Savings Comparison Calculator Australia
Compare after-tax returns across HISA, mortgage offset, term deposits, and super. See which savings channel gives you the best return for your tax bracket.
Sets the marginal rates and the super concessional cap used below
The amount you have to save or invest
Added at the end of each month. Leave at 0 to compare a lump sum only.
High-interest savings account rate (interest is taxable)
Your home loan interest rate (offset saves this rate, tax-free)
Term deposit interest rate (interest is taxable)
Assumed annual return in super (default 7%)
Your marginal tax rate including Medicare Levy
How long you plan to hold the savings
$10,000.00 of the $32,500.00 concessional cap used, before any carry-forward.
How This Works — Each channel is compared on an after-tax basis. HISA and term deposit interest are taxed at your marginal rate. Offset savings are tax-free (interest not paid). Super contributions are taxed at 15% rather than your marginal rate, and super earnings are also taxed at 15% — but you cannot access the money until preservation age. Monthly deposits are added at the end of each month and earn from the following month. A term deposit is locked for its term, so it is compared on the starting balance alone. Concessional contributions above the cap are included in your assessable income and taxed at your marginal rate.
Need a live HISA input? Use the CDR savings account rate explorer to filter public rates and send one back to this calculator.
Tax Accuracy & Sources
Reviewed: March 2026 · Tax year: 2026-27
This calculator is an estimate tool and may not cover all personal circumstances. For state-based taxes, confirm details with your state or territory revenue office.
Why is offset often better than HISA?
How is super taxed?
Which savings channel is best for me?
Choosing super as your savings channel? Fees still matter within the fund — see the Super Fund Fee Comparison Calculator to compare two funds' admin, investment and insurance fees.