What Your Backroad Land Is Worth
Why an acre isn't an acre, and how to read the number before you buy, sell, or appeal.
Productivity is the spine
Illinois farmland value tracks the soil's Productivity Index (PI) more than almost anything else. PI runs roughly 47–147; the higher the PI, the more corn and beans the ground yields, and the more a farmer will pay to own or rent it. Two neighboring 40s can differ by hundreds of dollars an acre on soil alone.
Split the acres
A good valuation doesn't average a farm — it splits it. Tillable acres get valued on productivity ($ per PI point). Timber, water, and rough ground get valued as recreation. A 'bad farm' with a creek and a hardwood ridge can carry real recreational value even where the tillable number is soft.
The tax angle
Farmland is assessed on use-value (a formula off recent farm income), not market value — so your assessment and your market price move on different clocks. If your assessment jumped and your income didn't, that's an appeal worth running. Know your legal description and your tax code before you walk into the assessor's office.
A number is a decision, not a fact
Any single value is a point on a range. What matters is why — the comps, the soils, the access, the adjacency. Understand the drivers and you can negotiate; take the headline number on faith and you're guessing.