Don't just calculate your tax โ find out exactly what to do before 30 June to minimise it. For Australians with both PAYG and sole trader income.
From your employer (salary, wages)
From your payment summary / payslip gross minus salary packaging
Total tax withheld shown on your payslip year-to-date
Received a redundancy payout?
Includes unused leave, severance pay
All income received into your business account this FY
Include estimates for income expected before 30 June
Software, tools, subscriptions already paid (e.g. Semrush, hosting)
Fill in your income details and click Calculate
Cash basis: Income counts when you receive it, expenses when you pay them.
Instant asset write-off: Business assets under $20K can be fully deducted in year of purchase (SBE).
Super timing: Must be received by your fund AND Notice of Intent lodged before 30 June.
GST threshold: Register for GST when business turnover hits $75K/year.
Lump Sum D: Genuine redundancy pay is tax-free up to $13,100 + $6,552 ร years of service.
How Australians with dual income use this calculator before 30 June.
$72K salary + $18K ABN income
Sarah's employer withheld tax based on her $72K salary alone. Her $18K of freelance income was never touched.
After entering her numbers, the calculator showed a $4,200 tax gap.
She bought a $1,800 camera and contributed $2,400 to super โ total outlay $4,200, tax gap eliminated. The camera was something she needed anyway.
$0 salary + $85K ABN income
Marcus quit his job mid-year to consult full-time. No employer withheld any tax all year.
Calculator showed $18,500 tax owing with nothing withheld.
After adding $22K in legitimate business expenses (software, home office, car kms) and $5,000 super, his bill dropped to $9,800 โ manageable with his savings buffer.
Lump Sum A/D + $40K ABN income
Lin was made redundant in August and immediately launched her own business. Complex year โ two income sources, a lump sum payout, and severance.
Calculator separated her Lump Sum D (fully tax-free) from Lump Sum A (32% flat rate), showing her true marginal income was much lower than she feared.
She contributed $3,000 to super and purchased a laptop โ reduced her bill from $6,100 to $1,400.
Common questions from Australian sole traders before 30 June.
Only if your annual business turnover (gross income, not profit) reaches $75,000. Below that threshold, GST registration is optional. Once you cross $75K in a 12-month period, you must register within 21 days.
Your super fund must receive the funds before 30 June โ not just the transfer. Bank transfers can take 1โ3 business days, so aim to transfer by 25โ27 June to be safe. You must also submit a Notice of Intent to Claim a Deduction form to your fund and receive their acknowledgment before you lodge your tax return.
Yes. The ATO's fixed rate method for FY2025-26 is 67 cents per hour worked from home. You need to keep a record of hours worked (a diary or calendar entry is fine). This covers electricity, internet, and stationery โ not rent or mortgage interest.
Lump Sum A covers unused annual leave and long service leave paid out when you leave a job. It's taxed at a concessional flat rate of 32% โ separate from your regular income. Lump Sum D is your genuine redundancy (severance) payment. It's tax-free up to $13,100 + $6,552 per completed year of service (FY2025-26 limits). Amounts above that limit are taxed as Lump Sum A.
If your business turnover is under $10 million, you can immediately deduct the full cost of eligible assets costing less than $20,000, purchased and first used (or installed ready for use) before 30 June 2026. The asset must be used for business purposes โ you can only claim the business-use percentage. A laptop used 90% for work = 90% deductible.
Yes โ the cents per kilometre method doesn't require a logbook. For FY2025-26 the rate is 88 cents per kilometre, up to a maximum of 5,000 business kilometres. You do need to be able to demonstrate how you calculated your business kilometres (client addresses, job sites, etc.).
Enter $0 in the PAYG salary field and $0 for tax withheld. The calculator will show your full estimated tax bill based on ABN income alone. As a sole trader with no employer withholding, it's good practice to set aside 25โ30% of gross income in a separate account for your tax bill.
Most deductions must relate to expenses incurred before 30 June โ you can't claim a July purchase in the previous financial year. Super contributions must be received by your fund before 30 June. After that date, any contributions count toward the next financial year. The ATO does not extend these deadlines.