Glossary · Financial Portfolio

What is a variable interest rate?

A variable interest rate can change during the loan term. A rate change can affect the interest charged and the repayments required.

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Plain English. Australian context.

Variable interest rate

Know what the term means, what it does not mean and where to go next.

Meaning & context

What it means for your records.

Plain-English information to help you organise your financial picture.

Financial Portfolio editorial team
Australian record-keeping context
Updated 7 October 2026

A simple example

For a simple illustration, A$100,000 at 6% represents A$6,000 of annual interest if the balance stays unchanged. At 6.5%, it represents A$6,500. Actual loan calculations depend on daily balances, timing and terms.

What to keep in your records

Record the rate with its effective date rather than overwriting the history without context. Keep lender notices and statements together, and distinguish the current rate from any old introductory rate.

A common mix-up

A variable loan rate is not the same thing as the Reserve Bank cash rate. Use the rate stated by the lender for that particular loan. Read ASIC Moneysmart’s explanation.

Should I update a loan record after a rate change?

Yes. Update the rate and relevant repayment details from the lender’s notice, keeping the effective date. Updating a record does not change the loan agreement.

Where can I check the meaning of variable interest rate?

Use the ASIC Moneysmart source alongside the relevant statement or product documents. The examples here explain the term; they do not recommend a financial product.

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