Upstream Property Tax: Why Aging Assets May Increase Assessments 

Written by: Rodger Kret, Senior Tax Manager; Sam Moore, Senior Tax Manager; Gregg West, Director 

For many upstream operators, property taxes are expected to decline as wells mature and production decreases. Unfortunately, that assumption can lead to costly surprises. Aging oil and gas assets often become more complex to value, not less. As reserve estimates evolve, operating costs fluctuate; equipment ages, and market conditions change. The result is a property tax environment where declining production does not automatically translate into lower assessments.

Understanding why requires looking beyond the age of the asset itself and examining the factors that drive value throughout the life of a well. For companies focused on managing costs and maximizing asset performance, a proactive property tax strategy can be just as important in the later stages of a well’s life as it is during initial development.

Why Declining Oil & Gas Production Doesn’t Always Mean Lower Taxes

A common misconception in the industry is that aging wells naturally result in lower appraised values. While production generally declines over time, that decline alone does not determine taxable value.

In many jurisdictions, particularly Texas, producing oil and gas properties are valued using an income approach. Assessors project future production, estimate future expenses, forecast commodity prices, and discount those anticipated cash flows to determine present value. The challenge is that each of those variables is highly dynamic.

A mature well may produce less oil or gas than it did five years ago. However, if commodity prices increase, those higher prices can offset declining production volumes and, in some cases, increase the well’s overall value. Likewise, reserve estimates, operating costs, and enhanced recovery efforts can materially impact appraisal outcomes.

The result is a reality that surprises many operators: Declining production does not necessarily guarantee declining property taxes.

Asset Lifecycle

Property tax exposure evolves at every stage.

Development

Peak Production

Mature Production

Enhanced Recovery

End of Life

How Assessors Value Aging Wells 

Aging upstream oil and gas assets are fundamentally tied to one concept: depleting reserves.

When a well is first drilled, production is typically at its peak. Over time, reservoir pressure decreases, recoverable reserves diminish, and production gradually falls. Appraisers incorporate this reality through production decline curves, which project future output over extended periods, sometimes as long as 25 to 30 years.

The challenge is that production decline curves are not precise measurements. They are sophisticated forecasts built on historical production data, engineering assumptions, and reserve estimates. Small differences in these assumptions can create substantial differences in valuation.

Because reserve estimates are inherently predictive, operators should understand that appraisal models are only as accurate as the information used to build them. If assumptions regarding remaining reserves, operating expenses, or future production are overstated, taxable value may be overstated as well.

Age is Not the Same as Obsolescence

Another common misunderstanding is applying traditional depreciation concepts to upstream oil and gas assets.

Many production sites contain equipment that has been in service for decades. Separators, tanks, pipelines, gathering systems, and other infrastructure often continue functioning effectively long after their original installation. In some oil fields, production equipment more than fifty years old remains operational.

From a property tax perspective, age alone does not necessarily create substantial value reductions.

In cost-based valuation models, inflation can actually have the opposite effect. Replacement costs continue to rise as labor, materials, and construction costs increase. Once depreciation mechanisms have largely run their course, an older asset may continue increasing in assessed value simply because it would cost more to replace today than it did in the past.

This is one of the industry’s most important property tax realities: an aging asset is not automatically a less valuable asset.

Why Proactive Monitoring Matters 

Property tax risk often grows during periods of strong commodity pricing. 

When oil prices are high and production remains healthy, operators frequently pay less attention to property tax assessments because margins remain strong. Tax increases may appear reasonable or insignificant relative to overall profitability. Unfortunately, this creates an environment where elevated assessment levels can become normalized over time. 

The problem emerges when market conditions change. 

If commodity prices fall or production declines faster than expected, reversing previously accepted assessment increases can become far more difficult. Companies suddenly become focused on tax costs at precisely the moment when reducing taxable value is most challenging. 

The better approach is consistent engagement regardless of market conditions. Property tax management should remain a priority during both favorable and unfavorable commodity cycles.

Evaluate Your Property Tax Exposure

Operational Changes Can Have Significant Tax Consequences 

The Importance of Cross-functional Collaboration

Don’t Forget End-of-life Considerations 

One often-overlooked aspect of aging assets is what happens when production is no longer economic. 

Many appraisal methodologies assume some level of remaining equipment value at the end of a well’s productive life. In practice, however, operators may face significant plugging, abandonment, remediation, and site restoration costs. These obligations can exceed any potential salvage value associated with remaining equipment. 

In some situations, companies have determined that removing and remediating a site is more economical than continuing to incur years of property tax on equipment that no longer provides meaningful operational benefit. 

This illustrates a broader point: end-of-life planning should be incorporated into property tax strategy long before assets become uneconomic.

A STRATEGIC OPPORTUNITY, NOT JUST A TAX OBLIGATION 

Oil and gas assets are inherently dynamic. Production declines, commodity prices fluctuate, costs rise, ownership changes, and recovery methods evolve. Property tax assessments should reflect those realities, but they do not always do so automatically. 

Companies that treat property tax as an annual administrative requirement may miss opportunities to identify valuation discrepancies, challenge outdated assumptions, and align assessments with operational realities. By consistently monitoring reserves, production forecasts, operating costs, ownership interests, and appraisal methodologies, operators can better manage risk and identify potential savings throughout the asset lifecycle. 

Aging upstream oil and gas assets rarely tell the whole story. A well may be older, but that does not necessarily mean a reduced assessment. Taking a proactive approach can make the difference between managing property tax exposure and reacting after unnecessary costs have accumulated.