Due Diligence
How to Read a Condo Reserve Study Like a Pro
J.A. Watte
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7 min read
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Updated 2026-04-12
The Most Important Document in Condo Due Diligence
A reserve study is a crystal ball for condo investors. It tells you what's going to break, when it's going to break, and whether the HOA has enough money to fix it. If the answer is no, a special assessment is coming — and you'll pay your share.
Here's how to read one in 15 minutes and know whether to buy or walk away.
What's Inside a Reserve Study
A professional reserve study (typically conducted by a reserve study firm or structural engineer) contains three main sections:
1. Component inventory: A list of every major building element with its current condition, estimated useful life, and replacement cost. Examples: Roof — installed 2010, useful life 25 years, replacement cost $450,000, remaining life 9 years. Elevator — installed 2005, useful life 25 years, modernization cost $180,000, remaining life 4 years. Parking lot — resurfaced 2018, useful life 15 years, cost $120,000, remaining life 7 years.
2. Funding analysis: How much the HOA currently has in reserves, how much it needs, and the annual contribution required to stay on track. This section generates the percent funded figure — the most important number in the study.
3. Funding plan: A 20-30 year projection showing annual reserve contributions, expected expenditures, and projected reserve balance. Look for years where the balance drops to zero or negative — those are when special assessments become necessary.
The Three Numbers That Matter Most
1. Percent funded: Current reserve balance / Fully funded balance x 100. Above 70%: well-funded. 50-69%: adequate but watch it. Below 50%: underfunded, special assessment risk is high. Below 30%: critical — run away unless you're getting a massive discount on purchase price.
2. Annual contribution vs. required contribution: Is the HOA actually contributing enough each year? Many boards underfund reserves to keep monthly dues low. If the study says $150K/year is needed and the HOA is only contributing $80K/year, the fund is falling further behind every year.
3. Major expenses in the next 5 years: Look at the component list for items with 1-5 years remaining life. These are the costs you'll face as an owner. A $450K roof in 3 years with only $200K in reserves means a $250K shortfall — potentially $2,500-$5,000 per unit in assessments. For a complete framework on evaluating HOA financials and reserve health, The Condo Trap provides a scoring system that rates HOA financial strength across all the key metrics.
Red Flags in Reserve Studies
No reserve study exists: The HOA either hasn't commissioned one or is hiding the results. Major red flag. Walk away or demand one as a condition of purchase.
Study is more than 5 years old: Costs and timelines have changed. The data is unreliable.
"Threshold funding" or "baseline funding" method: These are funding strategies that deliberately keep reserves low and plan for special assessments. "Full funding" or "statutory funding" methods are what you want.
Unrealistic cost estimates: If the study says a roof replacement costs $200K but local contractors quote $400K, the entire funding analysis is wrong.
Declining reserve balance in the projection: If the 20-year projection shows the balance going to zero in year 8, that's when the special assessment hits.
How to Use the Study in Negotiations
If the reserve study reveals underfunding or near-term major expenses, you have two options: reduce your offer by your estimated share of future assessments, or walk away.
Example: Reserve study shows 40% funding and a $300K elevator modernization needed in 2 years. There are 80 units. Your share: roughly $3,750. Plus the ongoing underfunding suggests more assessments to come. Reduce your offer by $5K-$10K to account for the risk — or find a better-funded building.
The Bottom Line
The reserve study tells you whether the building can pay its bills or whether you'll be writing surprise checks. Read it before making an offer. Check the percent funded (70%+ is your target), verify the HOA is contributing enough annually, and identify any major expenses in the next 5 years. A 15-minute review of this document can save you tens of thousands of dollars.
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Written by J.A. Watte
Author of six books totaling 2,611 pages — The W-2 Trap, The $97 Launch, The Condo Trap, The Resale Trap, The $20 Agency, and The $100 Network. Practical strategies for building income outside traditional employment.
FAQ
What is a condo reserve study?
A reserve study is a professional report that inventories all major building components (roof, HVAC, elevator, parking, plumbing), estimates their remaining useful life, and calculates how much the HOA needs to save annually to replace them without special assessments.
What is a good reserve funding percentage?
70% or higher is considered well-funded. 50-69% is marginally funded — adequate for now but vulnerable to unexpected costs. Below 50% is underfunded and almost guarantees future special assessments. Below 30% is critical.
How often should a reserve study be updated?
Industry standard is every 3-5 years, with annual updates to the financial projections. Many states now require regular reserve studies by law, especially after the Surfside condo collapse prompted legislative action.