Form 5 · Chapter 4

Consumer Mathematics: Taxation

Taxable income, tax reliefs and computing income tax for SPM Mathematics Form 5 — with a worked example and an interactive exercise.

Consumer Mathematics: Taxation is about income tax — how much of your earnings goes to the government to fund public services.

1. Taxable income

Taxable income

$\text{Taxable income} = \text{Gross income} - \text{Total tax reliefs}$

Tax reliefs (personal relief, EPF, lifestyle, etc.) reduce the income that is taxed.

2. Calculating the tax

Income tax is charged in bands: higher slices of income are taxed at higher rates. After finding the tax due, any tax rebate is subtracted to give the amount payable.

Worked example

A person's gross annual income is $\text{RM}40{,}000$ and total reliefs are $\text{RM}9{,}000$. Find the taxable income.

Taxable income $= 40{,}000 - 9{,}000 = \text{RM}31{,}000$.

Exam tips

  • Subtract reliefs from gross income first to get taxable income.
  • Tax is charged in bands — only the income in each band is taxed at that band's rate.
  • A tax rebate is subtracted from the tax due; a relief is subtracted from income.

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