Two Jobs Tax Calculator
Working multiple jobs in Australia? Calculate your combined tax liability, check if your PAYG withholding is correct, and see whether you'll have a tax debt or refund at tax time.
Your Income Details
Job 1 (Primary)
Job 2 (Secondary)
Your Tax Summary
Combined Gross Income
$75,000
Total Tax Liability
$14,788
19.7% effective rate
Total PAYG Withheld
$9,788
Estimated Tax Debt
$5,000
You may need to pay this when you lodge your tax return
Tax Breakdown
| Component | Amount |
|---|---|
| Income Tax (on $75,000) | $13,288 |
| Medicare Levy (2%) | $1,500 |
| Total Tax Liability | $14,788 |
| Less: Job 1 PAYG Withheld | -$5,788 |
| Less: Job 2 PAYG Withheld | -$4,000 |
| Tax Debt | $5,000 |
Tax-Free Threshold Scenarios
Your Current Setup
TFT at Job 1 only
Total Withheld: $9,788
Debt: $5,000
Optimal Setup
TFT at Job 1 only (highest paying)
Total Withheld: $9,788
Debt: $5,000
Common Mistake
TFT claimed at both jobs
Total Withheld: $6,876
Debt: $7,912
Income Split
Tax Breakdown
Tips for Managing Multiple Jobs
Claim tax-free threshold at your highest-paying job only. This ensures the correct amount of tax is withheld across both jobs.
Update your TFN declaration forms if circumstances change. If your primary job changes, update your employer so the correct tax is withheld.
Set aside money for potential tax debt. Even with correct TFT setup, you may owe tax due to reaching higher tax brackets.
Consider voluntary PAYG withholding. You can ask your employer to withhold extra tax to cover potential shortfalls.
Lodge your tax return on time. If you owe tax, lodging on time prevents interest and penalties.
Disclaimer
This calculator provides estimates based on FY 2025-26 Stage 3 tax rates and simplified withholding calculations. Actual PAYG withholding uses ATO coefficient tables and may differ slightly. This is for educational purposes only and does not constitute tax advice. Consult a registered tax agent for your specific circumstances. The calculator does not account for HECS-HELP debt, private health insurance rebate adjustments, or other individual circumstances that may affect your tax outcome.
Understanding Tax with Two Jobs
When you work two or more jobs in Australia, your total income determines your tax rate - but PAYG withholding at each job is calculated independently. This can lead to under-withholding and a tax debt if not managed correctly.
The Tax-Free Threshold
The first $18,200 you earn each year is tax-free. You can only claim this threshold at ONE job. Claiming it at multiple jobs will result in under-withholding and a tax debt.
Why You Might Owe Tax
Each employer withholds tax as if that job is your only income. When combined, your total income may push you into a higher tax bracket, meaning the withheld tax wasn't enough.
Example: How Multiple Jobs Affect Tax
Let's look at a typical scenario of someone earning $50,000 at their primary job and $25,000 at a casual second job:
| Scenario | Tax Withheld | Actual Tax Owed | Outcome |
|---|---|---|---|
| TFT at both jobs (wrong) | ~$5,720 | ~$12,288 | ~$6,568 debt |
| TFT at Job 1 only (correct) | ~$10,128 | ~$12,288 | ~$2,160 debt |
| + Extra withholding | ~$12,288 | ~$12,288 | Balanced |
*Based on FY 2025-26 Stage 3 tax rates (0%/16%/30%/37%/45%) including 2% Medicare levy. Actual amounts may vary.
How to Avoid a Tax Debt
- Claim the tax-free threshold at your highest-paying job only. When starting a second job, tick "No" to claiming the tax-free threshold on your TFN declaration form.
- Request additional withholding. Even with correct TFT setup, you may still owe tax. Use ATO's additional withholding form to have extra tax taken from your pay.
- Save a percentage of your second job income. A good rule of thumb is to set aside 30-35% of your second job income for tax.
- Consider PAYG instalments. If you regularly owe tax, the ATO may ask you to pay quarterly instalments.
- Lodge your tax return on time. If you owe tax, lodge by the deadline to avoid interest charges.
Frequently Asked Questions
Can I claim the tax-free threshold at two jobs?
No, you can only claim the tax-free threshold at one employer. If you claim it at multiple jobs, your employers will each withhold less tax than needed, resulting in a debt at tax time. However, it's not illegal - you just need to pay the correct amount when you lodge your return.
Which job should I claim the tax-free threshold at?
Claim it at your highest-paying job (the one where you earn the most). This ensures the most appropriate amount of tax is withheld across your jobs. If your main job changes, update your TFN declaration with your employers.
Will I always owe tax with two jobs?
Not necessarily. If your combined income is low enough, or if you have significant deductions, you may still receive a refund. However, most people with two jobs find they owe some tax because the combined income pushes them into a higher tax bracket.
How do I update my tax-free threshold claim?
Complete a new TFN declaration form with your employer and tick the appropriate box for whether you're claiming the tax-free threshold. You should do this when starting a new job, when your circumstances change, or if you realise you've claimed it incorrectly.
Does casual or part-time work count as a second job?
Yes, any paid employment where you receive a payment summary (income statement) counts toward your total income and affects your tax. This includes casual work, part-time jobs, and any employment where tax is withheld.
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