Tax finalisation is Vietnam's annual reconciliation of personal income tax: after the calendar year ends, the tax withheld during the year is compared with the tax actually due, and the difference is paid or refunded. Most foreign employees with a single employer authorise that employer to finalise for them. Those with income from more than one source, income from abroad as residents, or no employer in Vietnam usually finalise themselves, by a deadline that has generally been the end of the fourth month after the tax year. Foreigners ending their stay are normally expected to settle their tax before leaving Vietnam.
This guide explains what finalisation is for, how to get and use a tax code, who files and when, how refunds work, and the steps to take before departure. Deadlines and forms are set by the Law on Tax Administration and implementing rules, and Vietnam's tax authority was reorganised in 2025, so confirm current procedures with your local tax office or an accountant.
Why finalisation exists
Monthly withholding is an estimate. An employer deducts tax each month based on that month's salary and the information it holds, but the tax a resident actually owes is calculated on the whole year's income, with deductions and credits applied across the year. Bonuses in one month, a change in residency status, a second job, dependants registered partway through the year or foreign income all mean the monthly figures will not add up to the right annual answer.
Finalisation corrects this. For residents, it recalculates the year's tax on total income, subtracts what was withheld and either produces a further amount to pay or an overpayment to refund or carry forward. For non-residents, tax withheld at the flat rate is usually final, which is why finalisation is generally a residents' concern.
For foreigners, finalisation has a second role: it produces the document that shows your tax affairs are in order. Banks ask for it when you send savings abroad, immigration processes occasionally touch on it, and it is the cleanest proof that you are leaving the country with no tax debt.
Getting and using a tax code
Every taxpayer in Vietnam is identified by a tax identification number, usually called a tax code. Since mid-2025, Vietnamese citizens use their personal identification number as their tax code. Foreigners, who do not have that number, are issued a separate tax code. Employees normally receive one when their employer registers them with the tax authority at the start of employment; people without an employer register themselves at the tax office responsible for where they live, with a passport and supporting documents.
Keep your tax code for the whole of your stay, even if you change employer. A new employer should use the existing code rather than creating a second one, which causes confusion at finalisation. If you leave Vietnam and later return, your old code should normally still be valid; mention it to the new employer.
The tax code also appears in other places: the bank may record it on your account, your employer puts it on certificates of tax withheld, and you will need it to register dependants. Dependants, such as a non-working spouse or children, are registered with their own tax codes or identification details so that residents can claim deductions for them.
Check the details registered against your code once, early on. Foreign names are easily entered in a different order, with or without middle names, or with a passport number that later changes when you renew your passport. A mismatch between the tax records, your bank account and your employer's payroll is a small thing in January and a real obstacle in the week before you leave, when a bank compares documents line by line. If you renew your passport during your stay, ask your employer or the tax office to update the record, just as you would with the bank and the immigration authorities.
Who finalises, and how
The structure below reflects common practice under the current rules. The exact conditions for authorising an employer have been adjusted over the years, so check the conditions that apply to your tax year.
| Your situation | Who usually finalises | What you do |
|---|---|---|
| Resident with salary from one employer for the year, no other income | Employer, on your authorisation | Sign the authorisation form; receive a certificate of tax withheld |
| Changed employers during the year in certain cases allowed by the rules | New employer, if the conditions are met | Provide documents from the previous employer; ask HR |
| Resident with income from two or more employers, or other income | You, directly with the tax office | Gather certificates of tax withheld and income records; file the return |
| Resident with income from abroad | You, directly | Include foreign income and claim credit for foreign tax paid, with evidence |
| Non-resident with tax withheld at the flat rate | Usually no finalisation | Keep the certificate of tax withheld |
When in doubt, assume you must finalise yourself and ask HR or an accountant to confirm otherwise. Failing to finalise when required is a breach that carries penalties, while finalising unnecessarily costs only time.
Finalising yourself, step by step
Self-finalisation is manageable for straightforward cases, though many foreigners use an accountant for the first year.
- Collect certificates of tax withheld from every Vietnamese payer for the year, plus records of any income from abroad and of foreign tax paid.
- Check your residency status for the year and count your days in Vietnam from your passport and immigration records.
- Confirm your registered dependants and their documents, if you claim deductions for them.
- Prepare the annual finalisation return on the form prescribed for individuals, using the tax authority's online system or a paper form at the tax office responsible for you.
- Submit by the deadline, which for individuals finalising directly has generally been the last day of the fourth month after the end of the calendar year, moved to the next working day if it falls on a holiday.
- Pay any additional tax by the same deadline, or request a refund or carry-forward of overpaid tax.
Late filing and late payment attract penalties and daily late-payment interest. If you are abroad at the deadline, an authorised representative, often an accounting firm, can file for you.
Records to keep every year
Certificates of tax withheld. Ask each Vietnamese payer for the certificate showing income paid and tax withheld for the year. Employers issue them on request, and they are the backbone of any finalisation and of later bank requests.
Labour contracts and amendments. Contracts, salary changes and secondment letters show what you were paid and why. They also help prove the source of savings when you move money abroad.
Entry and exit records. Keep scans of every passport page with stamps, or a log of travel dates. Day counts decide residency, and memory is unreliable after a busy year.
Leases. Rental contracts matter for the habitual residence test and are often requested when residency is unclear.
Foreign income and tax documents. Statements of interest, dividends, rent or pension received abroad, and proof of foreign tax paid, are needed to report worldwide income and claim credits as a resident.
Dependant documents. Birth and marriage certificates, with translations and legalisation where needed, for registering dependants.
Doing it yourself or using an accountant
A resident with one employer and no other income rarely needs outside help: the employer handles finalisation, and the employee's job is to give accurate information and keep the certificate. Once your situation becomes more complicated, the balance shifts. Income from abroad, two employers in a year, a first or last year with split residency, rental income from property, dependants in another country, or a secondment from a foreign company all involve judgement calls and documents that an experienced accountant handles routinely.
When choosing help, look for a firm or individual licensed to provide tax agent services in Vietnam and experienced with expatriate tax, and ask what is included: residency analysis, preparation and filing, liaison with the tax office, and follow-up on refunds. Ask also how they will handle documents in English and whether they can act as your representative after you leave Vietnam.
Whatever you decide, keep ownership of your own records. Accountants come and go, and the person who needs to find the year's documents three years later is you.
Refunds and overpayments
Foreign employees are often due refunds, particularly in their first or last year in Vietnam, after registering dependants late, or when a bonus pushed monthly withholding above the annual liability. A refund is requested on the finalisation return, and the tax authority processes it after checking. You can ask for the money to be paid into a bank account or to be offset against future tax.
Refunds take time and occasionally lead to questions or an audit of the return, so make sure your documents are complete and consistent before you submit. If you are leaving Vietnam, keep a Vietnamese account open until the refund arrives or arrange for it to be paid to an account you can still access, and give the tax office contact details that will work after you leave.
Many people never claim small refunds because the process seems daunting. If the amount is meaningful, it is worth the effort or the fee for an accountant; it is your money.
Settling tax before you leave Vietnam
Leaving Vietnam at the end of a contract or for good is when finalisation matters most. The rules require foreigners who end their employment and leave to settle their tax for the period before exit, rather than waiting until the normal deadline. In practice this means finalising the part-year: calculating tax on income up to departure, applying your residency status for that period, paying any balance or claiming a refund.
Start the process at least a month before departure. Ask your employer whether it can finalise for you on exit, and if not, engage an accountant. Make sure your final salary, bonus and any severance are included, since they are often paid after the last working day. Keep the finalisation documents: they are what the bank will ask for when you transfer your savings home, as explained in the guide on moving money out of Vietnam.
Unsettled tax can follow you. The tax authority can request a temporary exit suspension for individuals with overdue tax debts, which may affect you on a later visit, and a dormant tax issue can complicate a future work permit or visa. A clean exit is far easier than repairing it from abroad.
Câu hỏi thường gặp
Do I have to file a tax return in Vietnam as a foreigner?
If you are a tax resident, you generally need an annual finalisation, either through your employer on authorisation or by filing yourself. Non-residents whose tax has been withheld at the flat rate usually do not need to finalise. Residents with several income sources or foreign income normally file themselves.
What is the deadline for personal income tax finalisation in Vietnam?
For individuals finalising directly, the deadline has generally been the last day of the fourth month after the end of the calendar year, with a shorter deadline for employers finalising on employees' behalf. Deadlines move to the next working day when they fall on holidays. Confirm the date for your tax year with the tax office.
How do I get a tax code in Vietnam as a foreigner?
Most employees receive a tax code through their employer, which registers them with the tax authority when they start work. Foreigners without an employer register directly at the tax office responsible for their place of residence, with a passport and supporting documents. Keep the same code for your whole stay.
Can my employer finalise my taxes for me?
Yes, if you meet the conditions, typically having salary from that employer as your only income for the year, with some exceptions for changes of employer. You sign an authorisation, and the employer includes you in its finalisation. If you have other income, you usually need to finalise yourself.
Can I get a tax refund in Vietnam when I leave?
Yes. If tax withheld during the period exceeds the tax due, you can claim a refund in your finalisation on exit. Processing takes time, so keep a bank account you can access and give the tax office contact details that will work after you leave, or use a representative.
What happens if I leave Vietnam without finalising my tax?
You may remain liable for unpaid tax, penalties and late-payment interest, and the tax authority can request an exit suspension for individuals with overdue tax debts, which may affect you on a return visit. It can also prevent banks from transferring your savings abroad. Settle tax before leaving.