Let's consider a simplified example to illustrate how the calculator processes information:
- Initial Savings: $100,000
- Home Loan Balance: $500,000 @ 6% interest
- Marginal Tax Rate: 32.5%
- Investment Property (Scenario 3): Purchase Price $600,000, Rental Income $25,000/year, Expenses $35,000/year (including interest on $480,000 loan at 7%), Capital Growth 5% p.a.
Scenario 1 (No Investment): Your savings remain in a low-interest account, and your home loan interest continues as usual.
Scenario 2 (Mortgage Offset): The $100,000 in savings reduces your effective home loan balance to $400,000, saving you interest on $100,000. This saving is tax-free.
Scenario 3 (Invest Savings): You use the $100,000 as a deposit for the investment property. The property generates a negative cash flow of $10,000 ($25,000 income - $35,000 expenses). This $10,000 loss is deductible against your taxable income, providing a tax saving of $3,250 (32.5% of $10,000). The property also grows in value by 5% annually.
The calculator then aggregates these figures over your chosen period, factoring in compounding interest, capital growth, and tax benefits to show the projected net wealth for each scenario.