Construction Loan Calculator Australia 2026 — Progressive Drawdown Estimator

Model your construction loan using the 5 standard Australian build stages. See your IO payment at each drawdown, total interest during the build, and your P&I repayment once construction is complete. Works for house-and-land packages, knock-down-rebuilds, and granny flat construction.

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Enter your details above to get instant, accurate results. Our calculator uses current Australian rates and rules — updated regularly.

Need help? Our guides explain how each calculation works and what the results mean for you.