Dynamics of PPh 21 for New Employees: Calculating Taxes for Mid-Year Entry

In the dynamic world of employment, recruitment does not always occur at the beginning of the calendar year (January). Many employees start working mid-year, for example in July or September. The change in the Article 21 Income Tax (PPh 21) withholding mechanism with the Average Effective Rate (TER) scheme brings a unique impact to this group of employees, especially regarding the potential for "Overpayment" (Lebih Bayar) at the end of the year.

For employers and employees, understanding the calculation flow from the first month of entry to the Last Tax Period (December) is crucial to maintaining transparency in take-home pay.

Initial Phase: Withholding Using TER (Entry Month to November)

When a permanent employee starts working mid-year (e.g., September), their tax withholding from September to November is carried out using the Monthly Effective Rate (TER) mechanism.

In this phase, the calculation is very simple. The employer multiplies the Gross Income for that month by the percentage rate in the TER table (Category A, B, or C) based on the employee's PTKP status. There is no annualization of income or manual deduction of office costs (biaya jabatan) in this phase.

Final Phase: Adjustment in the Last Tax Period (December)

In December, or the last tax period where the employee is registered, the calculation reverts to Article 17 (Progressive General Rate). This is where the main difference lies. For employees who join mid-year (and whose subjective tax obligation has existed since the beginning of the year), the PPh 21 calculation in December is based on the actual income received during that part of the tax year, without being annualized.

The steps are:

• Calculate the total gross income received during the working period (e.g., September–December).
• Deduct office costs and pension contributions proportional to the working period (maximum office cost is Rp500,000 per month).
• The result (Net Income) is reduced by the full annual Non-Taxable Income (PTKP).
• Calculate the tax payable using the progressive Article 17 rates.
• Compare this annual tax payable with the total tax already withheld via the TER scheme in the previous months.

The Overpayment Phenomenon

Often, employees who start late in the year will experience an Overpayment in December. Why? Because when withheld using TER (Sept-Nov), the rate assumes the employee earns that income for 12 months. However, when recalculated in December (Article 17), the taxable income turns out to be small because the net income is only from 4 months of work, yet it is reduced by the full annual PTKP.

Case Example: Mr. B (Starts in September)

Let's look at an illustration based on the attachment to PMK 168 of 2023. Mr. B starts working at PT Y on September 1, 2024. Status: TK/0. Monthly salary: Rp15,500,000. Pension contribution: Rp100,000/month.

1. Calculation for September – November (Using TER)

Status TK/0 falls into TER Category A. With a salary of Rp15,500,000, the TER is 7%.

• • Monthly PPh 21: $Rp15,500,000 \times 7\% = Rp1,085,000$
• • Total withheld up to November: $Rp1,085,000 \times 3 \text{ months} = Rp3,255,000$

2. Calculation for December (Last Tax Period)

Final realized calculation performed in December:

• • Annual Gross Income (4 months): $Rp15,500,000 \times 4 = Rp62,000,000$
• • Deductions:
  - Office Costs: $5\% \times Rp62,000,000 = Rp3,100,000$ (Capped at $Rp500,000 \times 4 = Rp2,000,000$).
  - Pension Contribution: $Rp100,000 \times 4 = Rp400,000$.
• • Net Income: $Rp62,000,000 - Rp2,000,000 - Rp400,000 = Rp59,600,000$
• • PTKP (TK/0): $Rp54,000,000$ (Deducted fully for the year).
• • Taxable Income (PKP): $Rp59,600,000 - Rp54,000,000 = Rp5,600,000$
• • Tax Payable (Article 17 Rate): $5\% \times Rp5,600,000 = Rp280,000$

3. Final Status in December

Conclusion

In the case of employees starting mid-year, the TER scheme often results in "too high" withholding in the early months compared to the actual tax liability at the end of the year. According to regulations, this PPh 21 overpayment must be refunded by the employer to the employee no later than the end of the month following the last tax period.

Regulatory References:

• Government Regulation Number 58 of 2023 concerning Article 21 Income Tax Withholding Rates.
• Minister of Finance Regulation Number 168 of 2023 concerning Implementing Guidelines.
• Attachment to PMK 168 of 2023 (Part Two, Number I.2.1.1).
• Book "Cermat Pemotongan PPh Pasal 21/26" (Directorate General of Taxes, 2024).