How it's calculated
- Super guarantee. Your employer must pay 12% of your qualifying earnings into your super fund. From 1 July 2026 ("payday super") the amount arises on each payday rather than each quarter. Qualifying earnings include your ordinary time earnings and any salary you sacrifice into super, so sacrificing doesn't reduce what your employer pays.Federal Register of Legislation
- Maximum contributions base. Super guarantee stops once your qualifying earnings from one employer reach $270,830 in the year: the concessional cap × 100 ÷ 12, rounded down to $10.
- Concessional cap. Employer contributions and salary sacrifice together count towards the $32,500 concessional contributions cap for 2026–27. The cap started at $25,000 in 2017–18 and is indexed to average weekly ordinary time earnings in steps of $2,500.Federal Register of LegislationAustralian Bureau of Statistics
- Contributions tax. Your fund pays 15% tax on concessional contributions as they go in.Federal Register of Legislation
- Salary sacrifice. Sacrificed salary isn't taxed as income, so you save income tax and Medicare levy at your marginal rate, while the fund pays 15%. The calculator works out your 2026–27 tax on your salary with and without the sacrifice to show the real difference.
The formula
- Super guarantee = 12% × min(salary before sacrifice, maximum contributions base).
- If your salary is quoted including super: base salary = package ÷ 1.12.
- Concessional contributions = super guarantee + salary sacrifice; cap left = cap − concessional contributions.
- Added to super = concessional contributions × (1 − 15%).
- Tax saved = tax on full salary − tax on (salary − sacrifice); fall in take-home = sacrifice − tax saved.
Worked example
On a $90,000 salary your employer pays $10,800 a year, or $900 a month, leaving $21,700 of the concessional cap.
Sacrificing $5,000 a year cuts your personal tax by $1,600, so your take-home pay falls by only $3,400 while your super grows by $13,430 in total after contributions tax.
| Line | Per year | Per month |
|---|---|---|
| Salary (qualifying earnings) | $90,000 | $7,500 |
| Employer super guarantee (12%) | $10,800 | $900 |
| Salary sacrifice | $5,000 | $417 |
| Concessional contributions | $15,800 | $1,317 |
| 15% contributions tax (paid by the fund) | -$2,370 | -$197 |
| Added to your super | $13,430 | $1,119 |
Assumptions and limitations
- One employer, a full year. With two employers each pays super guarantee separately, each up to the maximum contributions base.
- Tax comparison uses resident rates, salary only, with hospital cover. It includes HELP repayments if you tick the HELP option, since sacrificed amounts count as repayment income.
- Not modelled: carry-forward of unused cap (available if your total super balance was under $500,000 on 30 June 2026), personal deductible contributions, non-concessional contributions, Division 293 tax for incomes over $250,000 (flagged only), and investment returns.
- Over the cap, the excess is added to your assessable income and you get a 15% tax offset (ITAA 1997 s 291-15).