Last updated 2026-07-25
TL;DR
Under the Illinois Condominium Property Act (765 ILCS 605), a board can levy a special assessment for expenses not covered in the annual budget, but any assessment exceeding 115% of the prior year's regular assessment generally needs a unit owner vote unless it's for emergencies or court-ordered repairs. Boards must give proper notice and keep reserve funding decisions documented.
What is an HOA assessment (and how is a special assessment different)?
An HOA or condo assessment is the fee owners pay to fund the association's operations. Regular assessments cover routine costs: landscaping, insurance, management fees, utilities for common areas, and contributions to reserves. A special assessment is a separate, additional charge the board levies when the regular budget doesn't cover something, usually a large repair, an insurance shortfall, or a legal judgment. In Illinois, both types of assessments are governed by the Illinois Condominium Property Act, 765 ILCS 605 [1]. The Act doesn't use the phrase 'special assessment' loosely. It ties board authority to levy one to specific budget and notice provisions, and it caps how much a board can impose without a membership vote in most circumstances. The practical difference for an owner: your regular assessment is predictable and budgeted a year in advance. A special assessment shows up because something wasn't budgeted, wasn't reserved for, or cost more than expected. A burst pipe, a failed roof, a fire code violation, an unbudgeted legal settlement. All can trigger one.
What does the Illinois Condominium Property Act actually say about special assessments?
Section 18(a)(8) of the Act requires condo declarations to give the board power to adopt and amend a budget, and Section 18.4 addresses the powers and duties boards have around budgets and assessments [2]. The key limiting provision most Illinois practitioners point to is found in the association's declaration and bylaws working alongside 765 ILCS 605/18.4, which commonly requires owner approval (often a majority of those voting at a meeting where quorum is met) for any assessment that would raise total assessments for that fiscal year more than 115% over the prior year, unless the increase is for emergency repairs or expenses mandated by court order or governmental agency. That 115% figure is not a number invented by property managers, it traces to standard Illinois condo declaration language built around the statutory board powers in Section 18.4(d)-(e) [2]. Because the exact percentage and vote threshold live in each association's declaration (which must comply with, but can vary somewhat from, the statutory floor), your board's actual trigger point could differ. Always confirm the specific language in your declaration with your association's attorney before assuming the 115% figure applies verbatim. The Act also requires that assessments be levied against unit owners in proportion to their percentage ownership interest as stated in the declaration, per Section 18(a)(8)(iii) framework carried through the statute's assessment provisions [1]. A board cannot simply assign a flat special assessment per door unless the declaration's percentage-interest formula happens to produce that result.
Does a special assessment in Illinois need an owner vote?
Often yes, but not always. If the special assessment, combined with the regular assessment, would push the year's total assessments above the emergency/court-order exception and above whatever ceiling (commonly 115% of the prior year) is written into the declaration, most Illinois declarations require a vote of the unit owners, more than board approval. Emergency repairs are typically exempt from the vote requirement. So are expenses mandated by a governmental agency, a court, or an arbitrator. A board facing a collapsed retaining wall or a fire marshal order generally doesn't need to poll owners first; it needs to act and can special-assess without a vote under the emergency carve-out most declarations include, consistent with the framework in 765 ILCS 605/18.4 [2]. Outside emergencies, boards should expect to hold a properly noticed meeting, confirm quorum under the association's bylaws, and get the vote threshold the declaration specifies. Skipping that step is one of the most common reasons an Illinois special assessment gets challenged in court or arbitration.
What notice is required before a special assessment vote or levy?
The Act requires associations to give unit owners advance written notice of board meetings where a special assessment will be considered, and notice requirements are typically spelled out in both the statute's meeting provisions and the association's bylaws. Section 18(a)(9) of the Act requires boards to give notice of board meetings to unit owners, with limited exceptions for emergency meetings [1]. For a vote requiring owner approval (more than a board vote), the association typically needs to notice a proper unit owner meeting per the bylaws, which usually means 10 to 30 days advance written notice depending on what the declaration specifies, plus an agenda that discloses the proposed assessment amount and purpose. Boards that try to fold a special assessment vote into an unrelated meeting without disclosing it on the agenda risk a later legal challenge. Document the amount, the reason, the payment schedule, and the vote count in the meeting minutes. That paper trail matters if an owner later disputes the charge or if the association ends up in court trying to collect.
What is a reserve study and why does it matter for special assessments?
A reserve study is a professional evaluation of an association's common element components (roofs, elevators, parking structures, pools, siding) that estimates remaining useful life and the cost to repair or replace each item, then recommends how much the association should be setting aside annually. It's the tool that, done well, prevents special assessments from becoming a surprise. Illinois law treats reserves differently than Florida's post-Surfside statutory reserve study mandate. The Illinois Condominium Property Act doesn't require a licensed structural engineer to perform a statutory reserve study the way Florida's SIRS process does under Fla. Stat. 718.301 and 718.112 [3]. Instead, Section 9(c)(2) of the Illinois Act addresses reserve funding in general terms, and many Illinois associations rely on industry-standard reserve study practices (often following Community Associations Institute national guidance) rather than a state-mandated engineering inspection. That's a meaningful difference for boards moving between states or comparing notes with counterparts in Florida. If your association also owns property in Florida, or you're benchmarking against Florida's newer 718.301 structural integrity reserve study requirements, read our reserve study explainer and our reserve study for condo association guide for the fuller national and Florida-specific picture.
What is a reserve study for an HOA specifically?
For a homeowners association (as opposed to a condominium), a reserve study covers common elements the HOA owns and maintains: private roads, retention ponds, clubhouse structures, pool equipment, gates, shared roofs on attached units. The mechanics are the same as a condo reserve study; the difference is just what's being inventoried. Most reserve studies, whether for a condo or an HOA, follow a two-part structure: a physical analysis (site inspection, component inventory, remaining useful life estimates) and a financial analysis (current reserve fund balance, funding plan, and a percent-funded calculation). The National Reserve Study Standards published through Community Associations Institute guidance are the closest thing to an industry benchmark most reserve specialists use nationally. Our hoa reserve study page walks through the process and what a report typically contains, which applies conceptually to Illinois HOAs even though Illinois doesn't mandate the same statutory structural inspection Florida now requires.
How much should an HOA have in reserves?
There's no single legal percentage that applies in Illinois the way some other states now mandate. The commonly cited industry benchmark, from reserve study professionals nationally, is that an association should aim to be funded at 70% or more of its calculated full-reserve target to be considered reasonably healthy; anything under 30% funded is generally flagged as poor or at risk of special assessments [4]. Those percentages come from the reserve study industry (notably referenced in Community Associations Institute educational materials and used by reserve specialist firms across the country), not from Illinois statute. Illinois law doesn't set a mandatory reserve funding floor for condo associations the way, say, Florida's 718.112(2)(f) now requires funding based on the SIRS for buildings three stories and higher [3][5]. The honest answer for an Illinois board: hire a reserve specialist, get a percent-funded number, and compare it to your association's risk tolerance. A 25-year-old building with an aging roof and elevator needs a materially different reserve posture than a 5-year-old townhome HOA. Boards that persistently underfund reserves are the ones that end up needing large, unpopular special assessments when a roof or boiler finally fails.
How much does a reserve study cost?
Reserve study costs vary by association size, number of components, and whether it's a full study (with a site visit) or an update. Industry pricing commonly cited by reserve study firms and HOA management resources runs roughly $3,000 to $6,000+ for a full reserve study on a mid-size condo association, with large or complex properties (structured parking, multiple elevators, high-rise systems) running higher, sometimes into five figures. Update studies without a full site visit are typically cheaper, often in the $500 to $1,500 range. These figures are industry-typical ranges reported by reserve study providers and HOA-focused publications, not fixed statutory fees; actual cost depends heavily on your market, building complexity, and whether you need a full structural component inventory or a lighter update. Get at least two quotes from Illinois-licensed or nationally credentialed reserve specialists (look for the Reserve Specialist or RS credential from Community Associations Institute) before committing. Compared to the cost of a special assessment triggered by a failed roof or facade, a few thousand dollars every 3 to 5 years for an updated reserve study is inexpensive insurance against surprise costs.
Are HOA special assessments tax deductible?
Generally no, not for the individual homeowner, and this is one of the most common misunderstandings owners have. Special assessments paid to a condo or HOA for capital improvements, repairs, or reserve shortfalls are typically treated as a nondeductible personal expense, similar to how regular HOA dues aren't deductible for a primary residence. There are narrow exceptions. If part of the special assessment funds a capital improvement, it may be added to your home's cost basis, which can reduce capital gains tax when you sell, per general IRS guidance on capital improvements and basis adjustments in IRS Publication 523 [6]. If you rent out the unit, a portion of the assessment allocable to repairs and maintenance may be deductible as a rental expense, and improvements can be depreciated, following the general framework in IRS Publication 527 for rental property expenses . This isn't a full tax analysis and Illinois owners should talk to a CPA or tax preparer about their specific situation, especially with a large special assessment that might shift between 'repair' and 'capital improvement' treatment.
How does Illinois compare to Florida's special assessment and reserve rules?
| Statutory reserve study mandate | No state-mandated structural reserve study | Yes, SIRS required for buildings 3+ stories under 718.301 [3] | |
|---|---|---|---|
| Milestone structural inspection | Not required by state statute | Required at 25/30 years depending on coastal location, per 718.301 and DBPR guidance | |
| Special assessment vote trigger | Often 115% of prior year (declaration-dependent) [2] | Board can levy without membership vote in most cases under 718.112 | |
| Reserve funding waiver allowed | N/A (no statutory reserve mandate to waive) | Waivers largely eliminated for SIRS-covered items after 2022 reforms [5] | |
| Emergency assessment exception | Yes, for emergency or court/agency-ordered repairs | Yes, board retains emergency authority under 718.112 | Florida's newer structural integrity reserve study requirement under Fla. Stat. 718.301, and the funding mandate in 718.112(2)(f), came directly out of the 2021 Champlain Towers South collapse and the legislature's 2022 and 2023 reforms [3][5]. Illinois has not adopted an equivalent statewide structural inspection or reserve mandate as of this writing. That's a real difference boards should understand, not a criticism of either system; the legal landscape genuinely diverged after 2021. If your association operates a Florida property, our hub articles on reserve study, reserve study for condo association, and florida condo reserve fund relief go deeper into the SIRS timeline and funding rules that don't exist under Illinois law. |
This matters if you sit on a board in Illinois but also watch Florida condo law, or if your management company operates in both states. The two states diverge sharply since Florida's post-Surfside reforms. | Feature | Illinois (765 ILCS 605) | Florida (Fla. Stat. ch. 718) |
What should an Illinois board do before levying a special assessment?
Start with the declaration and bylaws, not the statute alone. The Act sets a floor, but your specific vote threshold, notice period, and quorum requirement live in your governing documents. Read them, or better, have counsel confirm the exact trigger before the board acts. Second, get real numbers. If the assessment is for a repair, get at least one, ideally two, written estimates from licensed contractors. If it's for a reserve shortfall, get a reserve study or update so the board can show the assessment amount is tied to an actual funding gap, not a guess. Third, document everything. Meeting minutes should show the amount, the purpose, the vote (if required), and the payment schedule (lump sum vs. installments, which many declarations allow). Owners facing an unexpected five-figure bill deserve, and often legally require, a clear paper trail showing the board followed its own documents. Fourth, communicate early. Even where a vote isn't legally required (emergency repairs), sending a clear notice explaining why the assessment is happening reduces disputes and slow payment. Boards that surprise owners with a bill and no explanation see higher delinquency and more legal challenges. For Florida-facing boards juggling SIRS deadlines, milestone inspections, and reserve documentation on a compressed timeline, a structured system for tracking deadlines and required filings matters a lot. That's the gap our $199 one-time Board Compliance Kit is built to close: it organizes the SIRS and milestone inspection schedule, tracks required notices, and keeps your documentation in one place so a board isn't reconstructing the paper trail after the fact. It doesn't replace your engineer, reserve specialist, or attorney; it organizes what they produce.
Can owners stop or challenge a special assessment in Illinois?
Yes, in specific circumstances. If a board levies an assessment above the declaration's threshold without the required owner vote, owners can challenge it in court as improperly noticed or improperly authorized. Illinois courts have generally required strict compliance with notice and voting procedures spelled out in the Act and the declaration. Owners can also challenge an assessment if the board can't show a rational basis tied to actual costs, meaning the board padded the number, applied it disproportionately (not per the percentage-interest formula in the declaration), or used it for a purpose outside the board's authority. What owners generally cannot do is refuse to pay a properly authorized assessment just because they disagree with the spending decision. Courts give boards broad deference on business judgment calls (repair now vs. defer, which contractor to hire) as long as the board followed its procedural obligations under the Act and the declaration.
Frequently asked questions
What is a reserve study?
A reserve study is a professional assessment of an association's major common-element components (roofs, elevators, pavement, pools) that estimates remaining useful life and replacement cost, then recommends annual reserve contributions. It has two parts: a physical inventory/inspection and a financial funding plan. It's the primary tool boards use to avoid surprise special assessments.
What is a reserve study for an HOA?
For an HOA, a reserve study inventories the shared components the association owns, such as private roads, clubhouse buildings, pool equipment, and retention ponds, estimates their remaining life and replacement cost, and recommends how much the HOA should save each year. The process mirrors a condo reserve study but covers whatever common property the HOA's governing documents assign it.
What is an HOA assessment?
An HOA assessment is the fee an owner pays to the association to cover shared costs: landscaping, insurance, management, utilities for common areas, and reserve contributions. Regular assessments are budgeted annually. Special assessments are additional, unbudgeted charges levied when the regular budget can't cover a specific expense, like a major repair or an insurance shortfall.
What are HOA assessments used for?
HOA assessments fund operating expenses (landscaping, insurance, utilities, management fees, amenities) and reserve accounts for future capital repairs and replacements (roofs, paving, pools, elevators). Special assessments specifically fund costs the regular budget didn't anticipate, most often large repairs, legal judgments, or reserve shortfalls discovered after a reserve study update.
How much should an HOA have in reserves?
There's no universal legal minimum outside states with specific statutory mandates. Reserve study industry benchmarks commonly cited in Community Associations Institute materials suggest aiming for 70% or higher percent-funded relative to your reserve study's calculated target; below roughly 30% is generally considered a weak position that raises special assessment risk.
How much does a reserve study cost?
Full reserve studies for a mid-size condo or HOA typically run roughly $3,000 to $6,000 or more, depending on complexity, number of components, and whether a full site visit is included. Update studies without a new site visit are usually cheaper, often $500 to $1,500. Large or high-rise properties can cost significantly more.
Are HOA special assessments tax deductible?
Generally no, for a personal residence. Special assessments are usually treated as a nondeductible personal expense, similar to regular HOA dues. Exceptions: amounts funding capital improvements may add to your cost basis (reducing capital gains tax when you sell), and portions tied to a rental property may be deductible as rental expenses. Ask a CPA about your specific case.
Does Illinois require a vote before a special assessment?
Usually, if the special assessment combined with the regular assessment would exceed the threshold set in the association's declaration (commonly built around a 115%-of-prior-year framework tied to 765 ILCS 605/18.4), unless the expense is an emergency repair or mandated by a court or government agency. Confirm the exact trigger in your specific declaration with counsel.
Does Illinois require reserve studies like Florida does?
No. Illinois has no statewide statutory mandate requiring a licensed engineer to perform a structural reserve study, unlike Florida's Structural Integrity Reserve Study requirement under Fla. Stat. 718.301 for buildings three stories and higher. Many Illinois associations still commission reserve studies voluntarily, following industry standards rather than a state law.
Can a board levy a special assessment without an owner vote in Illinois?
Yes, when the assessment qualifies under the emergency exception or is mandated by a court order or government agency, most Illinois declarations let the board act without a membership vote. Outside those situations, if the assessment exceeds the declaration's threshold (often tied to 115% of the prior year's regular assessment), owner approval is typically required.
What notice must an Illinois board give before a special assessment?
The Illinois Condominium Property Act requires advance written notice of board meetings under Section 18(a)(9), with limited emergency exceptions. For a vote requiring owner approval, associations must notice a proper unit owner meeting per the bylaws, generally disclosing the proposed amount and purpose on the agenda, typically 10 to 30 days ahead.
What happens if an owner refuses to pay a special assessment?
If the assessment was properly authorized under the Act and the declaration, nonpayment is treated like any delinquent assessment: the association can typically charge late fees and interest, and ultimately pursue a lien and foreclosure under the Act's collection provisions. Disagreeing with how the board spends the money isn't a valid legal defense to nonpayment on its own.
Sources
- Florida Legislature, Fla. Stat. 718.301, Structural Integrity Reserve Study: Florida requires a Structural Integrity Reserve Study for condo buildings three stories and higher
- Community Associations Institute, reserve funding education resources: Industry benchmark of roughly 70% or higher percent-funded as a healthy reserve target
- Florida Legislature, Fla. Stat. 718.112, Bylaws: Florida requires reserve funding based on the SIRS and largely eliminated waivers for SIRS-covered components after 2022-2023 reforms
- IRS, Publication 523, Selling Your Home: Capital improvement portions of special assessments may be added to a home's cost basis
- IRS, Publication 527, Residential Rental Property: Portions of assessments tied to rental property repairs may be deductible as rental expenses, with improvements depreciated
- DBPR, Milestone Inspection and Structural Integrity Reserve Study guidance: Florida requires milestone structural inspections at 25 or 30 years depending on coastal location