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In-house or outsourced payroll? A 2026 comparison for businesses

By Nguyễn Quốc Trung — Deputy General Director · Updated 2026-08-18

Your company should outsource payroll when its workforce is large, fluctuates seasonally, or when you want to reduce the risk of miscalculating social insurance and personal income tax. Conversely, a business with few, stable employees and an accountant who keeps up with the rules can handle payroll in-house perfectly well. There is no single right answer for everyone — the choice depends on your size, how much your headcount changes, and your appetite for risk.

Here is a detailed comparison across five criteria to help you decide.

In-house payroll: when it fits

Doing payroll in-house means your accounting or HR team directly collects attendance data, calculates pay, deducts insurance and tax, and produces the payment sheet every month.

This approach fits when:

• The number of employees is small and changes little from month to month.
• The pay structure is simple, with few allowances, shifts, and overtime.
• The company already has a skilled payroll accountant who stays current with new regulations.
• You want payroll data to stay entirely internal, never shared outside.

Strengths: full control, no outsourcing fee, data kept under your direct supervision.

Weaknesses: dependence on a few individuals. When the person in charge resigns, takes leave, or falls ill, the whole payroll process can stall. The risk of error is also higher if the accountant cannot keep pace with constantly changing law.

Outsourced payroll: when it makes sense

Outsourcing [payroll services](/tinh-luong-thue-ngoai/) means the company hands the calculation and preparation of the payroll to a specialized provider. You still set your pay policy; the provider handles operations, reconciliation, and compliance.

This approach makes sense when:

• The workforce is large, with many pay groups, multiple shifts, and frequent overtime.
• Headcount fluctuates sharply by season — constant hiring and downsizing.
• You want to reduce insurance and tax errors and separate payroll data from the internal team for better confidentiality.
• The accounting department wants to focus on strategic finance rather than processing payroll every month.

Strengths: a specialized process, a backup when needed, regulatory updates handled on your behalf, and reduced dependence on any single individual.

Weaknesses: you must choose a reputable provider with a clear confidentiality commitment, and you have to standardize input data (attendance, contracts, allowances) for handover.

Five criteria to compare

1. Cost

Doing it yourself has no outsourcing fee but still carries hidden costs: the payroll accountant's salary, reconciliation time, and the cost of correcting and paying in errors. Outsourcing has a clear service fee, but it is usually fixed and easy to budget; the more employees you have, the lower the cost per head.

2. Accuracy and compliance

This is the biggest difference. Payroll ties directly to social insurance and personal income tax — two areas whose rules change constantly. A specialized provider tracks these changes daily, whereas an in-house accountant juggling many duties can easily miss them.

3. Data security

Payroll data is sensitive. When done in-house, leaks often come from inside (employees learning each other's pay). When outsourced, data is separated from the internal team and bound by a confidentiality agreement; what matters is choosing a provider with a serious security process.

4. Time and staffing

Calculating pay manually for hundreds of people each month takes a lot of time and tends to bottleneck at the pay-closing period. Outsourcing frees up internal resources to focus on higher-value work.

5. Scalability

When a company grows fast or opens branches across many provinces, the in-house model easily becomes overloaded. An outsourced service has ready-made processes to scale with headcount without hiring more accountants.

Why payroll is more complex in 2026

Several legal changes in 2026 make payroll require closer attention:

• New regional minimum wages under Decree 293/2025/ND-CP, effective from 01/01/2026: Region I is VND 5,310,000, Region II is VND 4,730,000, Region III is VND 4,140,000, and Region IV is VND 3,700,000 per month. These levels directly affect the insurance contribution floor and the way pay is calculated for many groups of workers.
• Social Insurance Law No. 41/2024/QH15, effective from 01/7/2025, together with Decree 158/2025/ND-CP guiding its implementation, change many points on who contributes and how much.

One notable change concerns part-time workers: an employee on a contract of one month or more who also has a monthly wage of at least the reference level of VND 2,530,000 falls under compulsory social insurance. Both conditions must be met together. For this group, the employer's contribution is 21.5%, equal to VND 543,950, and the employee's is 10.5%, equal to VND 265,650 — a total of VND 809,600 per person per month. If payroll overlooks this group, the company faces back-collection and penalties.

Correctly [formalizing labor](/hop-thuc-hoa-lao-dong/) and calculating insurance for special groups (part-time, seasonal, collaborators) is the part most prone to error when done in-house. If your company uses many seasonal workers, a [labor supply](/cung-ung-lao-dong/) service bundled with payroll can streamline both tasks at once.

How Nhan Kiet supports payroll

Nhan Kiet Human Resources Supply Co., Ltd (tax code 0308022768) has operated since April 2009 — now in its 17th year. Nhan Kiet serves more than 500 clients with over 40,000 workers across 34 provinces, supported by more than 200 operations staff. The company holds Labor Sub-leasing License No. 15/2019/SHCM and the ISO 9001:2015, ISO 45001, and ISO 14001 certifications.

With outsourced payroll, Nhan Kiet handles attendance reconciliation, pay calculation, insurance and tax deductions in line with current regulations, prepares the payment sheet, and safeguards payroll data. The company retains full authority over policy; the specialized team handles operations.

If your business is weighing in-house versus outsourced payroll, or needs advice for your specific situation, please get in touch:

• Nguyen Quoc Trung — Deputy General Director
• Phone: 0908 636 108 — Email: trungnguyen@nhankiet.vn
• Head office: Room 202, Building 57, 57 Le Thi Hong Gam, Ben Thanh Ward, Ho Chi Minh City — Tel: 028 3505 4224

Learn more about our [payroll outsourcing](/tinh-luong-thue-ngoai/) service, or the [EOR in Vietnam](/eor-vietnam/) solution if you need to hire workers before you have a legal entity.

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