Company and Business Tax Code Lookup Online
Enter a tax code, company name or address to look up business information: full name, international name, legal representative, business lines and tax code status. MST lookup, tax code verification and taxpayer lookup are all available here — free, no login required.
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What is a tax code?
A tax code (mã số thuế) is a number issued by the tax authority to a taxpayer to identify it throughout tax administration. Under Article 11 of the Law on Tax Administration 2025 (Law No. 108/2025/QH15), the tax code must appear on invoices, vouchers, records and documents used in business transactions, tax administrative procedures and when opening accounts at credit institutions. It is also used to exchange and share taxpayer information among management agencies.
Each tax code belongs to one taxpayer only. Looking up a tax code is therefore the fastest way to verify whether a business, household business or organization really exists and is currently operating or has ceased — before signing a contract, accepting an invoice or transferring money.
Company and Business Tax Code Lookup
Many people ask whether a company tax code and a business registration code are different. They are not — it is the same number. Once you know this, looking up business information by tax code is simple: one number gives you the full registration record.
Business Code and Tax Code
- The enterprise code is the tax code. Article 8, clause 1 of Decree 168/2025/NĐ-CP: each enterprise is assigned a unique number called the enterprise code, and "this code is also the enterprise's tax code". Therefore, looking up a company's tax code, looking up its enterprise code, or looking up an enterprise's TIN are all the same task, returning the same number.
- The enterprise code remains in effect throughout the entity's operation and is not reassigned to any other organization or individual. When an enterprise ceases operations, the code also ceases to be valid — so a tax code never points to two different companies.
- The code is generated and exchanged automatically between the National Information System on Business Registration and the Tax Registration Application System, and is printed on the Business Registration Certificate. This is why looking up enterprise information by tax code returns results that match between the tax authority and the business registration authority.
- Branches, representative offices and business locations have their own dependent unit code of 13 digits, linked to the 10-digit tax code of the parent company.
The information returned includes: full name, international name, abbreviated name, tax code, issue date, registered head office address, legal representative, business lines and current tax code status. These are also the three required items — business name, tax code and address — for issuing an invoice to a company.
Structure of 10-digit and 13-digit Tax Codes
Article 5 of Circular 90/2026/TT-BTC provides that tax codes issued by the tax authority take the form N1N2N3N4N5N6N7N8N9N10 - N11N12N13, where each group of digits has its own meaning:
Meaning of Each Digit Group
| Digit group | Position | Meaning |
|---|---|---|
| N1N2 | First 2 digits | Range number of the tax code |
| N3…N9 | Middle 7 digits | Assigned according to a defined structure, increasing sequentially from 0000001 to 9999999 |
| N10 | 10th digit | Check digit |
| N11N12N13 | Last 3 digits | Sequence numbers from 001 to 999, reserved for dependent units |
Telling Apart 10-digit and 13-digit Codes
- A 10-digit tax code is assigned to organizations that are independent units; to individuals who are foreign nationals, or Vietnamese citizens living abroad who do not have a personal identification number established from the National Population Database.
- A 13-digit tax code (first 10 digits, a hyphen, last 3 digits) is assigned to dependent units — branches, representative offices, business locations — and to certain special categories such as foreign contractors who pay tax through a Vietnamese party.
- The hyphen (-) is only a separator between the first 10 digits and the last 3 digits; it is not part of the number itself.
Personal Tax Code Lookup Using Citizen ID (CCCD)
This is where many people search for the wrong thing. From 01/07/2026, individuals, households, household businesses and individual business operators use their personal identification number as their tax code. In other words, the 12-digit number on your citizen identity card is your tax code — there is no separate number to look for. What you actually need to do is check whether your tax registration information matches the National Population Database.
Transitional Rules for Personal Tax Codes
- Taxpayers who were assigned a tax code before 01/7/2026 continue to use the assigned tax code; however, individuals, households, household businesses and individual businesses covered by Article 11, clause 1 of the Law on Tax Administration 2025 use their personal identification number as their tax code (Article 37, clause 2).
- Individuals who were assigned a tax code before 01/7/2025 whose tax registration information does not match exactly or is incomplete compared with the National Population Database will be switched to status 10 — "Tax code pending update of personal identification number information". In that case, they must complete the procedure to change their tax registration information before using their personal identification number as their tax code (Article 37, clause 3).
- Individuals who have been assigned more than one tax code must update their personal identification number on all of those codes so that the tax authority can integrate and consolidate tax data under the personal identification number (Article 37, clause 4).
- Invoices, vouchers and tax documents prepared under the former tax code remain valid for continued use, and do not need to be amended to the personal identification number (Article 37, clause 4).
- Individuals, households and household businesses can check whether their information matches the National Population Database through the National Public Service Portal, the Tax Administration Information System, or their electronic transaction account. If there are errors, they should contact their directly managing tax authority or the local tax office at their place of residence (Article 37, clause 5).
The tool on this page looks up taxpayers that are organizations, enterprises and household businesses. Personal tax registration information is protected personal data, accessible only to the person concerned through their identity account on the National Public Service Portal, the eTax Mobile app or an electronic transaction account with the tax authority. No third-party website can legitimately look up another person's personal tax code from a citizen ID number.
→ See the full guide at guide to looking up personal tax codes with a citizen ID and household business tax codes.
How to Look Up Tax Codes Online
Whether you call it MST lookup, tax code check, tax code verification or taxpayer lookup, there are only four official ways to look up a tax code using authoritative data, listed below.
Four Official Lookup Channels
- Right on this page — enter the tax code, business name or address in the search box above. Results include full name, international name, abbreviated name, issue date, legal representative, business lines and tax code status. Entering a correct tax code takes you directly to the detail page. No login or captcha is required.
- General Department of Taxation e-portal — the taxpayer (NNT) lookup page, with two separate versions: lookup for organizations and enterprises and lookup for personal income tax taxpayers. Both require a tax code and a captcha, and you may add a name or address. Results return the tax code, taxpayer name, address, managing tax office and tax code status.
- National business registration portal at dangkykinhdoanh.gov.vn — search by name or business registration number and confirm the captcha. Results focus on business registration data: foreign-language name, abbreviated name, legal form, founding date and legal representative.
- For your own tax information — use the eTax Mobile app, the National Public Service Portal or an electronic transaction account. This is the only channel that shows the reconciliation status between your tax registration information and the National Population Database — see details on the personal tax code page.
10 Tax Code Statuses
The tax code status shows whether a taxpayer is operating normally or has ceased, temporarily suspended or abandoned its business address. The list below is taken from Appendix I of Circular 90/2026/TT-BTC — the document that has replaced Circular 86/2024/TT-BTC since 01/07/2026.
Current List of Tax Code Statuses
| Code | Status name | Description |
|---|---|---|
| 00 | Taxpayer issued tax code | A tax code has been issued. It is further classified as: not yet operating, operating, or an individual with no tax obligation arising yet. |
| 01 | Ceased operations; tax code closure completed | Dissolved, bankrupt, divided, merged or consolidated, or a household business converted to a small and medium enterprise, and the tax code has been fully closed. |
| 02 | Transferred to another tax authority (awaiting receiving authority) | Procedures at the departing tax authority are complete, but registration with the receiving tax authority or business registration office has not yet been done. |
| 03 | Ceased operations; tax code closure not yet completed | Tax code closure procedures are in progress, or the business license has been revoked, or tax debt enforcement has started but is not yet complete. |
| 04 | Operating (household or individual business without complete tax registration information) | Appendix I of Circular 90/2026/TT-BTC records this status as no longer valid. |
| 05 | Temporarily suspended operations | Approved by the tax authority or competent authority to temporarily suspend operations for a set period. |
| 06 | Not operating at registered address | The tax authority issued a notice after verifying on site at the registered head office. This is the highest-risk status for transactions. |
| 07 | Awaiting bankruptcy procedure | The court has issued a decision to open bankruptcy proceedings and has sent it to the tax authority. |
| 09 | Pending verification of operating status at registered address | No tax return filed after 2 reminders, mail returned by the postal service, or classified as high risk when registering e-invoices. |
| 10 | Tax code pending update of personal identification number | An individual with a tax code that uses a personal identification number in place of the tax code, but whose information does not match the National Population Database. |
Each status code is further broken down by reason code. For example, status 01 has reason codes 03 (business reorganization), 04 (individual died, declared missing or lost civil act capacity), 07 (dissolution), 08 (bankruptcy) and 21 (household business converted to a small or medium enterprise). See the full list in Appendix I of the circular.
Distinguishing Common Terms
There are many terms used around tax code lookup. Most are simply different names for the same thing, but the last three rows of the table below are genuinely different and are often confused.
Which Terms Are the Same and Which Differ
| Term | What it actually is |
|---|---|
| Look up tax code · check TIN · verify tax code · check tax code | The same task: finding the tax code number of an entity and checking the current status of that code. |
| Enterprise code · company tax code · enterprise TIN | The same number. Article 8, clause 1 of Decree 168/2025/NĐ-CP: the enterprise code is also the enterprise's tax code. |
| Look up enterprise information · look up company information | Broader than tax code lookup: in addition to the number, it includes the international name, abbreviated name, issue date, address, legal representative, and business lines. |
| Look up taxpayer · look up taxpayer information (NNT) | A term used by the tax authority. "Taxpayer" covers organizations, enterprises, household businesses and individuals alike — broader than "enterprise". |
| Electronic tax portal · e-tax information portal | Different from tax code lookup. This is the electronic tax transaction system for filing and paying taxes and checking one's own tax obligations; it requires logging in with a tax account. |
| Dependent unit code | Different from the parent company's tax code. It is a 13-digit code assigned to branches, representative offices and business locations, appended after the 10-digit code of the controlling entity. |
| Personal identification number | From 01/7/2026, this is the tax code of individuals, households, household businesses and individual businesses (Article 37, clause 2 of Circular 90/2026/TT-BTC). |
Frequently Asked Questions about Tax Codes
Quick Answers
What is a tax code?
A tax code is a number assigned by the tax authority to a taxpayer to identify it throughout the entire tax administration process. Under Article 11 of the Law on Tax Administration 2025, the tax code is printed on invoices, vouchers, records and documents when conducting business transactions, carrying out tax administrative procedures and opening accounts at credit institutions; it is also used to exchange and share information about taxpayers among management agencies.
How do I look up a personal tax code using my citizen identity card (CCCD)?
From 01/7/2026, individuals, households, household businesses and individual businesses use their personal identification number as their tax code (Article 37, clause 2 of Circular 90/2026/TT-BTC). This means the 12 digits on your citizen identity card are your tax code — there is no need to look up a different number. What you actually need to do is check whether your tax registration information matches the National Population Database, through the National Public Service Portal, the eTax Mobile app or your electronic transaction account with the tax authority.
I have an old 10-digit personal tax code. Can I still use it?
Yes. Article 37, clause 4 of Circular 90/2026/TT-BTC states clearly: when a tax code has been integrated into the personal identification number, invoices, vouchers, tax documents and other legally valid papers already prepared under the old tax code continue to be used, and do not need to be amended to the personal identification number. If you have ever been assigned more than one tax code, you need to update your personal identification number on all of those codes so that the tax authority can consolidate the data.
How do 10-digit and 13-digit tax codes differ?
Under Article 5, clause 2 of Circular 90/2026/TT-BTC, a 10-digit tax code is assigned to organizations that are independent units and to individuals who are foreign nationals or Vietnamese citizens living abroad without a personal identification number. A 13-digit tax code — consisting of the first 10 digits, a hyphen and 3 sequence digits from 001 to 999 — is assigned to dependent units such as branches, representative offices and business locations. So when you see a code in the form 0100109106-015, it is a branch of the enterprise with tax code 0100109106.
What information do I need to look up an enterprise's tax code?
You only need one of three things: the tax code, the enterprise name, or the address. Enter it into the search box above, and the tool will list matching enterprises together with their tax code, legal representative and head office address. If you already have the tax code, the results will go directly to the detail page, with the full international name, abbreviated name, issue date, business lines and tax code status.
Are the enterprise code and the tax code the same thing?
Yes, they are the same. Article 8, clause 1 of Decree 168/2025/NĐ-CP provides: "Each enterprise is assigned a unique number called the enterprise code. This code is also the enterprise's tax code." Therefore, looking up an enterprise code, looking up a company tax code or looking up an enterprise TIN all return the same number. Note that the earlier decree — Decree 01/2021/NĐ-CP — also stated that this code was simultaneously the social insurance participation code of the entity; that provision has been removed.
Where is the fastest place to check a tax code online?
The fastest option is the search box at the top of this page — no login required, and no verification code to enter. Type the tax code to check the TIN directly, or type the company name if you do not remember the number. The results show the current tax code status, so this is also a quick way to check whether a business partner is still operating or has ceased operations before signing a contract or accepting its invoices.
How do I find my own tax code?
It depends on who you are. If you are an enterprise, household business or organization: the tax code is printed on the Business Registration Certificate, or you can look it up by entity name directly on this page. If you are an individual: from 01/7/2026, the personal identification number on your citizen identity card is your tax code (Article 37, clause 2 of Circular 90/2026/TT-BTC); there is no other separate number to find — you only need to check whether your tax registration information matches the National Population Database.
How do I look up taxpayers on the electronic tax information portal?
The tax authority's taxpayer lookup page has two separate versions: lookup for organizations and enterprises and lookup for personal income taxpayers. You enter the tax code — a mandatory field — together with the verification code, and you may add the name or address to narrow the results. The system returns the tax code, taxpayer name, head office address, managing tax authority and tax code status. Many older documents still refer to this as the General Department of Taxation's tax code lookup page; under Circular 90/2026/TT-BTC, tax authorities are now organized into Tax Departments, Provincial Tax Departments and Local Tax Offices.
Which tax code statuses are risk signals in transactions?
The most serious is status 06 — "Taxpayer not operating at its registered address". The tax authority issues this notice only after coordinating with the competent authority to verify at the head office. Next are status 03 (ceased operations but tax code not yet closed) and status 09 (pending verification of operating status). Invoices received from entities in these statuses carry a high risk of being rejected at tax finalization.
Where can I look up the tax code of a household business?
Under Article 37, clause 2 of Circular 90/2026/TT-BTC, a household business now uses the personal identification number of the household head as its tax code. For household businesses that were previously assigned a tax code by the tax authority, you can still look it up using that same code or by the household business name on this tool. When a household business converts to a small or medium-sized enterprise, its former tax code is switched to status 01 with reason code 21.
Why has the information on the enterprise I looked up not been updated?
Data is synchronized periodically, and the most recent synchronization time is displayed on the "Data updated" line on each detail page. If an enterprise has just changed its tax registration information, you can click the "Update now" button on that page to force the system to retrieve the latest data instead of waiting for the next synchronization cycle.
Can a tax code whose validity has been terminated be restored?
Yes, in some cases. Article 17 and Article 18 of Circular 90/2026/TT-BTC set out the cases in which a tax code may be restored and the procedure for processing restoration applications. Conditions and documents differ depending on the reason the tax code was terminated, so you should check the exact status and reason code recorded in the tax authority's system before submitting an application.
Legal Basis
Applicable Legal Documents
- Law on Tax Administration 2025 (Law No. 108/2025/QH15) — Article 11 on tax codes, effective from 01/07/2026.
- Decree 168/2025/NĐ-CP on business registration — Article 8, clause 1: the business registration number is also the enterprise's tax code.
- Circular 90/2026/TT-BTC on tax registration — Article 5 (tax code structure), Article 37 (transitional rules on personal identification numbers), Appendix I (list of tax code statuses). Effective from 01/07/2026.
- Circular 86/2024/TT-BTC has expired from 01/07/2026 under Article 36, clause 1 of Circular 90/2026/TT-BTC. Articles that still cite Appendix 1 of that circular for the list of tax code statuses are outdated.