How mortgages work and what you need to qualify

Buying a home in Australia usually starts with a home loan, also called a mortgage. The borrower agrees to repay a lender the amount borrowed, interest and certain fees, with the property acting as security. If repayments are missed, the lender may ultimately take possession and sell the property to recover the debt.

Qualification depends on the lender’s lending criteria, your finances and the property. There is no single government-approved list that guarantees approval. A regular salary and a 20 per cent deposit make the process simpler for many buyers, but lenders can approve applications with smaller deposits or less conventional employment.

Before approving a residential loan, a lender assesses whether ongoing income can cover repayments and essential living costs, usually with a stress test. It also considers debts, credit history, employment stability, the property’s value and the size of the deposit. Different lenders may reach different decisions from the same information.

Australians often compare loans through a bank, credit union or mortgage broker, with many applications and document uploads completed online. That convenience does not remove the need for accurate records. Keep payslips, tax returns, bank statements, identification and genuine savings current so the application reflects your real financial position.

How a mortgage works in Australia

A mortgage is a secured consumer credit contract. Most Australian home loans are made under the National Consumer Credit Protection Act 2009 and the National Credit Code, which set conduct rules for advertising, fees, hardship assistance and credit assessments. Lenders must meet responsible lending obligations, but being eligible under the law does not create an automatic entitlement to a loan.

Most repayments have two parts: interest on the outstanding balance and principal. Interest generally accrues daily and is charged to the account monthly. Some loans allow interest-only periods, but the balance then does not fall unless extra principal is paid. Regular principal and interest repayments gradually reduce both the debt and the loan-to-value ratio.

Owner-occupier and investment loans are treated differently. An owner-occupier usually receives more favourable rates and higher loan-to-value options because the borrower lives in the property. An investor is expected to service the loan from other income. Investment property expenses may be tax deductible when the property produces assessable income, although lenders still apply their own income and stress-testing rules.

A comparison rate is useful when shopping, but it is not the whole picture. Look at the advertised variable rate, fixed-rate term, ongoing fees, repayment flexibility and features such as an offset account or redraw facility. A package fee may be worthwhile for frequent transactions or a large offset balance, while a basic loan may cost less for a borrower who needs little flexibility.

What lenders look for and documents they request

Lenders need evidence that income is likely to continue and that existing commitments are manageable. Permanent employees usually provide recent payslips and details from their employer. Casual workers and contractors may need a longer history of earnings, while self-employed applicants often need business tax returns, personal tax returns and, where relevant, BAS statements.

Serviceability is calculated by considering income against mortgage repayments, existing debts and basic household living costs. A lender may discount overtime, commission, casual wages or temporary bonuses, and it may treat rental income cautiously by allowing for vacancy and landlord expenses. A borrower with strong earnings can still be declined if the loan is large relative to that income.

Common income and employment evidence includes:

• Recent payslips and current employment details.
• Tax returns and BAS statements, with two years often requested for self-employed applicants.
• Bank statements showing salary deposits, business receipts or savings.
• Centrelink, pension, rental or investment-income evidence where the lender accepts it.

Common evidence of expenses and financial position includes:

• A credit report and details of current and closed credit accounts.
• Recent bills or bank statements showing utilities, food and regular commitments.
• Statements for car loans, personal loans and existing home loans.
• Evidence of the deposit, documented savings and identity documents.

A lender may also request a tenancy agreement, landlord statements or an existing mortgage account for rental property. Requirements vary across lenders, especially for unusual income, trust structures or self-employment. A pre-approval can indicate an amount you may borrow, but final approval can still depend on the property and updated documents.

Deposits, equity and the 80 per cent LVR rule

A deposit reduces the amount borrowed and demonstrates some savings. Many lenders offer products for owner occupiers with deposits below 20 per cent, often from 5 per cent, but may charge for low deposit or mortgage insurance and impose stricter limits. A larger deposit can reduce this risk, lower the loan amount and reduce the repayments.

The loan-to-value ratio compares the secured loan with the property’s value. For owner-occupied homes, a national cap generally limits new high-LVR lending to 80 per cent, meaning a deposit of at least 20 per cent of the lender’s assessed value. The cap does not apply in the same way to investor loans, which have separate product limits and serviceability tests.

Initial LVR is commonly based on the lower of the purchase price and the lender’s valuation, so an unexpectedly low valuation can affect borrowing. Equity is the difference between the property’s market value and the balance still owed. The federal First Home Guarantee scheme may help eligible buyers use a smaller deposit, but scheme conditions and property caps change, and lender approval remains necessary.

Negative equity arises if the property’s market value falls below the outstanding loan balance. It can limit further borrowing and may cause a lender to seek additional security. Negative equity does not automatically mean the borrower has defaulted if mortgage repayments continue to be made on time.

Credit history, debts and financial resilience

Most lenders review a credit report supplied by Equifax, illion or Experian. A missed payment, default or serious financial hardship entry can affect borrowing capacity, although a low credit score is not the only decision. Some lenders use scoring more heavily than others and consider the pattern, explanation and age of any adverse information.

Other debts matter because they compete with the home loan for income. Credit card limits, car finance, personal loans and existing mortgage commitments must be disclosed even if they are not currently overdue. Keeping card balances close to their limits can make a household look less resilient, so paying down revolving balances before applying may help.

The lender usually tests the loan at a higher rate than the rate being offered, often its current variable rate plus a lender-specific buffer. It may also require evidence of emergency savings, adequate home and income insurance, and enough cash for moving, furniture and other household needs. A buffer for buyers in Sydney or Melbourne may be especially important because insurance, local charges and transport costs can be substantial.

Compare costs and prepare for approval

Compare more than the interest rate. Check establishment and account-keeping fees, valuation and discharge costs, the terms of any fixed-rate period, and charges for late payment or early repayment. Early repayment penalties are uncommon on many owner-occupier variable loans, but fixed and split loans can have break costs. Read the terms with those costs in mind.

Buying costs sit on top of the deposit and are not normally included in the loan-to-value calculation. These include stamp duty or transfer duty, legal and building or pest inspection fees, and registration charges. Stamp duty is charged in New South Wales; Victoria calls its duties transfer duty and land tax; Western Australia charges land tax; other states use duty arrangements. Grants and concessions vary, so check the current rules for your state.

Property choice affects both the deposit and the loan. Sydney and Melbourne have some of the country’s highest entry prices, often making apartments or townhouses more accessible than detached houses. Brisbane, Perth, Adelaide, Canberra and regional centres can offer different price points, property types and rental yields, but each area has its own supply, vacancy and insurance profile. Expected appreciation should not replace a repayment level you can comfortably afford.

Build a budget using your actual recurring income and commitments, then compare products from at least two lenders. A licensed mortgage broker can assess several options, while a lender can explain its own criteria directly. Rates can change between assessment and settlement, and pre-approval is conditional and time-limited. Request a formal assessment or pre-approval, organise your documents, and set a firm purchase budget before you start bidding.