1. Mandatory Month/Quarter-End Tax Obligations in Vietnam
Tax consultant services are essential in Vietnam, where businesses must fulfill their tax obligations monthly or quarterly depending on their revenue and current regulations. Some mandatory obligations include:
- Declaring VAT monthly or quarterly based on a revenue
- Reporting on invoice usage (if still using paper invoices or in some special cases).
- Temporarily paying corporate income tax (CIT) quarterly, based on actual business results.
- Declaring PIT (Personal Income Tax) based on monthly or quarterly payroll.
- Submit the FCT (Foreign Contractor Tax) declaration within 10 days from the date the tax obligation arises (i.e., the payment date to the foreign contractor).
The introduction helps businesses grasp the mandatory “to-do list” and avoid under-declaration, incorrect declaration or late declaration.
2. Month-End Filing Process Managed by Tax Consultants
Even though businesses have an in-house accounting team, many monthly tax filing errors still occur due to a lack of a standard process. To avoid errors and ensure compliance, tax consultants often guide businesses through each step systematically: from checking invoices, comparing data to preparing and submitting declarations on time. Below is the standard process that tax experts recommend businesses apply every month.
2.1 Collecting & Verifying Monthly Documents
Tax consultants will guide businesses to collect and check all important documents:
- Input and output invoices of the month.
- Contracts, receipts and payment vouchers, bank statements.
- Timesheets, payroll, allowances for calculating personal income tax.
- Non-cash payment records (conditions for VAT deduction).
- Check the validity of invoices: tax code information, product description, tax rate, signing date.
2.2 Reconciliation of Accounting & Tax Data
Based on the guidance of tax experts, businesses conduct reconciliation:
- Output VAT – input VAT to calculate the amount of tax payable or deductible.
- Payroll and PIT to be deducted in the month.
- Accounts receivable – payable.
- Differences between actual documents and bookkeeping records.
2.3 Preparing Monthly Tax Returns
After the data has been reviewed, the tax consultant will guide the business to:
- Prepare a monthly or quarterly VAT declaration (depending on the reporting period).
- Prepare a PIT declaration deducted from monthly salary.
- Check and match the data on the declaration with the accounting books.
- Prepare an invoice report (if the business is subject to payment).
2.4 Internal Approval & Electronic Submission
Before submitting to the tax authority, the enterprise needs to:
- The Director or finance department reviews and approves the declaration according to the tax consultant’s instructions.
- Submit the electronic declaration on time.
- Pay VAT/PIT incurred during the period.
2.5 Post-Filing Compliance Follow-up
After submitting the declaration, the tax consultant recommends that the business continue to:
- Check the tax payment receipt to ensure the system accepts the declaration.
- Archive the records for tax audits/audits.
- Review errors from the previous period to adjust the declaration process for the next period.

3. Key Requirements for Quarter-End Fillings
Quarter-end filings in Vietnam involve more than just summing up numbers—they require careful planning, compliance with Vietnam income tax regulations, and meticulous verification. Engaging a tax consultant in Vietnam ensures your business meets all obligations accurately and avoids penalties from the tax department.
3.1 Gather Complete Documentation
Before submitting quarterly tax filings, businesses must prepare all source documents for review:
- Sales invoices and delivery notes
- Purchase invoices and payment receipts
- Bank statements and financial agreements
- Payroll records, labor contracts, and insurance contributions
- Inventory counts and fixed asset schedules
3.2. Accurate Revenue and Expense Reporting
- Recognize revenue according to Vietnam income tax rules and accrual accounting.
- Match expenses to the correct revenue period.
- Exclude non-deductible expenses as per Vietnam tax regulations.
- Ensure all accruals, prepayments, and adjustments are correctly recorded.
3.3 VAT, CIT, and PIT Compliance
- Reconcile VAT collected and VAT input credits.
- Calculate PIT for employees, including part-time or foreign staff.
- Determine corporate income tax (CIT) provisional payments for the quarter.
- Check alignment between accounting records and tax reports to prevent discrepancies.
3.4 Reconciliation of Key Accounts
- Bank account balances vs. bank statements
- Accounts receivable and payable vs. confirmations from partners
- Inventory records vs. physical stock counts
- Fixed assets and depreciation schedules
- Loans, interest expenses, and other financial obligations
3.5. Internal Controls and Review
- Approval of all journal entries, adjustments, and corrections
- Double-check by accounting manager or controller to ensure accuracy
- Maintain segregation of duties to reduce errors
- Keep a full audit trail for submission and future inspection
Following these steps under guidance from a professional tax consultant in Vietnam helps businesses stay compliant with Vietnam income tax, reduces risk of penalties, and ensures all filings to the tax department are accurate and timely.
4. Role of Tax Consultants in Ensuring Accurate and Compliant Filings
Tax consultants in Vietnam play a key role in helping businesses maintain accurate and compliant tax records during month-end and quarter-end filings. Their work goes beyond simply preparing documents; they guide companies step by step to ensure that all financial data is properly reconciled and verified.
During this process, tax consultants focus on:
- Reviewing input and output VAT to ensure proper deduction and reporting.
- Checking personal income tax (PIT) calculations and payroll deductions.
- Reconciling corporate income tax (CIT), Foreign Contractor Tax (FCT) prepayments with actual revenue.
- Examining supporting documents to prevent missing invoices or non-deductible expenses.
In addition, tax consultants provide strategic advice on implementing internal procedures, keeping the company updated with the latest Vietnam income tax regulations, and standardizing accounting and tax processes. This proactive guidance reduces the risk of errors, fines, and audits, while building a reliable system that ensures transparency and smooth month-end and quarter-end tax compliance.
5. Vina TPT’s Professional Tax Filing and Compliance Support
Vina TPT supports businesses to fully perform their monthly/quarterly tax obligations with standardized procedures:
- Check and evaluate the validity of documents.
- Compare accounting and tax data to ensure no discrepancies.
- Support VAT, PIT declaration, invoice and CIT, FCT reporting according to regulations.
- Monitor deadlines and make electronic declarations on time.
- Representatives work with the tax department when explanations are needed.
- Accompanying long-term tax compliance consulting for FDI & SME enterprises.
Contact Vina TPT today for detailed guidance and to ensure full compliance with tax obligations in Vietnam.


