Personal income tax, usually called PIT, is one of the most important tax items for employees and foreign residents working in Vietnam. It affects monthly payroll, year-end tax finalization, dependent deductions, tax residency, and even exit procedures when a foreign employee leaves Vietnam.
For companies, PIT filing is not only a tax calculation issue. It is also connected to employment contracts, work permits, payroll records, bank payments, social insurance, and documentation for tax inspection.
Who Must Pay Personal Income Tax in Vietnam?
Vietnam personal income tax applies to individuals who earn taxable income in Vietnam. For foreign employees, the most common taxable income is salary and wage income from employment.
The tax treatment differs depending on whether the individual is considered a tax resident or non-resident in Vietnam. This is one of the first points to confirm before calculating PIT.
Before calculating PIT, first check whether the employee is a resident taxpayer or non-resident taxpayer. The tax method can be very different.
Resident vs Non-Resident Taxpayer
2026 PIT Context: New Law and Filing Awareness
Vietnam’s new Personal Income Tax Law No. 109/2025/QH15 is scheduled to take effect from July 1, 2026. Legal updates describe it as a major reform that replaces the previous PIT law framework and changes the PIT landscape for employees, employers, and globally mobile workers.
For payroll teams, this means 2026 is a transition year. Companies should review monthly withholding, annual finalization, dependent registration, salary allowances, insurance deductions, and employee communication before the new rules fully apply.
✔ The 2025 PIT Law takes effect from July 1, 2026
✔ Provisions on salary and wage income of residents apply from the 2026 tax period
✔ Payroll teams should review withholding and finalization procedures
✔ Foreign employees should check tax residency and departure finalization requirements
How PIT Filing Usually Works
1. Monthly withholding
For employees, PIT is usually withheld through monthly payroll by the employer.
2. Tax code registration
Employees need a personal tax code for proper filing, dependent registration, and finalization.
3. Dependent registration
If applicable, dependent deductions should be registered with supporting documents.
4. Annual finalization
At year-end, PIT is finalized based on actual annual income, deductions, tax withheld, and any additional tax payable or refund position.
5. Departure finalization for foreigners
Foreign employees leaving Vietnam may need to finalize tax before departure or authorize another party to complete it within the required timeline.
Documents Commonly Needed for PIT Finalization
Filing Deadlines: Employer vs Individual
In Vietnam, PIT finalization deadlines differ depending on who files the finalization. Employer-side annual PIT finalization and individual direct finalization are handled on different deadlines.
Common PIT Filing Mistakes
✔ Arrival date and departure date are not documented
✔ Employee has income from more than one employer but does not finalize directly
✔ Dependent deduction is applied without proper registration
✔ Tax withholding certificate is missing
✔ Housing, relocation, school fee, bonus, or allowance is treated incorrectly
✔ Foreign employee leaves Vietnam without checking finalization obligation
Practical Checklist for Foreign Employees
1. Check your tax residency early
Your tax method depends heavily on residency status. Keep travel records, visa dates, and entry/exit history.
2. Ask HR for your monthly PIT withholding record
Do not wait until year-end. Monthly withholding should be visible on payslips or payroll summaries.
3. Register dependents properly
Dependent deductions usually require supporting documents and proper registration.
4. Keep income certificates from all employers
If you changed jobs or received income from multiple companies, you may need direct finalization.
5. Check finalization before leaving Vietnam
Foreign employees ending their assignment should check PIT finalization before departure.
6. Keep copies of all filings and receipts
Save tax declarations, withholding certificates, payment receipts, and refund records for future reference.
Practical Checklist for Employers
✔ Keep labor contract, salary records, and bank payment evidence aligned
✔ Review taxable and non-taxable allowances
✔ Collect dependent documents before applying deductions
✔ Issue tax withholding certificates when needed
✔ Track foreign employee arrival, departure, and assignment dates
✔ Reconcile payroll, PIT declaration, and accounting records before year-end
When Should You File Directly?
An employee may need to file directly with the tax authority if they have income from multiple sources, changed employers during the year, have additional tax payable or refund claims, or are not authorized for employer-side finalization.
Foreigners leaving Vietnam should also check whether departure finalization is required. In practice, HR or a tax advisor should review the case before the employee’s final working day.
If you changed jobs, had multiple income sources, or are leaving Vietnam, do not assume the employer’s annual filing covers everything. Ask HR or a tax advisor to confirm.
Reference Links and Extracts
· LuatVietnam — English translation of the 2025 Law on Personal Income Tax is newly published
· LuatVietnam — Law on Personal Income Tax 2025, No. 109/2025/QH15
· PwC Tax Summaries — Vietnam - Individual - Tax administration
· Vietnam Briefing — Vietnam Personal Income Tax
· Acclime Vietnam — Personal Income Tax in Vietnam: Quick guide
· KPMG — Vietnam: Personal income tax law materially changes tax landscape for globally mobile employees
✔ LuatVietnam states that the 2025 PIT Law takes effect from July 1, 2026
✔ LuatVietnam notes that salary and wage provisions for residents apply from the 2026 tax period
✔ PwC summarizes PIT finalization deadlines for employers and individuals
✔ Vietnam Briefing explains tax residency, income categories, and PIT treatment in Vietnam
✔ Acclime Vietnam summarizes payroll-related PIT and compulsory insurance deduction points
✔ KPMG highlights the impact of the new PIT law on globally mobile employees and employers
Final Note
Vietnam personal income tax filing can look simple when salary is paid by one employer only. But for foreign employees, job changes, assignment endings, multiple income sources, and departure from Vietnam can make finalization more complex.
The safest approach is to check tax residency early, keep payroll records, confirm monthly withholding, and review annual finalization before the deadline or before leaving Vietnam.