Last reviewed: October 2026. General information, not engineering, legal or financial advice.
Ask ten condo owners what a reserve study is and you’ll get a few blank looks, a couple of “something the board does,” and maybe one person who has actually read theirs. That’s a shame, because the reserve study is the closest thing a building has to a medical chart. It tells you what is going to wear out, roughly when, what it will cost, and whether the money is there.
If you are buying into a building, sitting on a board, or just tired of surprise bills, this is the document to understand.
What a reserve study actually is
A reserve study has two halves. The physical half is an inventory of the components the association has to maintain and replace, such as roofs, elevators, boilers, windows, balconies, paving and pipework, with an estimate of each one’s remaining useful life and replacement cost. The financial half compares those future costs with the money in the reserve account and sets out a funding plan: how much the association should put aside each year so the cash is there when it’s needed.
That structure isn’t just industry habit. Several jurisdictions write it into law, and the requirements are worth knowing because they tell you what a good study should contain wherever you live.
In California, boards must arrange a visual inspection of major components at least once every three years and review the study annually. The study must identify components with a remaining useful life under 30 years, estimate their remaining life and cost, calculate the annual contribution needed, and include a reserve funding plan (Cal. Civil Code §5550).
In Ontario, a reserve fund study has a physical analysis and a financial analysis, and the funding plan must project at least 30 consecutive years, showing the minimum balance, assumed inflation and interest rates, and recommended contributions each year (O. Reg. 48/01). Studies cycle every three years between a comprehensive study, an update with a site inspection, and an update without one (Condo Authority of Ontario).
In British Columbia the document is called a depreciation report. Strata corporations with five or more lots must get one, and it has to forecast 30 years of maintenance and replacement costs and present at least three cash-flow funding models, for example reserves, special levies, higher fees, borrowing or a mix (Government of B.C.). The strata doesn’t have to adopt any of them, but owners get to see the trade-offs in plain numbers.
In New South Wales, the equivalent is a 10-year capital works fund plan, which must be reviewed at least every five years (NSW Government).
And in Florida, condo and co-op buildings of three or more habitable stories now need a structural integrity reserve study (SIRS) covering eight specific elements, from the roof and structure to waterproofing and windows. An association must obtain an updated SIRS before adopting any budget whose reserve funding doesn’t line up with the latest study’s plan (Florida DBPR).
How to read one in twenty minutes
Reserve studies can run to dozens of pages, but you can get most of the value from four places.
Start with the component list. Scan the remaining useful life column and circle anything under five years. Those are your near-term risks. In an older mid-rise, the usual suspects are the roof membrane, elevator modernisation, boilers or chillers, balcony and façade repairs, and supply and drain pipes.
Next, find the percent funded figure, if the study uses one. It compares the money actually in reserves with the amount that “should” be there given the age of every component. There is no legal magic number, and a young building will naturally look different from an old one, but a low figure in an older building with big items due soon means trouble. Ask the preparer what they consider adequate for your building and why.
Then look at the funding plan over 30 years. A healthy plan rises gently with inflation. An unhealthy one stays flat for years and then needs a big jump, or relies on special assessments in specific years. If you see a year where the projected balance falls close to zero, that is where the pain is scheduled.
Finally, compare the plan with the actual budget. This is the step most owners skip. A study that recommends $180,000 a year is useless if the board budgets $90,000. Florida’s rules now make that gap hard to ignore; most places still leave it to owners to notice.
Signs your building is underfunded
You can’t diagnose a building from a spreadsheet, but some patterns repeat.
The reserve contribution has been the same for years while the operating budget climbed. The study is old, or there isn’t one. The board has voted more than once to fund below the study’s recommendation “to keep fees affordable.” Large items appear in the five-year window with no matching cash. And the minutes mention deferred projects, temporary patches or engineers’ recommendations that weren’t acted on.
Lenders watch for some of the same things. For U.S. condo projects that need a full review, Fannie Mae generally expects at least 10% of the annual budgeted assessment income to go to replacement reserves, and says a reserve study can be used instead of that budget test in some cases (Fannie Mae Selling Guide). Fannie Mae also treats projects in need of critical repairs, including unfunded repairs costing more than $10,000 per unit due within 12 months, as ineligible until the work is done (Fannie Mae B4-2.1-03). An underfunded reserve can therefore hit resale values directly, not just through future assessments.
Who should prepare it, and what it costs
Use an independent professional. Depending on the jurisdiction that may be a credentialed reserve specialist, an engineer, an architect or a quantity surveyor. B.C., for instance, now limits depreciation reports to six designated professions and requires the report to name the preparer, their qualifications, insurance and relationship to the strata.
Prices vary with building size, complexity and whether a site visit is included, so get two or three quotes and compare the scope, not just the fee. A cheap desktop update on a building nobody has walked through in six years is a false economy.
When you hire, ask whether the preparer will present the findings at an owners’ meeting. A study the owners understand gets funded. A study that sits in the manager’s files doesn’t.
What boards can do about a bad study
The options are never pleasant, but they are well known: raise regular fees, levy a special assessment, borrow, delay non-critical work, or some combination. B.C.’s requirement for three funding models is a good habit to copy even where it isn’t the law, because it lets owners compare a gradual fee increase with a one-off charge or a loan in real numbers.
Borrowing has become more common. In Florida, HB 913 (2025) explicitly allows SIRS reserves to be funded through regular assessments, special assessments, lines of credit or loans, with owner approval for the latter options (Association Reserves bulletin). In Finland, housing companies have long financed big projects such as pipe replacement with a building-level loan repaid through a separate monthly capital charge, the rahoitusvastike (Kiinteistöliitto). That approach spreads the cost across the people who live with the new pipes, rather than whoever happened to own the flat in the year the work was done.
My own bias: boards should almost always prefer a steady, explained fee increase over a surprise lump sum. Owners can budget for the first. The second forces some of them to sell.
For buyers: questions to ask
Before you buy into any building with shared property, ask for the latest reserve study and the current budget, and ask how long ago the study was done. Ask whether the board has adopted the recommended contribution. Ask what major items are due in the next five years and how they will be paid for. And ask whether any special assessment or loan is being discussed. In many places some of this must be disclosed; the rest you’ll have to ask for.
Frequently asked questions
How often should a reserve study be updated?
It depends on local law. California requires an inspection at least every three years with annual review; Ontario requires updated studies at least every three years; B.C. depreciation reports run on a five-year cycle; NSW capital works plans are reviewed at least every five years. Even where nothing is required, many professionals recommend an update every few years and after any major repair.
Is a reserve study the same as a structural inspection?
No. A reserve study is a budgeting tool based mainly on a visual review. A structural inspection, like Florida’s milestone inspection, is an engineering assessment of whether the building is safe. Older buildings may need both.
What does “percent funded” mean?
It is the ratio of the actual reserve balance to the theoretical balance that would be in place if every component had been saved for in proportion to its age. It’s a snapshot, not a grade, so read it alongside the 30-year cash-flow plan.
Can owners see the reserve study?
In most jurisdictions, yes. Owners generally have a right to inspect association records, and some laws require the study or a summary to be distributed. Florida, for example, requires the SIRS to be made available to every unit owner.
Does a small HOA need a reserve study?
Even a small association of detached homes has roads, fences, pools or clubhouses that wear out. Some laws exempt small associations, but having a simple plan is still cheaper than an unplanned assessment.
Featured image: Rene Bieder renebieder via Wikimedia Commons, CC0.
