What Base Salary Is and How to Calculate Take-Home Pay

Key Takeaways

• Base salary is the fixed income an employee receives by agreement, independent of sales or business results, and is often used interchangeably with basic salary.
• Base salary is usually stated as gross, before deductions, and serves as the basis for calculating social insurance and personal income tax.
• Base salary does not include insurance; rather it is the basis for it, with the employee portion deducted from it and the employer portion paid on top.
• For employers, a reasonable base salary must be above the regional minimum wage, typically 60 to 70% of the total rewards package, and must account for the employer’s insurance cost.

For employees, understanding base salary correctly means knowing exactly what they will receive after insurance and tax. For employers, setting base salary right directly affects insurance compliance cost, the HR budget, and the ability to retain people. In 2026, when the regional minimum wage, the 2024 Law on Social Insurance, and new personal deduction levels all change at once, understanding the nature of base salary matters more than ever. This article moves from the definition, to whether base salary is gross or net and whether it includes insurance, how it differs from variable pay, and how employers set a reasonable level.

What Base Salary Is

Base salary is the fixed income an employee receives regularly under their contract, unchanged by sales, performance, or business results. In practice, base salary is often used interchangeably with basic salary. As Talentnet defines it in its salary survey framework, base salary is the foundation of any pay package, the fixed amount an employee receives, and the basis for comparing pay levels across companies.

The key to understanding base salary is to place it next to its opposite, variable pay. Base salary is the guaranteed portion, paid for doing the job under the contract. Variable pay is the fluctuating portion tied to results, including performance bonuses, commissions, and business bonuses. A person’s total income is usually base salary plus variable pay plus other benefits.

This distinction is not merely academic. For employees, base salary is the income they can rely on for budgeting or to prove income when borrowing, so a low base with high variable pay means less stable income. For employers, base salary is a fixed monthly cost commitment, unlike variable pay which flexes with results.

Is Base Salary Gross or Net, and Does It Include Insurance

These are the two most confusing questions, and the answers are closely linked.

Gross vs net. Gross salary is total income before mandatory deductions. Net salary is what is actually received after deducting the employee’s social insurance contribution and personal income tax. Base salary, when stated in a contract, is most commonly stated as gross, and that is also the figure used as the basis for calculating insurance and tax. The two sides can still agree on a net figure, but then the employer must gross it up to meet insurance and tax obligations. In other words, base salary is not automatically net. For employees, the key when negotiating is to clarify whether the figure discussed is gross or net, because the same headline number can differ significantly after deductions. For employers, committing to a net figure means absorbing all the movement in tax and insurance, so the real cost can exceed expectations when rules change.

Does base salary include insurance. Not in the sense of an add-on. Base salary is the basis for calculating insurance, but does not itself contain the insurance amount. Under current rules, total mandatory insurance is 32% of the salary base, of which the employee pays 10.5%, comprising 8% social insurance, 1.5% health insurance, and 1% unemployment insurance. This 10.5% is deducted directly from the employee’s gross salary. The employer pays a further 21.5% on top, outside the employee’s salary.

A worked example shows the flow from gross base salary to net take-home pay, assuming an employee with no dependents and a base salary of 22,000,000 VND per month.

Step	Amount
Base salary (gross)	22,000,000đ
Less employee insurance (10.5%)	2,310,000đ
Income before personal deduction	19,690,000đ
Less personal deduction (self)	15,500,000đ
Taxable income	4,190,000đ
Personal income tax (first bracket, 5%)	209,500đ
Net take-home pay	19,480,500đ

This example is illustrative of how the money flows; actual figures vary with the number of dependents, allowances, and specific circumstances. The point to remember is that gross base salary is the starting point, and employee insurance and tax are deducted step by step to reach net pay.

The core principle. Gross base salary is the basis for calculating obligations, while net salary is what reaches the pocket. When negotiating pay, state clearly whether you mean gross or net to avoid misunderstanding.

How Base Salary Differs from Variable Pay

Clearly separating these two parts helps employees understand their income and helps employers design a transparent pay policy.

Criterion	Base salary	Variable pay
Nature	Fixed, agreed in advance in the contract	Fluctuates with results or performance
Examples	Basic salary per the contract	KPI bonus, commission, business bonus
Stability for the employee	High, secures a floor of income	Lower, depends on results
Role	A safe income foundation	A lever to drive motivation
Relation to insurance	The base for mandatory insurance	Depends on nature, may be subject to insurance if paid fixed and regularly

The line between salary and bonus is not always clear. Under the 2019 Labor Code, a bonus is an amount the employer pays based on business results or the level of job completion. A common example is a target bonus paid evenly every month at a near-fixed amount. Despite the name, if it is stable and tied to each pay period, it can be treated as part of salary and subject to insurance. By contrast, a bonus genuinely tied to year-end business results has a clearer variable nature. This is a point employers need to weigh carefully when designing the variable pay portion.

How Employers Set a Reasonable Base Salary

For employers, setting base salary is not just picking a number, but balancing legal compliance, market competitiveness, and cost. The four principles below give direction.

Not below the regional minimum wage

Base salary for a person working full normal hours in normal conditions cannot be lower than the regional minimum wage. From 1 January 2026, under Decree 293/2025, the monthly minimum wage rises by an average of 7.2% as follows.

Region	Monthly minimum wage	Hourly
Region I	5,310,000đ	25,500đ
Region II	4,730,000đ	22,700đ
Region III	4,140,000đ	20,000đ
Region IV	3,700,000đ	17,800đ

The applicable region is determined by where the employer operates, so the same role in two different areas can have a different floor.

Balance the base salary share in the total package

A base salary that is too low makes hiring hard and lowers the insurance base, while one that is too high raises fixed cost and shrinks room for performance pay. Under the framework Talentnet suggests for 2026, a balanced package typically allocates base salary at about 60 to 70% to ensure compliance with the insurance base, variable bonus at 15 to 20% to tie to results, non-taxable benefits at 10 to 15% to optimize take-home pay, and career development at 5 to 10%. A temptation to avoid is setting base salary very low and topping up with many allowances to reduce insurance contributions. This creates compliance risk, because regulators increasingly cross-check salary, tax, and insurance data, and a low base also reduces the employee’s own long-term entitlements.

Cost the real labor expense correctly

The real cost of a position does not stop at the base salary figure. The employer also pays a further 21.5% insurance on the salary base. When planning the HR budget, this must be added in to reach the true total labor cost, rather than looking only at the salary in the contract.

Reference the market through salary surveys

To know whether a base salary is competitive or outdated, the most reliable way is to compare against market data. The Talentnet-Mercer Total Remuneration Survey, aggregating data from 606 multinational companies and 72 domestic companies in Vietnam, gives employers a benchmark to set pay right, avoiding paying too little and losing people or too much and inflating cost.

Conclusion

Base salary is the foundation of income, the guaranteed portion that both employees and employers need to understand correctly. For employees, knowing gross base salary, the deductions, and net take-home pay avoids false expectations. For employers, setting base salary above the legal floor, at the right share, and with full insurance cost accounted for is the condition for being both compliant and competitive.

Amid many changes to pay, insurance, and tax rules in 2026, reviewing the pay structure is essential. Talentnet works with companies through its salary structure consulting and the Talentnet-Mercer salary survey to design a base salary and rewards structure that is both compliant and able to retain talent.

Frequently Asked Questions

Can probation pay be lower than the official base salary?

Yes, but with a limit. Under the 2019 Labor Code, probation pay is agreed by both sides but must be at least 85% of the pay for that job. So probation base salary can be lower than the official level, but not below this 85% threshold.

Can base salary be stated as net in the contract?

Yes, the two sides can agree on a net figure. However, the employer must still convert it to gross to calculate and pay insurance and tax as required. To avoid disputes, the contract should state clearly whether the figure is gross or net and how the deductions are handled.

Can base salary be lower than the regional minimum wage?

No, if it is the pay for an employee working full normal hours and completing the job. The regional minimum wage under Decree 293/2025 is a mandatory floor, and an employer paying below it violates the rules.

Are base salary and basic salary the same thing?

In practice, the two terms are often used interchangeably to mean the fixed contractual income. Basic salary is the more standard term in official documents and salary surveys, while base salary is the more common phrasing in everyday conversation.

How is base salary calculated when leaving mid-month?

Usually base salary is prorated by the actual days worked in the month, based on the agreed salary divided by the standard working days. Variable pay such as bonuses depends on the company’s policy. Employees should check the pay policy and contract for the exact method.