Income Tax: Core Concepts, Traps, and a Worked Example
The building blocks
Start with the charge itself: who is taxed, on what, and for which income year. A candidate must be fluent in the distinction between resident and non-resident treatment, because residence status drives the scope of taxable income (worldwide versus source-limited). Know the heads or schedules of income, the difference between revenue receipts and capital receipts, and the treatment of exempt income and allowable deductions. Understand how taxable income is computed: gross income, less exempt amounts, less allowable deductions, less reliefs or credits, then applied against progressive or flat rates.
Traps that recur in questions
- Residence versus citizenship: they are not the same test. Read the fact pattern for days present, permanent home, and habitual abode.
- Capital versus revenue: a one-off gain is not automatically capital; look at intention, holding period, and the nature of the asset.
- Gross versus net: questions often give a gross figure and ask for tax payable, requiring deduction of withholding already suffered.
- Timing: accrual versus cash basis, and the cut-off at year end.
- Credits versus deductions: a deduction reduces taxable income; a credit reduces tax payable. Mixing them is the most common arithmetic error.
Worked example
Assume a resident individual with employment income of 600,000, allowable deductions of 100,000, personal relief of 50,000, and withholding tax already paid of 20,000. Taxable income = 600,000 − 100,000 − 50,000 = 450,000. If the applicable rate is 20 percent, tax before credit = 90,000. Tax payable = 90,000 − 20,000 = 70,000. Note the order: deductions and reliefs shape the base; credits come off the liability last.
Rule of thumb
Always write the computation as a ladder - gross, exempt, deductions, reliefs, base, rate, credits, payable. Most marks are lost by skipping a rung, not by misunderstanding the law.