Run the numbers
before you talk to us.
Six calculators for buying or building in Perth and WA. Each one shows a result instantly, in your browser, with no detail required up front.
Last updated 14 June 2026
The Property Plug publishes six free property finance calculators for Perth and WA buyers: borrowing power, loan repayment, deposit and LMI, WA stamp duty, a first home incentive estimator and a rental yield and cashflow tool. Each shows an instant browser-side estimate and is general information only, not credit advice.
All six calculators
Borrowing power
A conservative guide to how much you might borrow, assessed at a lender-style buffer rate.
Open calculator →Loan repayment
Principal-and-interest or interest-only repayments at any rate, term and frequency.
Open calculator →Deposit & LMI
Your loan-to-value ratio and an indicative Lenders Mortgage Insurance premium.
Open calculator →WA stamp duty
Transfer duty on a home or block, with the first-home exemption and concession built in.
Open calculator →First home incentive estimator
The $10,000 grant, your stamp duty saving and the deposit gap, stacked in one place.
Open calculator →Yield & cashflow
Gross yield, net yield and weekly cashflow on a new build or granny flat investment.
Open calculator →Pick the right one
| Calculator | Answers | Best for |
|---|---|---|
| Borrowing power | How much you might borrow | Everyone, first step |
| Loan repayment | Weekly or monthly repayment | Budgeting a loan |
| Deposit & LMI | Your LVR and LMI cost | Low-deposit buyers |
| WA stamp duty | Transfer duty payable | Any WA purchase |
| First home incentive | Grant + duty saving + gap | First home buyers |
| Yield & cashflow | Yield and weekly cashflow | Investors |
This is general information only and does not take into account your objectives, financial situation or needs. It is not credit assistance or a credit quote. Consider whether it is right for you and seek advice. Finance is arranged through Central Lending Solutions, the licensed credit partner The Property Plug works with (Australian Credit Licence or credit representative number [TBC]).
Are these calculators accurate?
They give a sound indicative estimate using standard formulas (annuity maths for repayments, the WA duty scale for stamp duty, present value for borrowing power). They are general information only and not a quote. Your lender uses their own policy, rates and assessment, so your real numbers can differ.
Do I have to enter my contact details?
No. Every calculator shows a result instantly in your browser before you give us anything. You only share details if you want us to turn the estimate into a real strategy and lender comparison.
Which calculator should I start with?
First home buyers usually start with the first home incentive estimator and the deposit and LMI calculator. Investors start with yield and cashflow. Anyone building should run the borrowing power and repayment tools together to size a realistic build budget.
Turn an estimate into a plan
Once you have a number, book a free finance call and we will pressure-test it against real lender policy at no cost to you.