Sinking Fund Calculator

See whether your sinking (capital works) fund is on track to cover an upcoming major-works cost — and how big any shortfall is.

We grow your current balance by your annual contributions (plus any interest) up to the year of the works, then compare it to the estimated cost.

Current Fund Balance

The current balance of your sinking / capital works fund.

Annual Contribution to the Fund

How much the scheme pays into the fund each year (the sinking-fund portion of levies).

Estimated Cost of Works

The estimated cost of the upcoming major works (e.g. roof, lifts, painting, plumbing).

Years Until the Works

How many years from now the works are expected (1–40).

Add interest and lot count for a more precise, per-lot result.

Fund Interest / Growth Rate (%)

Interest the fund earns each year. Leave blank to assume none.

Number of Lots in the Scheme

Used to show any shortfall as a special levy per lot.

Enter your fund balance, the works cost, and how many years away they are

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Sinking Funds & Capital Works — Common Questions

What is a sinking fund (capital works fund)?: A sinking fund — called a capital works fund in NSW and an administrative/sinking fund split in other states — is money a body corporate sets aside for large, infrequent expenses like roof replacement, repainting, lift upgrades, and major plumbing. It's separate from the administrative fund, which covers day-to-day running costs.
How much should be in a sinking fund?: There's no single right number — it depends on the building's age, size, and the works coming up in its capital-works plan. A common approach is to commission a quantity surveyor's 10-year forecast and set contributions so the fund can meet each major expense as it falls due. This calculator helps you sanity-check the fund against one upcoming cost.
What happens if the sinking fund is short?: If the fund can't cover scheduled works, owners typically face either a special levy (a one-off charge per lot) or an increase in ongoing contributions — sometimes both. Planning ahead and raising contributions gradually is usually cheaper and less disruptive than a large surprise special levy.