How Salary Sacrifice Super Contributions Affect Your Job Offer Comparison

What Is Salary Sacrifice Super?

Salary sacrifice super contributions are an arrangement where you agree to forgo part of your before-tax salary in exchange for your employer paying that amount into your superannuation fund. This reduces your assessable income for tax purposes, meaning you pay less income tax, but the money goes into super where it is taxed at 15% (or 30% for high-income earners). It is a popular way to boost retirement savings while lowering your current tax bill.

When you read a job advertisement, the salary figure quoted is usually the gross annual salary before any salary sacrifice. Some employers advertise a total remuneration package that includes superannuation and salary sacrifice options. Understanding how salary sacrifice super contributions fit into the picture helps you compare offers fairly.

Comparing Job Offers with Salary Sacrifice

Imagine you see two job ads. One offers $90,000 gross with no mention of salary sacrifice. The other offers $85,000 gross but says you can salary sacrifice up to $15,000 into super. Which is better? At first glance, the $90,000 offer seems higher. But after salary sacrifice, the second offer could give you a higher net retirement benefit and lower tax.

To compare, convert both to a common basis. For the second offer, add the sacrificed amount back to the gross salary to get the equivalent gross pay: $85,000 + $15,000 = $100,000. That is the figure you would use to calculate your Salary Index. The index is your yearly gross divided by the national line ($108,352 in 2026–27) times 100. So $100,000 gives an index of about 92.3. The first offer of $90,000 gives an index of about 83.1. The second offer has a higher index, meaning it sits higher against the national average.

But index is only part of the story. Your take-home pay differs because salary sacrifice reduces your taxable income. On $85,000 after $15,000 sacrifice, your assessable income is $70,000. Tax (2026–27 rates, excluding Medicare) is roughly $13,267 plus 2% Medicare levy. Compare to $90,000 with no sacrifice: assessable income $90,000, tax about $19,267 plus Medicare. The salary sacrifice option leaves you with less cash in hand (because the sacrificed amount is locked in super) but more in super. Your decision depends on your need for current cash versus long-term savings.

How the Salary Index Handles Salary Sacrifice

The Salary Index uses gross ordinary-time earnings as reported by the Australian Bureau of Statistics. Gross means before any deductions, including salary sacrifice. So your index score does not change when you salary sacrifice. The index is a measure of your earning level relative to the national benchmark, not your take-home pay. When you see an index of 100, that matches the national full-time adult ordinary-time earnings of $108,352.

If you are comparing offers, always use the gross salary (including any sacrificed amount) for the index. Then separately consider the tax and super effects. The pay guides on this site can help you understand typical award rates and how they relate to the index.

Real-World Example: Retail vs Professional

Suppose you have an offer in retail trade (index 75.9) and another in professional services (index 114.7). The retail offer is $60,000 gross. The professional offer is $90,000 gross with a salary sacrifice super option of $10,000. The retail index is 55.4 (60,000 / 108,352 × 100). The professional index using gross salary is 83.1, but if you include the sacrificed amount, the equivalent gross is $100,000, index 92.3. The professional offer clearly ranks higher on the index. However, the retail job might have a higher award rate or penalty rates. Check the relevant modern award.

Salary sacrifice super contributions are more common in higher-paying industries like professional services, where employees have more capacity to sacrifice. In lower-paying industries, salary sacrifice might not be offered or may be limited.

Tax and Super Considerations

Salary sacrifice super contributions count towards your concessional contributions cap ($30,000 for 2026–27). Your employer’s mandatory super guarantee (12% from 1 July 2026) also counts. If you exceed the cap, the excess is taxed at your marginal rate plus an interest charge. So plan carefully.

When comparing offers, ask the employer if salary sacrifice is available and what the maximum is. Some employers offer it as a standard benefit; others require a formal agreement. The topics page has more on super and tax.

State Differences

Your location also affects your index comparison. For example, the same gross salary in Western Australia (index 106.9) gives a higher relative index than in Tasmania (index 88.6) because the cost of living and average earnings differ. But salary sacrifice super contributions work the same nationally under tax law. Use the states page to see how your state’s average compares.

Summary

When reading a job ad and comparing offers, always look at the total remuneration package. Salary sacrifice super contributions can make a lower gross salary more attractive after tax and super. Use the gross figure (including sacrificed amounts) to calculate your Salary Index. Then model your take-home pay using the tax rates above. Remember that salary sacrifice reduces your cash flow but boosts your super. The index is a tool for comparing earning levels, not take-home pay.

For more detailed guidance, see how the index works and the pay guides.