When starting a business, initial tax registration is a mandatory obligation for all business households and individuals. Registering on time helps you avoid penalties and facilitates related procedures such as opening bank accounts, borrowing capital, and using electronic invoices.
This article will provide detailed guidance on subjects, procedures, documents, and especially the deadline for first-time business household tax registration according to current regulations, helping you prepare fully and follow the correct process.
Who Needs to Register for Tax for the First Time?
According to Point i, Clause 2, Article 4 of Circular 105/2020/TT-BTC, the following subjects must register for tax directly with the tax authorities:
- Households and individuals engaged in the production and trading of goods and services
- Individuals from countries bordering Vietnam who conduct business at border markets, border gate markets, and border gate economic zones
- Business households and individuals not required to register as business households but who have business activities
Deadline for Business Household Tax Registration
According to Article 33 of the Law on Tax Administration 2019:
Cases of registration through a one-stop-shop
The tax registration deadline coincides with the business household registration deadline as stipulated by law (the tax authority issues the tax identification number concurrently with the business household registration certificate).
Cases of direct tax registration with the tax authority
Within 10 working days from one of the following times:
- Being granted a business household registration certificate
- Commencing business operations (for households not required to register their business or not yet granted a certificate)
- Incurring obligations for withholding and paying tax on behalf of others
- Signing business contracts or agreements (for foreign contractors)
- Incurring personal income tax obligations
- Incurring a tax refund request
- Incurring other obligations to the state budget
How to Register for Tax for the First Time
Business households can choose one of the following two methods:
Method 1: Submit documents in person
Step 1: Prepare documents according to form 03-ĐK-TCT
Step 2: Submit documents at the Tax Department/Regional Tax Department where: - The fixed business location is, or - The rental real estate is, or - The place of residence (if there is no fixed location)
Step 3: Receive the tax identification number after the documents are approved
Method 2: Register online
Step 1: Access the Vietnam Tax portal (https://thuedientu.gdt.gov.vn)
Step 2: Log in using an electronic tax account or an electronic identification account
Step 3: Fill out and submit form 03-ĐK-TCT online
Step 4: Track results and receive the tax identification number via email/account
Note: Not all Tax Departments accept online registration. It is advisable to contact them in advance to confirm.

Documents to Prepare
When registering for tax for the first time, you need to prepare:
Mandatory documents: - Tax registration declaration form 03-ĐK-TCT - A copy of your Citizen Identity Card/ID Card (for Vietnamese citizens) or Passport (for foreigners)
Additional documents (if any): - List of dependent shops, stalls, and warehouses (form 03-ĐK-TCT-BK01) - A copy of the Business Household Registration Certificate (if registered)
Places to Submit Documents
| Method | Place of submission | Notes |
|---|---|---|
| Through one-stop-shop | Business Household Registration Agency | Tax authority issues TIN concurrently with Business Household Registration Certificate |
| Direct registration | Tax Department of the place of business/residence | Use form 03-ĐK-TCT |
| Through tax declaration | Tax Department where the obligation arises | Applicable for special cases |
Points to Note
Regarding deadlines: - Count 10 working days (excluding Saturdays, Sundays, and public holidays) - Late submission may result in a fine of VND 2-5 million according to Decree 125/2020/ND-CP
Regarding declaration: - Declare accurate and complete information about business lines - Estimated revenue should be close to actual revenue, avoid underreporting - Carefully check information before submission to avoid errors
Regarding documents: - Keep original copies of declarations and tax notices - Back up electronic documents for easy reference - Update any changes within 10 days
Related procedures to be done concurrently: - Register for a corporate bank account - Register for electronic invoice usage - Register for electronic tax transactions
GTG CRM - Comprehensive Management Solution for Business Households
After completing tax registration, managing invoices, orders, and periodic tax declarations becomes a major challenge for many business households. GTG CRM offers an integrated sales and electronic invoice management solution, which helps:
- Directly link with tax authorities, automatically synchronize data according to Circular 32/2025/TT-BTC
- Create and manage electronic invoices generated from cash registers
- Automate data entry and reporting of revenue and profit
- Multi-channel integration: electronic invoices, accounting, digital signatures
With GTG CRM, business households can confidently focus on business development while the system automatically handles tax obligations and invoice management accurately and in compliance with regulations.
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