Compare putting extra money into your mortgage with putting the same take-home cost into super, month by month, to age 67.
Should you put your extra money into super or pay off the mortgage faster? This calculator compares both options across your full working life, including employer SG contributions, salary sacrifice tax concessions, loan amortisation, and ATO minimum pension payments from age 67.
| Financial Year | Age | Opening | Interest | Min pmt | Loan extra | Principal | Closing |
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Not financial advice. Returns are compounded monthly from the annual rate, so 8% a year grows a balance by 8% over twelve months. The concessional cap is $30,000 to 30 Jun 2026 and $32,500 from 1 Jul 2026, and this model indexes it in line with salary growth. Pension payments are the ATO minimum for your age (Table 11, 2023-24 onwards). Consult a licensed financial adviser.
Paying extra off your home loan saves interest at your loan rate, and that saving is certain. Putting the same money into super can attract a tax advantage, but investment returns are not guaranteed and super is generally locked away until you reach your preservation age and retire. Which one comes out ahead depends on your loan rate, your tax rate, the returns you assume and how long you have.
This calculator runs both paths side by side to age 67. Each path uses the same take-home cost, and once a loan is cleared the repayments it frees up are redirected into super. You can edit any month to model a bonus or a break, and every table shows the working.
There is no single answer. Within the concessional cap, each $1 of take-home pay becomes more than $1 in super because contributions are generally taxed at 15% rather than your marginal rate. Against that, mortgage interest saved is certain, while super returns are not, and super cannot be accessed until you meet a condition of release. Change the return and the loan rate in the calculator to see where the result flips.
It is the limit on pre-tax contributions to super each year, and it includes your employer's super guarantee. The cap is $30,000 for 2025-26 and $32,500 from 1 July 2026 (ATO). Amounts above the cap are generally taxed at your marginal rate, and this calculator treats them that way.
Net position is your super balance minus the loan you still owe at the same point in time. It lets you compare a path that builds super with a path that reduces debt on one measure.
Division 293 tax, carry-forward of unused concessional cap, tax on pension payments, the Age Pension, fees beyond the net return, and changes to your marginal tax rate over time. It is general information, not financial advice, so speak to a licensed adviser before you act.
Project your super and your partner's month by month, with early retirement and ATO minimum pension.
See how your equity could build as the loan is paid down and the value changes.
Stamp duty for every state and territory, with first home buyer concessions and every step shown.
General information only, not financial advice. Check important figures with the relevant authority or a licensed adviser before you act.