1. The issue: authorization lets the employer finalize on the expert’s behalf
At the end of the tax year, a resident individual with employment income may authorize the income payer to finalize PIT on their behalf instead of filing personally. For foreign experts this is the near-default route — but it is valid only when the statutory conditions are met; a defective authorization leaves the finalization incomplete and the obligation falls back on the individual.
2. Legal basis
- Point d, Clause 6, Article 8 of Decree 126/2020/ND-CP — the cases in which an individual may authorize the income-paying organization or individual to finalize tax on their behalf.
- Circular 80/2021/TT-BTC — the PIT finalization authorization letter on Form 08/UQ-QTT-TNCN (Appendix II); guidance in the General Department of Taxation’s Official Letter 883/TCT-DNNCN.
- Point b, Clause 1, Article 51 of Decree 253/2026/ND-CP — individuals with casual income elsewhere averaging no more than VND 15 million per month, already withheld at 10%, are not required to finalize that casual income (the current threshold, replacing the old VND 10 million/month).
- Law 109/2025/QH15 and Decree 253/2026/ND-CP — the finalization framework under the progressive scale and allowances from the 2026 tax year.
3. The three authorizable cases
(1) The individual has an employment contract of 3 months or more with one payer and is actually working there at the time of authorization — including those who have not worked a full 12 months in the year; employees transferred within the same system due to corporate reorganization (merger, split, division) authorize the new organization. (2) An individual in case (1) who also has casual income elsewhere averaging no more than VND 15 million per month, already subject to 10% withholding (point b, clause 1, Article 51 of Decree 253/2026/ND-CP). (3) Specific to foreigners: an individual who ended their employment contract in Vietnam without finalizing before departure may authorize the income payer, or another organization or individual, to finalize on their behalf.
4. Procedure and responsibility
The individual signs the authorization letter on Form 08/UQ-QTT-TNCN, committing to the accuracy of the income information at that payer; the payer aggregates and finalizes on their behalf by the organizational finalization deadline (the last day of the third month after the tax year ends). The payer finalizes on the basis of the information provided — income outside the committed scope remains the individual’s responsibility if a difference emerges.
5. Two traps for foreign experts
First, casual side income (consulting or teaching fees) averaging above VND 15 million per month (point b, clause 1, Article 51 of Decree 253/2026/ND-CP) destroys eligibility even when the main employment qualifies — the individual must self-finalize; casual income averaging no more than VND 15 million per month with 10% already withheld does not require finalization of that portion. Second, experts ending their contract and leaving should complete the case-(3) authorization before departure, with agreed mechanics for receiving a refund or paying a shortfall, so the file is not stranded while they are abroad.
6. Key takeaways
Finalization authorization is a conditional delegation, not a default. Before each finalization season, screen every expert: a contract under 3 months, side income above the threshold, or no longer being employed at the authorization date — each alone moves the file to self-finalization.
7. Frequently asked questions
1. An expert who worked only 8 months in the year — can they authorize?
Yes, if they hold an employment contract of 3 months or more with one payer and are working there at the time of authorization — the law does not require a full 12 months.
2. Which form is the finalization authorization letter?
Form 08/UQ-QTT-TNCN issued with Circular 80/2021/TT-BTC (Appendix II). The individual signs it in favor of the payer before the payer prepares the finalization on their behalf.
3. The expert has already left Vietnam without finalizing — what now?
A foreigner who ended their contract in Vietnam without finalizing before departure falls in the case that may authorize the income payer, or another organization or individual, to finalize on their behalf — the authorization should be signed before leaving Vietnam so the file is not stranded.
4. If the tax authority later finds undeclared income, who is liable?
The individual is responsible for the accuracy and completeness of the information committed in the authorization; the payer finalizes on that basis. Income outside the committed scope is back-assessed on the individual.
This article has been quality-reviewed by the FLAW AI Legal Council
