Income Tax on Salary How Is It Calculated?

Income tax on salary is an important topic for employees who want to understand how their earnings are taxed. In Indonesia, employment income is generally subject to Article 21 Income Tax or PPh 21, which applies to individual income received in connection with employment, services, or certain activities.

Understanding how this tax is calculated helps employees identify tax deductions on their payslips and understand the difference between gross and net salary. The amount of tax can vary depending on income, tax status, and the applicable withholding mechanism.

WHAT IS INCOME TAX ON SALARY?

Income tax on salary refers to tax imposed on employment-related income received by an individual. Depending on the applicable rules, employment income can include basic salary, allowances, bonuses, incentives, and other payments related to work.

For employees, the employer generally acts as a PPh 21 withholding agent. The employer calculates the applicable tax and withholds it from the employee's income before the salary is paid. The withheld amount is then handled through the employer's tax administration.

HOW PPH 21 IS CALCULATED?

For permanent employees, Indonesia uses the Average Effective Rate or TER for PPh 21 withholding during tax periods other than the final tax period. The applicable rate depends on the employee's gross monthly income and the relevant TER category.

The TER system consists of Categories A, B, and C, which are determined according to the employee's PTKP status. In simple terms, monthly PPh 21 withholding can be calculated by multiplying gross monthly income by the applicable effective rate.

EXAMPLE OF THE CALCULATION

Suppose an employee has TK/0 status and receives gross monthly income of IDR 8,000,000. Under TER Category A, this income falls into a bracket with an effective rate of 1.50 percent.

The calculation is IDR 8,000,000 × 1.50 percent = IDR 120,000. Therefore, the example PPh 21 withholding for that month is IDR 120,000. After this tax deduction alone, the employee would have IDR 7,880,000 before other applicable payroll deductions.

FACTORS AFFECTING SALARY TAX

The amount of income tax can change because gross income is not always the same every month. Bonuses, allowances, incentives, and other taxable employment payments can increase the gross income used in the monthly calculation.

The employee's PTKP status is another important factor. Marital status and qualifying dependents can affect the TER category used for monthly withholding. Employees should also remember that the final tax period uses an annual calculation, so the final month's tax deduction may differ from previous months.

CONCLUSION

Income tax on salary in Indonesia generally involves PPh 21 withheld from employment-related income. For permanent employees, the TER system provides a simpler method for monthly withholding during tax periods other than the final tax period.

Employees should understand gross income, PTKP status, TER, PPh 21, and payslip deductions to better understand their salary tax. Although monthly calculations are simplified, the final tax period still uses an annual calculation to determine the actual tax liability.