Under Philippine tax law, an employee who resigns or is terminated before December 31 may be entitled to a refund of overwithheld income tax on compensation. Monthly withholding taxes are computed by employers using the BIR’s cumulative or annualized tables (Revenue Regulations No. 2-98, as amended), which assume the employee will work the full calendar year. When actual employment ends earlier, the total tax withheld often exceeds the correct annual tax liability computed on the actual taxable compensation earned. The excess constitutes an overpayment that the employee may recover from the Bureau of Internal Revenue (BIR).

Legal Framework

The obligation to withhold is mandated by Section 79 of the National Internal Revenue Code of 1997 (NIRC), as amended by Republic Act No. 10963 (TRAIN Law). The graduated income tax rates applicable to compensation income are:

₱0 – ₱250,000: 0%
₱250,001 – ₱400,000: 15% of excess over ₱250,000
₱400,001 – ₱800,000: ₱30,000 + 20% of excess over ₱400,000
₱800,001 – ₱2,000,000: ₱110,000 + 25% of excess over ₱800,000
₱2,000,001 – ₱8,000,000: ₱470,000 + 30% of excess over ₱2,000,000
Over ₱8,000,000: ₱2,210,000 + 35% of excess over ₱8,000,000

Section 229 of the NIRC grants the right to claim refund of any overpaid tax within two (2) years from the date the tax was paid (i.e., the date of withholding). Substituted filing under Revenue Regulations No. 2-98 does not apply when a refund is sought; the employee must file a formal return.

Tax Treatment of Separation Pay and Other Benefits

Separation pay is either taxable or exempt depending on the cause of separation:

Exempt under Section 32(B)(6) of the NIRC: amounts received on account of death, sickness or other physical disability, or for any cause beyond the employee’s control (e.g., redundancy, retrenchment, installation of labor-saving devices, or cessation of business). These are not included in taxable compensation and are not subject to withholding.
Taxable: voluntary resignation or separation for causes within the employee’s control. The full amount is added to taxable compensation and withheld at the applicable graduated rate.

Other exclusions from taxable compensation include:

13th-month pay and other benefits up to ₱90,000 per year
De minimis benefits (uniforms, rice subsidy, medical allowance, etc., within prescribed limits)
Employee’s share in SSS, PhilHealth, Pag-IBIG, and union dues
Hazard pay, overtime pay that forms part of basic salary in certain cases, and other non-taxable items listed in RR 2-98.

Step-by-Step Computation of the Refundable Amount

Gather all compensation documents: final payslip, separation pay voucher (if any), and Certificate of Compensation Payment and Tax Withheld (BIR Form No. 2316) issued by the employer.
Compute Total Taxable Compensation Income for the Year:
- Add all taxable salaries, allowances, bonuses, and taxable separation pay actually received from January 1 to the date of separation.
- Add taxable compensation from any previous employer(s) in the same calendar year.
- Subtract only the exclusions enumerated above (13th-month cap, de minimis, mandatory contributions).
- Result = Gross Taxable Compensation (GTC).
Determine the Correct Annual Income Tax Due:
Apply the graduated rates directly to the GTC. No personal or additional exemptions apply after the TRAIN Law. If the employee has other income (business, profession, or capital gains), combine all taxable income and deduct either itemized deductions or the 40% Optional Standard Deduction (OSD) where allowable under Section 34. For pure compensation earners, deductions are usually limited to the mandatory contributions already subtracted above.
Obtain Total Tax Actually Withheld:
This figure appears on the BIR Form 2316 (Box 18 or equivalent) and represents the cumulative withholding from all payroll periods plus any final withholding on the last paycheck.
Calculate the Refund:
Refund = Total Tax Withheld − Correct Annual Income Tax Due
If the result is positive, that amount is refundable. If negative, additional tax is payable.

Example
An employee earning ₱30,000 monthly resigns on June 30 after receiving ₱180,000 basic pay + ₱15,000 taxable allowance + ₱20,000 taxable separation pay. Total GTC = ₱215,000.
Tax due: ₱0 (entirely within the ₱250,000 bracket).
Total withheld by employer: ₱18,000 (monthly withholdings based on annualized projection).
Refund = ₱18,000 − ₱0 = ₱18,000.

Procedure to Claim the Refund

Secure BIR Form 2316 from the former employer. The employer must issue it within thirty (30) days from the date of separation or, at the latest, by January 31 of the following year.
Prepare BIR Form 1701 (Annual Income Tax Return for Individuals). Use the latest version available from the BIR website or eBIRForms system. Indicate the refund claim in Item 26 (Tax Refund/Overpayment).
Attach mandatory supporting documents:
- Original or certified true copy of BIR Form 2316
- Final payslip and separation voucher
- Proof of other income or previous 2316 (if multiple employers)
- Valid government-issued ID
File the return:
- Electronically through the BIR eBIRForms portal (preferred) or
- Manually at the Revenue District Office (RDO) where the employee is registered as a taxpayer.
  Deadline: On or before April 15 of the year following the taxable year of separation.
Choose refund mode on the return:
- Cash refund (via BIR-issued check or bank credit)
- Tax credit certificate (TCC) to be applied against future tax liabilities
Processing:
The BIR must act on the claim within the period prescribed by law. Once approved, the refund is released through the Revenue Collection Officer or the authorized bank. The two-year prescriptive period under Section 229 runs from the date the tax was withheld; filing the 1701 within the April 15 deadline preserves the right.

Special Situations

Multiple employers in the same year: Substituted filing is unavailable. File one consolidated 1701 showing all 2316 forms and claim the net refund.
New employment after separation: The new employer withholds based on the remaining months using the cumulative method starting from zero. The refund from the previous employer is claimed separately on the same 1701.
Death of employee: Heirs file the return and claim the refund using the deceased’s TIN; separation benefits remain exempt if due to death.
Retirement benefits under a qualified plan: If the plan meets BIR requirements (RR 2-98 and RA 7641), lump-sum retirement pay is exempt. Otherwise, it is taxable and included in the computation.
Overseas Filipino Workers (OFWs): Only Philippine-sourced compensation is taxable; foreign-sourced income is exempt. Refund procedure remains the same for any Philippine withholding.

Common Pitfalls and Compliance Notes

Failing to file Form 1701 when a refund is due forfeits the right because substituted filing does not generate a refund mechanism. Late filing beyond April 15 (or the two-year period) bars recovery. Employers are prohibited from directly refunding withheld taxes; all remittances to the BIR are final. Any underwithholding discovered during audit may result in additional assessment plus interest and penalties (25% surcharge, 12% interest per annum, and compromise penalties).

Employees are advised to retain copies of all payroll documents for at least five years in case of BIR audit. Accurate computation using the graduated rates and proper attachment of the 2316 are the keys to a successful refund claim. The process ensures that the Philippine tax system collects only the correct amount of income tax on actual earnings received.