Assessable vs. Taxable Income & Tax Computation: Calculation, Adjustments & Compliance

TAKEAWAYS

• Assessable income includes all income sources (salary, business, capital gains, etc.) before deductions, while taxable income is assessable income minus allowable deductions and exemptions.
• Tax computation follows a structured formula: Taxable Income × Tax Rate – Tax Credits = Tax Payable, with progressive rates for individuals and flat rates for businesses.
• Adjustments (e.g., depreciation, standard deduction, TDS) directly impact taxable income and must be accurately recorded in ledgers and tax returns.
• VAT and indirect taxes interact with assessable income (e.g., input VAT reduces cost, output VAT increases revenue), requiring careful reconciliation.
• Real-world applications: Banks (loan interest deductions), eSewa/Khalti (transaction fees as assessable income), and NEPSE (dividend tax adjustments).
• Exam focus: Numerical problems (e.g., computing tax for a Kathmandu retailer), definitions (assessable vs. taxable income), and scenario-based adjustments (e.g., TDS on dividends).

1. Definitions: Assessable Income vs. Taxable Income

Understand the legal distinction under the Income Tax Act 2058 (amended 2076):

classDiagram
    class AssessableIncome {
        +All income sources (salary, business, capital gains, rent, dividends, interest, royalties, natural resources)
        +Includes gross amounts **before** deductions
        +Examples: Salary (Rs. 500,000), Business profit (Rs. 200,000), Dividend (Rs. 25,000)
    }
    class TaxableIncome {
        +Assessable Income **minus** allowable deductions/exemptions
        +Examples: Salary (Rs. 500,000 – Rs. 50,000 standard deduction = Rs. 450,000)
    }
    AssessableIncome --> TaxableIncome : "Taxable Income = Assessable Income - Deductions"

Key Differences

2. Components of Assessable Income

Assessable income is broadly classified into five heads under Nepal’s tax law:

mindmap
  root((Assessable Income))
    Income from Salaries
    Income from House Property
    Income from Business/Profession
    Income from Capital Gains
    Income from Other Sources (Dividends, Interest, Royalties, Natural Resources)

Real-World Example: eSewa’s Assessable Income

• Source: Transaction fees (e.g., Rs. 10 per online payment).
• Assessable Income: Gross fees collected (e.g., Rs. 50,00,000 in a year).
• Taxable Income: Rs. 50,00,000 minus allowable deductions (e.g., Rs. 5,00,000 for operational expenses = Rs. 45,00,000).

3. Allowable Deductions to Compute Taxable Income

Deductions reduce taxable income and are categorized as:

1. Standard Deduction: Fixed amount (e.g., Rs. 50,000 for individuals).
2. Professional Deductions: Business expenses (salaries, rent, depreciation).
3. House Rent Allowance (HRA): Up to 15% of salary (for salaried individuals).
4. Tax-Deducted at Source (TDS): Already deducted amounts (e.g., dividend TDS).
5. Depreciation: Written Down Value (WDV) method (covered in Unit 7).

Visual: T-Account for Deductions

4. Tax Computation Process

The tax computation formula is:

Tax Payable = (Taxable Income × Applicable Tax Rate) – Tax Credits

Tax Slabs for Individuals (FY 2079/80)

Example: Tax Computation for a Kathmandu Retailer (Mr. Bikram)

Assessable Income:

• Business profit: Rs. 15,00,000
• Rent income: Rs. 5,00,000
• Total Assessable Income = Rs. 20,00,000

Allowable Deductions:

• Standard deduction: Rs. 50,000
• Depreciation (WDV): Rs. 2,00,000
• Total Deductions = Rs. 2,50,000

Taxable Income:

Rs. 20,00,000 (Assessable) – Rs. 2,50,000 (Deductions) = Rs. 17,50,000

Tax Calculation:

- First Rs. 8,00,000: 10% of (8,00,000 – 4,00,000) = Rs. 40,000
- Next Rs. 9,50,000 (17,50,000 – 8,00,000): 20% of 9,50,000 = Rs. 1,90,000
- **Total Tax = Rs. 40,000 + Rs. 1,90,000 = Rs. 2,30,000**

5. Interaction with VAT and Indirect Taxes

VAT affects assessable income in two ways:

1. Input VAT: Reduces the cost of goods sold (increases taxable income).
2. Output VAT: Increases revenue (part of assessable income).

Example: Daraz Seller’s VAT Impact

• Cost of goods (excluding VAT): Rs. 10,000
• Input VAT (13%): Rs. 1,300 (paid to supplier)
• Selling price (excluding VAT): Rs. 15,000
• Output VAT (13%): Rs. 1,950 (collected from customer)

Assessable Income Calculation:

Gross Revenue (including VAT) = Rs. 15,000 + Rs. 1,950 = Rs. 16,950
Less: Cost of Goods (Rs. 10,000 + Rs. 1,300 VAT) = Rs. 11,300
**Taxable Income = Rs. 5,650**

VAT Payable to Government:

Output VAT (Rs. 1,950) – Input VAT (Rs. 1,300) = Rs. 650 (paid to IRD)

6. Worked Example: Ncell’s Dividend Tax Adjustment

Scenario: Ncell declares a dividend of Rs. 10,00,000 to shareholders. TDS is deducted at 10% (as per Section 80A of Income Tax Act).

Assessable Income for Shareholder:

• Gross Dividend Received: Rs. 10,00,000
• TDS Deducted: Rs. 1,00,000 (already paid to IRD)

Taxable Income:

Assessable Income (Dividend) = Rs. 10,00,000
Less: TDS (already deducted) = Rs. 1,00,000
**Net Taxable Income = Rs. 9,00,000**

Tax Computation:

• Tax Rate: 20% (for income above Rs. 8,00,000)
• Tax on Rs. 9,00,000:
  • First Rs. 8,00,000: 10% of (8,00,000 – 4,00,000) = Rs. 40,000
  • Remaining Rs. 1,00,000: 20% of 1,00,000 = Rs. 20,000
  • Total Tax = Rs. 60,000
• Refundable TDS: Rs. 1,00,000 – Rs. 60,000 = Rs. 40,000 (claimed as credit in ITR).

7. Common Adjustments in Tax Computation

8. The Accounting Cycle for Tax Computation

flowchart TD
    A["Record Transactions in Journal"] --> B["Post to Ledger Accounts"]
    B --> C["Prepare Trial Balance"]
    C --> D["Adjust for Depreciation, Prepaid Expenses, Accruals"]
    D --> E["Compute Assessable Income"]
    E --> F["Apply Deductions to Get Taxable Income"]
    F --> G["Compute Tax Using Slab Rates"]
    G --> H["File ITR with IRD"]
    H --> I["Pay Tax or Claim Refund"]

9. Real-World Applications

Example 1: NEPSE Stock Investor

• Assessable Income: Capital gains from stock sales (e.g., Rs. 2,00,000).
• Deduction: Cost of acquisition (Rs. 1,50,000).
• Taxable Income: Rs. 50,000.
• Tax: 10% of Rs. 50,000 = Rs. 5,000.

Example 2: Khalti’s Transaction Fees

• Assessable Income: Rs. 2,00,00,000 (gross fees).
• Deductions:
  • Operational expenses: Rs. 1,50,00,000
  • Depreciation: Rs. 10,00,000
• Taxable Income: Rs. 40,00,000.
• Tax: Progressive rate (e.g., 20% on Rs. 40,00,000 = Rs. 8,00,000).

Example 3: Bank Loan Interest Deduction

• Assessable Income: Salary Rs. 8,00,000.
• Deduction: Home loan interest (Rs. 2,00,000).
• Taxable Income: Rs. 6,00,000.
• Tax: 10% of (6,00,000 – 4,00,000) = Rs. 20,000.

10. Common Pitfalls in Tax Computation

1. Ignoring TDS: Forgetting to subtract TDS from assessable income.
2. Incorrect Depreciation: Using straight-line instead of WDV method.
3. Overlooking Exemptions: Not claiming standard deductions or HRA.
4. VAT Miscalculation: Treating input VAT as an expense (it’s recoverable).
5. Mismatched Assessment Year: Confusing income year (e.g., 2079/80) with assessment year (2080/81).

11. Exam Tip: How to Score Full Marks

1. Definitions:

   • Clearly differentiate assessable income (gross) vs. taxable income (net).
   • Example answer:

     "Assessable income is the total income from all sources before any deductions, while taxable income is the amount on which tax is actually computed after subtracting allowable deductions as per Schedule 2 of the Income Tax Act 2058."

2. Numerical Problems:

   • Step-by-step approach:
     1. List all income sources (salary, business, capital gains, etc.).
     2. Subtract all allowable deductions (depreciation, standard deduction, TDS).
     3. Apply tax slab rates progressively.
     4. Reconcile VAT if involved (input vs. output).
   • Example structure:

     Assessable Income:
     - Salary: Rs. 5,00,000
     - Business Profit: Rs. 3,00,000
     Total: Rs. 8,00,000
     
     Less: Deductions:
     - Standard Deduction: Rs. 50,000
     - Depreciation: Rs. 2,00,000
     Total Deductions: Rs. 2,50,000
     
     Taxable Income: Rs. 5,50,000
     Tax Computation:
     - First Rs. 4,00,000: 0%
     - Next Rs. 1,50,000: 10% → Rs. 15,000
     Final Tax Payable: Rs. 15,000
     

3. VAT Integration:

   • Always show separate columns for input VAT and output VAT.
   • Example:

     | Particulars          | Amount (Rs.) |
     |----------------------|--------------|
     | Output VAT Collected | 1,95,000     |
     | Input VAT Paid       | 1,30,000     |
     | **VAT Payable**      | **65,000**   |
     

4. Real-World Scenarios:

   • Tie answers to Nepali businesses (e.g., a Kathmandu hotel’s rent income deduction or a Daraz seller’s VAT reconciliation).
   • Example prompt:

     "Mr. Ram of a Kathmandu restaurant has assessable income of Rs. 12,00,000. He incurred Rs. 3,00,000 in business expenses and Rs. 2,00,000 in depreciation. Compute his taxable income and tax payable."

5. Avoid Common Mistakes:

   • Don’t forget TDS: Always subtract TDS from gross income.
   • Use correct slab rates: Memorize the progressive rates for individuals and flat rates for companies (25%).
   • Show all steps: Examiners reward logical flow (e.g., income → deductions → taxable income → tax computation).

12. Practice Questions for Self-Assessment

1. Short Answer:

   • Differentiate between assessable income and taxable income with an example of a salary earner.
   • What is the role of TDS in tax computation?

2. Numerical:

   • Mr. Hari’s assessable income for FY 2079/80:
     • Salary: Rs. 7,00,000
     • Business profit: Rs. 4,00,000
     • Dividend (after TDS of 10%): Rs. 20,000
     • Deductions: Depreciation Rs. 1,50,000, Standard deduction Rs. 50,000. Compute his taxable income and tax payable.

3. VAT Scenario:

   • An importer buys goods for Rs. 5,00,000 (excluding VAT). VAT rate is 13%. He sells to a retailer for Rs. 7,00,000 (excluding VAT). Compute:
     • Assessable income for the importer.
     • VAT payable by the importer.
     • Retailer’s assessable income (assuming 10% margin on cost).

13. Quick Revision Table

14. Final Checklist Before Exam

• Can you define assessable vs. taxable income?
• Can you compute tax for a given scenario (salary + business income)?
• Do you know how VAT affects assessable income?
• Can you reconcile TDS in tax computation?
• Are you familiar with WDV depreciation adjustments?