Bonus Tax Calculator 2026-27

How Bonus Tax Works in Australia

In Australia, bonuses are not subject to a separate "bonus tax" rate. Instead, they are treated as part of your total assessable income and taxed under the same progressive bracket system that applies to your regular salary. The tax on a bonus is calculated as the marginal tax that results from adding the bonus amount to your existing salary income. This means the effective tax rate on your bonus depends entirely on your base salary and which tax bracket the bonus pushes you into.

For a worker earning $85 000 in base salary, the marginal tax rate is 30% (plus 2% Medicare Levy = 32%). A $10 000 bonus is added to the $85 000, with the entire bonus falling within the $45 001 to $135 000 bracket. The tax on the bonus is therefore approximately $3 200 (32% of $10 000), and the net bonus take-home is approximately $6 800. However, if the same worker's base salary were $130 000, a $10 000 bonus would push $5 000 into the 37% bracket while $5 000 remains in the 30% bracket, producing a blended effective rate of approximately 35% (including Medicare Levy) and a net bonus of approximately $6 500.

The reason many workers believe bonuses are "taxed more heavily" relates to the withholding method, not the actual tax liability. When your employer processes a bonus payment, they must calculate PAYG withholding based on ATO schedules. The two common methods, Method A and Method B, both tend to produce higher withholding than the actual annual tax liability on the bonus. This over-withholding is corrected when you lodge your tax return, often resulting in a tax refund. The bonus itself is not taxed at a special rate; the apparent discrepancy is purely a timing issue between withholding and actual liability.

Understanding Withholding Methods for Bonuses

Method A: Schedule 5 (Back Payments and Lump Sums)

Under Method A, the employer treats the bonus as a lump sum payment in arrears and applies Schedule 5 of the ATO withholding tables. This method calculates the withholding by first determining the average weekly earnings over the period the bonus relates to, adding the weekly proportion of the bonus, and then looking up the applicable withholding amount. This approach can produce higher withholding because it treats the bonus as if you earn that level of income consistently, which may push the annualised figure into a higher bracket for withholding purposes.

Method B: Annualised Approach

Under Method B, the employer adds the bonus to your regular pay for the period in which it is paid, annualises the combined figure, determines the tax on the annualised amount, and then deducts the tax that would have been withheld on just the regular pay. The difference is the withholding on the bonus. Because the annualised combined figure is higher than your actual annual salary (since the bonus is a one-off payment concentrated in a single period), the withholding can be higher than the true marginal tax on the bonus. Again, any excess withholding is returned to you as a tax refund when you lodge your annual return.

Tax on a $10 000 Bonus at Various Salary Levels

The following table shows the actual annual tax cost of a $10 000 bonus at different base salary levels for Australian residents with no HECS/HELP debt. This is the true economic cost, which may differ from the withholding amount your employer applies.

Marginal rate includes 2% Medicare Levy. At salary levels near bracket boundaries, the bonus may be split across two brackets, producing a blended rate. HECS repayments are not included.

How HECS/HELP Affects Your Bonus

If you hold a HECS/HELP debt, a bonus can have a disproportionate impact on your total deductions. Because HECS repayment rates apply to your entire repayment income (not just the amount above each threshold), a bonus that pushes you into a higher HECS bracket increases the repayment rate on all your income, not just the bonus itself.

Consider a worker earning $93 000 with a HECS debt. At $93 000, the HECS repayment rate is 5.0%, producing an annual repayment of $4 650. A $5 000 bonus pushes repayment income to $98 000, where the rate is 5.5%. The repayment on the full $98 000 is $5 390, an increase of $740 for a $5 000 bonus. Combined with income tax (approximately $1 600 at 32%) and the additional Medicare Levy ($100), the total deductions on the $5 000 bonus are approximately $2 440, leaving a net bonus of only $2 560, an effective rate of about 49%. This high effective rate is driven by the HECS cliff effect at the $94 504 threshold.

Workers near HECS thresholds should be aware of this interaction when expecting bonuses. While the bonus still leaves you better off overall (you are receiving more money), the net benefit may be smaller than expected due to the HECS rate jump. In some cases, it may be worth discussing with your employer whether the bonus can be salary sacrificed into super to reduce its impact on HECS repayment income, though this requires advance planning and employer cooperation.

Strategies to Minimise Tax on Your Bonus

• Salary sacrifice the bonus into super: If your employer allows it, directing your bonus (or part of it) into super means it is taxed at 15% inside the fund rather than your marginal rate. For a worker on $120 000 (32% combined marginal rate), salary sacrificing a $10 000 bonus saves $1 700 in tax. Ensure the contribution stays within the $30 000 annual concessional cap (including employer SG contributions).
• Time the bonus strategically: If you have flexibility in when your bonus is paid (common for business owners or directors), receiving it in a lower-income financial year can reduce the marginal rate. A bonus received in the year you take parental leave, study full-time, or work part-time will attract a lower marginal rate than in a full-earning year.
• Maximise deductions in the bonus year: If you have discretionary deductible expenses (such as prepayable work-related costs, deductible donations, or additional super contributions), incurring them in the same financial year as a large bonus can offset the additional income.
• Understand the withholding vs actual tax difference: If your employer over-withholds on the bonus, you will receive the excess as a tax refund. You can lodge your return as early as possible after 1 July to get the refund sooner, or ask your employer to adjust withholding for the remainder of the year.
• Consider the HECS threshold impact: If a bonus would push you just above a HECS threshold, the marginal cost of that income is higher than normal. While this should not cause you to decline a bonus, understanding the impact helps with accurate budgeting.

Does Your Employer Pay Super on Your Bonus?

In most cases, yes. The ATO's ruling on Ordinary Time Earnings (OTE) classifies performance bonuses, incentive payments, and commissions as OTE, which means the 12% Super Guarantee applies. On a $10 000 bonus, your employer should contribute an additional $1 200 to your super fund. This is a genuine benefit worth $1 200 that is easy to overlook when calculating the total value of a bonus.

However, some types of payments are excluded from OTE and therefore do not attract SG. Overtime payments, reimbursements, and certain lump-sum payments (such as unused annual leave paid on termination) are typically excluded. If your "bonus" is structured as a back-payment for overtime, it may not attract SG. The distinction depends on the nature and purpose of the payment, not its label.

If you believe your employer is not paying SG on a bonus that should be classified as OTE, you can report the issue to the ATO. Employers who fail to pay the required SG face the Super Guarantee Charge, which includes the unpaid super, interest at 10% per annum, and an administrative fee. The SGC is not tax-deductible for the employer, creating a strong incentive to comply.

Bonus Frequency and Annual Tax Reconciliation

A common concern is whether receiving multiple smaller bonuses throughout the year produces a different tax outcome than a single large bonus. From an annual tax perspective, the result is identical. Your total assessable income for the financial year is the sum of all salary, bonuses, and other taxable income, and the tax is calculated on that total. Whether the $20 000 in bonuses arrived as one lump sum in December or as four quarterly payments of $5 000, the annual tax liability is the same.

However, the withholding experience differs. A single large bonus in one pay period causes a spike in withholding for that period (because the annualised income for that period is much higher), followed by normal withholding for the rest of the year. Multiple smaller bonuses spread the additional withholding more evenly. The end result at tax time is the same, but the cash flow during the year may feel different. Workers who receive lumpy income (large bonuses, commissions, or seasonal earnings) should budget based on their expected annual after-tax income rather than relying on the net amount shown on any individual payslip.

Bonus Tax in International Context

Australia's approach to bonus taxation is consistent with its general progressive income tax system. Unlike some countries that apply flat withholding rates to supplementary income (for example, the United States applies a flat 22% federal withholding rate to bonuses), Australia treats bonuses as regular income and applies the marginal rate. This means Australian workers on moderate incomes (under $135 000) often pay less tax on bonuses than their American counterparts, while very high earners (above $190 000) may pay more due to the 45% top rate plus 2% Medicare Levy.

For expatriates and workers comparing compensation packages across countries, it is important to calculate the after-tax bonus in each jurisdiction rather than comparing gross amounts. A $20 000 bonus at a $100 000 salary in Australia yields approximately $13 600 after tax (32% marginal rate), while the same bonus in the US might yield approximately $14 440 after federal and state taxes (depending on the state). These differences, combined with variations in super/401k contributions, healthcare costs, and cost of living, make international compensation comparisons complex.

Sources

• ATO: Income tax rates 2025-26
• ATO: PAYG withholding schedules
• ATO: Super on bonuses and OTE