Vietnam’s amended Personal Income Tax Law (Law No. 109/2025/QH15), passed December 10, 2025, represents the most significant PIT restructuring since 2012. The progressive schedule reduces from 7 brackets to 5. The top 35% rate threshold rises from VND 80 million to VND 100 million per month. Personal deductions increase by 41%.
Two implementation dates apply. Salary and wage provisions for tax resident individuals take effect from January 1, 2026. The full law takes effect July 1, 2026. This staggered structure creates a compliance risk that most payroll teams have not yet resolved.
Tax Residency: The Foundational Decision That Determines Everything
The 183-Day Rule and What It Means in Practice
A tax resident is an individual who stays in Vietnam for 183 days or more in either the calendar year or any 12-consecutive-month period from the date of first arrival. Continuous stay is not required, days are counted cumulatively. An individual holding a Vietnamese temporary residence card, lease agreement, or permanent registered address may also qualify as a tax resident even without meeting the 183-day threshold.
Tax residents pay progressive PIT rates on worldwide income, regardless of where income is paid or received. A tax resident receiving salary from a UK employer into a London bank account for work performed in Vietnam is still subject to Vietnamese PIT on that income.
Non-residents pay a flat 20% rate on Vietnam-sourced income only. No personal deductions or family allowances apply to non-residents.
The Residency Risk for Frequently Travelling Expats
A tax resident expat earning VND 100 million per month is subject to progressive rates with a marginal rate of 35% on income above the top threshold. The same individual as a non-resident pays flat 20% on Vietnam-sourced income with no deductions.
The correct approach: maintain a day-count log with entry and exit stamps, retain visa documentation and flight records as residency evidence, and proactively determine residency status at the start of each calendar year. For individuals close to the 183-day threshold, a decision on residency status should be made before year-end, not after it.
The 2026 PIT Reform: What Changed and When
The Staggered Effective Date Employers Must Understand
Law 109/2025 has two implementation layers that the majority of multinational payroll teams have not separated correctly. Salary and wage provisions apply from the 2026 tax period, meaning January 1, 2026. The full law takes effect July 1, 2026. Employers who continued applying the old 7-bracket table or the old personal deduction of VND 11 million per month in Q1 2026 have been over-withholding PIT from resident employees for multiple months.
Those employees face refunds at year-end PIT finalization. Payroll teams face reconciliation complexity and potential employee relations issues when the difference becomes apparent. The correct approach is to update withholding systems retrospectively to January 1, 2026, recalculate accumulated year-to-date differences, and apply the correction before the next payroll cycle.
The New Progressive Bracket Structure
Vietnam PIT brackets 2026 simplify from 7 to 5 levels. The monthly income thresholds under the new structure are: 5% for income up to VND 5 million; 10% for VND 5–10 million; 15% for VND 10–18 million; 20% for VND 18–32 million; 25% for VND 32–52 million; 30% for VND 52–80 million; and 35% above VND 80 million under the previous 2025 rules. Under the 2026 rules effective from July 1, the top 35% rate applies above VND 100 million per month rather than VND 80 million.
This threshold change means a slice of income that previously entered the top rate band earlier is now taxed at the layer below first. For high-income foreign employees earning above VND 80 million per month, the monthly PIT saving is meaningful. The simplified 5-bracket structure also reduces payroll calculation complexity for multinational employers managing allowances, bonus cycles, and mid-month employment changes across multiple payroll systems.
Increased Personal and Family Deductions
Two deduction increases apply from January 1, 2026. The personal deduction rises from VND 11 million to VND 15.5 million per month (from VND 132 million to VND 186 million annually). The dependent deduction rises from VND 4.4 million to VND 6.2 million per month per qualifying dependent.
For a tax resident expat with one dependent, the combined monthly deduction floor rises from VND 15.4 million to VND 21.7 million. For individuals with two dependents, the monthly deduction rises from VND 19.8 million to VND 27.9 million. At the top marginal rate of 35%, every additional VND 1 million in deduction produces VND 350,000 in monthly tax saving. The deduction increase is the most visible part of the 2026 PIT reform for individual taxpayers.
Non-Taxable Allowances: How to Structure Senior Expat Packages
What Employer-Provided Benefits Can Be Excluded from Taxable Income
The 2026 reform expanded Vietnam’s exempt income categories from 14 to 21, effective July 1, 2026. For senior expat package design, certain employer-provided benefits can be fully excluded from the employee’s taxable income when properly documented and structured.
Relocation costs: A one-time payment covering relocation to Vietnam is fully exempt from PIT, no cap applies. Home leave flight: One round-trip airfare per year to the expat’s home country, paid by the employer, is non-taxable. School fees: Tuition paid directly by the employer to a school for the expat’s children, from kindergarten through high school, is fully exempt. The payment must go directly to the institution, reimbursement to the employee is taxable. Housing allowance: Exempt up to 15% of the individual’s total taxable income, amounts above 15% are subject to PIT at the applicable rate. Business communications: Phone and internet costs reimbursed in line with a stated employer policy are exempt with supporting documentation.
The Documentation Requirement That Determines Deductibility
Exempt status for employer-provided benefits requires contemporaneous documentation. Housing allowances require an employer policy or signed lease agreement. School fees require direct payment records from the institution. Communication allowances require a company policy document specifying eligible costs.
Annual PIT finalization audits consistently target incorrectly claimed exempt allowances. Missing documentation is the primary audit failure point for multinational payroll operations in Vietnam. Benefits should be structured and documented at the package design stage, not reconstructed at year-end.
The 5-Year PIT Exemption for High-Tech Experts
Who Qualifies and How to Claim
The 2026 PIT law introduces a 5-year full PIT exemption for experts working in artificial intelligence, semiconductor manufacturing, and research and development sectors. This provision directly connects to the priority incentive sectors under Decree 96/2026 and positions Vietnam as a competitive destination for high-value technical talent.
Qualification requires certification, typically from the Ministry of Science and Technology or the relevant sector authority, confirming that the individual’s work qualifies under the applicable definition. Employers managing payroll for qualifying experts must apply the withholding exemption correctly. Over-withholding and reclaiming at annual PIT finalization creates unnecessary cashflow friction. Under-withholding without proper documentation creates audit exposure. The certification and employer registration process should be completed before the first payroll period in which the exemption applies.
Service Contracts vs Labour Contracts: How Engagement Type Affects Tax Treatment
The engagement structure used to contract a foreign individual in Vietnam determines how PIT is applied month by month.
Income paid under labour contracts is subject to monthly progressive PIT withholding by the employer on the standard bracket schedule. Income under service contracts, which are not treated as labour contracts under Vietnamese tax law, follows a different process. Payments exceeding VND 2 million per month under service contracts require 10% PIT withholding at source as a pre-payment. At year-end PIT finalization, this income is included in total assessable income and taxed at progressive rates, with the 10% already withheld credited against the total liability. Any shortfall is payable at finalization.
This distinction is material for short-term assignments and project-based expat arrangements. A foreign individual engaged under a service contract who is also a tax resident will have the service income consolidated into their annual progressive calculation, often resulting in additional tax payable at finalization that was not visible during the year.
Double Taxation Agreements: Relief for UK and European Expats
Vietnam’s DTA Network
Vietnam has over 80 Double Taxation Agreements in force, including with the United Kingdom, France, Germany, the Netherlands, Singapore, Japan, and Australia. DTAs can reduce or eliminate Vietnam withholding rates on certain income categories, particularly for short-term assignments, board directors’ fees, interest income, and investment income.
For UK-based investors and multinational corporations with expat employees assigned to Vietnam, the UK-Vietnam DTA provides relief mechanisms that are consistently underutilised because the claim process is not well understood.
The DTA Claim Process
To apply for DTA relief in Vietnam, the individual submits Form 01-1/HTQT to the Vietnamese tax authority, supported by a tax residency certificate from the home country’s tax authority confirming the individual’s treaty-country resident status for the relevant tax year. The certificate must be current, backdated certificates issued after the income was received are not accepted.
DTA applications should be submitted before or at the time of annual PIT finalization, not retrospectively after over-withholding has occurred. Processing lead time should be factored into assignment planning. For European expats, the DTA claim route is the primary mechanism for avoiding double taxation on income that may be subject to both Vietnamese PIT and home country taxation obligations simultaneously.
Employer Payroll Obligations: What Compliance Requires in 2026
Monthly Withholding, Remittance, and Annual Finalization
Employers must withhold PIT monthly from employee salaries and remit to the tax authority by the 20th of the following month. From January 1, 2026, withholding calculations must apply the new personal deduction of VND 15.5 million and the new dependent deduction of VND 6.2 million per qualifying dependent.
Employer-led annual PIT finalization is due by March 31 for resident employees who authorise the employer to finalise on their behalf. Individual self-filing is due April 30, or the next working day if this falls on a holiday or weekend. Foreign employees ending their Vietnam assignment must finalise PIT within 45 days of departure. Employers should build this 45-day obligation into standard expat offboarding checklists to avoid penalties for missed finalization, fines reach VND 25 million for late filing.
Foreign employees receive a tax identification number upon registration. From 2025, Vietnam is moving toward using Personal Identification Numbers (PINs) as the primary identifier, foreign individuals without a Vietnamese PIN continue using their existing tax code. The eTax Mobile application now allows online PIT filing, pre-populated form generation, and real-time tax status tracking.
How Viettonkin Supports Expat Tax and Payroll Compliance in Vietnam
For multinational employers and expatriate professionals navigating Vietnam’s 2026 PIT reform, on-the-ground advisory expertise reduces compliance risk and ensures payroll systems reflect the correct withholding obligations from January 1, 2026. Viettonkin’s Vietnam tax and compliance services cover residency status determination, payroll system update advisory, non-taxable allowance structuring, high-tech expert exemption claims, DTA applications, and annual PIT finalization management for foreign-invested enterprises.
Frequently Asked Questions
What Is the Vietnam Personal Income Tax Rate for Expats in 2026?
Tax-resident expats pay progressive PIT rates of 5–35% on worldwide income. Under the 2026 reform (effective July 1), the top 35% rate applies above VND 100 million per month, up from the previous VND 80 million threshold. Non-residents pay a flat 20% on Vietnam-sourced income with no deductions.
Does Vietnam Have a Double Taxation Agreement with the UK?
Yes. Vietnam’s DTA with the United Kingdom is in force and provides relief mechanisms for income that might otherwise be subject to taxation in both countries. Relief is claimed by submitting Form 01-1/HTQT to Vietnamese tax authorities with a current UK tax residency certificate from HMRC.
