Run the numbers before you commit.

Your repayment

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Then principal & interest

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Total interest

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Total cost of the loan

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You may be able to borrow around

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Net monthly income

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Monthly expenses & commitments

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Monthly surplus

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Repayment at your rate

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Assessment rate used

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Income tax estimated on — resident rates. Every lender assesses income, expenses and commitments differently, so a real capacity figure can be meaningfully higher or lower. This is not a pre-approval.

Estimated duty payable

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Rate scale applied

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Duty before concessions

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Concession

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Transfer duty

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Foreign purchaser surcharge

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Rates for — as at —. Duty rates and concessions change often. Grants such as the First Home Owner Grant are cash payments, not duty reductions, and are not included. Confirm any figure with the relevant state revenue office or your conveyancer before you rely on it.

Interest you would save

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Loan paid off

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New loan life

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Total repayment each period

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Interest without extra repayments

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Assumes the rate and the extra repayment both stay unchanged for the life of the loan. Fixed-rate loans usually cap extra repayments — check your product before relying on this.

Interest you would save

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Loan paid off

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New loan life

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Interest saved in month one

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Interest with no offset

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Assumes a full 100% offset against a variable principal-and-interest loan, and that the balance stays in the account. Offset accounts sometimes carry a higher rate or an annual package fee — worth weighing up.