Salary sacrificing into your superannuation is one of the most tax-effective ways to build your retirement savings while reducing your current income tax. Instead of receiving part of your salary as take-home pay, you arrange for your employer to contribute that amount directly into your super fund, where it is taxed at just 15 per cent rather than your marginal tax rate.

For Australian workers on middle to high incomes, the tax savings can be substantial. If you earn over $45,000 per year, salary sacrifice can deliver immediate tax benefits while boosting your retirement nest egg. Here are five essential things you need to know about how it works and what you will save.

1. Your Employer Pays Contributions Directly into Your Super

Salary sacrifice is a formal arrangement with your employer to redirect part of your pre-tax salary into your superannuation fund as a concessional contribution. According to the Australian Taxation Office, these contributions are taxed at 15 per cent inside your super fund, rather than at your marginal income tax rate (which can be as high as 47 per cent including the Medicare levy for top earners).

The arrangement must be agreed to in writing before you earn the salary. You cannot sacrifice income you have already earned. Most employers allow you to adjust your salary sacrifice amount quarterly or annually, giving you flexibility to respond to changes in your financial situation.

Your employer processes the salary sacrifice amount as a concessional contribution along with their compulsory Superannuation Guarantee (SG) contributions. Both count towards the annual concessional contributions cap.

2. The Tax Savings Increase with Your Income

The higher your marginal tax rate, the greater your tax saving from salary sacrifice. As ASIC MoneySmart explains, the difference between the 15 per cent contributions tax in your super fund and your marginal tax rate determines your benefit.

For example, if you earn $90,000 per year (marginal tax rate 32.5 per cent plus 2 per cent Medicare levy, totalling 34.5 per cent), salary sacrificing $10,000 would save you approximately $1,950 in tax. That same $10,000 would only be taxed at 15 per cent in your super fund ($1,500), compared to $3,450 if you received it as salary.

Workers on higher incomes see even greater benefits. At a marginal rate of 47 per cent (including Medicare levy), the tax saving on a $10,000 salary sacrifice would be approximately $3,200.

The tax saving is not paid to you directly. Instead, more of your money stays in your super fund, compounding over time until you reach preservation age (currently 60 for most Australians).

3. You Must Stay Within the Concessional Contributions Cap

All concessional contributions to your super, including your employer’s SG contributions and any salary sacrifice amounts, count towards an annual cap. For the 2026-27 financial year, the concessional contributions cap is $30,000.

If you exceed the cap, you will pay additional tax on the excess contributions at your marginal tax rate, minus a 15 per cent offset. This effectively removes the tax advantage of the excess amount and may also incur an excess concessional contributions charge.

Before arranging salary sacrifice, calculate your total expected concessional contributions for the year. If your employer contributes the standard SG rate of 12 per cent (effective from 1 July 2025) on a $90,000 salary, that equals $10,800 in SG contributions, leaving you $19,200 of cap space for salary sacrifice.

Workers who have total super balances under $500,000 may be able to carry forward unused concessional cap amounts from previous years, potentially allowing contributions above $30,000 in a single year. Check your super balance and contribution history at myGov or consult with a registered tax agent to determine your available cap space.

Read also: How to Maximise Your Superannuation Contributions Before 30 June in Australia

4. Salary Sacrifice Reduces Your Take-Home Pay

While salary sacrifice delivers tax savings and boosts your super balance, it reduces your take-home pay. The money goes straight into your super fund and is generally preserved until you reach preservation age (currently between 55 and 60, depending on your birth year) or meet another condition of release, such as retirement.

Before committing to salary sacrifice, ensure you can comfortably meet your current living expenses with the reduced take-home amount. This strategy works best when you have already built an adequate emergency fund (typically three to six months of expenses in an accessible savings account) and do not carry high-interest debt such as credit card balances.

Salary sacrifice also reduces your assessable income for certain means-tested benefits and obligations, including HECS-HELP repayment thresholds, the Medicare levy surcharge, and some family assistance payments. Depending on your circumstances, this can deliver additional benefits or affect your eligibility for government support.

5. You Can Combine Salary Sacrifice with Other Super Strategies

Salary sacrifice is just one way to make concessional contributions to your super. Foundational texts such as Principles of Finance explain that retirement planning benefits from a diversified contribution strategy tailored to your income and life stage.

You can combine salary sacrifice with personal deductible contributions if you are self-employed or earn income your employer does not process through payroll. You can also make non-concessional (after-tax) contributions up to $120,000 per year (or more using the bring-forward rule), though these do not deliver an immediate tax deduction.

If you are saving for your first home, consider the First Home Super Saver Scheme (FHSS), which allows you to make voluntary concessional and non-concessional contributions and later withdraw up to $50,000 (plus associated earnings) to put towards a first home deposit. Salary sacrifice contributions are eligible for the FHSS.

Review your salary sacrifice arrangement annually, particularly after salary increases, changes to the concessional contributions cap, or shifts in your financial priorities. Many Australians increase their salary sacrifice rate after paying off a mortgage or when children finish school, redirecting former loan repayments or school fees into retirement savings while the reduced take-home pay feels manageable.

General Advice Warning: This article provides general information only and does not constitute personal financial advice. It has been prepared without taking into account your objectives, financial situation or needs. Before acting on any information in this article, you should consider whether it is appropriate for you and seek advice from a licensed financial adviser if necessary.

Take Control of Your Retirement Savings

Salary sacrificing into super is a proven strategy to reduce your current tax bill and build a stronger retirement outcome. The tax savings are immediate, and the compounding effect over decades can significantly increase your super balance at retirement.

Before arranging salary sacrifice, verify your current total concessional contributions for the year, confirm you have adequate cash reserves for living expenses, and check your employer’s process for setting up the arrangement. The ATO’s online tools at ato.gov.au and ASIC’s MoneySmart calculator can help you model the tax savings and long-term impact of different contribution levels.

All rates, caps and thresholds are current as of October 2026 and are subject to change. Verify the latest contribution caps and preservation age rules at ato.gov.au before making any decisions.