Savings .com.au

Interest-only mortgage repayment calculator

Savings.com.au’s interest-only home loan calculator allows you to compare interest-only (IO) home loans with principal and interest (P&I) loans, seeing how much more you could pay in the long term despite reduced interest-only repayments in the short term.

To use our interest-only home loan calculator, enter:

  • The loan amount
  • The interest rate of the loan
  • The loan term (number of years of the entire loan) and the interest-only period (in years)
  • Any monthly fees

You can see the extra you will pay in total interest as well as compare repayments for both interest-only and principal and interest loans.

What is an interest-only mortgage?

Interest-only loans are home loans which delay the repayment of the borrowed amount (the ‘principal’) for a fixed term, usually three to five years. This means for a period, generally at the beginning of the loan, the borrowers only repay the interest component of their home loan, before it reverts to repaying both principal and interest.

Why switch to an interest-only home loan?

Interest-only home loans can be described as “less now, more later” as repayments for a few years will be significantly lower but can be considerably higher once the interest-only period ends. They’re particularly attractive to some investors who can buy property while maximising their cash flow and increase the tax-deduction capacity of their loans.

As an example of how interest-only loans can cost less up front but be more expensive later on, let’s look at a $400,000 home loan with a 4.00% p.a. interest rate over 30 years:

  • With a five-year IO period, monthly repayments would be $1,333 before reverting to $2,111 for the remaining 25 years
  • With a simple P&I loan, the monthly repayments remain constant at $1,910

The IO loan will cost the borrower $313,400 in total interest, while the P&I option will cost around $287,500 - a difference of nearly $30,000.

Learn more about the pros and cons of interest-only home loans.


Looking for a home loan?

Buying a home or looking to refinance? The table below features home loans
with some of the lowest interest rates on the market for owner occupiers.

Lender

Variable
More details
4.6 Star Customer Ratings
  • Available for purchase or refinance, min 10% deposit needed to qualify.
  • No application, ongoing monthly or annual fees.
  • Quick and easy online application process.
Disclosure
4.6 Star Customer Ratings

loans.com.au – Variable Home Loan (LVR < 90%)

  • Available for purchase or refinance, min 10% deposit needed to qualify.
  • No application, ongoing monthly or annual fees.
  • Quick and easy online application process.
Disclosure
Variable
More details
Apply in minutes
  • No application or ongoing fees. Annual rate discount
  • Unlimited redraws & additional repayments. LVR <80%
  • A low-rate variable home loan from a 100% online lender. Backed by the Commonwealth Bank.
Disclosure
Apply in minutes

Unloan – Variable Rate Home Loan LVR < 80%

  • No application or ongoing fees. Annual rate discount
  • Unlimited redraws & additional repayments. LVR <80%
  • A low-rate variable home loan from a 100% online lender. Backed by the Commonwealth Bank.
Disclosure
Variable
More details
  • No annual fees – None!
  • Get fast pre-approval
  • Unlimited additional repayments free of charge
Disclosure

ubank, part of NAB – Neat home loan - max. 60% LVR (Owner occupied, Principal and interest)

  • No annual fees – None!
  • Get fast pre-approval
  • Unlimited additional repayments free of charge
Disclosure
VariableN/AN/A
More details

Sucasa – Ultra Low Rate (Variable) - <98% LVR - No LMI (Refinance)

    Variable
    More details
    Disclosure

    ANZ – Simplicity PLUS Home Loan (Principal and Interest) (LVR < 70%) (New Customer) Special offer

      Disclosure
      VariableN/A
      More details
      Disclosure

      Commonwealth Bank – Extra Home Loan (Principal and Interest) (LVR 60%-70%)

        Disclosure
        Variable
        More details

        ING – Mortgage Simplifier ($150k+ where LVR >90% - O/Occ) P&I

          Variable
          More details
          Disclosure

          NAB – Tailored Home Loan Variable Rate - Principal and Interest LVR 60% or less

            Disclosure
            Variable
            More details
            Disclosure

            Westpac – Flexi First Option Home Loan (Promo) - Principal & Interest (LVR up to 70%)

              Disclosure
              Variable
              More details
              Disclosure

              ubank, part of NAB – Neat home loan - max. 80% LVR (Owner occupied, Principal and interest)

                Disclosure
                Variable
                More details
                • No application, ongoing monthly or annual fees.
                • Available for refinance or purchases. Quick and easy online application process.
                • Dedicated loan specialist throughout the loan application.
                • Discounted interest rate for 5 years for homes with an eligible solar system
                Disclosure

                loans.com.au – Solar Home Loan (Principal & Interest) (LVR < 90%)

                • No application, ongoing monthly or annual fees.
                • Available for refinance or purchases. Quick and easy online application process.
                • Dedicated loan specialist throughout the loan application.
                • Discounted interest rate for 5 years for homes with an eligible solar system
                Disclosure
                Variable
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                Great Southern Bank – Offset Variable - Owner Occupier Principal & Interest (LVR is 70%)

                  Variable
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                  MOVE Bank – Offset Home Loan (Principal & Interest) LVR <80%

                    Variable
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                    Bank of Queensland – Owner Occupied Economy Discount Rate (max 80% LVR)

                      Variable
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                      Athena Home Loans – Straight Up Owner Occupied - Obliterate (LVR < 50%) (Principal and Interest)

                        Variable
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                        Heritage Bank – Home Advantage Variable $250,000 to $699,999 >70% to 80%

                          Variable
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                          BankSA – Basic Home Loan for Owner Occupier P&I (Promo) (LVR below 70%)

                            Variable
                            More details

                            IMB Bank – Essentials Home Loan (Principal and Interest) (LVR 80%-90%)

                              Variable
                              More details

                              Credit Union SA – Owner Occupied Variable Home Loan Package (Principal and Interest)

                                Variable
                                More details
                                Disclosure

                                NAB – Tailored Home Loan Variable Rate - Principal and Interest LVR 60.01% - 70%

                                  Disclosure
                                  Important Information and Comparison Rate Warning

                                  Base criteria of: a $400,000 loan amount, variable, fixed, principal and interest (P&I) home loans with an LVR (loan-to-value) ratio of at least 80%. However, the ‘Compare Home Loans’ table allows for calculations to be made on variables as selected and input by the user. Some products will be marked as promoted, featured or sponsored and may appear prominently in the tables regardless of their attributes. All products will list the LVR with the product and rate which are clearly published on the product provider’s website. Monthly repayments, once the base criteria are altered by the user, will be based on the selected products’ advertised rates and determined by the loan amount, repayment type, loan term and LVR as input by the user/you. *The Comparison rate is based on a $150,000 loan over 25 years. Warning: this comparison rate is true only for this example and may not include all fees and charges. Different terms, fees or other loan amounts might result in a different comparison rate. Rates correct as of December 27, 2024. View disclaimer.

                                  Important Information and Comparison Rate Warning