Reserve Study vs SIRS Report: What's the Difference and Why It Matters

A reserve study is a nationwide financial-planning document that estimates the cost of repairing and replacing every common-area component an association maintains, then recommends how much to save. A SIRS (Structural Integrity Reserve Study) is a narrower, Florida-only requirement that covers a fixed list of structural and life-safety components for buildings three or more habitable stories tall, and whose reserves can no longer be waived. Every building that needs a SIRS still needs ordinary reserve planning for everything else.

You are looking at a Florida condo. The disclosure packet includes a 60-page "reserve study" and a separate document labeled "SIRS." They both talk about roofs, money, and percent funded, so it is natural to assume one is just a newer name for the other. They are not. Confusing them can cost you, because they answer different questions, cover different components, and follow very different funding rules.

The stakes are real. After the 2021 Champlain Towers South collapse in Surfside, Florida rewrote how condos must plan for structural repairs. A building can have a healthy-looking general reserve study and still be out of compliance, underfunded, or facing a mandatory assessment because of what a SIRS requires. For buyers and owners, knowing which document you are holding, and which one is missing, is part of reading the building's real financial health.

This guide breaks down what each document is, where they overlap, the one rule that separates them most, and how SIRS fits alongside the milestone inspection that buyers often confuse with it.

What Is a Reserve Study?

A reserve study is a long-range capital budget that inventories every major common-area component, estimates repair and replacement costs, and recommends a multi-year funding plan.

A reserve study is the association's long-range capital-planning tool, used across the country. It has two parts. The physical analysis inventories the major components the association maintains, assesses their condition, and estimates each one's remaining useful life and replacement cost. The financial analysis looks at the current reserve balance, calculates how well funded the association is, and recommends a multi-year funding plan so the money is there when a roof or elevator reaches the end of its life.

The defining feature is its breadth. A reserve study covers everything the association is responsible for maintaining: roofs, paving and asphalt, pools and pool equipment, exterior painting, fencing, elevators, HVAC, the clubhouse, and more, usually over a roughly 30-year horizon. The Community Associations Institute established National Reserve Study Standards in 1998 and created the Reserve Specialist (RS) credential to standardize how these studies are prepared.

The headline number is percent funded: the reserve balance divided by the amount the association should ideally have saved. By the tiers Association Reserves uses, above 70% is strong, 30% to 70% is fair, and below 30% is weak and at real risk of a special assessment. Roughly 74% of associations are funded below 70%. We cover the mechanics in how to read a reserve study in 5 minutes and what percent funded means.

One thing a reserve study is not: a structural safety inspection. The physical analysis is a visual condition assessment for budgeting purposes, not an engineering-grade evaluation of whether the building is structurally sound. That distinction is the heart of the SIRS comparison.

What Is a SIRS Report?

A SIRS is a Florida reserve study limited to a fixed list of structural and life-safety components, required for condo and co-op buildings three or more habitable stories tall.

A Structural Integrity Reserve Study (SIRS) is Florida's answer to a specific failure: associations that deferred structural maintenance because owners kept voting to waive reserves. Created by Senate Bill 4-D in 2022 after the Surfside collapse, and later amended by SB 154 (2023) and HB 913 (2025), the SIRS requirement lives in Fla. Stat. §718.112(2)(g). It applies to residential condominium and cooperative buildings that are three or more habitable stories, and it must be completed at least every 10 years.

Unlike a general reserve study, a SIRS does not try to cover everything. It studies a fixed, statutory list of structural and life-safety components:

• Roof
• Structure, including load-bearing walls and other primary structural members and systems
• Fireproofing and fire-protection systems
• Plumbing
• Electrical systems
• Waterproofing and exterior painting
• Windows and exterior doors
• Any other item with a deferred-maintenance or replacement cost over $25,000 that affects one of the components above

That $25,000 threshold was raised from the original $10,000 by HB 913, effective July 1, 2025. The original SIRS completion deadline of December 31, 2024 was also extended to December 31, 2025 for most existing owner-controlled associations. Some buildings can align their SIRS with a milestone inspection due by the end of 2026. For the full requirements, see the Florida SIRS report explained and our SIRS knowledge-base page.

Reserve Study vs SIRS: Side by Side

A reserve study is national, broad, and can be underfunded by a vote. A SIRS is Florida-only, narrow, structural, and mandatory to fund.

The two documents share DNA, both estimate component lives, costs, and funding needs, but they differ on scope, geography, and how binding the funding is. Here is the comparison that matters most:

The simplest way to hold the difference in your head: a reserve study answers "are we saving enough for everything we maintain?" A SIRS answers "are we funding the specific structural items that keep this building standing, whether owners like it or not?"

The Biggest Difference: You Can't Waive SIRS Reserves

Florida associations can still vote to underfund ordinary reserves, but as of December 31, 2024 they can no longer waive or reduce reserves for SIRS structural components.

For decades, Florida condo owners could vote at an annual meeting to fund no reserves, or less than fully funded reserves, under Fla. Stat. §718.112(2)(f). That kept dues low and was popular, and it is a big reason so many buildings entered the 2020s with badly deferred maintenance. That waiver ability still exists, but only for ordinary, non-structural reserve items.

For SIRS components, the waiver is gone. For budgets adopted on or after December 31, 2024, members of an owner-controlled association that must obtain a SIRS may no longer vote to provide no reserves, or less than the SIRS recommends, for those structural components. The funds must also be kept separate and used only for their designated components. HB 913 added flexibility in how associations fund the work, through loans, lines of credit, or special assessments with the required approvals, but that is a how-to-pay tool, not permission to underfund.

For a buyer, this changes what a clean-looking budget means. A Florida building that historically waived reserves now faces mandatory structural funding it cannot vote away, which often shows up as rising dues or a near-term special assessment. We walk through owner options in what owners can do about a SIRS assessment and the larger picture in the 2026 Florida condo crisis.

SIRS vs Milestone Inspection (the Third Term People Confuse)

A milestone inspection is a structural safety check by an engineer or architect. A SIRS is the financial reserve study that funds those structural components.

Buyers often see three terms and assume two of them are the same. The milestone inspection and the SIRS were created by the same 2022 law, but they do different jobs.

The milestone inspection (§553.899) is a physical safety check. A licensed engineer or architect performs a visual Phase 1 examination of the structure when a building reaches 30 years of age, then every 10 years after that. Buildings near salt water may face an earlier timeline if the local enforcement agency determines local conditions warrant it. If Phase 1 finds substantial structural deterioration, a more invasive Phase 2 follows. The SIRS, by contrast, never touches the question of safety; it exists to make sure the money is there to fix what the inspection might find. See milestone inspections in 2026 for the full breakdown.

Does a SIRS Replace a Reserve Study?

No. A SIRS covers only structural components. A Florida building still needs reserve planning for the pool, paving, clubhouse, and everything else it maintains.

This is the single most common misconception, and it matters for both compliance and due diligence. A SIRS covers a fixed list of structural and life-safety items. It does not cover the swimming pool, the asphalt, the landscaping hardscape, the clubhouse, the amenity buildings, or any of the other common elements an association still has to repair and replace. A building can be fully SIRS-compliant and still be dangerously underfunded for everything outside that structural list.

In practice, many Florida associations now maintain a combined reserve study that includes the SIRS structural components plus the ordinary, non-structural components in one document, with the structural items flagged as the no-waiver portion. When you review a Florida building, do not stop once you confirm a SIRS exists. Check that the rest of the building's components, the ones the association can still choose to underfund, are also being funded responsibly.

What Buyers and Owners Should Check

In Florida, confirm both a SIRS and a milestone inspection exist; everywhere, check percent funded and whether reserves are being responsibly funded.

Whether you are buying or already own, here is the practical checklist:

• Confirm the documents exist. In Florida, a 3+ story building should have both a completed SIRS and, if it is 30 or more years old, a milestone inspection. A missing or overdue SIRS is itself a red flag.
• Read the SIRS funding plan, not just its existence. Because SIRS reserves cannot be waived, an underfunded SIRS signals that dues are about to rise or an assessment is coming.
• Check percent funded on the broader reserve study. Below 30% is weak. This applies to the non-structural components a SIRS does not cover.
• Cross-check against the meeting minutes and the budget. Anticipated structural work discussed in the minutes but not yet funded tells you what is coming. See 7 meeting-minutes red flags.
• Confirm you actually received the reports. Under Fla. Stat. §718.503, a Florida resale seller must give a buyer the milestone summary and the most recent SIRS, or a statement that none exists. If they are not provided, the contract is voidable at the buyer's option before closing.

Reserve Study Rules Outside Florida

Most large condo states require reserve studies on a set schedule, but only Florida adds a separate mandatory structural study like the SIRS.

SIRS is unique to Florida, but reserve studies themselves are required in many states, just under ordinary reserve-study law rather than a structural-safety statute. A sampling of the major condo states:

Confirm the exact current interval for your state with a local attorney, since these statutes are amended often. Reserve adequacy also drives mortgage eligibility everywhere: Fannie Mae is raising its minimum reserve allocation from 10% to 15% of budgeted assessment income for loan applications dated on or after January 4, 2027, which makes a current, well-funded reserve study (or SIRS) more important to your financing. See the 2026 Fannie and Freddie condo rules.