Legal Tax Optimization for Individuals and Freelancers: Keep More Money Without Breaking the Law

There's a clear boundary that every taxpayer should understand: tax evasion is illegal, but tax optimization is your right. Tax evasion means hiding income and falsifying declarations; tax optimization means properly and fully utilizing the exemptions and deductions the law allows so you don't overpay by a single dong. This article focuses on the second approach — completely legal.

Foundation principle: declare correctly and completely

Paradoxically, most Vietnamese don't overpay taxes due to sophisticated tricks, but because they miss simple deductions they're entitled to. Legal tax optimization starts with fully declaring what the law already permits.

For salaried employees

1. Register all eligible dependents. This is the most overlooked major deduction. Each eligible dependent reduces taxable income by 6.2 million đồng/month (2026 rate). Young children, parents past working age without income, non-working spouse — register them properly and on time.

2. Leverage voluntary pension funds. Contributions to voluntary pension funds are deductible up to 1 million đồng/month (12 million/year), reducing current taxes while building retirement savings — "killing two birds with one stone" (see separate article in the Retirement series).

3. Declare charitable, educational, and humanitarian contributions. Deductible from taxable income if you have valid documentation from licensed organizations.

4. Understand tax-exempt allowances and subsidies. Certain items like mid-shift meal allowances (within limits), business travel expenses, uniforms... may not count as taxable income per regulations — discuss with HR to structure income reasonably and legally.

5. Don't skip tax finalization when you're due a refund. If more was withheld than your actual annual tax liability, filing for finalization is how you get your own money back.

For freelancers and those with occasional income

This group has unique characteristics and often loses out if they don't understand the law:

1. Understand the 10% withholding mechanism for occasional income. When receiving one-time fees from places where you don't have a long-term employment contract (or contracts under 3 months), the payer typically withholds 10% if the payment exceeds the specified threshold. This is only a withholding — if your total annual income is below the taxable threshold, you can get a refund when filing. Don't leave this money on the table.

2. Consider your business structure when income is substantial. When income from independent activities grows large and stable, consider forms like household business registration — each model has different tax calculations and obligations. Compare carefully (see Household Business series) and consult an expert before deciding, because the wrong choice can make you pay more.

3. Keep books and income documentation. Both for proper declaration and as proof of income when you need loans or other procedures.

4. Separate personal and business finances. Using a separate account for business cash flow makes declaration much more transparent and easier.

Boundaries you cannot cross

Legal tax optimization stops at exactly what the law permits. The following are legal violations that can result in back taxes, heavy fines, even criminal prosecution:

• Hiding income, not declaring income sources.
• Falsely claiming dependents, fabricating deduction documents.
• Recording real estate or asset sale prices lower than actual to reduce taxes.
• Creating fake invoices or documents.

The difference is very clear: optimization is using the law, tax evasion is circumventing/violating the law.

The right mindset about taxes

Paying taxes fully and legally is an obligation and also part of building a transparent financial record — something increasingly important when you want loans, business expansion, or to prove financial capacity. The goal isn't to avoid, but to not overpay what the law already allows you to keep.

Note: deduction amounts, thresholds, and regulations may change per new guidance documents; check updated information or consult a tax expert before applying.

Want to review whether you're overpaying taxes and how to optimize legally? Ask [Sirifin's AI advisor](/vi/ai-advisor), or [book an appointment with a tax expert](/vi/advisors) for advice tailored to your specific situation.

Content is for financial information and education purposes, not tax or legal advice for specific cases.