Investment · super vs loan

Super, repayment, or offset

Why this matters. Spare cash can sit in extra super, in a larger home-loan repayment, or in an offset account. The three columns use the same dollar and different rules. There is no column that is the right one.

The same spare cash in three places, shown side by side: super, an extra repayment on the home loan, and an offset. None of them is the right answer.

What you type

This comes off the wage before tax
The loan interest is tax-deductible (investment loan, not the home you live in)
Private hospital cover — skips the Medicare surcharge
Include HELP on the salary
5 years to 25 years
0 % to 12 %
0 % to 2 %
3 % to 10 %
0 % to 47 %

Room left in this year’s super cap, after 12% employer super: $10,900. Starting guess is a 7% return and a 0.8% fee. Change either. Earnings inside super are taxed at 15% here. Only $10,900 fits in the cap, so the three columns use that amount.

After 10 years

Super (locked)

$15,484FY2026–27

Starts as $9,265

Extra repayment

$10,425Example rate you typed

Same interest as the offset · starts $6,649

Offset (liquid)

$10,425Example rate you typed

You can take this back out · starts $6,649

A home loan you live in is paid with money you’ve already paid tax on. At a 39% tax rate, a taxable investment has to earn about 7.5% before tax to match saving 4.6% on that loan. That is a comparison, not a rule. The offset and the extra repayment save the same interest. The difference is you can take the offset back out. Putting it into super saves $4,251 of tax on the wage.

If you were born on or after 1 July 1964, the earliest you can take super is 60, and only if a release condition is met. The super figure here is still in the fund. It is not cash you can spend.

Next: Where the next dollar goes — How the limits stack. This page is only the spare dollar.

What doctors often miss

An offset balance reduces interest on the rate you type. It does not change the concessional cap, which is $32,500 for 2026–27.

ATO super rates ↗

Included / Not included

Included

  • The loan rate and offset balance you type, against the same loan with no offset · Example assumption, editable

Not included

  • A rate that changes over the years
  • Package fees and the tax treatment of an offset
  • Inflation
  • Redraw that is not the offset balance you typed
  • Insurance, stamp duty and brokerage

Assumptions you can edit are the inputs on this page. This is a model, not a prediction, a tax assessment, or a recommendation.

A rough figure — not advice. Terms

Also

Advertisement — labelled, never inside the number.

Sources used

Direct document for each published figure on this page. A number you type, with no row here, is an example assumption, editable. It is not a published rate.

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