Is an $800k Mortgage in Melbourne Actually Doable, or Am I Being Too Aggressive?

For a household earning $200,000 a year, an $800,000 mortgage equals four times gross annual income before accounting for any other debts. That is below the point at which APRA currently classifies new mortgage lending as high debt-to-income lending: from February 2026, banks are limited in how much new lending they can write at a debt-to-income ratio of six times income or more. (APRA)

That does not automatically make an $800k home loan affordable. APRA’s DTI calculation includes the credit limits of other debts, such as personal loans, credit cards, HELP debt and buy now pay later debt, so the mortgage cannot always be assessed in isolation. (APRA)

Using the current 6.17 per cent average rate for new principal-and-interest owner-occupier home loans shown by Moneysmart, an $800,000 loan over 30 years works out at roughly $4,884 a month, or $1,127 a week. (Moneysmart)

The useful question therefore is not simply, “Will the bank lend me $800,000?” It is whether those repayments still leave enough room for rates, insurance, maintenance, bills, savings and the lifestyle you actually want.

How Much Are the Repayments on an $800k Mortgage?

At an interest rate of 6.17 per cent, a 30-year principal-and-interest mortgage of $800,000 requires repayments of approximately:

$4,884 per month

$2,254 per fortnight

$1,127 per week

The 6.17 per cent assumption is not a guessed future rate. Moneysmart’s mortgage calculator currently identifies 6.17 per cent as the average interest rate for new home loans in July 2026, based on Reserve Bank of Australia data. (Moneysmart)

Your actual interest rate could be higher or lower depending on the lender, deposit size, loan-to-value ratio, whether the loan is fixed or variable and the features attached to it.

Even a small rate difference matters on an $800k mortgage. Moneysmart recommends comparing lenders carefully because a difference of only 0.5 percentage points can add up to thousands of dollars over the life of a home loan. (Moneysmart)

Is an $800k Mortgage Too High on a $200k Household Income?

One useful starting point is the debt-to-income ratio, or DTI.

APRA defines DTI as the total credit limits of a borrower’s debts divided by their verified gross annual income. From February 2026, APRA-regulated lenders have been required to limit the proportion of new owner-occupier and investor mortgages written at a DTI of six times income or greater. (APRA)

If an $800,000 mortgage were your only debt and household gross income were $200,000:

$800,000 ÷ $200,000 = 4.0 times income.

That is below APRA’s six-times high-DTI threshold.

But it is important not to interpret that threshold as an affordability rule saying anything below six times income is automatically safe. APRA’s restriction is a system-wide lending control applied to banks, not a personal recommendation for individual borrowers.

Your actual DTI can also be higher than the simple mortgage-to-income calculation. APRA says lenders include known debts such as:

other mortgages

personal loans

credit card limits

consumer finance

margin lending

buy now pay later debt

HELP or HECS debt.

(APRA)

So a household with an $800,000 mortgage plus other debts may have a materially different borrowing profile from one carrying only the home loan.

What Does the APRA 3% Serviceability Buffer Actually Mean?

Banks do not assess a new mortgage only at the interest rate you expect to pay on settlement.

APRA currently requires lenders to apply a minimum serviceability buffer of three percentage points above the loan product rate when assessing new residential borrowers. APRA reconfirmed that setting in May 2026. (APRA)

For example, if your actual mortgage rate were 6.17 per cent, the bank would generally assess your ability to service the loan using at least a 9.17 per cent assessment rate, subject to the lender’s own policies.

That is deliberately conservative. The buffer is intended to provide resilience against shocks such as higher rates, reduced income or increased household expenses. (APRA)

Does Bank Approval Mean You Can Definitely Afford It?

No.

Loan approval means the lender has assessed you under its serviceability rules and is prepared to lend the money. It does not mean the repayment will necessarily feel comfortable within your household budget.

A lender’s calculation and your personal definition of affordability can be very different.

You may want to keep money available for travel, childcare, school fees, career breaks, renovations, investing or simply having a substantial savings buffer. Those choices are not captured neatly by a headline DTI ratio.

Moneysmart recommends working through income, existing financial commitments and the ongoing costs of owning a home rather than relying solely on maximum borrowing capacity. It also suggests calculating how your budget would look if interest rates were two percentage points higher. (Moneysmart)

What Happens if Melbourne Mortgage Rates Rise Again?

Interest-rate risk is particularly relevant in 2026.

On 11 August 2026, the Reserve Bank of Australia held the cash rate at 4.35 per cent after increasing it three times, or 75 basis points, earlier in the year. (Reserve Bank of Australia)

The RBA says inflation remains too high and that it remains focused on returning inflation to target. However, its August financial-markets analysis also noted that market expectations for further cash-rate rises had receded. (Reserve Bank of Australia)

It is therefore better not to build an $800k mortgage plan around a confident prediction that rates either must rise or must fall.

Instead, model several scenarios.

Ask whether the mortgage is still comfortable if your rate rises by another one or two percentage points, one income temporarily drops, or you receive an unexpected major expense.

That gives you a much more useful answer than trying to predict the next RBA meeting.

Rent vs Buy: Why the Jump Can Feel So Extreme

The move from renting to owning can produce a confronting cash-flow difference.

Suppose you are currently paying $460 a week in rent. Moving to an $800,000 mortgage at approximately $1,127 a week would increase the basic housing payment by roughly $667 a week, before accounting for other costs of home ownership.

That is nearly $35,000 more a year in immediate cash flow.

The comparison is not perfectly like-for-like, because a principal-and-interest mortgage gradually pays down debt while rent does not create home equity.

But that does not mean the entire mortgage repayment should be treated as an investment. During the early years of a 30-year loan, a substantial proportion of each payment goes towards interest.

Homeowners also take on costs renters may not pay directly, including:

council rates

building insurance

repairs and maintenance

owners corporation fees where applicable

potentially higher utility and property upkeep costs.

Moneysmart specifically advises buyers to budget for these ongoing ownership expenses rather than considering the mortgage repayment alone. (Moneysmart)

A Better Way to Decide Whether an $800k Home Loan Is Affordable

1. Start With Your Actual After-Tax Cash Flow

DTI uses gross income, but mortgage repayments come from after-tax income.

Build a household budget using what actually arrives in your bank accounts each month, then deduct existing commitments and realistic living expenses.

Include annual and irregular bills rather than focusing only on weekly spending. Moneysmart’s budgeting guidance recommends accounting for essentials, debt repayments and unexpected costs when assessing household cash flow. (Moneysmart)

2. Stress-Test the Mortgage Yourself

Do not stop at the advertised repayment.

Run the $800,000 mortgage at your expected rate, then test it again at rates one and two percentage points higher.

If the higher repayment requires you to abandon savings completely or depend on credit cards for ordinary expenses, the loan may be too aggressive even if a lender will approve it.

3. Keep an Emergency Buffer

Home ownership becomes much less stressful when every unexpected bill does not threaten the mortgage.

Moneysmart suggests building an emergency fund of around three months of expenses as a useful target. An offset account can potentially serve this purpose while also reducing the interest charged on your mortgage. (Moneysmart)

4. Include the Cost of the Property After Settlement

The cheapest property to buy is not necessarily the cheapest property to own.

Before stretching your borrowing capacity, consider likely spending on repairs, heating and cooling, roofing, plumbing, bathrooms, landscaping and accessibility.

For buyers planning for ageing in place, disability access or changing mobility needs, it can be useful to assess potential home accessibility modifications before committing every available dollar to the purchase price. Changes such as ramps, accessible bathrooms, widened doorways or safer entrances can materially affect the true cost of a home.

5. Compare Borrowing Capacity With Your Own Comfort Limit

A mortgage broker can help establish how lenders assess your income, expenses and liabilities. Moneysmart notes that brokers can help borrowers understand what they can afford, compare suitable options and explain loan costs and features. (Moneysmart)

But there is no requirement to borrow the maximum amount offered.

A bank might approve $800,000 while you decide that $700,000 or $750,000 gives you a better quality of life. That difference is not a failure to maximise borrowing capacity. It is simply a different risk preference.

Does an $800k Budget Still Buy in Melbourne?

An $800,000 loan does not necessarily mean an $800,000 property budget.

Your maximum purchase price will depend on your deposit and buying costs, including Victorian land transfer duty where applicable.

For example, a buyer with an $800,000 loan and a substantial deposit may be shopping around the $1 million mark, while another household with a smaller deposit may need to keep the purchase price much closer to the loan amount.

Rather than choosing Melbourne suburbs first and then stretching the mortgage to fit, work backwards:

decide what repayment remains comfortable under a higher-rate scenario;

calculate the corresponding loan size;

add the deposit you can safely commit after buying costs and cash reserves; and

search Melbourne properties within that total budget.

That approach generally produces a more sustainable property search than starting with a dream suburb and asking a lender for the maximum amount needed to make it work.

So, Is an $800k Mortgage in Melbourne Actually Doable?

For a $200,000 household income with limited other debt, an $800k mortgage is not automatically extreme on a DTI basis. A simple four-times-income ratio is below APRA’s current high-DTI threshold of six times. (APRA)

At the current 6.17 per cent average rate used by Moneysmart for new principal-and-interest home loans, however, the repayment is still about $4,884 a month. That is a substantial permanent household expense. (Moneysmart)

The deciding question is therefore not whether $800,000 looks reasonable compared with Melbourne house prices or whether a bank will approve it.

It is whether you could pay roughly $4,900 a month, cover the full cost of owning the property, continue saving and still cope if rates or household expenses moved against you.

If the answer remains yes under those scenarios, an $800k mortgage may be manageable. If making the numbers work depends on today's rate, both incomes remaining uninterrupted and almost nothing unexpected happening, reducing the purchase budget is the stronger financial position.

Forge Real Estate Melbourne can help you blueprint your future by finding the perfect blue-chip property where your lifestyle needs and investment goals converge.

📞 Phone: (03) 91003633

✉️ Email: info@forgeproperty.com.au

🌐 Website: www.forgerealestate.com.au

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