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Calculate differences in repayment types
Want to know how your mortgage repayments will be affected on Principal & Interest (P&I) compared to Interest Only? Or, maybe you need to find out the total cost of an interest-only loan over the full loan term. The P&I and Interest Only calculator is your one-stop shop to crunch your repayment costs!
The P&I and Interest Only Calculator is here to help you decide which repayment type is right for you and your budget.
As a general guide:
- Paying P&I will help you pay off the mortgage sooner, ideal for those who want to own a home outright.
- Interest Only loans are popular among investors, who are looking to maximise cash flow and return on investment.

Need a hand?
Remember, you can talk directly to one of our accredited Personal Finance Managers on 1300 REDUCE (733 823). They’ll answer any of your questions and you can even apply for a home loan on the spot.
Want a call back? Fill in a no-obligation enquiry form or speak to our live chat representatives and the next available Personal Finance Manager will call you back.
HOME LOAN CALCULATORS
Extra repayment calculator
Pay off your loan quicker with extra repayments. Find out how much quicker with this calculator.
how much can i borrow?
Find out how much you can expect our funders to lend you based on your income and living expenses.
Mortgage offset calculator
With an offset account attached to your loan, you can reduce the amount of interest you pay.
P&I / Interest only calculator
Compare repayments between principal and interest, and interest only options, or find the total cost of these loans.
stamp duty calculator
Purchasing a property? Find out how much stamp duty you’ll pay based on your state and purchase price.
FINANCE CALCULATORS
BUDGET CALCULATOR
Curious about your own budget? Calculate your finances and figure out your cash flow here.
savings goal calculator
If you’ve got a goal for your savings, this calculator can help you understand how long till you reach it.
compound interesT
Calculate how much you can save with regular deposits in a savings account accruing interest over time.
Income tax calculator
Find out exactly how much government tax you would pay based on your annual income.
what can i afford to borrow?
How much can you really afford? This calculator helps you determine your maximum borrowing power.
Why choose Reduce?
COMPARE OUR HOME LOANS
Compare rates, features and fees across all our home loans in this easy table.