Half fixed and half variable may not suit your home loan

Aug 25

2 min read

BV Finance graphic asking whether half fixed and half variable suits a borrower's cash flow

A 50/50 split home loan means half the loan has a fixed interest rate and half has a variable interest rate. It does not mean the loan is automatically safer or better suited to your household. The mix changes how much of the debt responds immediately to rate movements and how much may retain features such as an offset account or extra repayments.

Moneysmart is an Australian Federal Government website provided by the Australian Securities and Investments Commission (ASIC), Australia's financial regulator. Its Choosing a home loan guide, updated 29 July 2026, explains that a split loan can combine fixed and variable rates and that the ratio can be 50/50, 20/80 or another mix.

What each half changes

Fixed portion — the rate stays fixed for the agreed period, which can make repayments easier to budget. Extra repayments may be limited and break costs may apply if the loan is changed or repaid early.

Variable portion — the rate can move. This portion may retain an offset account, redraw and extra-payment flexibility, depending on the product terms.

Illustrative example

Australian borrowers reviewing a home loan divided equally between fixed and variable rates

Assume a $600,000 home loan is divided into $300,000 fixed and $300,000 variable. If the variable rate rises by 0.50 percentage points, the simplified first-year interest increase on that portion is about $1,500. If $50,000 is held all year in an offset account correctly linked to the variable portion, the simplified increase is about $1,250. Actual results depend on daily balances, repayments, fees and loan terms.

Four checks before choosing the mix

Four checks before choosing a fixed and variable home-loan mix

Repayment buffer — how much higher monthly repayment could your household absorb if variable rates rise?

Likely offset balance — how much cash do you realistically expect to keep in the linked account?

Extra repayments — will you want to repay more during the fixed period, and what limits apply?

Fixed term and exit costs — how long will the rate be locked, what rate applies afterward and could break costs apply?

What to do next

Write down the repayment change you could comfortably handle, your realistic offset balance and your extra-repayment plans. Then compare different fixed and variable proportions instead of accepting 50/50 as a default.

Sources

Moneysmart — About us

Moneysmart — Choosing a home loan

General information only. This is not financial advice. Loan options and eligibility depend on your personal income, liabilities, assets and lender assessment criteria.