The Impact of THR and Bonuses on PPh 21 Calculation: Tax Deduction Spikes in the Month of Receipt

For a Permanent Employee, receiving the Religious Holiday Allowance (THR) or annual Bonus is a highly anticipated moment. However, this moment is often followed by the question: "Why did my tax deduction spike so high this month?" The answer lies in the latest Article 21 Income Tax (PPh 21) calculation mechanism which uses the Average Effective Rate (TER).

Since the enactment of Government Regulation Number 58 of 2023, the tax withholding scheme for irregular income such as THR and Bonuses has become administratively simpler, but it has a direct impact on the employee's monthly cash flow.

Concept of Irregular Income

In tax regulations, permanent employee income is divided into two: regular (salary, fixed allowances) and irregular (THR, bonuses, gratuities, production bonuses). Under the old scheme (before 2024), calculating tax on THR involved a rather complex "annualization" process. However, with the TER scheme, the calculation becomes very concise: Gross Income for the Month x TER Rate.

Withholding Mechanism: Income Consolidation

Regulations stipulate that for tax periods other than the last tax period (January–November), PPh 21 withholding is calculated using the Monthly Effective Rate multiplied by the Gross Income for that tax period.

The key point is: Consolidation. Regular income (salary) and irregular income (THR/Bonus) are summed up in one month. There is no separate rate for salary and THR in the monthly calculation. This total sum is matched against the TER table (Category A, B, or C).

Case Example: Mr. A (Receiving THR and Bonus)

Let's break down the case of Mr. A who works at PT Z (Status: Married, No Dependents or K/0).

• Regular Salary & Allowances: Approximately Rp30,000,000 per month.
• PTKP Status: K/0 (Falls into TER A Category).

1. Regular Month (January)

Mr. A receives a gross income of Rp30,080,000. Based on Table TER A, this income is subject to a 13% rate.

Tax: $Rp30,080,000 \times 13\% = Rp3,910,400$

2. Month Receiving THR (July)

In July, Mr. A receives a salary of Rp30,080,000 plus a THR of Rp20,000,000.

• • Total Gross Income for July: $Rp50,080,000$
• • Based on Table TER A, this amount falls into the 18% bracket.
• • July Tax: $Rp50,080,000 \times 18\% = Rp9,014,400$

Note: Due to the combination with THR, Mr. A's tax rate rose from the usual 13% to 18%.

3. Month Receiving Bonus (December)

In December (Last Tax Period), Mr. A receives a Salary of Rp30,080,000 and a large Bonus of Rp60,000,000. Total December Gross is Rp90,080,000. However, specifically for December, TER is NOT used. PT Z must recalculate the full year PPh 21 using the progressive rates of Article 17.

Conclusion

The TER system makes the tax deduction when receiving THR or Bonuses feel larger ("painful upfront") because it is directly multiplied by the effective rate of the high total gross income. However, this large deduction serves as "prepaid tax savings." When recalculating in December (Last Tax Period), the large tax already withheld will serve as a deduction (tax credit), thereby preventing a drastic underpayment at the end of the year.

Regulatory References:

• Law Number 7 of 2021 concerning Harmonization of Tax Regulations (UU HPP).
• Government Regulation Number 58 of 2023 concerning Article 21 Income Tax Withholding Rates on Income in Connection with Work, Services, or Activities of Individual Taxpayers.
• Minister of Finance Regulation Number 168 of 2023 concerning Implementing Guidelines for Withholding Tax on Income in Connection with Work, Services, or Activities of Individual Taxpayers.