A variable rate can fluctuate over the life of a loan as determined by your lender. While the rate is broadly reflective of market conditions, including the Reserve Bank’s cash rate, it is by no means the sole determining factor in your bank’s decision-making process.
A fixed rate is one which is set for a period of time, regardless of market fluctuations. Fixed rates can be as short as one year or as long as 15 years however after this time it will revert to a variable rate, unless you negotiate with your bank to enter into another fixed term agreement
Variable rates is that they are typically more flexible than their fixed rate counterparts which means that a lot of these products will let you make extra repayments and offer features such as offset accounts however fixed rates do offer customers a level of security by knowing exactly how much they need to set aside each month.