## Facts

- Illinois enacted sections 20a-1 through 20a-3 of the Revenue Act of 1939 (added in 1971), allowing qualifying farmland in certain counties to be assessed based on agricultural use rather than fair cash value.
- To qualify, land had to have been used for farming or agricultural purposes for the prior three years and the owner had to apply for the preferential valuation.
- If the land’s use changed from agricultural to nonagricultural, the statute imposed a “rollback” amount equal to the difference between taxes paid under the preferential valuation and taxes that would have been owed at fair cash value for the prior three years, plus 5% interest on the differences.
- Property owners in Du Page County, including Paul W. Hoffmann, challenged the statutory scheme as unconstitutional and sought declaratory and injunctive relief.
- The circuit court held all challenged sections unconstitutional; county and state officials appealed directly to the Illinois Supreme Court.

## Issues

1. Whether the Illinois Constitution limits the General Assembly’s power to classify real property for taxation, and whether the agricultural-use assessment scheme violated state constitutional requirements for property taxation, including uniformity.
2. Whether the preferential assessment and rollback provisions violated state or federal equal protection or due process guarantees.
3. Whether plaintiffs who applied for and received the preferential assessment were estopped from challenging the statute under an acceptance-of-benefits doctrine.

## Decision

- The Illinois Supreme Court reversed the circuit court and upheld sections 20a-1 through 20a-3 as constitutional.
- The court held the General Assembly had authority to classify real estate for property-tax purposes absent an explicit constitutional prohibition.
- The court concluded the agricultural-use classification was reasonable and satisfied uniformity requirements within the class.
- The court upheld the rollback and 5% interest component as a rational condition on the tax benefit rather than an unconstitutional retroactive tax or penalty.
- The court rejected estoppel, concluding the challenge raised significant public policy questions about the tax structure.

## Legal Principles

- The legislature may create property-tax classifications so long as the classification rests on a real and substantial difference, bears a reasonable relation to a legitimate legislative objective, and is applied uniformly within the class.
- Under rational-basis review, preferential tax treatment for agricultural land may be justified by state objectives such as preserving farmland and discouraging speculative holding for development.
- A rollback provision that recaptures prior tax savings upon a change in use can be treated as a condition of the preferential benefit and may include a reasonable interest component.
- Acceptance of statutory benefits does not necessarily bar a constitutional challenge when the litigation presents broad public policy concerns affecting the validity of a revenue measure.

## Conclusion

The Illinois Supreme Court sustained a statutory program granting use-value assessment to qualifying agricultural land and requiring a three-year recapture of tax savings plus interest upon conversion to nonagricultural use, finding the classification and rollback mechanism consistent with state taxation requirements and state and federal due process and equal protection guarantees, and permitting the challenge despite plaintiffs’ prior receipt of the benefit.


Hoffmann v. Clark, 69 Ill. 2d 402, 372 N.E.2d 74 (Ill. 1977)