No — a second job is not taxed at a higher rate in Australia. The ATO adds up everything you earn in the year and taxes the total at the normal progressive rates. But your second-job payslip will almost certainly look like you are being punished: tax comes off from the very first dollar, while your main job’s first $18,200 goes through untouched. That gap is withholding, not extra tax — and it sorts itself out when you lodge your return.
There is a catch, though. Even when you set everything up correctly, a second job can still leave you with a tax bill of a few thousand dollars — and most guides never show you the maths. This guide does: the exact 2026–27 rates, what your payslip should look like, a worked $60k + $20k example with a $3,000 shortfall nobody warns you about, the HECS trap, the super angle, and how to fix your withholding before July.
The one rule that explains everything
Every Australian resident gets a $18,200 tax-free threshold each year — the first $18,200 of income is not taxed. The critical detail: it applies to your total income from all jobs combined, not $18,200 per job.
When you start a job, you fill in a Tax File Number (TFN) declaration. One question asks whether you want to claim the tax-free threshold from that payer. The ATO’s position is simple: if you have more than one job at a time and your combined income will exceed $18,200, you generally claim it from only one employer — usually the one that pays you the most. Tell the second employer “no”.
Why it matters on your payslip:
- Main job (threshold claimed): payroll withholds nothing on the first $18,200 of annualised pay ($350 a week, $700 a fortnight). Withholding starts gently above that.
- Second job (threshold not claimed): payroll withholds tax from the first dollar, at 15% on the early dollars (under the 2026–27 no-threshold scale). No $18,200 of breathing room.
Your second employer has no idea what your first job pays — each payroll system only sees its own numbers. Getting the threshold claim right is your job, not theirs.
2026–27 rates: the table your second job stacks onto
Your second job’s income sits on top of your main income. So if your main job pays $60,000, your second job’s dollars are taxed at your marginal rate — 30% — not at some special “second job” rate. The resident rates for 2026–27 (excluding the 2% Medicare levy):
| Taxable income | Tax on this income |
|---|---|
| $0 – $18,200 | Nil |
| $18,201 – $45,000 | 15c for each $1 over $18,200 |
| $45,001 – $135,000 | $4,020 plus 30c for each $1 over $45,000 |
| $135,001 – $190,000 | $31,020 plus 37c for each $1 over $135,000 |
| $190,001 and over | $51,370 plus 45c for each $1 over $190,000 |
The only change from 2025–26 is the second bracket dropping from 16% to 15%. The Low Income Tax Offset (up to $700, gone by $66,667) still applies, and from 1 July 2026 there is also the new $1,000 standard work-related deduction to factor into your return. If you want the full bracket breakdown with worked salaries, see our 2026–27 income tax rates guide — and you can run your own combined income through the income tax calculator.
What your payslip actually looks like
Take a $1,000 fortnightly pay — the same gross, two different jobs:
- As a main job (threshold claimed): annualised pay is $26,000, so roughly 15% × ($26,000 − $18,200) ÷ 26 ≈ $45 tax per fortnight, plus $20 Medicare levy — about $65 withheld. Take-home: ~$935.
- As a second job (threshold not claimed): tax from the first dollar at roughly 15% — about $150 tax per fortnight, plus $20 Medicare levy — about $170 withheld. Take-home: ~$830.
Same $1,000, $105 less in your pocket. That $105 is not a penalty — it is roughly the tax those dollars will actually owe at your marginal rate. (Figures are approximate; payroll software follows the ATO withholding tables, which annualise your pay and round.)
Worked example: the $3,000 bill nobody warns you about
Here is the scenario most guides skip. Maya earns $60,000 at her main job (threshold claimed) and $20,000 at a weekend retail job (threshold not claimed). She did everything right. She still gets a bill.
Actual tax on $80,000 total (2026–27):
- 15% × ($45,000 − $18,200) = $4,020
- 30% × ($80,000 − $45,000) = $10,500
- Income tax: $14,520 · Medicare levy 2%: $1,600 · LITO: $0 (over $66,667)
- Total liability: $16,120
What was withheld during the year:
- Main job ($60k, threshold claimed): roughly tax on $60,000 alone = $8,520, plus $1,200 Medicare levy ≈ $9,720
- Second job ($20k, no threshold): roughly 15% × $20,000 = $3,000, plus $400 Medicare levy ≈ $3,400
- Total withheld: ~$13,120 → shortfall of about $3,000
Where did the $3,000 go? Her second job’s entire $20,000 sits in the 30% bracket (her main job already filled the 0% and 15% brackets), so it genuinely owes $6,000 in tax — but the second payroll, seeing only $20,000, withheld at 15% ($3,000). Each employer followed the tables perfectly; the tables just cannot see your other income. This is the real second-job tax trap, and the fix is below.
The double-claim mistake: an ~$8,000 bill
The most expensive error is claiming the threshold at both jobs — each payroll then treats $18,200 as tax-free. Take two $40,000 jobs ($80,000 total):
- Withheld at each job ≈ 15% × ($40,000 − $18,200) = $3,270 → $6,540 across both (plus ~$1,600 Medicare levy withholding)
- Actual liability on $80,000: $16,120
- Bill at tax time: roughly $8,000
If you have done this, fix it now — not in June. Give one employer a fresh Withholding declaration (NAT 3093) answering “no” to the threshold question. The ATO allows it any time your circumstances change.
The one exception: if your total income from all jobs will stay under $18,200 for the year — common for students and short-term casuals — the ATO lets you claim the threshold from more than one payer. If you cross $18,200, expect a bill.
The HECS/HELP trap: a $2,321 surprise
Student-loan repayments are where second jobs bite hardest, because neither employer may withhold a cent of it. HELP repayments are based on your combined repayment income, but each payroll only withholds HELP if that job alone annualises above the threshold — $69,528 in 2026–27.
Example: main job $60,000 + second job $25,000 = $85,000 repayment income.
- HELP repayment: 15c × ($85,000 − $69,528) = 15c × $15,472 = $2,320.80
- Withheld by employers: $0 — the $60,000 job annualises under $69,528, and so does the $25,000 job.
- Result: a $2,321 bill at tax time, on top of any income-tax shortfall.
The defence: tick “yes” to having a HELP debt on every TFN declaration (including the second job), and consider asking your main employer for extra voluntary withholding. Our HECS/HELP 2026–27 guide has the full repayment table.
Don’t forget super on the second job
Two super facts second-job holders miss:
- Your second employer owes you super too. The 12% Super Guarantee (2026–27 rate) applies per employer — there is no minimum monthly earnings threshold anymore. A $20,000 second job should come with roughly $2,400 in SG contributions. Check it lands in your fund.
- The concessional cap is per person, not per job. The 2026–27 cap is $32,500 across everything. If two employers’ SG plus your salary sacrifice exceed it — say $300,000 combined salary → ~$36,000 SG — the ~$3,500 excess gets taxed at your marginal rate (less a 15% offset). High earners with two jobs should watch this; see the contribution caps guide.
Also note: second-job income counts toward the Medicare levy surcharge income test, so a second job can tip you over the surcharge threshold if you do not hold private hospital cover.
Second income as a sole trader (ABN, no boss)
If your “second job” is freelance, gig or contract work under an ABN, there is no employer withholding at all. The ATO still taxes it — it stacks onto your employment income at your marginal rate — but nothing is collected during the year. Set aside roughly your marginal rate (30% for most second-income earners, plus 2% Medicare levy) from every invoice, or the ATO will put you on PAYG instalments — quarterly prepayments of next year’s tax. Deductible costs (tools, home office, car) reduce the damage; our deductions checklist covers what you can claim.
Five mistakes second-job holders keep making
- Claiming the threshold at both jobs — the ~$8,000 bill above. One claim, highest-paying job.
- Assuming the payslip is the final tax — withholding is a down payment; the return is the real calculation.
- Ignoring HELP — the $2,321 trap above. Tick the HELP box on every TFN declaration.
- Forgetting to declare both incomes — both payment summaries pre-fill in myTax, and the ATO matches them. Declare everything.
- Not checking super — second-job SG is legally yours; the cap is legally your problem.
How to stop the annual bill: three fixes
- Ask for extra withholding. The simplest fix — tell one employer’s payroll to withhold an extra amount each pay (say, $60 a fortnight). It is your money, just collected early, and it kills the EOFY surprise.
- Lodge a PAYG withholding variation (upward). If you can estimate the shortfall — Maya’s $3,000 above, for example — the ATO lets you vary withholding upward so the right amount comes out across the year.
- Put it aside yourself. Open a separate account and sweep your marginal rate (e.g. 32% including Medicare levy) off every second-job pay. Less elegant, same result.
And every July: check myGov pre-fill shows both payment summaries before you lodge. If one is missing, wait — lodging early on incomplete pre-fill is how double-claim mistakes go unnoticed.
FAQ
Do I pay a higher tax rate on my second job?
No. There is no special “second job” rate. All your income is added together and taxed at the normal progressive rates. It feels higher because tax is withheld from the first dollar (no $18,200 threshold on the second job) and because those dollars genuinely sit in a higher bracket than the first dollars of your main job.
Which job should I claim the tax-free threshold on?
The higher-paying or most regular one — that is where the $18,200 of tax-free room saves you the most withholding across the year. Answer “no” on the second job’s TFN declaration.
What happens if I claimed the threshold on both jobs?
Too little tax is withheld and you will likely owe money when you lodge — potentially several thousand dollars (see the ~$8,000 example above). Fix it by giving one employer a new Withholding declaration (NAT 3093) with the threshold unclaimed.
Can I claim the threshold on two jobs if I earn under $18,200 in total?
Yes — if your total annual income from all sources will stay under $18,200, the ATO allows it. But if you end up earning more, you will likely face a bill.
Do I have to tell my second employer about my first job?
For tax purposes, no — you just answer the TFN declaration honestly (threshold: no; HELP debt: yes if you have one). Your employment contract may separately require disclosing other work, so check it.
Will a second job affect my HECS/HELP repayments?
Yes — repayments are calculated on combined repayment income, and neither employer may withhold any if each job alone sits under the $69,528 threshold. The worked example above shows a $2,321 bill from a $25,000 second job. Tick the HELP box on every TFN declaration and consider extra withholding.
How do I check what I should have paid?
Add both incomes together and run the total through the income tax calculator, then compare with the total tax withheld on your payment summaries. The difference is roughly your refund or bill — before deductions, HELP and offsets.
The bottom line
A second job does not attract extra tax — it attracts correctly stacked tax. Claim the $18,200 threshold once, expect heavy withholding on the second payslip, and budget for the gap between what two blind payroll systems withhold and what your combined income actually owes. Do that, tick the HELP box, check your super, and the second job stays what it should be: extra money, not an extra bill.
Figures use verified 2026–27 ATO rates (15% second bracket, 2% Medicare levy, $69,528 HELP threshold). Withholding examples are approximate — payroll software follows the ATO tax tables. For the ATO’s own guidance, see ato.gov.au: claiming the tax-free threshold.
