Maths Standard Year 11 - Module 3 - Lesson 8

Calculating Income Tax

Use this worksheet after reading the lesson to practise the key ideas and prove you can meet the success criteria.

Name

Date

Class

1. Key Ideas

Apply Australian income tax brackets and the Medicare levy to calculate tax payable, then determine refunds or debts from PAYG withheld.

The 2024–25 Australian income tax brackets and how to read them
Why the marginal rate applies only to income above the bracket threshold

2. Success Criteria

By the end, you should be able to:

The 2024–25 Australian income tax brackets and how to read them
That Medicare levy = 2% of taxable income, added separately
The formulas for tax refund and tax debt

3. Key Terms

Progressive TaxA tax system where higher income earners pay a higher percentage of their income in tax.

Marginal Tax RateThe rate of tax applied to the last dollar earned within a particular tax bracket.

Tax BracketA range of income that is taxed at a particular rate.

Tax PayableThe total amount of income tax owed to the government before offsets.

Tax OffsetA direct reduction in the amount of tax payable, such as the low income tax offset.

4. Activity: Build the Lesson Map

Use the lesson to complete the table. Keep answers brief but specific.

Prompt	Your answer
Main concept
Important example
Common mistake to avoid
How this links to the next lesson

5. Short Answer Questions

1. Explain this lesson goal in your own words: "The 2024–25 Australian income tax brackets and how to read them". Use one specific example from the lesson.

Band 32 marks

2. Apply this idea to a new example: "That Medicare levy = 2% of taxable income, added separately". Show your reasoning clearly.

Band 43 marks

3. Analyse why this idea matters for understanding Calculating Income Tax: "The formulas for tax refund and tax debt".

Band 54 marks

6. Extend: Apply the Idea

Band 5/65 marks

A student gives a memorised answer about Calculating Income Tax but does not use evidence or reasoning.

Improve the answer by writing a stronger response that uses accurate terminology, a relevant example and a clear explanation.

7. Multiple Choice

1. What is the best first step when answering a question about Calculating Income Tax?

A. Identify the key concept being tested

B. Write every fact from memory

C. Ignore the command word

D. Skip examples and evidence

2. Which answer would show stronger understanding of Calculating Income Tax?

A. An answer with accurate terms and reasoning

B. A copied definition only

C. A single-word response

D. An answer with no example

3. What should you do if a question asks you to explain?

A. Link the idea to a reason or cause

B. List unrelated facts

C. Only draw a diagram

D. Write the shortest possible answer

8. Success Criteria Proof

Finish with evidence that you can do each success criterion.

Success criterion 1

Prove that you can: The 2024–25 Australian income tax brackets and how to read them