A home loan is the largest financial commitment most Australians ever make, and the gap between a good one and a lazy one is measured in tens of thousands of dollars over its life. The single most expensive habit is loyalty: many lenders quietly keep long-held customers on rates well above what they offer new ones.
This guide is the map. Each section gives you the short version and links to a full breakdown with real Australian numbers, last checked June 2026. None of it is personal financial advice; it is the plain-English version, so you can ask better questions.
How much you can borrow
Your borrowing power comes down to income, expenses, existing debts, your deposit, and a serviceability buffer lenders add on top of the actual rate. A rough rule of thumb is five to six times gross household income, but debts and dependants move that a lot. The full method, and what shrinks it, is in how much can I borrow for a home loan.
The deposit, and LMI
A 20 per cent deposit avoids Lenders Mortgage Insurance, a one-off premium that protects the lender, not you, and can run past $10,000 to $30,000 on a small deposit. The ways around it matter: see LMI explained, the option of a guarantor home loan, and the schemes in our first home buyer guide.
Fixed or variable
Fixed gives you repayment certainty and break costs; variable gives you flexibility, an offset, and rate risk. Most Australians sit on variable, and many split the difference. The trade-offs in full: fixed vs variable home loan.
Offset and redraw
An offset account can be the highest-return, lowest-risk move a borrower makes, because every dollar in it saves you interest at your mortgage rate, tax-free. How it works, and how it differs from redraw: what is an offset account.
Refinancing
If your rate is drifting above what new customers are offered, refinancing can claw back real money, as long as the savings beat the switching costs. The when and how: how to refinance your home loan.
Check your home loan rate once a year. If it starts with a number the bank would not offer a new customer, you are paying the loyalty tax.
The upfront costs
The deposit is not the only cash you need. Stamp duty is usually the biggest extra, and it varies by state and price: see stamp duty in NSW. Budget also for conveyancing, inspections, and loan fees.
Other borrowing
A home loan rarely sits alone. If you are weighing a car, consider a novated lease against a normal loan. For other needs, read up on personal loans and, if debts are piling up, debt consolidation. Running a business? See startup business loans.
The bottom line
The borrowers who do best are not the ones who find a secret rate. They are the ones who know their numbers, avoid the loyalty tax, and check their loan once a year. Start by working out your real borrowing power and comparing what is actually on offer with a tool like the ones at Your Finance Guide, then read the section above that matches your next decision.