Will my second job affect my income and tax?
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In today’s dynamic economy, many individuals are considering taking on a second job to supplement their income or pursue their passions. However, before embarking on this journey, it’s crucial to understand the implications that having a second job can have on your overall income and financial situation.

Having a second job can significantly impact your income in various ways, from tax considerations to eligibility for government benefits and superannuation contributions. By delving into these aspects, you can make informed decisions and effectively manage your multiple income streams.

In this blog post, we will explore the topic of having a second job and its specific impact on you. We’ll discuss key aspects such as tax brackets, withholding taxes and superannuation contributions. By understanding these factors, you’ll be better equipped to navigate the financial landscape and make informed decisions about taking on a second job.

Join us as we dive into the intricacies of having a second job and unravel the important considerations that can influence your overall income. Whether you’re contemplating a side gig, freelancing, or starting your own business, this blog post will provide valuable insights to help you make the most of your financial endeavours.

So, let’s explore the impact of having a second job on your income and discover the crucial factors you need to keep in mind.

1. Increased Income and Taxation

When you decide to take on a second job in Australia, the additional income may lead to a significant shift in your financial landscape, specifically in terms of taxation. Australia’s tax system is progressive, which means the more you earn, the higher the tax rate on income within each increasing bracket. For example, if your primary job pays $45,000 annually and you earn an additional $20,000 from a second job, your total income rises to $65,000. Under the progressive tax system, the first $18,200 of your income is tax-free. The income between $18,201 and $45,000 is taxed at a lower rate, while the portion from $45,001 to $65,000 is taxed at a higher rate. It’s important to note that the total tax burden on $65,000 remains consistent whether this income comes from a single job or multiple jobs.

2. Withholding Taxes from Multiple Jobs

Withholding taxes can present a challenge for individuals with multiple jobs. Since each employer calculates withholdings based only on the income they provide, without consideration of your other earnings, this often leads to under-withheld tax. This under-withholding could result in a tax bill at the end of the year if not corrected. To manage this, it is crucial to make informed choices when filling out your tax declaration forms with each employer.

When you have multiple jobs, you should claim the tax-free threshold from the employer where you earn the highest income. For your second job, or any subsequent jobs where the income is lower, you should not claim the tax-free threshold. This approach helps distribute your tax obligations more evenly throughout the year and prevents substantial underpayment that could lead to a tax debt.

Additionally, the Australian Taxation Office (ATO) provides a helpful tool—The Weekly Tax Calculator. This online tool allows you to estimate the correct amount of tax that should be withheld based on your total income from all sources. By inputting your combined earnings from all jobs, you can check if the current tax being withheld is adequate. This proactive approach helps in avoiding any surprises during the tax season, ensuring that you are neither overpaying throughout the year nor facing an unexpected tax debt.

Furthermore, if you find that the amount being withheld is not sufficient, you can request one of your employers to withhold additional tax or make voluntary payments to the ATO. This helps ensure that your tax obligations are met accurately throughout the year, safeguarding against potential fiscal shocks when you file your annual tax return.

By following these guidelines, you can better manage the tax implications of holding multiple jobs and maintain financial stability throughout the fiscal year.

3. Impact on Government Benefits

Taking on a second job can also impact your eligibility for government benefits. In Australia, many government benefits, such as the Family Tax Benefit, Child Care Subsidy, and various Centrelink payments, are income-tested. This means that the amount of benefit you receive is based on your total family income. As your income increases with the addition of a second job, the benefits you receive may be reduced or, in some cases, you may become ineligible. It is crucial to consider these potential reductions when evaluating the true financial benefit of taking on additional work.

However, it’s important to note that the reduction in benefits is generally less than the amount you earn from your second job. This means that while your benefits may decrease, your overall financial situation will likely improve. For instance, if your additional income pushes your total income above certain thresholds, your benefits will decrease gradually, rather than being cut off abruptly. This graduated reduction helps ensure that working additional hours or taking on a second job remains financially worthwhile, even though it might result in reduced government support.

Centrelink benefits, such as JobSeeker Payment or Parenting Payment, also have income tests that determine the amount you receive. For these benefits, earning additional income will typically result in a reduced payment. However, Centrelink uses income tests that allow for a certain amount of income to be earned before payments are affected. For example, JobSeeker Payment recipients can earn up to a certain threshold before their payments begin to reduce, and the reduction rate is applied incrementally. This system is designed to encourage additional work by ensuring that the total financial gain from working more remains positive, despite the reduction in benefits.

It’s essential to regularly review your income and benefits, particularly if your earnings from a second job fluctuate. The Australian Government provides tools and calculators, such as the Centrelink Payment and Service Finder, to help you estimate how your additional income might affect your benefits. By staying informed and proactive, you can better manage the balance between your income and the benefits you receive, ensuring that taking on a second job enhances your financial well-being rather than creating unexpected financial strain.

4. Superannuation Contributions

Employment income from a second job also entails additional superannuation contributions, which can be beneficial for your retirement savings. In Australia, employers are required to contribute a percentage of an employee’s earnings to their superannuation fund, known as the Superannuation Guarantee (SG). As of the time of writing, this rate is 11% of your wage. Therefore, taking on a second job means that your employer for that job will also contribute 11% of your earnings from that job to your superannuation. This can significantly boost your retirement savings over time.

However, it’s important to be aware of the superannuation cap, which is $27,500 for the 2023-2024 financial year. This cap represents the maximum amount of concessional (before-tax) contributions that can be made to your superannuation each year at the concessional tax rate of 15%. Concessional contributions include both employer contributions and any salary sacrifice contributions you may choose to make. If your total concessional contributions from all sources exceed this cap, the excess amount will be subject to additional tax, which can diminish the benefit of these extra contributions.

For example, if you earn $50,000 from your primary job and $30,000 from your second job, your total superannuation contributions would be $8,800 (11% of $80,000). While this is well within the $27,500 cap, if your combined income from multiple jobs and any additional voluntary contributions you make push you over the cap, the excess contributions will be taxed at your marginal tax rate, in addition to the 15% concessional contributions tax. This effectively means you could be taxed at a higher rate on these excess contributions, reducing the overall benefit to your retirement savings.

To manage your superannuation contributions effectively, it is important to keep track of the total amount being contributed from all sources. You can monitor your contributions through your superannuation fund’s online portal or by reviewing the statements they provide. Additionally, if you anticipate exceeding the cap, you can speak with your employers about adjusting your contributions or consider other strategies, such as making non-concessional contributions, which are not subject to the same cap. By staying informed and proactive about your superannuation, you can maximize the benefits of your additional income while avoiding potential tax pitfalls.


Taking on a second job can offer valuable financial benefits, but it also comes with various considerations that need careful management. Understanding the implications on your taxation, government benefits, and superannuation contributions is crucial for making informed decisions. The progressive nature of Australia’s tax system means that additional income will be taxed at higher rates, and proper withholding practices must be maintained to avoid unexpected tax bills. Moreover, additional earnings might affect your eligibility for certain government benefits, but typically, the reduction in benefits will be less than the extra income earned, ensuring overall financial gain.

Furthermore, additional income will boost your superannuation contributions, enhancing your retirement savings. However, staying within the concessional contribution cap is essential to avoid extra taxes. By leveraging tools like the ATO’s weekly tax calculator and staying informed about your superannuation contributions, you can manage your financial situation effectively.

In summary, while the journey of taking on a second job can be rewarding, being proactive and informed about these financial aspects ensures that you can maximize your benefits and avoid potential pitfalls, leading to a more secure and prosperous financial future.

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