Company Tax Calculator Australia

What the Company Tax Calculator Does

The company tax calculator works out the flat company tax on a company's profit and shows the after-tax profit. Australian companies are taxed at a flat rate that depends on whether they qualify as a base rate entity or are taxed as a standard company. This tool applies the correct rate to your profit so you can see the tax and what remains for the business or its shareholders.

For business owners, directors, and advisers, knowing the company tax on a given profit is essential for planning distributions, reinvestment, and cash flow. The calculator turns that into a quick, clear figure.

How Company Tax Works in Australia

Company tax in Australia is fundamentally different from individual income tax. Individuals pay progressive rates that rise across income brackets. Companies pay a single flat rate on their taxable profit, regardless of how large or small that profit is.

The only variable is which rate applies:

• Base rate entities are taxed at a lower company tax rate
• Standard companies are taxed at the higher standard rate

Selecting the right category is therefore the key decision when estimating the tax.

Base Rate Entity vs Standard Company

Whether a company qualifies as a base rate entity depends on two broad conditions: its aggregated turnover must be below a threshold, and most of its income must come from active business rather than passive sources such as rent or interest.

Companies that meet both conditions access the lower rate. Those that do not are taxed at the standard rate. This distinction matters because it directly changes the tax on the same profit. The calculator lets you select the entity type so the correct rate is applied.

The passive income condition is worth emphasising, because it catches some businesses by surprise. A company can be small enough to fall under the turnover threshold yet still be taxed at the standard rate if too much of its income comes from passive sources such as rent, interest, dividends, or net capital gains. The rules are designed to direct the lower rate toward active, trading businesses rather than passive investment vehicles. If your company earns a mix of active and passive income, the classification can be less obvious than turnover alone suggests, and it is worth confirming with an adviser.

How to Use the Calculator

To estimate your company tax, provide two inputs:

1. Enter your company's taxable profit.
2. Select whether it is a base rate entity or a standard company.

The tool multiplies the profit by the applicable rate and shows both the tax payable and the after-tax profit that remains.

Because the rate is flat, the calculation itself is simple, but the value lies in seeing the numbers clearly and consistently. Running your expected profit through the tool at different points in the year helps you anticipate the tax bill rather than being surprised by it. It is a quick way to sanity-check the figures your accounting software produces and to keep the after-tax result front of mind when you plan spending or distributions.

Taxable Profit vs Accounting Profit

A common source of error is using accounting profit instead of taxable profit. The two are related but not identical. Taxable profit is your assessable income less allowable deductions under tax law, and tax rules treat some items differently from accounting standards.

For example, certain expenses may be deductible for tax at a different time or amount than they appear in your accounts. For the most accurate estimate, use your taxable profit figure. If you only have accounting profit, treat the result as approximate.

Why the After-Tax Figure Matters

The after-tax profit is more than a formality. It represents what the company actually keeps, which can be:

• Reinvested into the business for growth
• Retained as a buffer for future needs
• Distributed to shareholders as dividends

Because dividends paid from taxed profits generally carry franking credits, the company tax paid is not lost to shareholders but flows through the imputation system. Under this system, tax paid at the company level can be credited to shareholders when profits are distributed, which is designed to avoid the same profit being taxed twice. This calculator focuses on the company-level tax, which is the starting point for those later decisions about how and when to distribute.

Planning With the Calculator

Business owners can use the tool for several practical purposes:

• Cash flow planning. Knowing the tax on expected profit helps set aside the right amount.
• Comparing scenarios. Test how different profit levels change the tax and after-tax result.
• Understanding entity choice. See how the base rate and standard rates differ on the same profit.

Seeing these numbers before year end supports better decisions about spending, investment, and distributions.

Reading Your Result

Treat the output as an estimate for planning. The rates the calculator applies are kept current, but your company's actual liability depends on its full tax position, including any offsets, losses, and the correct classification of its income.

Use it to model different profit and entity scenarios, then confirm the figures with a registered tax agent or the relevant tax authority before making decisions. Company tax interacts with franking, distributions, and other rules that sit beyond a single flat calculation, so professional advice is worthwhile for anything significant.

This article is general information only and is not financial advice.

About This Tool: Company Tax Calculator Australia

Company tax calculator Australia: use this tool to get an instant, accurate estimate. The figures follow official ATO guidance and every rate and threshold is kept up to date for 2026. Adjust the inputs above to match your situation, or browse all our calculators to plan your next step.