1. The issue: when must the expert self-finalize?
Not everyone may authorize the employer to finalize. Experts with income from two or more sources beyond the permitted threshold, experts on short contracts, and experts who left before the authorization date must file their own finalization. Filing in the right place by the right deadline is where foreign staff most often err, because the filing office follows the income source, not the residence address.
2. Legal basis
- Point d, Clause 6, Article 8 of Decree 126/2020/ND-CP — the scope of authorization; outside that scope the individual finalizes directly with the tax authority.
- Circular 80/2021/TT-BTC — the self-finalization dossier, Form 02/QTT-TNCN, and the rules for choosing the receiving tax authority.
- 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 — family allowances from the 2026 tax year: VND 15.5 million/month for the taxpayer and VND 6.2 million/month per dependent (Resolution 110/2025/UBTVQH15).
3. Cases where authorization is unavailable
Individuals with income from two sources where casual income averages above VND 15 million per month (point b, clause 1, Article 51 of Decree 253/2026/ND-CP); individuals with only sub-3-month contracts or casual income withheld at 10%; individuals no longer working at the payer at finalization time (except foreigners ending their contract who fall in the post-departure authorization case); and certain refund situations — all must self-finalize their entire annual income.
4. Where to file
A self-finalizing resident files at the tax authority directly managing the payer of the largest income source of the year. If the largest source cannot be determined (several comparable sources), the individual may choose the tax authority where personal allowances were claimed for themselves or that of their place of residence. Foreigners ending work in Vietnam must complete finalization before leaving the country, at the tax authority managing their main income payer — the most forgotten milestone and the origin of many later back-assessments.
5. Dossier and computation
The dossier comprises: finalization return Form 02/QTT-TNCN; withholding certificates from each payer; income confirmation letters (especially for offshore-paid portions); registered dependent dossiers; foreign tax payment documents if a treaty credit is claimed. The individual aggregates all annual income, applies the progressive scale after allowances, credits amounts withheld — paying the shortfall or claiming a refund/offset for the excess. Deadline: the last day of the fourth month after the tax year ends for self-filing individuals.
6. Key takeaways
Self-finalization is not hard in arithmetic but in gathering cross-border evidence: withholding certificates from the parent company, foreign-currency income confirmations, dependent dossiers. Start collecting in the first month of the finalization season rather than at the end-of-April deadline.
7. Frequently asked questions
1. I have salaries at two companies and both withheld — must I still self-finalize?
Yes. Income from two or more sources outside the authorization conditions requires a consolidated self-finalization, even if each payer withheld correctly on its own payments.
2. If I cannot identify the largest income source, where do I file?
You may choose the tax authority where your personal allowance was claimed or the tax authority of your place of residence, per the finalization guidance in Circular 80/2021/TT-BTC.
3. If I overpaid, where does the refund go?
State in the finalization dossier whether you want the refund paid to your bank account or offset against future liabilities; refunds are processed after the tax authority reconciles the payers’ withholding data.
4. A foreigner already left for good and then remembers the missing finalization — what happens?
The obligation does not disappear with departure. It must still be completed through an authorized person in Vietnam or on return; the late finalization accrues late interest and can be back-assessed on data matching — finalizing before departure is always the right course.
This article has been quality-reviewed by the FLAW AI Legal Council
