The most expensive surprise in HOA ownership is rarely the monthly fee. It is the letter that arrives eighteen months after closing announcing that every owner owes several thousand dollars, because the roofs are at the end of their life and the association did not save for them.
This is the dominant pattern in community associations right now. Repairs can only be deferred for so long, construction and insurance costs have risen faster than dues, and associations that kept assessments artificially low for years are now facing bills they cannot spread out. The people who absorb it are frequently the newest owners, who bought in without reading the one document that predicted the whole thing.
The useful part: reserve underfunding is disclosed. It is legible before you buy, if you know which number to look at.
What a reserve actually is
An association has two pots of money. The operating budget covers recurring costs: landscaping, management, utilities, insurance premiums. The reserve fund covers the replacement of major shared components with a predictable lifespan: roofs, roads, elevators, siding, pools, boilers, plumbing risers.
A reserve study is the professional estimate of what those components are, how much life each has left, what replacement will cost, and how much the association should contribute annually to be ready. It produces the two numbers that matter to a buyer: percent funded and the recommended annual contribution.
Reading the percent funded number
Percent funded compares what the association has saved against what it ideally should have saved by now, given the age and condition of its components. The reserve study profession commonly reads it like this:
- Above 70%: strong. Special assessment risk is low.
- 30% to 70%: fair. Manageable with a credible funding plan.
- Below 30%: weak. Special assessment risk rises sharply.
These are industry conventions, not legal thresholds, and a low number by itself is not proof of a problem. What matters is the combination. An association at 25% funded with no component near end of life and a plan to increase contributions is in a very different position from one at 25% funded with 30-year-old roofs and no plan at all. Read the percentage next to the component table, never alone.
Why your lender cares too
Reserve funding is not only a budgeting question. It can determine whether the property is financeable.
Fannie Mae has long expected condo project budgets to allocate at least 10% of annual assessment income to replacement reserves. Under Lender Letter LL-2026-03, that threshold rises to 15%, effective January 4, 2027. There is an important exception: the budget allocation requirement does not apply where the association has a reserve study conducted or updated within the last three years and is funding at the study's highest recommended level.
The practical consequence for a buyer is that an underfunded association can become harder to buy into and harder to sell out of, because some lenders will not finance units in projects that fail these standards. That affects your resale pool, not just your budget.
What your state requires
Requirements vary enormously. Roughly a dozen states mandate reserve studies or reserve funding by statute: California, Florida, Hawaii, Maryland, Massachusetts, Minnesota, Nevada, New Jersey, Oregon, Utah, Virginia and Washington. Another group, including Colorado, Delaware, Illinois, Indiana, Kentucky, Michigan, New York, Ohio, Tennessee and Wisconsin, imposes conditional requirements that apply only to certain association types or can be waived by an owner vote.
Two specifics worth knowing:
- Florida rewrote its rules after the 2021 Surfside collapse. Condominium buildings three stories and higher must now obtain Structural Integrity Reserve Studies covering specified structural components, with reserves dedicated to them.
- Michigan's Condominium Act directs associations to allocate at least 10% of the annual budget toward reserves.
In a state with no requirement, an association may simply have no reserve study. That absence is not neutral. It means nobody has professionally estimated what is coming, including the board. Check the rules for your state.
Six warning signs in the documents
1. No reserve study, or one more than three years old
Component costs have moved sharply. A study from 2019 is describing a construction market that no longer exists, and its funding recommendations are almost certainly too low.
2. Actual contributions below the study's recommendation
Compare the reserve line in the current budget against the study's recommended annual contribution. A board that recommends $180,000 and budgets $60,000 is choosing a future special assessment. This single comparison is the highest-value thing in the entire packet.
3. A major component near end of life
Scan the component table for anything with two or three years of remaining life and a large replacement cost. Roofs, elevators, siding and plumbing risers are the usual candidates. Remaining life near zero plus low percent funded is the classic setup for an assessment.
4. Dues that have not risen in years
This reads as good news and usually is not. Costs rose. If dues did not, either service was cut or reserves were starved. Flat dues across five years in an inflationary period is a question, not a feature.
5. Borrowing from reserves for operating costs
Look in the minutes and the financial notes for transfers out of reserves to cover operating shortfalls. It is sometimes permitted with a repayment plan, but it means the operating budget is structurally too small.
6. Assessment discussion in the minutes
Boards discuss special assessments for months before they vote. A proposal that has been raised but not adopted appears nowhere in the formal disclosure packet. It appears in the minutes. Read them.
If you already own
You have more leverage than you think, but it is slow leverage. Request the current reserve study and budget, which owners are generally entitled to inspect. Compare contribution against recommendation. If there is a gap, raise it at an open meeting and ask for the funding plan in the minutes, because a documented request changes the conversation later. Gradual dues increases are almost always cheaper per owner than a lump-sum assessment, and boards often need owner pressure to choose the unpopular option early.
If an assessment has already been levied, read the CC&Rs for the association's collection and lien powers before deciding how to handle payment. What happens when HOA debt goes unpaid covers where that can lead.
The short version
Two comparisons carry most of the risk. First, the reserve study's recommended annual contribution against the reserve line in the actual budget. Second, percent funded against the remaining life of the most expensive component. If the budget is short and something big is nearly due, you are looking at a future bill with your name on it.
Both numbers are in documents you receive before closing. AskHOA reads the full packet, surfaces the financial and enforcement warnings, and quotes the exact clause and figure behind each one so you can check it against the source rather than take a summary on faith.
This guide is general information, not legal or financial advice. Reserve requirements and disclosure obligations vary by state and by association. Consult a qualified professional about your specific situation.