How Much Should an HOA Have in Reserves? Not a Budget Percentage

How much should an HOA have in reserves? Ask three board members and you will hear three answers: "10% of the budget" (soon 15%), "whatever the last study said," and "more than we have." The first one is the most popular and the least useful. The right amount depends on what your association owns, how old it is, and when each big item is due. A building with a new roof and a building with a fifteen-year-old roof can have the same budget and need very different reserve balances.

I have spent the last year building the financial engine that sits inside a reserve study: the part that takes a list of components and turns it into a 30-year plan. What follows is the same logic, written for a board member who wants to check their own fund without a spreadsheet.

Here is what matters most:

• The useful number is not a dollar figure or a budget percentage. It is percent funded: your reserve balance divided by the share of your components that has already worn out.
• Under about 30% funded, special assessments become likely. Between 30% and 70% is workable but fragile. Above 70%, special assessments are rare.
• The 10% of budget rule comes from lending guidelines, not from engineering, and Fannie Mae is raising it to 15% for loan applications from January 4, 2027. Neither number tells you whether your roof money will be there when the roof fails.
• The question that matters most is not "how much do we have" but "in which year does the money run out at our current contribution."
• You can check all of this in five minutes with our free HOA reserve fund calculator, using the numbers from your last reserve study.

Why "10% of the budget" became the default answer

The 10% figure is everywhere because lenders use it. When a buyer applies for a mortgage on a condo, the lender reviews the association's budget, and Fannie Mae has looked for at least 10% of budgeted assessment income going to reserves. Boards hear this from managers and realtors, and it becomes the rule.

That floor is going up. Fannie Mae's Lender Letter LL-2026-03, issued in March 2026, raises the minimum to 15% for loan applications dated on or after January 4, 2027. A board can still justify a lower figure with a current reserve study, but only if the budget adopts the highest funding level the study recommends. For many condos, 2027 budgets decide whether buyers can get a conventional mortgage in the building.

The problem is that a budget percentage measures how much you spend on operations, not how much your buildings will cost to maintain. A small, new community with low dues can hit 10% and still be far behind on a roof that is due in six years. A large, older community can put 25% of its budget into reserves and still be underfunded because three big items are due in the same decade.

Treat 10% (15% from 2027) as a floor that keeps your units financeable. It is not a measure of health.

What "fully funded" actually means

Every reserve study starts with a component list: roofs, paving, painting, pool, elevators, mechanical systems, anything the association must replace that costs enough to plan for. Each item has three numbers: what it would cost to replace today, how long it lasts (useful life), and how many years it has left (remaining life).

From those three numbers you can work out how much of each item has already been "used up." A roof that costs $480,000, lasts 25 years and has 9 years left is 16/25 used, so $307,200 of its value has been consumed. Add that up across every component and you have the fully funded balance: the amount you would hold today if the association had saved for everything on schedule since day one.

Percent funded is then simple:

percent funded = reserve balance ÷ fully funded balance

This is the number reserve professionals look at first, and it is the one your board should track year over year.

How to read your percent funded

The industry commonly groups percent funded into three bands:

• 0% to 30%: weak. The fund cannot absorb a major replacement. When the next big item comes due, a special assessment, a loan or a deferred repair is likely.
• 30% to 70%: fair. Most associations sit here. The fund works if the plan is followed and nothing surprises you, but one early failure or a cost spike can push it short.
• 70% and above: strong. Special assessments are rare at this level, and the board has room to handle surprises.

Being 100% funded is not a requirement, and very few associations are. What matters is the direction: is percent funded rising, flat or falling under your current contribution?

The question most boards never ask: when does the money run out?

Percent funded tells you where you stand today. The more practical question is what happens over the next 30 years at the contribution you are actually making. That is what the cash flow projection in a reserve study answers, and it is the page most boards skip.

Here is how it plays out. Maria is the treasurer of a 60-unit condo. The association holds $350,000 in reserves and contributes $60,000 a year, about $83 per unit per month. Their components include a roof, paving, exterior paint, a pool, an elevator, common area HVAC and a fire alarm system, with a combined fully funded balance of about $775,000. So they are 45% funded: fair, not alarming.

When Maria runs the 30-year cash flow at 3% construction inflation, the picture changes. Painting and paving come due early, the roof lands in year ten, and at $60,000 a year the fund goes negative that year and keeps falling. The shortfall at its lowest point is close to $1 million, which works out to roughly $16,000 per unit if it were collected as a special assessment.

Two contribution levels fix it:

• About $96,000 a year (roughly $133 per unit per month) is the minimum that keeps the balance above zero for all 30 years. This is called baseline funding.
• About $136,000 a year (roughly $190 per unit per month) reaches 100% funded by year 30. This is full funding.

That is the conversation a board actually needs to have: an increase of $50 to $107 per unit per month now, against a five-figure special assessment later. The numbers above come from the example values preloaded in our HOA reserve fund calculator. Put your own study's numbers in and you get your association's version in a few minutes.

Baseline, threshold or full funding: which should your board choose?

Reserve studies usually present more than one funding plan:

• Baseline funding keeps the balance above zero. It is the cheapest plan that technically works, and it has no cushion. If a component fails early or costs come in high, you are short.
• Threshold funding keeps the balance above a floor the board chooses, for example never below 30% funded or never below a fixed dollar amount. It is the middle path most boards pick.
• Full funding aims for 100% funded over time. It costs the most today and spreads the cost of wear fairly across owners, so the people living in the building while the roof wears out are the ones paying for it.

There is a fairness argument for full funding that boards rarely say out loud. When reserves are thin, owners who sell before the roof is replaced leave the bill to whoever owns the unit when the assessment hits. Funding closer to 100% means each owner pays for the wear that happens while they own.

What state law adds

Some states set rules on top of good practice, and they change often enough that you should check the current statute or ask your association's attorney.

Florida. Condominium buildings three or more stories tall must have a structural integrity reserve study covering roof, structure, fireproofing, plumbing, electrical, waterproofing, windows and doors, and other items over $25,000 that affect them. Since the end of 2024, associations can no longer waive or reduce reserve funding for those structural items. For many Florida boards, "how much should we have" now has a legal floor.

California. The Davis-Stirling Act requires a reserve study with a site inspection at least every three years and a review every year, and the board must disclose the reserve funding status to owners.

New Jersey. A 2024 law requires condominium associations to have a reserve study updated at least every five years, with a 30-year funding plan.

If your association is in one of these states, the reserve study is not optional, and the funding plan it sets is something owners and buyers will see.

Five things to check before your next budget meeting

1. Find your last reserve study and its date. If it is more than three years old, the costs in it are out of date. Construction costs have risen much faster than general inflation in recent years.
2. Write down your percent funded today, not the one in the study. Your balance and your components have both changed since then.
3. Look at the cash flow table, not just the summary. Find the year with the lowest balance under your current contribution.
4. Check that inflation in the study matches reality. A study that assumed 2% when costs are rising faster will understate every future replacement.
5. Ask what happens if your biggest item fails five years early. If the answer is a special assessment, your fund has no cushion.

Frequently asked questions

Is 10% of the budget enough for HOA reserves?

Not as a measure of health, and for condos it will soon not be enough for lenders either: Fannie Mae's minimum rises to 15% for loan applications from January 4, 2027. The figure is worth meeting so your units stay financeable. Whether it is enough depends entirely on what your association owns and when it is due. A reserve study or a percent funded check answers that; a budget percentage does not.

What percent funded is considered good for an HOA?

Above 70% is generally considered strong, 30% to 70% fair, and below 30% weak. More important than any single year is the trend. A fund at 50% that rises every year is in better shape than one at 65% that falls every year under the current contribution.

How often should an HOA update its reserve study?

Every three to five years with a site inspection is common practice, and some states require it, California every three years and New Jersey every five. Many boards also do a review without a site visit in between, so costs and balances stay current.

What happens if an HOA's reserves run out?

The board has three options when a major replacement comes due without enough money: a special assessment on owners, a loan repaid through higher dues, or deferring the repair. Deferral usually makes the eventual repair more expensive, and in states with structural reserve rules it may not be allowed for safety items.

Check your own fund

You do not need to wait for your next study to know where you stand. Open the HOA reserve fund calculator, replace the example components with the ones from your last study, and it will show your percent funded today, the year the money runs short at your current contribution, and the two contributions that fix it. It takes about five minutes and you do not need to give us an email.

If you prepare reserve studies for a living, the same engine drafts the full study from your inspector's notes and photos. See AI reserve study software.