Taxable Income and Related Math Topics - KCSE Review
Taxable Income
Taxable Income refers to the portion of your income that is subject to taxation after deductions and
exemptions have been applied.
It can be calculated as:
Gross Income - Deductions = Taxable Income
Example (Worked):
John earns a gross income of KSh 600,000 annually. He contributes KSh 60,000 to his retirement
fund and KSh 20,000 for insurance.
His employer also provides him with KSh 15,000 in benefits. Calculate his taxable income.
Solution:
1. Gross Income = KSh 600,000
2. Deductions:
- Retirement fund: KSh 60,000
- Insurance: KSh 20,000
Total Deductions = KSh 60,000 + KSh 20,000 = KSh 80,000
3. Taxable Income = Gross Income - Deductions = 600,000 - 80,000 = KSh 520,000
Taxable Income Table (Kenya Example):
| Income Range | Tax Rate |
|------------------|----------|
| Up to KSh 288,000| 10% |
| KSh 288,001 to KSh 388,000| 15% |
| KSh 388,001 to KSh 488,000| 20% |
| KSh 488,001 to KSh 588,000| 25% |
| Above KSh 588,000 | 30% |
Example Calculation:
Eunice has a gross annual income of KSh 600,000. She contributes KSh 50,000 to her pension and
KSh 20,000 for insurance.
Calculate her taxable income and the tax she owes.
Solution:
1. Gross income = KSh 600,000
2. Deductions:
- Pension contribution = KSh 50,000
- Insurance = KSh 20,000
Total deductions = KSh 50,000 + KSh 20,000 = KSh 70,000
Taxable Income = KSh 600,000 - KSh 70,000 = KSh 530,000
3. Tax Calculation:
- The first KSh 288,000 taxed at 10% = 28,800
- Next KSh 100,000 taxed at 15% = 15,000
- Next KSh 100,000 taxed at 20% = 20,000
- Remaining KSh 42,000 taxed at 25% = 10,500
Total Tax = 28,800 + 15,000 + 20,000 + 10,500 = KSh 74,300
Your Turn:
Given the same income structure (gross income of KSh 800,000, pension contribution of KSh
70,000, and insurance contribution of KSh 30,000),
calculate the taxable income and tax owed.