About the Company Tax Calculator
A Company Tax Calculator Australia helps businesses estimate their corporate income tax liability for the current financial year. Understanding your company tax obligations is essential for cash flow forecasting, dividend planning, and meeting ATO payment schedules. Australian companies pay tax on their taxable income at either the base rate (25%) for base rate entities or the corporate rate (30%) for all other companies. Determining which rate applies depends on your aggregated turnover and the proportion of your income that is passive. Using a reliable company tax calculator ensures you set aside the right amount for tax and avoid unexpected bills at lodgement time.
What is the Company Tax Calculator?
The Company Tax Calculator is a financial tool that estimates the income tax payable by an Australian company based on its estimated taxable income, applicable tax rate, and available offsets and credits. The Australian corporate tax system uses a two-tier rate structure. For the 2025-26 income year, a base rate entity (with aggregated turnover below $50 million and no more than 80% passive income) pays tax at 25%. Companies that do not meet the base rate entity criteria pay tax at 30%. The calculator accounts for key variables including estimated taxable income, franking credits on dividends received, research and development tax offsets, and Pay As You Go (PAYG) instalments already paid during the year. It also considers the lower company tax rate for small and medium businesses, the small business income tax offset (for unincorporated entities), and the ability to carry forward prior year losses. Taxable income is calculated after deducting all allowable business expenses including salaries, rent, marketing, depreciation, interest, and superannuation contributions. The calculator provides both the estimated tax payable and the effective tax rate as a percentage of taxable income.
How to Use This Calculator
- 1Enter your estimated taxable income: Input the company's expected taxable income for the financial year after all allowable deductions.
- 2Select your company type: Choose between base rate entity (turnover under $50 million, less than 80% passive income) or other company (30% rate).
- 3Enter any prior year losses: If your company has carried-forward tax losses from previous years, enter the amount to reduce current-year taxable income.
- 4Add research and development tax offset: If eligible, enter your R&D expenditure. The calculator applies the appropriate refundable or non-refundable offset.
- 5Enter PAYG instalments already paid: Input any quarterly or annual PAYG instalments paid to the ATO during the year.
- 6Include franking credits: If your company received franked dividends, enter the franking credits to be included in assessable income.
- 7Click Calculate: The tool shows your estimated tax payable, the balance due after PAYG credits, and your effective tax rate.
Worked Australian Example
Practical Example
Consider Melborne-based digital agency, Yarra Digital Solutions Pty Ltd, operating in Victoria. For the 2025-26 financial year, the company has estimated total income of $2,800,000 and allowable deductions of $1,950,000, giving a taxable income of $850,000. Yarra Digital has an aggregated turnover of $2.8 million and earns less than 80% passive income, qualifying as a base rate entity. Using the Company Tax Calculator, the director Priya enters the taxable income of $850,000 and selects base rate entity. The calculator applies the 25% rate, giving a gross tax of $212,500. The company has paid quarterly PAYG instalments totalling $180,000 during the year, and has $15,000 in franking credits from dividends received. The calculator shows a net tax payable of $17,500 ($212,500 − $180,000 − $15,000). Priya also checks a scenario where turnover exceeds $50 million — the calculator shows the rate would switch to 30%, resulting in gross tax of $255,000 and a net payable of $60,000. This exercise helps Priya understand the financial impact of rapid growth and plan for the tax implications of scaling the business. She also reviews the company's franking account balance and decides to declare a fully franked dividend to shareholders.
Common Company Tax Calculator Questions
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Use Calculator →Reviewed by
BizMetrixs Team
Australian Financial Specialists