Should You Pay Down the Mortgage or Invest? A Wealth Management Guide for Melbourne Households

By Melina Pisani, Financial Advisor, BCom (FinPlan)

You've worked hard to get ahead. Maybe you've just been promoted, received a bonus, or finally have a little extra left over at the end of each month. Whatever's brought you to this point, what comes next is a surprisingly challenging question: should you put that money towards your mortgage, or invest it for the future?

For many Melbourne households, that decision sits alongside other priorities. You might be supporting children, planning a renovation, or wondering whether you could afford to take a career break. Perhaps you'd like the freedom to work a little less in the years ahead. Paying off the mortgage can bring that freedom closer, but so can building savings and investments beyond your home.

You don't need to be approaching retirement to start thinking about this. The decisions you make during your working years help shape the choices you'll have later. And if retirement is getting closer and you still have a mortgage, there's an extra question: how will you balance clearing the debt with having enough money to live comfortably?

There isn't one answer that suits everyone. This guide explains how to compare mortgage repayments, offset accounts, investing and superannuation, and what changes when retirement becomes part of the picture.

Quick Navigation

• Is It Better to Pay Off Your Mortgage or Invest?
• Compare Interest Savings With Returns After Tax and Fees
• When Paying Down the Mortgage May Take Priority
• Could an Offset Account Give You More Flexibility?
• When Investing Alongside Your Mortgage May Make Sense
• Mortgage or Super: How Do You Choose?
• Could a Combined Approach Work Better?
• What About Borrowing to Invest or Debt Recycling?
• Your Mortgage and Investment Decision Checklist
• Frequently Asked Questions

Is It Better to Pay Off Your Mortgage or Invest?

Paying down your mortgage reduces what you owe and the interest charged on it. Investing gives your money the opportunity to earn income and grow, but there's no certainty about what you'll earn. Your investments can also fall in value.

It's tempting to compare two numbers, your mortgage rate and a possible investment return, and choose whichever looks better. Those numbers matter, but they don't tell you everything. You'll also need to consider tax, fees, risk and when you might need the money back.

For example, savings for a renovation next year need to be available when the builder's invoice arrives. Money you're putting aside for life after work may have many years to grow. The same approach won't necessarily suit both.

There are four main options worth understanding:

This is where wealth management advice and debt management advice belong in the same conversation. You want to make progress on your loan without losing sight of the other things you're working towards.

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Compare Interest Savings With Returns After Tax and Fees

An investment advertising a higher return than your mortgage rate can look like the obvious winner. Before you decide, look at what you'd actually keep.

For a loan used entirely to buy the home you live in, with no income-producing use, the interest generally isn't tax deductible. Saving that interest doesn't create taxable investment income. Investment earnings, on the other hand, may be taxable, and fees can eat into the return. If your loan has also been used for investment or business purposes, the comparison needs more care. The ATO's interest deduction guidance explains why the use of borrowed money matters.

A Simple Example

Suppose you've built up $50,000 in a fully linked, 100% mortgage offset account. Using a hypothetical home loan rate of 6% a year, that could save approximately $3,000 in interest over a year, before additional account or loan costs. That assumes the $50,000 stays in the account, the rate doesn't change and the loan balance remains higher than the offset balance.

For comparison, an investment paying fully taxable income would need to earn more than $3,000 before tax to leave you with the same amount.

This is a simplified illustration, not a current mortgage quote, investment forecast or recommendation. The assumed 30% tax rate is illustrative, with levies and other tax effects excluded. The calculation ignores fees, compounding and changes in balances or rates. Shares, property and other investments can involve capital gains, tax concessions and different timing, so the 8.57% figure isn't a universal investment hurdle.

That doesn't mean investing is the wrong choice. It means the headline return isn't enough to make the decision. Ask what you could keep after tax and costs, how uncertain that return is, and whether you're comfortable with the possibility of a loss.

When Paying Down the Mortgage May Take Priority

If your repayments already leave little room in the budget, an investment that might perform well isn't much comfort when the next payment is due. Reducing debt may deserve more attention if your income is uncertain or you expect to cut back on work.

There's a personal side to this, too. You might be quite comfortable investing while you have a mortgage. Or you might find yourself checking the loan balance every month and wishing it were gone. If less debt would make you feel more secure about changing jobs or taking parental leave, that's worth talking about. A strategy you can live with matters as well as the numbers.

Before making a large extra repayment, check:

• Whether the loan allows extra repayments without additional costs, particularly during a fixed-rate period.
• Whether you'll still have accessible savings for emergencies and planned expenses.
• Whether higher-interest debts need attention first.
• Whether your current interest rate and loan features remain competitive.

One detail is easy to miss: extra repayments may help you finish the loan sooner without reducing the monthly payment your lender requires. If you need more breathing room in your monthly budget, ask what would actually change before moving a large amount into the loan. Moneysmart's mortgage guidance explains why checking the loan's terms and costs is important.

Could an Offset Account Give You More Flexibility?

Perhaps you're saving for something specific, or you'd simply feel better knowing you could get to your money if you needed it. An offset account can be useful when you want to reduce mortgage interest without committing those savings to an investment or an extra repayment.

An offset is a separate account linked to your home loan. The eligible account balance reduces the amount of the loan on which interest is calculated. The savings remain in your account, so putting money there doesn't itself repay the loan principal.

That can give you flexibility while you're building an emergency reserve or saving for school fees, home repairs or a period on one income. If you withdraw the money, though, the interest-saving benefit reduces too.

An offset isn't automatically better value than a loan without one. Compare any account fees and higher loan costs with the interest you expect to save. Check whether it's a full or partial offset, and make sure the account is actually linked to the right loan, particularly after refinancing. Moneysmart's offset account guide covers these checks.

You may also have a redraw facility, but it isn't the same thing. Redraw lets you access eligible extra repayments under your lender's conditions, which can include restrictions. Redrawing money for a different purpose can also affect the tax treatment of interest. If you might rent out your home later, get tax advice before making substantial repayments or redrawing funds. How you move the money can matter later.

When Investing Alongside Your Mortgage May Make Sense

You don't necessarily have to wait until your mortgage is gone to start investing. If repayments are manageable, you have money left over consistently and you won't need the investment funds for some time, there may be room to do both.

For someone still building their career, waiting until the final mortgage payment could mean putting other goals on hold for years. Investing can help build assets beyond the family home, although whether that makes sense depends on your circumstances and the investments you choose. A valuable home doesn't, on its own, give you money to spend without selling, downsizing or borrowing against it.

Be honest about how you'd manage a difficult period. If markets fell just as your household income dropped, could you keep paying the mortgage without selling investments at a loss? Could you leave the money invested for longer if necessary, knowing that recovery isn't guaranteed?

Before investing, work out what the money is for, how long you can leave it alone, how easily you can access it and what fees you'll pay. Consider diversification too: spreading investments can reduce concentration risk, although it can't prevent every loss. Moneysmart's investing-plan guidance is a useful starting point.

Remember that money invested elsewhere isn't reducing your mortgage interest. Last year's strong investment returns don't tell you whether the same choice will work well from here.

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Mortgage or Super: How Do You Choose?

Super belongs in this conversation well before retirement is around the corner. If you've received a pay rise or bonus, you might be wondering whether to put some of it towards retirement savings rather than the home loan.

Additional super contributions may offer tax advantages, depending on your income and circumstances. There are eligibility rules and contribution caps to check first. If you're claiming a deduction for a personal contribution, you'll also need a valid notice of intent and acknowledgment from your fund. The ATO's personal super contribution guidance explains these requirements.

The trade-off is access. Money you've contributed to super generally can't be taken back out just because a household expense comes up. Deciding you'd like to retire doesn't automatically mean you've met the legal conditions to withdraw it, either. Check the ATO's super access rules before making plans that depend on a withdrawal.

Super isn't a single investment with one level of risk. It's a structure for holding retirement savings, and the potential returns and risks depend on how those savings are invested. A useful comparison therefore looks at the tax treatment, investment choices and access rules alongside the mortgage interest you could save.

If You're Approaching Retirement With a Mortgage

If you expect to have paid off your home before retirement, your focus may already be on building savings and future income. If you still have a mortgage, it's worth looking at how the remaining debt fits with your plans to stop or reduce work.

Being mortgage-free can be reassuring. But using most of your accessible savings to get there could leave you short elsewhere. Before making a large repayment, ask:

• If you clear the loan, how much remains for everyday spending and unexpected costs?
• If you keep the loan, where will repayments come from when employment income reduces?
• If you retire before you can access super, what savings will bridge that period?
• If investments fall near retirement, could you still cover living costs and repayments without having to sell?
• If you're eligible to withdraw a super lump sum and use it to clear the mortgage, how much would remain to fund retirement?

The aim is to understand both the debt you're removing and the savings you'd have left. A smaller mortgage and a larger super balance each tell you something, but neither figure answers the whole question on its own.

Our guide to pre-retirement planning in your 50s and 60s explores these decisions in more detail. If you're considering retirement planning advice in Melbourne, comparing a few realistic scenarios can help you see what each option would mean for your spending and lifestyle.

Could a Combined Approach Work Better?

It doesn't have to be an all-or-nothing decision.

A bonus, for example, might help top up an emergency buffer, reduce debt and get a longer-term investment plan started. If you've had a pay rise, you might decide how much of the ongoing increase you can comfortably commit each month. Neither approach requires you to put every spare dollar in the same place.

There's no standard split that works for every household. Someone preparing for parental leave may need more accessible savings than someone with stable income and no major spending planned. If work is uncertain, it may make sense to pause and review before taking on more investment risk.

It's also worth asking whether one goal has been pushed aside indefinitely. Are you waiting for the mortgage to disappear before thinking about investments at all? Or are you investing enthusiastically while a loan you want to clear barely changes? Either is a reason to look again at where your money is going.

Revisit the decision when your circumstances change. A new job, refinancing, a growing family or plans to reduce work can all change what you need from your money.

What About Borrowing to Invest or Debt Recycling?

You may have heard about debt recycling while researching mortgage and investment strategies. It's important to separate this from investing money you've already saved. Taking out or redrawing a loan to invest adds borrowing risk to investment risk.

Debt recycling generally involves progressively replacing private home-loan debt with borrowing used for income-producing investments. The debt hasn't disappeared. You still need to service the loan, including if the investment performs poorly.

Whether interest is deductible depends on what the borrowed money is used for and the applicable tax rules, not simply on the property securing the loan. Mixing private and investment borrowing can mean dividing interest costs between deductible and non-deductible amounts and keeping careful records. The ATO's investment interest guidance explains this distinction.

Borrowing can magnify losses. If your home secures the loan and you can't meet repayments, your home may be at risk. Moneysmart classifies borrowing to invest as a high-risk strategy.

This isn't a strategy to set up from a general article or a conversation with a friend. Seek financial, lending and tax advice about the structure, current rules and what a poor outcome would mean for your household. A tax deduction won't make up for an investment or loan you can't afford to hold.

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Your Mortgage and Investment Decision Checklist

You don't need to arrive at an advice appointment with all the answers. Having these details handy can make the conversation more useful:

1. Your loan details: balance, rate, fees, term, fixed-rate restrictions, offset and redraw arrangements.
2. Your household budget: what's genuinely left after regular bills and less frequent costs, such as insurance renewals and car repairs.
3. Your safety buffer: accessible money for unexpected expenses or an income interruption.
4. Your other debts: their costs and repayment obligations.
5. Your goals and timing: renovations, family costs, career changes, reduced work and retirement plans.
6. Your super and investments: balances, investment settings, contribution arrangements and access rules.
7. Your tax position: ownership, loan purposes and the treatment of any proposed investment or contribution.

A useful question to finish with is: would this still be manageable if an unexpected bill arrived or your income changed?