Introduction to Tax: 10 practice questions with answers
Main types of tax, confirmed tax rates and the first calculation 'tax base × tax rate'.
10 questionsabout 15 minutes5 multiple choice · 5 calculationsFor: Tax learners, students, new business owners
Machine-translated from the Vietnamese original; under editorial review.
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Value-added tax (VAT) belongs to which group of taxes?
- A. Direct tax — levied directly on the income of the taxpayer
- B. Fee — payment for a specific administrative service
- C. Indirect tax — the seller adds it to the selling price, declares and pays it on behalf of the buyer
- D. Contribution payable only by large enterprises
Show answer and explanation
Answer: C. Indirect tax — the seller adds it to the selling price, declares and pays it on behalf of the buyer
VAT is added to the selling price: the final buyer bears the tax, while the seller declares and pays it on their behalf. Personal income tax and corporate income tax work the opposite way — levied directly on the income of the taxpayer themselves, so they are called direct taxes.
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Law on Value-Added Tax No. 48/2024/QH15 (effective from 1 July 2025) prescribes which tax rates?
- A. 0%, 5% and 10%
- B. 5%, 10% and 15%
- C. Only one rate of 10%
- D. 0%, 8% and 10%
Show answer and explanation
Answer: A. 0%, 5% and 10%
The Law has three rates: 0%, 5% and 10%. The 8% rate often seen on invoices is due to a 2% reduction policy for certain groups of goods and services under a separate National Assembly resolution with a time limit — it is not a fourth rate under the Law. Before applying the reduced rate, check the application period for the filing period in question.
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Under Law on Corporate Income Tax No. 67/2025/QH15, what is the standard tax rate?
- A. 10%
- B. 15%
- C. 17%
- D. 20%
Show answer and explanation
Answer: D. 20%
20% is the standard rate. The Law also provides two lower rates based on annual total revenue: 15% for enterprises with revenue not exceeding VND 3 billion and 17% for enterprises with revenue above VND 3 billion to VND 50 billion. The Law takes effect from 1 October 2025 and applies from the 2025 tax period.
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Suppose in 2026, Company A has annual total revenue of VND 2 billion, taxable income of VND 300 million and no incentives. What is the corporate income tax payable?
Give the answer in VND million.
Show answer and explanation
Answer: VND 45 million
Annual total revenue not exceeding VND 3 billion, so the 15% rate applies: VND 300 million × 15% = VND 45 million. Revenue is used only to select the tax rate; the multiplication is applied to taxable income — multiplying revenue by the tax rate is incorrect and is the most common mistake.
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Suppose Company B has annual total revenue in 2026 of VND 20 billion, taxable income of VND 1 billion, no incentives. What is the corporate income tax payable?
Give the answer in VND million.
Show answer and explanation
Answer: VND 170 million
Revenue above VND 3 billion to VND 50 billion, so 17% applies: VND 1,000 million × 17% = VND 170 million. If total revenue exceeds VND 50 billion, the standard rate of 20% applies; the same income would then be VND 200 million.
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Suppose Mr C sells shares at a selling price of VND 200 million. Personal income tax on securities transfer calculated at 0.1% on the selling price is how much?
Give the answer in VND.
Show answer and explanation
Answer: VND 200,000
VND 200,000,000 × 0.1% = VND 200,000. Tax is calculated on the selling price of each transfer, regardless of whether that transfer is profitable or at a loss — beginners often think tax is payable only when there is a gain.
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Suppose Ms D sells a house to an outsider, transfer price VND 3 billion, not exempt. Personal income tax of 2% on the transfer price is how much?
Give the answer in VND million.
Show answer and explanation
Answer: VND 60 million
VND 3,000 million × 2% = VND 60 million. Tax of 2% is calculated on the transfer price, not on the gain. Recording a contract price lower than the actual price to reduce tax is false declaration and carries the risk of back assessment and future disputes.
Related tool: Estimate real estate tax and fees on ThuePhi.com
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Suppose the price used to calculate the registration fee for a house is VND 2 billion. Registration fee for real estate at 0.5% is how much?
Give the answer in VND million.
Show answer and explanation
Answer: VND 10 million
VND 2,000 million × 0.5% = VND 10 million. Registration fee is a separate item, not personal income tax; the person registering the transfer pays it when completing the procedures. The price used for the fee may differ from the contract price, so ask the tax authority in the location of the property before budgeting.
Related tool: Estimate real estate tax and fees on ThuePhi.com
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From 1 July 2025, the tax authority system is organized at which three levels?
- A. General Department of Taxation — Provincial Department of Taxation — District Tax Sub-office
- B. Department of Taxation — Provincial tax office — Grassroots tax office
- C. Ministry of Finance — Provincial Department of Finance — District Finance Division
- D. Department of Taxation — Regional Tax Sub-office — Commune Tax Team
Show answer and explanation
Answer: B. Department of Taxation — Provincial tax office — Grassroots tax office
From 1 July 2025, the country has 34 provinces and cities, no longer a district level; the tax authority comprises the Department of Taxation, provincial tax offices and grassroots tax offices. Old names such as Tax Sub-office still appear on earlier documents — when dealing with matters now, find the correct grassroots tax office managing the area.
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Under the Law on Accounting, accounting documents used directly to record in books and prepare financial statements must be kept for at least how long?
- A. 2 years
- B. 10 years
- C. 5 years
- D. Until completion of the annual finalization for that year
Show answer and explanation
Answer: B. 10 years
At least 10 years. Invoices, payment documents, payroll sheets attached to journal entries all fall into this category. Electronic storage must also ensure retrievability; do not make it dependent on one employee's computer.
The questions use rules checked at the time of writing; calculation scenarios are hypothetical with round numbers. Before applying anything to a real filing, read the document in force or ask your managing tax office. TaxDatum.com is run by a private operator and is not a government portal. The Vietnamese original of this set is on HocThue.com.