
An Overview of Farm Depreciation Rules
Many landowners don’t realize that a portion of a farmland purchase may qualify for farmland depreciation under IRS guidance on farm depreciation—specifically related to soil fertility. Under established IRS rules and supporting case law, the cost allocated to wasting farm assets, such as residual fertilizer, lime, and soil nutrients present at the time of purchase, may be depreciated rather than permanently added to land value. See soil nutrient management and soil fertility.
While land itself is not depreciable, the IRS recognizes that certain soil fertility components are consumed over time through crop production. Because these nutrients decline with use, they may qualify for farm asset depreciation when properly documented and allocated during the purchase process.
In practice, IRS depreciation guidance allows specific components of a farmland acquisition to be treated as depreciable assets. Rather than assigning all value to non-depreciable land, certain soil nutrients can qualify for farmland depreciation and be included in a farm depreciation schedule.
How Soil Fertility Qualifies for Depreciation
To take advantage of these tax rules, buyers typically complete a soil fertility allocation study at or near the time of purchase. This study measures existing nutrient levels—such as nitrogen, phosphorus, potassium, and lime—and assigns a value to those nutrients based on current agricultural input costs. Learn about the importance of a farmland assessment checklist.
The purpose of this analysis is to identify nutrients already present in the soil that will be consumed through crop production over time. Because these nutrients gradually decline, they can qualify as a wasting asset eligible for farm asset depreciation rather than remaining permanently embedded in the non-depreciable value of the land.
Depreciation Schedule for Soil Nutrients
Once the fertility value has been determined, the allocated amount is depreciated over its useful life as part of a farm depreciation schedule. In many cases, soil fertility is depreciated over 4 to 7 years, depending on crop rotation, nutrient depletion rates, and management practices.
This structure allows producers and farmland investors to accelerate deductions compared with leaving the value permanently assigned to land. Properly documented farmland depreciation related to soil fertility can create significant front-loaded tax deductions and improve cash flow during the early years of ownership.
Why Soil Fertility Depreciation Matters for Farmland Investors
For producers and farmland investors—especially those acquiring irrigated or high-quality dryland acres—treating soil nutrients as depreciable assets can be a powerful but underutilized strategy.
When soil fertility is documented through professional testing and properly allocated at purchase, it may qualify for farm asset depreciation rather than remaining permanently embedded in land value. Coordinating this process with a CPA familiar with agricultural taxation ensures the depreciation treatment aligns with IRS guidance.
When implemented correctly, incorporating soil fertility into a farm depreciation schedule can materially reduce taxable income while preserving the long-term productive value of the land.
Ready to take the next step?
AgWest Land Brokers can help you understand the results of a farmland assessment before you make a decision to purchase. To see how we can help call 866-995-8067, send an email, or fill out our convenient web form.








