Free property investment calculators for the numbers investors keep rebuilding.
Run yield, cash flow, land tax, stamp duty, depreciation, loan and portfolio calculations before the numbers become a purchase, refinance or tax decision. No signup required.
Calculator workspace
Purchase, holding, tax and finance checks
Rental Yield Calculator
Check whether the rent supports the purchase price before you compare the deal.
Stamp Duty Calculator
Bring the state duty cost into the purchase budget before you make an offer.
Cash Flow Calculator
See whether the property creates surplus cash or needs a monthly buffer.
Rental Increase Calculator
Model the annual effect of a rent change before you update the lease numbers.
Offset Account Calculator
Estimate the value of cash buffers sitting against an investment loan.
Refinance Calculator
Check whether a lower rate is enough to justify the discharge and setup costs.
free calculators for Australian property investors
tax, duty and land-tax pages kept current for planning
signup required before you run the first numbers
Calculator library
Choose the number you need for the decision in front of you.
These free Australian property investment calculators are grouped by the jobs investors repeat: buying, holding, refinancing, tax planning and portfolio growth.
Buy
Work out entry costs, yield and purchase pressure before the numbers move into the portfolio.
Calculate gross and net rental yield on any Australian investment property.
Calculate stamp duty across all Australian states for investment properties.
Hold
Check rent movement, cash flow and day-to-day holding decisions.
Analyse weekly, monthly, and annual cash flow including tax benefits.
Calculate a fair rent adjustment and see the impact on your annual returns.
Refinance
Compare loan changes, repayments and offset value before changing lenders or structure.
See how much interest your offset account saves over the life of your loan.
Compare your current loan with a new rate - see if switching is worth the costs.
Compare P&I vs interest-only repayments on investment property loans.
Tax
Estimate land tax, depreciation, deductions, gearing and sale outcomes.
Estimate your negative gearing tax benefit based on income and expenses.
Interactive checklist of every deduction you can claim - estimate your tax savings.
Estimate Division 40 and Division 43 depreciation claims by property type and age.
Calculate land tax across all Australian states with 2025-2026 thresholds.
Estimate CGT on property sale with the 50% discount for assets held 12+ months.
Portfolio
Look across equity, returns and growth decisions instead of one property at a time.
Calculate usable equity across your portfolio for your next property purchase.
Calculate total returns across your portfolio - capital growth, yield, and equity.
Why use property investment calculators?
Property investment in Australia involves complex financial calculations - from stamp duty that varies by state to negative gearing tax benefits that depend on your marginal tax rate. Our free calculators help you quickly evaluate potential investments and understand the true cost of ownership before committing.
Whether you are buying your first investment property or expanding an existing portfolio, these tools give you the numbers you need to make informed decisions. All calculations use current Australian tax rates and state-specific rules.
Next step
Turn one-off calculations into a live portfolio view.
PropBoss tracks rental income, expenses, bank feeds, depreciation, loans, tax records and portfolio decisions in one operating system, so the numbers stay useful after the calculator closes.