Savings .com.au

Interest-only mortgage repayment calculator

Savings.com.au’s interest-only home loan calculator can allow you to compare interest-only home loans with principal and interest loans, to see how much you could save in the short-term in exchange for greater long-term expenses.

All you need to do to use to our interest-only home loan calculator is:

  • Input your desired interest rate
  • Input the loan term (length) and the interest-only term
  • Input the loan amount and the repayment frequency

You can then compare this to a different home loan, and hopefully find the right loan for you.

What is an interest-only mortgage?

Interest-only (IO) 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 short period of time, you only have to repay the interest component of the home loan, before it reverts to both principal and interest (P&I) repayments.

Why switch to an interest-only home loan?

Interest-only home loans can be described as “less now, more later” in that your repayments for a few years will be significantly lower, but will be higher than usual once the interest-only period ends. They’re particularly attractive to investors, who can tax-deduct the interest repayments.

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

  • With a 5-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.

Read here to learn more about the pros and cons of interest-only home loans.

To work out how much your repayments will be with an interest-only home loan, use an interest-only loan calculator.


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

VariableMore details
Online ExclusiveUp To $4K Cashback
  • Immediate cashback upon settlement
  • $2,000 for loans up to $700,000
  • $4,000 for loans over $700,000
Online ExclusiveUp To $4K Cashback

loans.com.au – Variable Basic Cashback Home Loan (Principal and Interest) (LVR < 70%)

  • Immediate cashback upon settlement
  • $2,000 for loans up to $700,000
  • $4,000 for loans over $700,000
VariableMore details
Refinance OnlyApply 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.
Refinance OnlyApply In Minutes

Unloan – Variable Rate Home Loan – Refinance Only

  • 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.
VariableMore details
Unlimited Redraws
  • No annual fees - None!
  • Get fast pre-approval
  • Unlimited additional repayments free of charge
  • Redraw freely - Access your additional payments when you need them
  • Home loan specialists available today
Unlimited Redraws

ubank – Neat Variable Home Loan (Principal and Interest) (LVR < 60%)

  • No annual fees - None!
  • Get fast pre-approval
  • Unlimited additional repayments free of charge
  • Redraw freely - Access your additional payments when you need them
  • Home loan specialists available today
FixedMore details
  • $0 application Fee
  • Estimate your borrowing power in as little as one minute
  • Safeguard against possible interest rate rises and fix at a great rate now

Macquarie Bank – Basic Home Loan Fixed (Principal and Interest) (LVR < 70%) 3 Years

  • $0 application Fee
  • Estimate your borrowing power in as little as one minute
  • Safeguard against possible interest rate rises and fix at a great rate now
VariableMore details
4.6 Star Customer Ratings
4.6 Star Customer Ratings

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

    FixedMore details

    Macquarie Bank – Basic Home Loan Fixed (Principal and Interest) (LVR 70%-80%) 3 Years

      VariableMore details

      ubank – Neat Variable Home Loan (Principal and Interest) (LVR 70%-80%)

      • Home loan specialists available today
      VariableMore details
      • $0 application fee
      • Fast turnaround times
      • Estimate your borrowing power in as little as 1 minute

      Macquarie Bank – Offset Package Home Loan (Principal and Interest) (LVR 60%-70%)

      • $0 application fee
      • Fast turnaround times
      • Estimate your borrowing power in as little as 1 minute
      VariableMore details
      • Flexibility without the fees: Easily change your loan type, repayment frequency or top-up when you need, for free.
      • Unlock equity easily and get maximum borrowing power.
      • Set up your offsets (up to 10) to stash your cash to reduce the your interest payable
      • Drop your own rate: With AcceleRATES the more you pay down your loan, the more we'll lower your interest rate - automatically

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

      • Flexibility without the fees: Easily change your loan type, repayment frequency or top-up when you need, for free.
      • Unlock equity easily and get maximum borrowing power.
      • Set up your offsets (up to 10) to stash your cash to reduce the your interest payable
      • Drop your own rate: With AcceleRATES the more you pay down your loan, the more we'll lower your interest rate - automatically
      FixedMore details

      Westpac – Premier Package Fixed Options Home Loan (Principal and Interest) 1 Year (LVR < 70%)

        VariableMore details

        Commonwealth Bank – Wealth Package Variable Home Loan (Principal and Interest) (LVR 70% - 80%)

          VariableMore details

          NAB – Base Variable Home Loan (Principal and Interest) (New Customer)

            FixedMore details

            ANZ – Fixed Rate Home Loan (Principal and Interest) 5 Years (LVR < 80%)

              VariableMore details

              Heritage Bank – Discount Variable Home Loan ($150k+) (LVR < 70%)

                VariableMore details

                P&N Bank – & Basic Home Loan (LVR < 60%)

                  FixedMore details

                  Newcastle Permanent – Premium Plus Package Fixed Rate Home Loan Special (Principal and Interest) 2 Years

                    FixedMore details

                    Commonwealth Bank – Fixed Rate Home Loan (Principal and Interest) 3 Years

                      FixedMore details

                      HSBC – Package Fixed Rate Home Loan (Principal and Interest) 4 Years (LVR < 80%)

                        FixedMore details

                        IMB Bank – Fixed Rate Home Loan (Principal and Interest) 3 Years (LVR ≤ 80%)

                          FixedMore details

                          ING – Fixed Rate Home Loan 5 Years (LVR < 80%)

                            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 March 4, 2024. View disclaimer.