Free Property Tools
Property Investment Calculators
Free property investment calculators for Australian investors, accountants, and mortgage brokers. Tax depreciation estimator, CGT calculator, rental yield, stamp duty, loan repayment, and equity unlock tools — all built on real data from Koste's national database.
Available Calculators
Tax Depreciation Calculator
Estimate your Division 40 and Division 43 deductions. See how much you can claim in the first year.
Capital Gains Tax Calculator
Calculate your CGT liability when selling an investment property, including the 50% discount and depreciation recapture.
CGT Method Comparison
Compare the old 50% CGT discount vs the 2026 Budget inflation-adjusted model. See which saves you more.
ROI Calculator
Calculate total return on investment including rental yield, capital growth, tax depreciation, and negative gearing.
Stamp Duty Calculator
Instant stamp duty estimates for all Australian states, including investor rates and first home buyer concessions.
Loan Repayment Calculator
Compare interest-only vs principal & interest repayments and see total interest cost over the loan term.
Equity Unlock Calculator
Find out how much equity you can unlock from your portfolio to fund your next investment purchase.
Rental Yield Calculator
Calculate gross and net rental yield factoring in expenses, vacancy rates, and depreciation benefits.
Construction Cost Calculator
Estimate residential and commercial build costs per square metre using current BCI rates.
All calculators are powered by Koste Chartered Quantity Surveyors — AIQS & RICS members. Results are estimates only; contact Koste for a detailed assessment. 1300 669 400 · info@koste.ai