Home / Guides / Tax, super and packaging
Salary Sacrifice into Super Calculator: How It Affects Your Gross Pay, Tax, and Super
A salary sacrifice into super calculator shows how redirecting pre-tax pay to super changes your gross pay, tax, and super balance. Understand the national index and your take-home
A salary sacrifice into super calculator helps you see how redirecting pre-tax pay to super changes your gross pay, tax, and super balance. The national index is 100, but your result depends on your salary and sacrifice amount.
What Is a Salary Sacrifice into Super Calculator?
A salary sacrifice into super calculator is a tool that estimates how redirecting part of your pre-tax salary into superannuation changes your gross pay, tax, and super balance. It helps you compare your current situation with a scenario where you sacrifice a set amount each pay period. The calculator uses your salary, sacrifice amount, and frequency to show:
- Your new taxable income and the tax saved.
- Your reduced take-home pay.
- The extra super contributions (including the 15% contributions tax).
- Your total super balance growth over time.
Because salary sacrifice reduces your taxable income, it can lower your personal Salary Index – the measure of your gross pay against the national line of 100. But the trade-off is a larger super nest egg.
How Salary Sacrifice Affects Your Gross Pay and the National Index
The national index is set at 100, which equals full-time adult ordinary-time earnings of $108,352 per year (ABS Average Weekly Earnings, May 2026). If you earn $100,000 and sacrifice $10,000, your taxable gross pay becomes $90,000. That gives you a personal index of about 83 ($90,000 ÷ $108,352 × 100). However, your total remuneration – including the super contribution – is still $100,000 plus the employer's super guarantee.
Salary sacrifice does not change the national benchmark; it only affects your personal index if you use taxable gross pay. Some calculators also show your index after sacrifice, but the key point is that you are trading current taxable income for future super savings.
Tax Savings from Salary Sacrifice
Salary sacrifice into super is concessional – the contribution is taxed at 15% inside the fund, not at your marginal rate. The tax saving is the difference between your marginal rate (plus Medicare) and the 15% super tax.
Using the 2026–27 tax rates:
| Taxable income | Marginal rate + Medicare | Tax on $1 sacrificed | Super tax (15%) | Net saving |
|---|---|---|---|---|
| $18,201–$45,000 | 17% (15% + 2%) | $0.17 | $0.15 | $0.02 |
| $45,001–$135,000 | 32% (30% + 2%) | $0.32 | $0.15 | $0.17 |
| $135,001–$190,000 | 39% (37% + 2%) | $0.39 | $0.15 | $0.24 |
| Over $190,000 | 47% (45% + 2%) | $0.47 | $0.15 | $0.32 |
For someone earning $100,000 (32% bracket), sacrificing $10,000 saves $3,200 in tax and Medicare. The $10,000 in super is taxed at 15% ($1,500), so the net benefit is $1,700. Your take-home pay drops by $6,800, but your super grows by $8,500.
Super Guarantee and Salary Sacrifice
From 1 July 2026, the super guarantee is 12% of ordinary time earnings (OTE), up to a maximum contribution base of $270,830. Salary sacrifice amounts are generally part of your OTE, so your employer must still pay 12% on your full salary before sacrifice. This means salary sacrifice is an additional contribution on top of the mandatory employer amount.
Example: You earn $100,000 and sacrifice $10,000. Your employer pays $12,000 super (12% of $100,000). You add $10,000 via salary sacrifice. Total super for the year: $22,000. Without sacrifice, you would have only the $12,000 employer contribution.
Using the Calculator
A typical salary sacrifice into super calculator asks for:
- Your current annual salary (or hourly rate and hours).
- The amount you want to sacrifice each pay period (weekly, fortnightly, or monthly).
- Your marginal tax rate (or the calculator estimates it from your salary).
- Your current super balance (optional, for long-term projections).
Outputs include:
- New taxable income and take-home pay.
- Tax saved per pay period and annually.
- Extra super contribution after 15% tax.
- Projected super balance at retirement (with assumed investment returns).
Remember that the calculator gives estimates. Your actual results depend on your award, employer policy, and whether you have other reportable super contributions. Check your pay guides or talk to your payroll team.
Things to Keep in Mind
- Concessional contributions cap: The ATO sets an annual limit on before-tax super contributions (including salary sacrifice and employer amounts). Exceeding the cap incurs extra tax. The cap for 2026–27 is not shown here; check the ATO website.
- Division 293 tax: If your income plus concessional contributions exceed $250,000, you pay an additional 15% tax on some or all of your contributions.
- Government co‑contributions: Salary sacrifice does not qualify for the government super co‑contribution (that is for after-tax contributions).
- Impact on other entitlements: Salary sacrifice reduces your taxable income, which may affect family tax benefit, child support, or the Medicare levy surcharge. Use a calculator that accounts for these, or seek advice.
- State and industry differences: The national index varies by state and industry. For example, NSW has an index of 101.2, while Retail trade is 75.9. Your personal index after sacrifice will sit relative to these benchmarks.
A salary sacrifice into super calculator is a practical way to see the trade-off between today's pay and tomorrow's super. Use it alongside your Salary Index to understand where you stand nationally. Always consider your own financial situation and goals before committing to a salary sacrifice arrangement.
Questions people ask
How does salary sacrifice into super affect my take-home pay?
Salary sacrifice reduces your taxable income, so less tax is withheld from your pay. However, your take-home pay decreases by the amount you sacrifice minus the tax saved. For example, if you earn $100,000 and sacrifice $10,000, your taxable income drops to $90,000. At the 30% marginal rate plus 2% Medicare, you save $3,200 in tax. Your take-home pay falls by $10,000 minus $3,200, or $6,800. The $10,000 goes into super and is taxed at 15% ($1,500), leaving $8,500 added to your super account.
Is salary sacrifice into super worth it for high-income earners?
Yes, because higher marginal tax rates mean greater tax savings. For someone earning $190,000 or more, the top marginal rate is 45% plus 2% Medicare, so every dollar sacrificed saves 47 cents in tax. The contribution is taxed at 15% in super (or 30% if income exceeds $250,000 due to Division 293 tax), so the net benefit is still significant. However, you must stay within the annual concessional contributions cap, and the benefit reduces if you are close to the cap or have a low super balance.
Does salary sacrifice into super affect my employer's super guarantee contributions?
No, salary sacrifice amounts are generally included in your ordinary time earnings (OTE) for super guarantee purposes. Your employer must still pay 12% on your full salary before sacrifice. For example, if your salary is $100,000 and you sacrifice $10,000, your employer's super guarantee is 12% of $100,000 ($12,000), not 12% of $90,000. The sacrificed $10,000 is an additional contribution on top of the employer's mandatory amount.