lease is structured as a gross or modified gross lease; for a triple-net lease, the tenant pays property tax and it does not reduce the investor’s NOI directly.)
Cost segregation opportunity: A cost segregation study on a $2,000,000 warehouse might identify 10% of the purchase price ($200,000) as 5, 7, or 15-year personal property or land improvements. Federally, with bonus depreciation at the applicable rate, this could produce a substantially larger first-year deduction. California would add back the bonus depreciation amount, maintaining the 39-year schedule for the building and the straight-line schedule for the reclassified components at the California level.
California transfer tax on commercial sales
California counties impose a Documentary Transfer Tax (DTT) on all real property sales. In Riverside County, the standard DTT rate is $1.10 per $1,000 of consideration, or 0.11%. The City of Riverside may levy an additional city-level transfer tax. For most commercial transactions in Riverside, the combined transfer tax is approximately 0.11% to 0.22% of the sale price, which is significantly lower than in San Francisco or Los Angeles County with their higher city-level rates.
On a $2,000,000 commercial sale in Riverside, the county DTT would be approximately $2,200. Any applicable city transfer tax would add to this. The transfer tax is typically a seller cost and is deductible as a selling expense on the seller’s federal return, reducing the amount realized and therefore the federal taxable gain. If the buyer assumes the transfer tax through contract negotiations, it becomes part of the buyer’s cost basis.
1031 exchanges and California commercial property
A 1031 like-kind exchange allows Riverside commercial investors to defer both federal and California capital gains taxes by reinvesting the net sales proceeds into a qualifying replacement commercial property. California conforms to the federal 1031 exchange rules, including the 45-day identification period and 180-day exchange completion deadline.
However, California has a specific rule: if you exchange California commercial property for replacement property located outside California, California will track the deferred gain and require you to report it on California Form 3840 annually until the replacement property is sold. California then collects the deferred California tax at that time. This “clawback” rule means that a 1031 exchange from Riverside to a Texas warehouse, for example, defers federal gain but does not permanently eliminate the California gain — it only defers it.
Exchanging from Riverside into another California commercial property avoids this tracking requirement and achieves a full deferral of both federal and California taxes on the deferred gain. Investors planning an exchange who want to move capital to lower-tax states should model the eventual California tax cost carefully before executing a California-to-out-of-state exchange.
Frequently asked questions
How is commercial property depreciated in California?
Commercial real property (nonresidential) is depreciated over 39 years using straight-line MACRS under both federal and California law. Land is not depreciable. However, certain interior components identified through a cost segregation study — wiring, plumbing, HVAC, flooring, lighting, and other personal property — may qualify for shorter depreciation lives of 5, 7, or 15 years. California does not conform to federal bonus depreciation, so any bonus depreciation claimed federally on those shorter-lived components must be added back on the California return. The California deduction takes place over the applicable straight-line life.
Does Proposition 13 apply to commercial properties in Riverside?
Yes. Proposition 13 applies to all real property in California, including commercial properties in Riverside County. Upon purchase, the assessed value resets to the purchase price. Annual increases are capped at 2% until the next change of ownership or new construction. Commercial properties reassess fully on change of ownership — there is no commercial exclusion comparable to the parent-child transfer exclusion for residential property. Investors buying from long-term holders will face substantially higher post-reassessment property taxes than the seller’s current bill reflects.
What are Riverside County commercial property tax rates?
Under Proposition 13, the base commercial property tax rate is 1% of assessed value. Voter-approved bonds and special assessments in Riverside County add to this, typically bringing the effective rate to 1.0% to 1.3% of assessed value depending on the specific parcel and taxing district. The assessed value for a commercial purchase resets to the purchase price and increases no more than 2% per year thereafter, providing predictable long-term holding costs.
Can I use bonus depreciation on a Riverside commercial building?
Federally, bonus depreciation does not apply to the commercial building structure itself (39-year property does not qualify). However, personal property components identified through a cost segregation study — 5, 7, and 15-year property — may qualify for federal bonus depreciation. California does not conform to bonus depreciation, so any federal bonus depreciation claimed on those components must be added back on the California return. The California deduction comes over the applicable straight-line life, so the California tax benefit is deferred, not eliminated.
Educational information and estimates only. Not tax advice. Tax rules change and vary by situation; consult a qualified tax professional before acting.