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Investment property calculator

Enter the price, the loan, the rent and the costs. You'll see the cash you need on day one, the repayments, and what the property costs or pays each week before and after tax in its first year.

Defaults are Ku-ring-gai’s March 2026 quarter medians: $1,170,000 for strata sales (NSW sales tables) and $830 a week for units (NSW rent tables).

6.47% is the RBA’s average investor variable rate on existing loans for August 2026 (RBA table F6), before the 30 September rise.

Costs and depreciation start at zero because only you know them: rates, strata, insurance, repairs and land tax are deductible straight away (ATO, rental expenses). NSW transfer duty is added for you.

Weekly cash flow after tax—Ask us how a lender would assess this →
Cash needed to buy—

The first year

What the calculator follows

The cash needed is the price less the loan, plus NSW transfer duty from the same verified brackets as our stamp duty calculator (no first home concessions on an investment), plus your other buying costs. Rent is collected for the weeks the property is let, less management and running costs. Interest, costs and depreciation are deducted for tax at the 2026–27 resident rates plus the Medicare levy, under the rule that applies to when you bought: from 1 July 2027 an established home bought after Budget night can’t be negatively geared against salary.

It covers the first year only, with one rate and no growth in rent, value or costs. Moneysmart’s warning applies: don’t rely on rent to cover the mortgage, because there may be times when the property is empty. The land tax calculator gives the land tax figure to put in the costs, and the negative gearing calculator shows the tax on its own. This page is general information, not tax or financial advice.

Looking at an investment property? We'll show you how lenders will count it.

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Investment property calculator questions

Is principal a cost?

No. On a principal and interest loan, part of each repayment reduces the debt, which is your money turning into equity. It still leaves your bank account, so the calculator counts it in the cash flow and shows it separately. Only the interest is deductible.

Can I still negatively gear an investment property?

Properties held, or under contract, before 7:30 pm AEST on 12 May 2026 keep the old treatment, and so do new builds. An established home bought after that can be negatively geared until 30 June 2027; from 1 July 2027 its loss can only offset residential property income and capital gains, with the rest carried forward.

Which costs can I deduct straight away?

Interest, council rates, land tax, insurance, agent fees, repairs and strata levies, among others. Stamp duty and buying costs can't be deducted; they go into the cost base for capital gains tax instead. Borrowing costs over $100 are spread over five years.

Why doesn't it show capital growth?

Because that would be a guess. Moneysmart's warning is the right one: don't rely on rental income to cover the mortgage, because there may be times the property is empty. The calculator shows what the property costs you to hold; whether growth makes up for it is your judgement.

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