Two Jobs Tax Calculator Australia: How Much Tax Will You Pay on a Second Income?

Published 4 March 2026 · 7 min read

More Australians than ever are juggling two jobs to make ends meet or accelerate their savings goals. Whether you're working a side hustle on weekends, freelancing after hours, or balancing part-time roles, understanding how the Australian Taxation Office (ATO) treats income from multiple employers is essential. Without proper planning, that extra pay cheque could come with an unexpected tax bill at year-end. This comprehensive guide explains exactly how tax works when you have two jobs in FY 2025-26, what you'll actually take home, and how to stay on the ATO's good side.

How Tax Works When You Have Two Jobs

Australia's tax system operates on a progressive marginal rate — meaning the more you earn, the higher percentage you pay on each additional dollar. This is straightforward with one job, but complications arise when you add a second income stream. The key issue is that your tax-free threshold of $18,200 can only be applied once across all your employment.

When you start any job in Australia, you complete a Tax File Number (TFN) declaration. There's a critical question on this form: "Do you want to claim the tax-free threshold?" You should answer YES for your highest-paying job (your primary source of income) and NO for every other job. This tells your secondary employer to withhold tax from the very first dollar you earn with them — no tax-free buffer applies.

Many people are shocked when their second job seems to attract more tax. But this isn't a penalty — it's simply that those extra dollars are being taxed at the marginal rate that applies once your primary income has already filled the lower tax brackets. Use our income tax calculator to see exactly how your combined income stacks up against the tax brackets.

FY 2025-26 Australian Tax Brackets and Your Two Jobs

The Stage 3 Tax Cuts that took effect on 1 July 2024 continue through FY 2025-26, reducing the tax burden for most Australian workers. However, when you have two jobs, those cuts apply to your combined taxable income, not separately to each employer. Here's how the brackets look for the current financial year:

On top of income tax, most Australians pay the Medicare Levy of 2% on their taxable income. This applies to both jobs' income combined. The levy kicks in once you earn above the exemption threshold of $27,222 for FY 2025-26, with a "shade-in" range up to $34,027 where partial levy applies.

The critical point for two-job workers: your second job income sits on top of your first job income. If your main job pays $60,000, you've already used up the $18,200 tax-free threshold and the $45,000 bracket. Every dollar from your second job enters the tax calculation at the $60,001 mark — squarely in the 30% bracket (plus 2% Medicare). Our Medicare levy calculator can help you factor this into your planning.

Real-World Examples: Tax on Two Jobs in FY 2025-26

Let's walk through three realistic scenarios showing exactly how much tax you'll pay when working two jobs. These calculations include income tax and the 2% Medicare Levy.

Scenario 1: Office Worker + Weekend Retail ($55,000 + $12,000)

Sarah works full-time in administration earning $55,000 annually and picks up weekend shifts at a retail store for an extra $12,000 per year. Her combined income of $67,000 falls well within the 30% tax bracket.

Scenario 2: Teacher + Private Tutoring ($85,000 + $20,000)

Marcus teaches full-time at a public school earning $85,000 and tutors privately in the evenings for an additional $20,000. His combined income of $105,000 keeps him in the 30% bracket but pushes closer to the next threshold.

Scenario 3: Nurse + Agency Shifts ($95,000 + $35,000)

Emma works as a permanent nurse earning $95,000 and picks up agency shifts for an extra $35,000. Her combined income of $130,000 sits near the top of the 30% bracket — any additional income would push into the 37% bracket.

Notice how the effective tax rate on the second job varies significantly depending on where your primary income sits within the tax brackets. The higher your main salary, the more aggressively each second-job dollar is taxed. Use our take-home pay calculator to model your specific situation.

PAYG Withholding: Why Your Second Job Pays Less

When you receive your payslip from your second employer, you might notice they're withholding tax at a rate of 32.5% or higher from the very first dollar. This is standard practice for employers when you don't claim the tax-free threshold — and it's actually designed to protect you.

The ATO provides withholding schedules that employers must follow. For secondary employment, the default "no tax-free threshold" rate is 32.5%, which approximates the combined marginal tax rate plus Medicare levy for most Australian workers. However, if your combined income pushes you into higher brackets, this default withholding may not be enough.

You can request your second employer to withhold tax at a higher rate if you know you'll end up in a higher bracket. Simply provide this request in writing — there's no special ATO form required. This proactive approach prevents a shocking tax bill when you lodge your return.

HECS-HELP and Two Jobs: The Hidden Cost

If you have a HECS-HELP student loan, having two jobs can significantly impact your compulsory repayments. Unlike income tax, which each employer withholds separately, HECS repayments are calculated on your total repayment income — this includes all sources of income plus any reportable fringe benefits and salary sacrifice contributions.

For FY 2025-26, the HECS repayment threshold is $67,000. If your first job alone is below this threshold but your combined income exceeds it, you'll owe HECS repayments at tax time that weren't withheld from your pay during the year. The FY 2025-26 marginal repayment rates are:

• $67,001 – $125,000: 15 cents for each dollar above $67,000
• $125,001 – $179,285: $8,700 plus 17 cents for each dollar above $125,000
• $179,286 and above: 10% of your total repayment income

For example, if your combined income reaches $90,000 and you have HECS debt, your compulsory repayment would be ($90,000 − $67,000) × 15% = $3,450. This is in addition to your regular income tax. Our HECS-HELP calculator can show you exactly how much you'll owe based on your combined income.

Superannuation Contributions from Two Employers

Every employer in Australia must make Superannuation Guarantee (SGC) contributions on your behalf. In FY 2025-26, the rate is 12% of your ordinary time earnings. When you have two jobs, both employers must contribute to your super fund — which is great for building your retirement savings.

However, there's a catch: the concessional contributions cap is $30,000 for FY 2025-26. This cap includes employer SGC contributions from all jobs plus any salary sacrifice or personal deductible contributions you make. If your combined employer contributions approach this limit, you need to be careful.

For instance, if Job 1 pays $90,000 (SGC = $10,800) and Job 2 pays $30,000 (SGC = $3,600), your total employer contributions are $14,400 — well under the cap. But if you're a high earner with two substantial incomes, you could approach or exceed the $30,000 limit. Excess contributions are taxed at your marginal rate rather than the concessional 15% super rate. Track your total contributions using our superannuation calculator.

Strategies to Minimise Tax on Two Jobs

While you can't avoid tax on your second job, you can take steps to manage your tax position and avoid surprises:

• Request additional withholding from your second employer. If you know your combined income will push you into a higher tax bracket, ask your second employer to withhold at a higher rate. This prevents a tax bill at year-end.
• Never claim the tax-free threshold twice. Only claim it at your highest-paying job. Claiming at both employers is a guaranteed path to a tax debt.
• Set aside a tax buffer from each second-job pay. Transfer 32-45% (depending on your combined income level) of each second-job pay cheque to a separate savings account. This money is for the ATO, not you.
• Consider salary sacrificing at your main job. Salary sacrificing into super reduces your taxable income, potentially keeping you in a lower marginal bracket. This means less tax on both your primary and secondary income. Use our salary sacrifice calculator to explore this option.
• Keep meticulous records of work-related deductions. Deductions for either job reduce your taxable income. Keep receipts for uniforms, training, travel between workplaces, and home office expenses.
• Review your private health insurance if combined income exceeds $101,001. The Medicare Levy Surcharge (MLS) applies if your income crosses this threshold and you don't have adequate hospital cover. A second job can easily push you into MLS territory.

Will You Owe Tax or Get a Refund?

When you lodge your tax return, the ATO calculates your total tax liability based on your combined income from all sources, then compares it to what was withheld during the year. The difference determines whether you owe money or receive a refund.

You'll likely owe money if: Your second employer withheld at the default 32.5% rate, but your actual marginal rate on that income is higher (37% or 45% bracket). This shortfall must be paid when you lodge your return.

You might get a refund if: Your combined income was lower than expected, or if one or both employers over-withheld tax during the year. However, refunds are less common for two-job workers because the secondary withholding rates are typically conservative.

The most important thing is to not bury your head in the sand. If you suspect you'll owe tax, start setting money aside immediately. The ATO offers payment plans for those who can't pay their tax debt in full, but penalties and interest apply.

Summary: Key Takeaways for Two-Job Taxpayers

Here's what every Australian working two jobs needs to remember for FY 2025-26:

• The tax-free threshold ($18,200) can only be claimed at one employer — always your highest-paying job
• Your second job income is taxed at your marginal rate based on combined income from both jobs
• Second job withholding starts at 32.5% but your actual marginal rate may be higher
• HECS repayments are calculated on total income — a second job can trigger compulsory repayments
• Crossing $101,001 combined income may trigger the Medicare Levy Surcharge without private hospital cover
• Both employers must pay 12% super — watch your $30,000 concessional contributions cap
• Request higher withholding from your second employer if needed to avoid a year-end tax bill
• Set aside 32-45% of each second-job pay cheque depending on your income bracket

Working two jobs is an increasingly common way Australians boost their income, pay down debt faster, or accelerate their savings. While the tax implications can seem daunting at first, understanding how the system works puts you in control. The key is knowing what to expect and planning accordingly. Use our take-home pay calculator to model your exact situation, and check out our income tax calculator to see precisely how much of your second income stays in your pocket after the ATO takes its share.