What a day rate has to cover
Divide a $100,000 salary by 260 weekdays and you get $385 a day — but no contractor should ever accept that rate. An employee's salary comes wrapped in things a contractor must self-fund: 12% super, four weeks of paid leave, ten-plus public holidays, sick days, insurance, equipment, an accountant, and the bench time between contracts when nobody is paying at all. The calculator makes each of these a visible line instead of a vibe.
Billable days drive everything. The difference between 240 and 200 billable days is nearly 20% of gross income, which is why the same day rate can feel lucrative one year and thin the next. Set the days honestly — including a realistic allowance for gaps — and the comparison changes materially.
Tax works the same, structure rarely helps. Under the ATO's personal services income rules, income earned mainly from your personal skills is taxed at your individual marginal rates even if it flows through a company. The genuine tax lever contractors do control is deductible super contributions — money moved from your marginal rate (often 30–37%) to the 15% contributions rate. The calculator treats your self-funded super percentage exactly that way, and counts it in the total-value comparison so contracting isn't flattered by simply skipping retirement savings.
The break-even day rate answers the negotiating question directly: given your billable days, expenses and super rate, what daily rate delivers the same total value as the salary on the table? Anything above it is compensation for the risk, insecurity and missing protections of contracting — decide what that premium is worth to you.
Figures assume individual PSI taxation with the selected year's ATO rates, exclude GST, and don't model payroll tax, workers' compensation or state nuances. General information only — not tax or financial advice.