Calculators
HOA Reserve Fund Calculator
Calculate an HOA's fully funded reserve balance, percent funded and the annual contribution needed to keep up with component replacements.
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The tool
Enter your numbers below. Results update as you type, and nothing leaves your browser.
Everything you enter stays on your own machine. Nothing is sent to us or to anyone else, which you can confirm in your browser network tab.
What people use it for
- Board budget planning
- Buyers checking an association's health
- Explaining dues increases to owners
- Preparing for a reserve study
About this tool
What the HOA Reserve Fund Calculator does
Homeowners associations save reserves for replacing roofs, paving, lifts and other components. A reserve study compares the actual reserve balance with the fully funded balance (the share of each component’s life already used up times its replacement cost). The ratio is the percent funded.
It also works as a HOA reserve fund adequacy calculator or a reserve study calculator.
Formula
- Fully funded balance = Σ replacement cost × (useful life − remaining life) ÷ useful life
- Percent funded = reserve balance ÷ fully funded balance
- Annual contribution = Σ replacement cost ÷ useful life
Worked example
Using the starting values in the calculator above:
| Input | Value |
|---|---|
| Components | 5 entries |
| Current reserve balance | $300,000 |
| Units in the association | 120 |
| Result | Value |
|---|---|
| Percent funded | 49.6% |
| Funding position | Fair (30% to 70%) |
| Fully funded balance | $605,333 |
| Shortfall against fully funded | $305,333 |
| Annual contribution (full funding) | $53,133 |
| Per unit per month | $36.90 |
How to read the result
Associations below about 30% funded face a higher risk of special assessments when a major component fails.
The annual contribution here is a simple straight-line figure without inflation or interest; a professional reserve study models both.
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Questions
Questions about this tool
The things clients actually want to know — costs, timelines, ownership and what happens after launch.
Reserve balance as a share of the fully funded balance, the amount that should have been saved for components' used-up life.
Many reserve specialists consider 70% or more strong and under 30% weak.
Often every three to five years with annual updates; some states set requirements.
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