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Plinth

Free tool · Australia

Six numbers about the building. No login, no email. It runs the same engine as the paid product.

Your building

Six numbers. Everything recomputes as you type.

We build a starter register from your building’s age, type and size, then project the fund 15 years. Indicative only — a real plan uses your actual register.

Underfunded

On the current levy, the fund runs short in 2040.

Recommended levy

$63,000

$3k above current

Runs short

2040

fund goes negative

15-yr works

$1.3m

escalated to 2040

Lowest balance

−$3k

in 2040

Reserve balance — 2026 to 2040

Your fund, year by year, against the safety floor.

−$34k$115k$264k$413k$562kSafety floor $50kRuns short 2040Now'27'29'31'33'35'37'39'40

This is the same engine behind Plinth — refine it with your real register on a live plan.

Questions

Is it really free?
Yes — no login, no email. Enter six numbers and read the answer.
How accurate is it?
It's an indicative first read. It builds a starter register from your building's age, type and size, then runs Plinth's real forecasting engine. A formal plan uses your building's own register, genuine quotes and a condition assessment.
What is the recommended levy?
The flat annual contribution that keeps the fund above its safety floor in every year of the projection — the levy that avoids a special levy later.
Does it work in NSW, VIC and QLD?
Yes. Only the name changes — capital works fund in NSW, maintenance fund in VIC, sinking fund in QLD. The maths is the same.

The calculator is a snapshot. The plan is the thing that stays true — with your real register, your documents and your renewals.