Sole Trader Tax Calculator Australia 2026–27
Estimate business profit, individual tax, Medicare, HELP and a monthly or quarterly tax reserve.
Last reviewed 7 October 2026 · Estimate only, not tax advice
Calculate your estimate
2026–27 financial year · Australian dollars · results update automatically
Results update automatically
Sole Trader Tax Calculator
- Net business profit
- $90,000.00
- Income tax
- $17,520.00
- Medicare levy
- $1,800.00
- HELP repayment
- $0.00
- Recommended annual reserve
- $21,252.00
- Monthly reserve
- $1,771.00
- Quarterly reserve
- $5,313.00
2026–27 resident income tax rates
Each rate applies only to the part of taxable income inside that band. Medicare, MLS and HELP are calculated separately.
| Taxable income | Marginal rate |
|---|---|
| $0 – $18,200 | 0% |
| $18,200 – $45,000 | 15% |
| $45,000 – $135,000 | 30% |
| $135,000 – $190,000 | 37% |
| Over $190,000 | 45% |
How this calculator works
Estimate business profit, individual tax, Medicare, HELP and a monthly or quarterly tax reserve. Inputs are validated, passed to the versioned Australia engine, and recalculated immediately whenever a field changes.
Formula
Profit = revenue − deductible business expenses; profit then enters the individual tax calculation.
Worked example
A safety buffer can be added to the estimated reserve without changing tax liability.
Edge cases and assumptions
Tax residency, eligibility dates, exemptions, family circumstances and documentation can change the result. The result card calls out material assumptions and unknown components are not silently changed to zero.
Frequently asked questions
Is this sole trader tax calculator exact?
No. It is a transparent 2026–27 estimate. Your final ATO, payroll or state revenue assessment can include facts not entered here.
Does the calculator store my figures?
No. The deterministic calculation runs in your browser and Taxliva does not require an account.
Which financial year does it use?
It uses 1 July 2026 to 30 June 2027 and rule version AU-2026-27-v1.
Official sources
- Resident individual tax rates for 2026–27 — Australian Parliament / ATO
- 2026 withholding schedules — Medicare levy parameters — Australian Government
- HELP loan repayments 2026–27 — Australian Government Department of Education
- Deductions you can claim — Australian Taxation Office
Rule review
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