Commercial property Owners and/or Tenants across the St. Louis Missouri metropolitan area often accept tax assessments without scrutiny, assuming government valuations are inherently reliable. In practice, that assumption can result in persistent annual overpayments—and substantial long-term erosion of property value and profits.
When a commercial property is assessed above its fair market value, the consequences extend well beyond an inflated tax bill. The impact reduces cash flow, net operating income, valuation, and ultimately, returns on investment for the property Owner, the Tenant, or both.
The Mathematics of Compounding Overpayment
Consider a commercial property assessed at $2.8 million by the Assessor when market data supports a value closer to $2.3 million. That $500,000 (18%) fair market value overassessment, applying a typical tax rate of approximately 10% against the assessed value, produces approximately $16,000 in excess property taxes annually.
Over a ten-year hold period, that equates to $160,000 in direct tax overpayments—before factoring in reassessments, rate increases, or the lost return on those funds.
This is not a one-time error; it represents a recurring drag on performance.
Direct Impact on Net Operating Income and Valuation
For commercial properties, property taxes are a material operating expense. Every dollar of excess tax reduces net operating income (NOI), which in turn directly affects valuation.
Using standard capitalization principles, a $16,000 annual tax overpayment can reduce property value by $200,000 to $270,000, assuming cap rates in the 6%–8% range. Larger assessment discrepancies scale accordingly, meaning an overassessment can translate into millions of dollars of negative asset value impact.
Accordingly, an inflated assessment does not just increase expenses – it actively suppresses the market value of the property, or for a Tenant, leads to reduced net operating income.
Cash Flow Constraints and Deferred Investment
Excessive property taxes constrain cash flow that would otherwise be deployed to improve or reposition the asset. Owners may delay capital improvements, tenant buildouts, or necessary maintenance because funds are being diverted to cover inflated tax obligations.
Over time, this can create a negative cycle: reduced reinvestment leads to stagnation or decline in property performance, while the tax burden remains artificially high. The result is diminished competitiveness in leasing, lower tenant retention, and weaker overall returns.
The opportunity cost is equally significant. Capital lost to unnecessary taxes cannot be reinvested into higher-yield opportunities, whether within the property itself or across a broader portfolio.
Assessment Momentum and Compounding Exposure
Property assessments tend to build on prior valuations. An overassessment that goes unchallenged often becomes the baseline for future assessment cycles, creating upward momentum that compounds the problem.
Each reassessment period presents an opportunity to correct valuation—but failing to act allows the inflated baseline to persist and potentially expand. Over multiple cycles, relatively modest discrepancies can evolve into substantial valuation gaps.
At the same time, delaying an appeal can weaken the evidentiary position. Comparable sales become outdated, income data shifts, and market conditions change—sometimes in ways that make it more difficult to demonstrate overvaluation. This is particularly critical at the time an Owner loses a principal tenant.
Impact on Transactions and Financing
Inflated property taxes affect more than internal financial performance—they influence how the asset is evaluated by buyers, investors, and lenders.
Higher operating expenses reduce NOI, which can negatively affect underwriting, debt service coverage ratios, and investor returns. Even when buyers adjust for potential tax appeals, the existence of an inflated assessment introduces friction into negotiations and can impact pricing.
In competitive markets, properties with excessive tax burdens may be viewed less favorably relative to comparable assets with more accurate assessments.
The Appeals Window and Strategic Timing
Missouri law provides a defined timeframe to challenge property tax assessments. Appeals to County Board of Equalization are generally due by the second Monday in July. (Check with the particular County Board of Equalization where the property is located for its specific Appeal deadline.) The cycle is a two-year cycle beginning in odd numbered years. However, if a taxpayer does not file in an odd-numbered year, they may file an appeal for the remaining even numbered year. A taxpayer MUST file a Board of Equalization appeal to preserve the opportunity to file an appeal with the Missouri State Tax Commission. This requirement is called “Exhaustion of Administrative Remedies.” Furthermore, an attorney MUST file the State Tax Commission appeal and represent the taxpayer throughout proceedings if the subject commercial property is owned by a corporate entity (e.g. LLC, Corporation, REIT) or a trust of any type. State Tax Commission appeals must be filed within a strict timeframe, generally by September 30 of the assessment year or within 30 days of the Board of Equalization decision notice, whichever is later. There is an exception that allows for a Direct Appeal to the State Tax Commission without having filed a Board of Equalization appeal – if you purchased the property within 30 days of the statutory Board of Equalization deadline or later in the tax year, a taxpayer may file an appeal directly with the Missouri State Tax Commission.
Normally, missing the Board of Equalization appeal filing deadline effectively locks in the overassessment for another tax year, along with its financial consequences.
Some Owners attempt to time appeals based on market conditions or anticipated valuation changes. That strategy carries risk. The cost of delay is certain and ongoing, while the availability of favorable evidence is not. Appeal cases should be organized well before filing deadlines are reached. Early preparation may grant better outcomes and more efficient legal work.
A Practical Approach to Asset Protection and Expense Reduction
For commercial property Owners and major Tenants, appealing an inaccurate assessment is not merely a procedural exercise – but should be a core component of asset management and expense reduction.
The cost of inaction includes recurring tax overpayments, reduced NOI, suppressed valuation, and lost investment opportunity. By contrast, a successful appeal can immediately improve cash flow and enhance asset value, often with a return that far exceeds the effort and expenditures required.
Contact a Commercial Real Estate Tax Appeal Attorney Today
Let an experienced business attorney from Uthoff, Graeber, Bobinette & Blanke advocate for your rights and interests. Contact David Adam today for a free, confidential consultation to learn more about Commercial Real Estate Tax Appeals. The St. Louis Missouri metropolitan area referred to in this article include St. Louis County, City of St. Louis, St. Charles County, Jefferson County, Lincoln County, Franklin County, Warren County, and Washington County.
Disclaimer: The information provided on this blog is for general informational purposes only and does not constitute legal advice. Always consult with a qualified attorney regarding your specific situation. Your particular facts and circumstances may alter conclusions derived from information contained in this blog. The author assumes no liability for any errors or omissions in the content and is not responsible for any damage resulting from the use of this information.