How Salary Sacrifice Health Insurance Affects Your Gross Pay, Super, and Tax

What Is Salary Sacrifice Health Insurance?

Salary sacrifice health insurance is an arrangement where your employer agrees to deduct the cost of your private health insurance premiums from your pre-tax salary. This reduces your taxable income, meaning you pay less income tax and Medicare levy. The premiums are paid by your employer on your behalf, and the amount sacrificed is not included in your assessable income.

This is different from paying health insurance with after-tax dollars. By using salary sacrifice, you effectively lower your gross pay for tax purposes while still receiving the same health cover. However, the arrangement must be set up through your employer and comply with Australian tax laws.

How It Affects Your Gross Pay and the Salary Index

The Salary Index measures full-time adult ordinary-time earnings. The national line is $108,352 per year (index 100). This figure is based on gross earnings before any deductions, including salary sacrifice. So if you earn $108,352 and salary sacrifice $3,000 for health insurance, your gross pay for index purposes remains $108,352. Your index number stays the same.

But your take-home pay changes because your taxable income drops to $105,352. Using the 2026–27 tax rates, your tax saving depends on your marginal rate. For someone on the 30% bracket (between $45,001 and $135,000), sacrificing $3,000 saves $900 in income tax and $60 in Medicare levy (2%). Your net pay increases by $960 per year, though you still pay the health insurance premium through the sacrifice.

Impact on Superannuation

Super guarantee is 12% of your ordinary time earnings from 1 July 2026. The key question is whether salary sacrificed amounts count as ordinary time earnings. Under Australian law, salary sacrificed amounts are generally included in ordinary time earnings for super guarantee purposes, unless the sacrifice reduces your base salary or is made under a specific award provision. This means your employer should still calculate super on your pre-sacrifice salary.

For example, if your base salary is $108,352 and you sacrifice $3,000, your employer may still pay super on $108,352 (12% = $13,002.24) rather than on $105,352. However, this is not guaranteed. Check your employment contract or award. The pay guides on this site can help you understand your entitlements.

If your super is calculated on the reduced salary, your super contributions will be lower. Over time, this could affect your retirement savings. Always confirm with your employer or payroll department.

Tax Considerations

Salary sacrifice health insurance reduces your taxable income, which lowers your income tax and Medicare levy. The Medicare levy is 2% of taxable income, so every dollar sacrificed saves 2 cents in Medicare levy. You also save income tax at your marginal rate.

For high-income earners, the savings are larger. Someone earning $190,001 (top bracket 45%) who sacrifices $3,000 saves $1,350 in income tax plus $60 Medicare levy. However, be aware of the Medicare levy surcharge if you earn above $90,000 (singles) and do not have appropriate private hospital cover. Salary sacrifice for health insurance can help you meet the requirement, potentially avoiding the surcharge.

Where Does This Fit on the Index?

Your personal salary index is your gross annual pay divided by $108,352, multiplied by 100. Since salary sacrifice does not change your gross pay, your index remains the same. But your effective after-tax income changes. For example, if you earn $108,352 and sacrifice $3,000, your index is still 100, but your after-tax income (excluding super) is higher than someone who does not sacrifice.

To see how your state or industry compares, visit the states and industries pages. The national average varies: NSW index 101.2, VIC 98, WA 106.9. Your own index may differ based on your role and location.

Practical Example

Consider Alex, a full-time professional earning $108,352 per year (index 100). Alex salary sacrifices $2,400 per year ($200 per month) for health insurance. Here’s the breakdown:

• Gross pay: $108,352 (unchanged)
• Taxable income: $105,952
• Income tax (using 2026–27 rates): $0 on first $18,200; 15% on $26,800 = $4,020; 30% on $60,952 = $18,285.60; total $22,305.60 (before Medicare)
• Medicare levy: 2% of $105,952 = $2,119.04
• Total tax: $24,424.64
• Without sacrifice: taxable income $108,352; tax $23,025.60 + Medicare $2,167.04 = $25,192.64
• Saving: $768 per year

Alex also receives super of 12% on $108,352 (if ordinary time earnings include sacrificed amount) = $13,002.24. If super were on $105,952, it would be $12,714.24 – a difference of $288 per year. So Alex needs to confirm which applies.

Important Caveats

Salary sacrifice health insurance is not available to everyone. Your employer must offer it, and the policy must comply with Australian tax rules. Some awards or enterprise agreements restrict salary sacrifice. Also, salary sacrifice can affect other entitlements like leave loading, overtime, or bonus calculations if they are based on base salary.

For more details on how pay is measured, see how the index works. You can also explore topics related to salary packaging and tax.

Conclusion

Salary sacrifice health insurance is a legitimate way to reduce your tax bill while maintaining health cover. It does not change your gross pay index, but it improves your after-tax position. Always check your super guarantee treatment and any award conditions before entering an arrangement. Use the resources on this site to understand your pay relative to the national line.