Reserve Contribution Calculator for HOAs and Condos

A reserve contribution is the money an association sets aside each year to replace its shared components. For each component, take the future replacement cost, subtract what is already saved for it, and divide by the years remaining. This calculator does that for every row and adds them up.

%
How fast replacement costs rise each year. 3% is a common assumption.
Homes or units that share the cost. Used for the monthly amount per unit.

Components

Replacement cost is today's price. Remaining life is the years until it is due. Current allocation is what is already saved for it (0 is fine).

Component Replacement cost today ($) Remaining life (yrs) Current allocation ($) Remove

Your result

Add at least one component with a cost and a remaining life, and the result appears here.

total annual contribution

per unit, per month

unfunded and due this year

How this was calculated

Future cost = Current replacement cost x (1 + inflation) ^ Remaining useful life Annual contribution = (Future cost - Current allocation) / Remaining useful life Total annual = Sum of the annual contributions Monthly per unit = Total annual / 12 / Units

With your inputs

Component Cost today Remaining life Future cost Already allocated Annual contribution
Total annual contribution

This funds each component separately. A pooled (cash-flow) plan is usually lower and smoother, because money saved for a distant project can cover a nearer one in the meantime. Model that with the 30-Year Reserve Funding Projection.
Please note. This is an estimate for planning conversations, not a reserve study. Reserve studies are prepared by qualified professionals following the National Reserve Study Standards.

Run this for every component, every year, in ReservePath

Start a 30-day free trial, no card needed. Keep the full component inventory, the 30-year plan and the report in one place.

Frequently asked questions

How do you calculate an HOA reserve contribution?

For each component, inflate today's replacement cost to the year it is due, subtract what is already set aside for it, and divide by the years remaining. Add the results for every component to get the annual contribution.

What inflation rate should I use?

This calculator starts at 3%, a common planning assumption. Construction costs can run higher or lower in your area, so use the rate from your reserve study or a recent local bid if you have one.

What does "current allocation" mean?

It is the part of today's reserve balance that is earmarked for that component. If your reserve fund is one pooled account, you can leave it at 0 for every row, or split the balance across the components yourself.

Why is the pooled contribution usually lower?

This calculator funds each component on its own, which is called the component or straight-line method. A pooled, cash-flow plan lets money set aside for a far-off project cover a nearer one in the meantime, so the total needed each year is usually lower and steadier.

What if a component is due this year?

A component with 0 years remaining needs its full cost now. The calculator shows the unfunded amount as due this year instead of dividing by zero.