Personal Income Tax Capital investment is a financial obligation that resident and non-resident individuals must fulfill when income is generated from the use of capital for profit. According to regulations... Circular 111/2013/TT-BTC Under the current Personal Income Tax Law, correctly determining the nature of income not only helps individuals comply with the law but also helps businesses optimize tax settlement and periodic tax reporting processes.
In the context of Vietnam's rapidly transforming economy, with the booming stock market and various forms of corporate investment, a thorough understanding of personal income tax on capital investments has become a mandatory requirement for all investors. Mastering the circulars and guiding documents from the General Department of Taxation will help taxpayers avoid unnecessary legal risks and late payment penalties during audits.
The nature and taxable income from capital investment.
Before delving into the calculation method, we need to clearly identify which income streams are classified as capital investments in order to apply the appropriate tax rate.

Define income from capital investments.
Income from capital investment is personal income received in the form of interest, dividends, or additional gains from contributing capital to economic organizations. By regulation, this income includes interest from loan contracts and interest on bonds.
Forms of taxable income in joint-stock companies
For the joint-stock company model, income subject to personal income tax The term "capital investment" is very specifically defined to encompass all transactions that generate economic benefits for shareholders:
- Interest rate on loans: Interest earned from lending to a joint-stock company under a civil/economic loan contract or agreement.
- Dividends: Profits after tax are distributed to shareholders from capital contributions in the form of cash or other benefits.
- Increased capital contribution value: The additional difference in the value of capital contributions received upon dissolution of a business or conversion of its operating model.
- Interest on securities: Income from interest on bonds, treasury bills, and other financial instruments issued to the market by joint-stock companies.
- Investing with non-monetary assets: Income received when contributing capital in kind, reputation, land use rights, or intellectual property.
- Income recorded as capital gains: Dividends paid in shares or retained earnings are reinvested to increase the charter capital.
Legal basis and formula for calculating personal income tax on capital investment.
The basis for calculating personal income tax on capital investments is based on taxable income, and the flat tax rate is uniformly stipulated for both resident and non-resident individuals in Vietnam.

Tax calculation formulas for resident and non-resident individuals.
The application of the tax calculation formula should be based on the individual's residency status at the time of receiving income to ensure the accuracy of the records. tax settlement.
| Taxpayer | Formula for calculating personal income tax on capital investment | Tax rate |
| Resident Individual | Taxable income x Tax rate | 5% |
| Non-resident individual | Total taxable income received from Vietnam x Tax rate | 5% |
Explain the ingredients in the formula.
In this context, taxable income from capital investment is the total value of taxable income that an individual actually receives or that is recorded as an increase in capital. The applicable tax rate is the flat rate 5%; the progressive tax rate schedule applied is not the same as for income from salaries and wages.
Time of determining taxable income from capital investment
Incorrectly determining the tax calculation period is the most common error leading to back taxes and late payment penalties during tax audits by authorities.

General principles regarding the timing of income payments.
Generally, the time of determining taxable income from capital investment is the time when the enterprise makes income payments to taxpayers. However, there are special cases that need to be considered based on the nature of the transaction.
Special cases regarding the timing of tax determination.
The law provides separate provisions for certain complex investment scenarios to ensure transparency in tax administration:
- Regarding the increased capital contribution value: The tax assessment time is when an individual actually receives income upon dissolution, merger, consolidation, or withdrawal of capital from a business.
- Regarding capital gains: Personal income tax on capital investment only arises at the time an individual transfers or withdraws capital from an organization.
- For dividends paid in shares: The point of determination is when the individual transfers the shares they previously received.
- Investing capital abroad: The tax calculation time is based on when the individual receives income in any form from organizations outside the territory of Vietnam.
In-depth analysis of personal income tax on capital investment in accounting practices.
In tax accounting, the accounting and deduction of personal income tax from capital investments requires meticulous attention to detail and a thorough understanding of the guidelines issued by the Ministry of Finance.
The responsibility of the income-paying business to deduct withholding tax.
The organization paying the income is responsible for deducting personal income tax from the individual's capital investment before payment. The business must prepare tax deduction certificates and declare them according to the form prescribed in Circular 80/2021/TT-BTC.
A practical example illustrating tax calculation.
Suppose individual A is a shareholder of a joint-stock company. In 2025, this individual receives 100 million VND in dividends and 50 million VND in loan interest.
- Personal income tax on investment dividends: 100,000,000 x 5% = 5,000,000 VND.
- Personal income tax on loan interest: 50,000,000 x 5% = 2,500,000$ VND. In total, the business must deduct 7.5 million VND before transferring the money to individual A.
Important notes to ensure accuracy in tax reporting.
To ensure the reliability and transparency of data, accountants need to continuously update themselves with official responses from local tax authorities.
Risks of not separating different types of income
Many people confuse income from capital investments (tax rate 5.%) with income from capital transfers (tax rate 2.0% on the difference or 0.1% on the sale price). This confusion can cause significant financial losses for investors.
Documents proving the source of funds and income
When providing tax consulting or tax settlement services, preparing a complete set of documents including capital contribution agreements, shareholder meeting minutes, and transfer documents is extremely important to protect the data before the auditing agency.
Conclude
Personal income tax on capital investment is a specialized area of knowledge requiring absolute precision in determining the timing and taxable revenue. Mastering these regulations not only helps individuals protect their financial interests but also enables businesses to build a transparent and robust tax reporting system in the face of any inspections by regulatory authorities.
If your business or you are an individual facing difficulties with tax declaration, settlement, or need solutions to optimize your taxes, MAN – Master Accountant Network is always ready to assist you. We provide a comprehensive package of services. auditing services, tax accounting, as well as tax consulting services In-depth expertise. With a team of experienced professionals, MAN is committed to assisting clients with tax settlement and preparation. tax reporting Accurate and timely action helps minimize risks and increase sustainable value for businesses.
Frequently Asked Questions about Personal Income Tax on Capital Investments
Is interest earned on bank savings deposits subject to personal income tax on capital investment?
According to current regulations, interest earned on deposits at credit institutions and banks by resident individuals is currently exempt from personal income tax.
If I receive dividends in the form of shares and haven't sold them yet, do I have to pay tax immediately?
No. You only have to pay personal income tax on investment income for these dividends at the time you sell (transfer) those shares.
Does the 5% tax rate apply to profit or to the total amount received?
The tax rate is applied to the total taxable income received, and related expenses cannot be deducted, unlike income from business activities.




