Illinois HOA reserve study requirements (2026)
Reserves required; reasonable estimation of capital needs.
Quick facts
What the law actually requires
Illinois's Condominium Property Act at 765 ILCS 605/9 requires every condominium association to make a 'reasonable estimation' of capital expenditures and to maintain reserves accordingly. The statute requires reserves to be separately disclosed in the operating budget — owners must be able to see what's in reserves vs operating funds at a glance.
Illinois's reserve framework is less prescriptive than California's or Florida's, but Illinois courts have repeatedly interpreted the 'reasonable estimation' standard to require a current reserve study as the basis for the estimation. Boards using stale studies (5+ years old) or no study at all have faced fiduciary breach litigation under § 605/9 even though no statute explicitly mandates a cycle.
Chicago's condo-heavy market has produced an unusually deep body of case law interpreting § 605/9. Illinois HOA attorneys typically advise a 3-5 year Level I or II study to ground the 'reasonable estimation' requirement in defensible data.
How Apex Reserve Studio handles Illinois
Apex Reserve Studio's Illinois compliance jurisdiction produces the 765 ILCS 605/9 reserve and operating budget summary with reserves separately disclosed in the format Illinois courts have looked to in 'reasonable estimation' litigation. The dashboard tracks the study refresh date against the 5-year informal threshold.
Built-in Illinois compliance.
Select 765 ILCS 605/9 from the Compliance Jurisdiction dropdown and Apex's PDF builder produces the right disclosure format automatically. Engine math is identical across jurisdictions — only the deliverable changes.
Frequently asked questions — Illinois
Does Illinois require a specific reserve study cycle?
765 ILCS 605/9 does not specify a cycle but requires 'reasonable estimation' of capital expenditures. Illinois courts have interpreted this to require a current reserve study; most Illinois associations refresh every 3-5 years.
What does 'reasonable estimation' mean under Illinois law?
Reserves must be funded based on a defensible estimate of future capital expenditures. Illinois courts have rejected boilerplate or stale estimates and looked to reserve studies as the gold standard for grounding the estimation in current data.
Can Illinois owners waive condo reserves?
No. The reserve funding obligation under 765 ILCS 605/9 is mandatory. Owner votes can affect contribution levels through budget approval but cannot eliminate the obligation to maintain reasonable reserves.
How are Illinois reserves disclosed?
765 ILCS 605/9 requires reserves to be separately disclosed in the operating budget. Owners must be able to see the reserve balance, projected expenditures, and funding plan distinct from operating revenue and expense.