Written by
Steven LeeMortgage Director, ODIN Mortgage & Tax
10+ years in Australian banking and mortgage lending
Should You Pay Off Your Mortgage Early Or Invest? Here’s The Math On What’s Best
4-MINUTE READ
Paying off mortgage quickly can help save you thousands of dollars in interest. But before you start chucking money in that direction, you’ll need to consider a few things before deciding whether it’s a smart idea.
We’ll crunch some numbers and discuss whether it makes sense to use your extra cash to pay off mortgage early or invest instead.
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How To Pay Off Your Mortgage (in 10 Years or Less)
Is this realistic, and is it possible, given the standard mortgage term is 30 years?
Sure it is.
First, let’s come up with your typical Australian family: two adults and a kid.
You have a $500,000 mortgage on your home with an interest rate of 3% on a 30-year loan term.
You earn $100,000
Your spouse earns $60,000
Together, you pay a combined tax of $36,784 and are left with $123,216 in disposable income, which is $10,268 per month.
Based on your level of income, we can expect total family expenses to be around $5000 per month, not including the mortgage repayments. (We got our numbers from the Australian Bureau of Statistics on Household income and expenditure.)
From our mortgage calculator, you’ll be able to work out the monthly repayment to be $2,108.
Now, let’s crunch the numbers.
| Cash Flow | Amount |
|---|---|
| Net income after tax | $10,268 |
| Less: Monthly living expenses | ($5,000) |
| Less: Mortgage repayment | ($2,108) |
| Money leftover for 'extra' repayments | $3,160 |
Transfer the entire $3,160 into your mortgage Redraw or Offset account every month (as Extra repayments), and you’re on your way to paying off your mortgage in 9 years and 1 month, saving over $180,000 interest in the process!

There’s nothing crazy about this.
You could pay off your mortgage even quicker by sticking to a budget plan. Reducing your monthly expenses from $5,000 to $4,000 and increasing your extra repayments by an additional $1,000 will help pay off the loan in 7 and a half years.
Paying off your mortgage is something we recommend, especially if it’s your primary place of residence because you receive no tax deductions from the interest you pay on your owner-occupier mortgage.

Pay Off Mortgage Early vs Invest: Why Avoid Early Mortgage Payoff
“Pay off your loan quickly!” Or, “Don’t pay off your loan!” Which is it?
While it’s advisable to pay off your owner occupied home loan as fast as possible, the case isn’t quite as clear cut for Investment property loans.
With investment assets, the Australian Tax Office (ATO) will allow you to claim all related expenses as a tax deduction. This includes investment properties and mortgage interest expense.
So if you paid $15,000 in investment interest this year, you’ll be able to claim the full amount against any taxable income you may have, such as your Rental income, Capital gains or your salary if working in Australia.
Right, so how does all this look like with real numbers?
Below is the annual cash flow summary using the example above of a $500,000 mortgage at a 3% interest rate and rental income of $500/week.

You would be making a rental income of $25,480 p.a., and some may think that income tax would be payable. However, the ATO allows you to claim all related expenses as a tax deduction, thereby reducing your taxable income to $1,951 (before tax depreciation).

After accounting for all the tax incentives (depreciation and write-offs), you end up in a negatively geared position, i.e. you pay no tax and instead start accumulating ‘tax credits’.
Want your personalised cash flow and tax position analysis? Check out the ultimate investment property analysis tool.
The last point as to why you shouldn’t rush to pay off your investment mortgage is so you’ll have more cash in the piggy and the flexibility that comes with it.
If your investment interest rate is 3.5% and your Australian marginal income tax rate is at 32.5%, then we can calculate your effective rate of savings from you paying down your investment home loan.
By putting $10,000 into your investment mortgage, you may think you are saving 3.5% per year or $350 in interest, but on paper, you are only saving ((1 – 0.325) * 3.5%) = 2.36%, after you account for the loss of tax deduction.
So it’s a question of opportunity cost/trade-off.
If you believe you can make more than 2.36% (after-tax) with your money elsewhere, then you should reconsider paying down your investment mortgage.
One popular strategy is to still opt for Principal and Interest repayments (because P&I rates are about 0.20% lower than I/O rates) while using your Offset account as a place to hold your cash until a better investment opportunity arises.
An important note to make is that paying down the loan (investment or otherwise) carries almost no risk. Whereas if you intend to buy stocks with the expectation of 10-20% return, there’s most certainly risk involved. It’s a good idea to speak to your financial planner to discuss if it’s sensible before making any big decisions.
Summary: Pay Off Mortgage Early or Invest
Paying off your mortgage early can save you a great deal of money in the long run for relatively little risk. Even a small monthly contribution can allow you to own your property sooner.
However, investing instead of paying off mortgage may be a better option for you so further thought can be required.
Regardless, it’s prudent to have an emergency fund before you put your money toward your home loan. Also, pay down your high-interest debts first (e.g. credit cards, personal loans) before focusing on your mortgage.
Making extra payments, refinancing, or switching your repayment schedule are all strategies you can use to pay off your mortgage early if that is your goal.
Request a call from Australian mortgage specialists today!
Get a free Australian mortgage assessment today.
Frequently Asked Questions
Can you use your income tax to pay off your mortgage?
No, you cannot directly use your income tax to pay off your mortgage in Australia. Your income tax is collected by the Australian Taxation Office (ATO) and used to fund government services like healthcare, education, and infrastructure.
However, there are some things that may be confusing:
- Tax Refunds: If your tax calculations result in an overpayment to the ATO, you will receive a tax refund. This refund is your own money and can be used for any purpose you choose, including paying off your mortgage. However, it’s important to remember that a refund is essentially getting back money you overpaid, not an additional source of income.
- Misinformation: There are some scams and misleading marketing campaigns claiming there are schemes allowing you to redirect a portion of your income tax to your mortgage. These are false and should be avoided.
- Tax Incentives for Other Things: While not directly paying off your mortgage, there are some tax incentives for homeowners in Australia, such as the first home buyer grant and negative gearing.
It’s important to rely on trusted sources like the ATO for accurate information about taxes and mortgage repayments.
Is it better to pay off mortgage or invest in Australia?
Whether it is better to pay off mortgage or invest in Australia depends on your personal financial goals and circumstances:
- Paying off your mortgage can provide you with the security of owning your home outright and reducing your debt. It can also save you on interest payments in the long run.
- Investing in Australia can potentially generate additional income and build wealth over time. It’s important to consider factors such as your risk tolerance, investment opportunities, and the potential returns on your investments.
To make an informed decision, speak with one of our mortgage brokers, who can provide personalised advice based on your specific situation. They can help you weigh the pros and cons and determine the best course of action.
Explain how to pay off your home loan in 5 years
Paying off your home loan in just 5 years is quite an ambitious goal! It’ll require some careful planning and financial discipline. Here are a few steps that might help you on your journey.
- Increase Your Repayments: Consider paying more than the minimum required each month. By increasing your repayments, you’ll be able to chip away at your loan balance faster.
- Make Extra Repayments: Whenever you have some extra cash, like a bonus or tax refund, put it towards your home loan. This can help reduce the principal amount and save you on interest in the long run.
- Cut Back on Expenses: Take a close look at your budget and see where you can make some cuts. By reducing unnecessary expenses, you’ll have more money to put towards your home loan.
- Consider Refinancing: If you’re eligible for a lower interest rate, refinancing your loan can help you save on interest and potentially shorten your loan term.
- Seek Professional Advice: It’s always a good idea to consult with a mortgage adviser who can provide personalised guidance based on your financial situation. They can help you create a tailored plan to pay off your loan in 5 years.
Paying off your home loan in such a short time frame requires dedication and careful financial management. It’s important to assess your own circumstances and determine if this goal is realistic for you.
What are some ways on how to pay off home loan faster/quicker?
Here are some effective ways on how to pay off home loan faster/quicker in Australia.
- Increase Your Repayment Frequency: Instead of monthly payments, switch to fortnightly or bi-weekly payments (half repayments every two weeks). This essentially adds an extra month’s worth of repayments per year, significantly reducing your loan term.
- Optimise Your Loan Structure: Make lump sum prepayments whenever you have extra cash, refinance your mortgage if interest rates have dropped, and make sure to opt for a shorter loan term initially, even if the monthly payments are higher.
- Reduce Your Interest Rate: Shop around for a better deal and apply only after improving your credit score to qualify for reduced interest rates.
- Manage Your Budget Efficiently: Cut unnecessary expenses, look for ways to boost your income, and avoid financial pitfalls such as high borrowing on credit cards and high-interest loans.
Below are some additional strategies that you can consider to pay off home loan faster/quicker.
- Offset Account: Link an offset account to your mortgage. Any money deposited in the offset account reduces the interest-bearing portion of your loan, effectively accelerating your repayment.
- Round up Your Repayments: Round up your monthly payments to the nearest $10 or $50. These seemingly small amounts can add up significantly over time.
- Use Windfalls Wisely: Unexpected income like tax refunds or inheritance can be used to make large lump sum prepayments, significantly decreasing your loan balance.
Remember, choosing the best strategy depends on your individual financial situation, risk tolerance, and goals. Our team can help you with all this.
What are the financial benefits of paying off mortgage early?
Here are some of the financial benefits of paying off mortgage early:
Interest Savings: The most significant benefit is the reduction in the total amount of interest paid over the life of the loan. Since interest is calculated on the remaining principal, paying off the principal early reduces the overall interest.
More Cash Flow: Once your mortgage is paid off, you free up a significant portion of your monthly income, which can be used for other investments, savings, or personal expenses.
Reduced Financial Stress: Eliminating mortgage payments can reduce financial stress and provide peace of mind, knowing that your home is fully paid for.
Increased Equity: Paying off your mortgage early increases your home equity, which can be a valuable asset for future financial planning or borrowing needs.
Improved Credit Score: Successfully paying off a mortgage can positively impact your credit score, making it easier to obtain favourable terms on future loans or credit.
Flexibility in Retirement: Without mortgage payments, you have more financial flexibility in retirement, allowing you to allocate your resources to other needs and desires.
Investment Opportunities: The money saved on interest payments can be redirected into other investments, potentially earning a higher return than the interest rate on your mortgage.
Protection Against Market Fluctuations: Paying off your mortgage early can provide a hedge against potential declines in the real estate market, ensuring that you own your home outright regardless of market conditions.
By considering these benefits, you can evaluate whether paying off your mortgage early aligns with your overall financial goals and circumstances.
What are the pros and cons of paying off mortgage early?
Paying off your mortgage early can offer numerous benefits, but it also comes with some potential drawbacks. Here are the pros and cons to consider.
Pros
- Interest Savings: You save money on interest over the life of the loan by reducing the principal faster.
More Cash Flow: Without monthly mortgage payments, you have more disposable income for other investments, savings, or personal use.
Reduced Financial Stress: Owning your home outright can provide peace of mind and reduce financial anxiety.
Increased Equity: Paying off the mortgage increases your home equity, which can be a valuable financial asset.
Improved Credit Score: Successfully paying off a major loan can positively impact your credit score.
Flexibility in Retirement: Eliminating mortgage payments provides greater financial flexibility in retirement.
Investment Opportunities: The money saved on interest payments can be redirected into other investments with potentially higher returns.
Protection Against Market Fluctuations: Owning your home outright protects you from declines in the real estate market, ensuring you have a secure asset.
Cons
Opportunity Cost: The money used to pay off the mortgage early could potentially earn a higher return if invested elsewhere.
Liquidity Issues: Once you pay off your mortgage, those funds are tied up in your home and are not easily accessible without refinancing or selling.
Potential Tax Implications: Mortgage interest is tax-deductible in some regions, so paying off your mortgage early may result in losing these deductions.
Prepayment Penalties: Some mortgages have prepayment penalties for paying off the loan early, which could offset the financial benefits.
Reduced Emergency Fund: Using a significant amount of money to pay off your mortgage might reduce your available cash for emergencies or other needs.
Inflation Considerations: With low-interest rates, the impact of inflation on your mortgage payments is minimal, making other investments potentially more lucrative.
Evaluating these pros and cons can help you decide whether paying off your mortgage early aligns with your financial goals and overall strategy.
Mortgage payoff strategy vs investment strategy: Which is better?
Choosing between a mortgage payoff strategy and an investment strategy depends on your individual financial situation, goals, risk tolerance, and the current economic environment.
Ultimately, the best choice depends on your personal circumstances and financial goals. Some people opt for a balanced approach, paying down their mortgage while also investing. This strategy can provide the benefits of both worlds and mitigate some of the risks associated with focusing solely on one approach.

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