Last updated 2026-08-14
TL;DR
A reserve study (SIRS in Florida) projects future repair and replacement costs for building components and sets funding targets. A building condition assessment (the milestone inspection) is a structural safety check by a licensed engineer or architect. Florida condos need both: the milestone inspection at 25 or 30 years feeds the structural findings into the SIRS reserve numbers.
What is a reserve study?
A reserve study is a report, usually prepared every few years, that inventories a building's major shared components (roof, paving, painting, pool equipment, elevators, and so on), estimates each one's remaining useful life, and calculates how much money the association needs to save each year to pay for replacement without a surprise special assessment. A full reserve study typically has two parts: a physical analysis (site visit, component inventory, useful life and replacement cost estimates) and a financial analysis (current reserve balance, funding plan, and a multi-year cash flow projection). Most studies run 20 to 30 years out, because that covers the life cycle of the most expensive items like roofs and repaving. Florida condo law now has a specific, narrower version of this called the Structural Integrity Reserve Study, or SIRS. Under Florida Statutes section 718.112(2)(g), a SIRS covers a defined list of "structural" items: roof, load-bearing walls, floor, foundation, fireproofing and fire protection systems, plumbing, electrical systems, waterproofing and exterior painting, and windows and doors, plus "any other item that has a deferred maintenance expense or replacement cost that exceeds $10,000 and that, if not repaired or replaced, would negatively affect the items listed" [1]. A SIRS is not the same document as a traditional, broader reserve study that also covers things like landscaping or a clubhouse roof, though many associations now combine both into one report to save money. For background on how the funding math works, see reserve study for condo association.
What is a building condition assessment (and how is it different from a milestone inspection)?
A building condition assessment is a structural and physical evaluation performed by a licensed architect or engineer. It answers a different question than a reserve study: not "how much should we save," but "is this structure sound right now, and what needs fixing." In Florida, the statutory version of this is the milestone inspection, required under Florida Statutes section 553.899 for condominium and cooperative buildings three stories or more in height. The first milestone inspection is due by the 30th anniversary of the building's certificate of occupancy, or by the 25th anniversary if the building is within three miles of the coastline, and every 10 years after that [2]. The inspection has two phases: Phase 1 is a visual walk-through; Phase 2, a more invasive structural investigation, is only triggered if Phase 1 finds "substantial structural deterioration" [2]. A building condition assessment can be broader than a milestone inspection (it might cover mechanical, electrical, and life-safety systems too), or it can be exactly the milestone inspection scope. The key point: this is a one-time or periodic structural checkup, done by a licensed engineer or architect, not a savings plan. For the statutory detail on timing and coastal distance rules, see milestone-inspections.
How do a reserve study and a building condition assessment fit together?
They're sequential, not competing, documents. The milestone inspection or building condition assessment tells you what's structurally wrong or aging out. The SIRS reserve study tells you what it will cost to fix, and how to fund it over time. Florida's SIRS statute makes this connection explicit for the structural components list, but it does not require the SIRS preparer to duplicate the engineer's structural inspection. In practice, many associations time their SIRS to follow shortly after a milestone inspection so the engineer's findings on roof condition, waterproofing, and structural elements can feed directly into the reserve study's remaining-useful-life estimates. A board that gets a $2 million roof and structural repair estimate from a Phase 2 milestone report, then ignores it in the SIRS funding plan, is setting itself up for a special assessment fight later. Boards juggling both deadlines at once (a milestone inspection due and a SIRS due) often lose track of who is licensed to do what and which report has to reach owners first. That's the exact gap the $199 Building-Specific Board Compliance Kit at /board-kit-builder is built to close: it doesn't replace the engineer or the reserve specialist, but it organizes the deadlines, generates the owner notice language, and tracks which report is due when for your building's age and coastal zone.
What is an HOA reserve study, and does it work the same way as a condo SIRS?
An HOA reserve study covers the same basic idea, saving ahead for big-ticket repairs, but the legal requirements differ from condo law. Florida's SIRS mandate under section 718.112 applies specifically to condominium associations (and cooperatives under a parallel provision), not to single-family home HOAs. HOAs in Florida are governed mostly by chapter 720, and while many HOAs voluntarily commission reserve studies for roads, clubhouses, pools, or drainage systems, there is no statewide statutory mandate forcing every HOA to fund reserves the way SIRS forces qualifying condos to. Some HOA declarations require reserve funding on their own; some don't fund reserves at all and rely on periodic special assessments instead. If your community is an HOA rather than a condominium, confirm with your association's counsel which chapter and which governing document provisions actually apply, because "HOA" gets used loosely to describe both. For a broader look at how condo and HOA reserve rules diverge, see hoa-reserve-study.
What is a reserve study for an HOA, in practical terms?
In practical terms, a reserve study for an HOA is a planning document, not a compliance filing. A reserve specialist visits the property, inventories the common elements the HOA is responsible for (roads, retention ponds, entry gates, shared amenity buildings), estimates remaining life and replacement cost for each, and produces a funding schedule showing what the HOA should be setting aside annually. Unlike condo SIRS, there's no statutory list of mandatory components for an HOA study; the scope is whatever the HOA's governing documents make it responsible for maintaining. That means two HOA reserve studies can look very different in size and cost depending on whether the community has a private road network and a clubhouse, or just a shared entrance sign and a small retention pond. Boards should ask the reserve specialist to clearly separate "funded" vs. "unfunded" components and to show at least a 20-year cash flow table, more than a snapshot of current balances. A one-page summary with no multi-year projection isn't a real reserve study; it's a balance check.
What are HOA assessments, and how do they relate to reserves?
HOA assessments are the periodic charges owners pay to the association, usually split into regular assessments (monthly or quarterly dues covering operating costs and reserve contributions) and special assessments (one-time charges for a specific, often unbudgeted, expense). When an association has a properly funded reserve, routine assessments include a reserve line item that grows the fund gradually, so a roof replacement in year 18 doesn't require a shock bill. When reserves are underfunded (or waived, which condo owners in Florida can no longer do for SIRS components after the 2022 and 2023 legislative changes) [1], the association typically has to levy a special assessment to cover the gap when the repair actually comes due. That's the core argument for taking a reserve study seriously even when it's not legally mandatory: it converts an unpredictable, large, one-time bill into a predictable, smaller, recurring one. For more on how special assessments get triggered and structured, see hoa-special-assessment.
How much should an HOA (or condo) have in reserves?
There's no single dollar figure that applies to every property; the right reserve balance depends on the age, size, and component list of the specific building or community, which is exactly why a component-level reserve study exists instead of a rule of thumb. That said, a commonly cited industry benchmark used by reserve professionals is the "percent funded" ratio: reserves on hand divided by the theoretical fully-funded reserve balance for the association's age and component mix. A ratio above roughly 70% is generally considered healthy; ratios below 30% are considered weak and put the association at higher risk of a special assessment [3]. Florida's SIRS law takes a harder line for qualifying condos: as of the funding requirements phased in under section 718.112(2)(f) and (g), associations subject to SIRS can no longer vote to waive or reduce reserve funding for the statutory structural components, and must fund reserves based on the SIRS study's calculated amounts [1]. For a Florida condo board asking "are we saving enough," the honest answer is: get the SIRS or reserve study done by a qualified professional, look at the percent-funded number it reports, and treat anything under 50% as a signal to have a serious conversation about a multi-year catch-up plan rather than a single shock assessment.
How much does a reserve study cost?
Cost depends heavily on building size, component count, and whether it's a full reserve study or a narrower SIRS-only report. Nationally, reserve study firms commonly quote ranges from roughly $1,200 to $6,000+ for a small to mid-size association's initial full study, with larger or more complex properties (high-rises, multiple buildings, extensive amenities) running higher [3]. Update studies (revisiting an existing report without a full new site visit) typically cost less than a full initial study. Florida SIRS-specific studies, because they must be performed by a licensed engineer or architect for the structural components under section 718.112(2)(g), and because Florida's condo stock includes a large number of coastal high-rises, often land on the higher end of that range or above it for larger buildings. Boards should get at least two or three quotes and confirm the preparer's license type meets the statutory requirement (Florida requires the SIRS visual inspection portion to be performed by "a person qualified" under the statute, which generally means a licensed engineer or architect) [1]. DBPR's condominium division publishes licensing and complaint information for associations to verify a preparer's credentials [4]. Compare that $1,200 to $6,000+ study cost against the alternative: a special assessment for a deferred roof or structural repair on a mid-size condo building can easily run into the tens of thousands of dollars per unit. The reserve study is cheap insurance against that outcome.
Are HOA special assessments tax deductible?
For most owners, no. Special assessments paid to an HOA or condo association are generally treated by the IRS as an addition to the cost basis of your property, not a deductible expense, because they typically fund capital improvements (a new roof, structural repairs, major system replacement) rather than routine maintenance. There are narrow exceptions. If a special assessment specifically funds a repair tied to a casualty loss in a federally declared disaster area, or if the unit is rented out as investment property (where a portion of association costs may be deductible as a rental expense), different rules can apply. The IRS's general guidance on capital improvements versus repairs for real property is in Publication 523 (about home sale basis, where capital improvement costs including some assessments increase basis) [5]. Because tax treatment depends on the owner's specific situation (primary residence, rental, casualty loss), this is not something a board can answer for owners; direct them to a CPA or tax professional rather than guessing. Boards can, however, help owners by issuing a special assessment letter that clearly states what the assessment funds (capital repair vs. operating shortfall), since that documentation is what an owner's tax preparer will need. See condo-special-assessment-insurance for how some assessments interact with insurance claims, which raises its own separate tax questions.
Reserve study vs. building condition assessment: a side-by-side comparison
| Feature | Reserve study / SIRS | Building condition assessment / milestone inspection | |
|---|---|---|---|
| Core question answered | How much should we save, and when? | Is the structure safe right now? | |
| Who prepares it | Reserve specialist (SIRS visual inspection must be a licensed engineer or architect per section 718.112(2)(g)) [1] | Licensed engineer or architect [2] | |
| Florida legal trigger | Condos 3+ stories, phased mandatory funding under section 718.112 [1] | Condos/co-ops 3+ stories: 30 years from CO, or 25 years if within 3 miles of coastline, then every 10 years [2] | |
| Typical cost | Roughly $1,200 to $6,000+ depending on size and scope [3] | Varies by building size and phase; Phase 2 (invasive) costs substantially more than Phase 1 | |
| Output | Multi-year funding schedule, percent-funded ratio, component inventory | Pass/fail-style structural finding; Phase 2 triggered by "substantial structural deterioration" [2] | |
| How often | Typically updated every few years, or per governing document/statute cycle | Every 10 years after the initial milestone inspection [2] | The short version: the engineer tells you what's broken or aging out; the reserve study tells you what it costs to fix and how to pay for it without wrecking owners' finances in one lump sum. |
Do all Florida condos need both reports?
Not every Florida condo needs both, but most that are three stories or taller do. The milestone inspection requirement under section 553.899 applies to buildings three stories or more in height, statewide, once they hit the 25- or 30-year mark [2]. The SIRS requirement under section 718.112 applies more broadly to condominium associations, generally regardless of height, for buildings that reached the relevant age thresholds, though the structural-component list mirrors what a milestone inspection would flag. A two-story condo building might never trigger a milestone inspection but could still choose to commission a traditional reserve study to plan for roof and paving costs. A ten-story coastal condo will almost certainly need both: the milestone inspection at 25 years because of the coastal proximity rule, and the SIRS to fund whatever that inspection turns up. Because the exact application depends on your building's height, age, certificate of occupancy date, and distance from the coast, confirm the specific triggers with your association's counsel and your county building department rather than relying on a general rule.
What happens if a board skips one of these reports?
Skipping the milestone inspection when it's due, or skipping the SIRS, exposes the board to more than just financial risk. Florida's statutes put enforcement teeth behind both requirements: local building officials can require compliance with milestone inspection deadlines, and failure to complete a SIRS, or to fund reserves according to a completed SIRS, can expose board members to disputes over breach of fiduciary duty in addition to the practical risk of a large, sudden special assessment. Beyond the legal risk, skipping a reserve study just delays the math. The roof still needs replacing at the same time whether or not anyone budgeted for it. Boards that skip the study often end up doing the same work later, under worse conditions: emergency contractor pricing, owner anger, and a compressed timeline instead of a planned one. If your board is behind on either report, the practical first step is simple: get quotes from a licensed engineer or architect for the structural inspection, and from a qualified reserve preparer for the SIRS, and get both on the calendar. For help tracking which deadline applies based on your building's certificate of occupancy date and coastal distance, see florida-condo-reserve-fund-relief and reserve-study.
Frequently asked questions
What is a reserve study?
A reserve study is a professional analysis of a building's major shared components (roof, elevators, paving, plumbing, and similar systems) that estimates each item's remaining life and replacement cost, then produces a multi-year funding plan showing how much the association should save annually. Florida's SIRS is a statutory version of this focused on structural components under Florida Statutes section 718.112.
What is a reserve study for an HOA?
For an HOA, a reserve study covers whatever common-area components the HOA maintains, such as roads, retention ponds, or clubhouse buildings, and produces a similar funding schedule. Unlike condo SIRS, there's no statewide Florida statute forcing every HOA to commission one; it depends on the HOA's governing documents and whether the board chooses to do it voluntarily.
What is an HOA assessment?
An HOA assessment is a charge levied on owners to fund the association's expenses. Regular assessments cover ongoing operating costs and reserve contributions; special assessments are one-time charges for specific unbudgeted expenses, often triggered when reserves are insufficient to cover a needed repair.
How much should an HOA have in reserves?
There's no universal dollar figure; it depends on the property's age and component list. A common industry benchmark is the percent-funded ratio (reserves on hand versus the fully-funded target), where above roughly 70% is considered healthy and below 30% is considered weak, per reserve-industry guidance.
How much does a reserve study cost?
Full reserve studies for small to mid-size associations commonly run roughly $1,200 to $6,000 or more, depending on building size and component complexity. Florida SIRS reports, which require a licensed engineer or architect for the structural component inspection, often cost more for larger or coastal high-rise buildings.
Are HOA special assessments tax deductible?
Generally no. Special assessments usually fund capital improvements, which typically add to your property's cost basis rather than qualify as an immediate deduction. Exceptions can apply for casualty-loss repairs in federally declared disaster areas or for rental properties; owners should confirm specifics with a CPA or tax professional.
What is the difference between a reserve study and a milestone inspection?
A reserve study projects future costs and sets savings targets; a milestone inspection is a structural safety check performed by a licensed engineer or architect under Florida Statutes section 553.899. The inspection tells you what's structurally wrong; the reserve study tells you what it will cost to fix and how to fund it over time.
When is the milestone inspection due for a Florida condo?
Under section 553.899, condo and co-op buildings three stories or more must complete their first milestone inspection by the building's 30th anniversary of the certificate of occupancy, or by the 25th anniversary if the building is within three miles of the coastline, and then every 10 years afterward.
Who can legally perform a Florida SIRS or milestone inspection?
The structural visual inspection portion of a SIRS, and the milestone inspection itself, must be performed by a licensed engineer or architect under Florida Statutes sections 718.112 and 553.899. Boards can verify a preparer's license status through the Florida Department of Business and Professional Regulation.
Can a Florida condo association waive reserve funding?
For the structural components covered by SIRS, no. Since the reserve funding changes under section 718.112(2)(f) and (g), qualifying condo associations can no longer vote to waive or reduce reserves for SIRS-required structural items, though rules can differ for non-SIRS reserve components; confirm current requirements with association counsel.
Does every Florida condo need a SIRS?
Most condominium associations subject to Florida Statutes section 718.112 need a SIRS once they meet the statute's building and unit-count thresholds, generally regardless of height, though the exact scope and timing depend on the building's specifics. Confirm applicability with your association's counsel, since thresholds and phase-in dates have changed through recent legislation.
What's the fastest way to keep both deadlines straight?
Track the certificate of occupancy date, coastal distance, and last inspection or SIRS date in one place, then calendar both the 10-year milestone cycle and the SIRS update cycle. Tools like the $199 Building-Specific Board Compliance Kit at /board-kit-builder can organize these dates and generate owner notices, though the actual inspections and studies still require licensed professionals.
Sources
- Florida Senate, Florida Statutes section 718.112: Definition of SIRS structural components list and reserve funding requirements for qualifying condo associations
- Florida Senate, Florida Statutes section 553.899: Milestone inspection timing: 30 years from CO, or 25 years if within three miles of coastline, then every 10 years; Phase 2 trigger
- Community Associations Institute, "Reserve Studies: Best Practices Report" (PDF): Percent-funded benchmark (above ~70% healthy, below ~30% weak) for reserve fund adequacy
- Florida DBPR, Division of Condominiums, Timeshares, and Mobile Homes: DBPR oversight and licensing verification resources for condominium association professionals
- IRS Publication 523, Selling Your Home: Capital improvement costs, which can include certain special assessments, generally add to home cost basis rather than being currently deductible
- Florida Senate: Defines key terms used in the Florida Condominium Act, including 'reserves' and 'common expenses,' relevant to reserve study requirements
- Florida Senate: Establishes HOA financial reporting, budgeting, and reserve funding requirements for homeowners' associations
- IRS: Explains general rules on deductibility of assessments and expenses related to real property, relevant to whether HOA special assessments are tax deductible
- Florida Senate: Outlines condominium association board responsibilities, including obligations related to structural integrity reserve studies (SIRS)
- Congress.gov: Reference point for federal tax law context relevant to discussion of HOA assessment deductibility