Vietnam caps daily overtime at four hours, monthly at 40 hours, and annual at 200 hours—or 300 for qualifying manufacturing sectors. These limits under Labor Code 2019 Article 107 are among the most actively enforced provisions during labor inspections of FDI companies, particularly in industrial zones across Bac Giang, Binh Duong, and Long An. The financial exposure is real: overtime pay rates reach 390% of regular wages for night work on public holidays, and violations carry fines up to VND 100 million plus mandatory back-pay with interest. Understanding the three-tier limit structure and the industry-specific exceptions determines whether overtime becomes a workforce flexibility tool—or a compliance liability.
Standard Working Days and Hours
Choosing Your Work Week: Fixed Days vs Actual Working Days
Labor Code 2019 governs work week arrangements through two provisions: Article 105 sets the ceiling at 8 hours per day and 48 hours per week; Article 111 requires at least one rest day per week (minimum 24 consecutive hours), preferably Sunday. Within these boundaries, employers make two key decisions.
First — fixed or actual working days. Under Decree 145/2020 Articles 54–55, employers choose whether to calculate daily and hourly wages using a fixed number of working days per month (constant year-round) or the actual working days in each calendar month (varies by month). This choice directly affects overtime pay calculations — see the hourly wage section below.
Second — if using fixed days, how many days per week. Most FDI companies adopt one of three arrangements:
| Arrangement | Schedule | Weekly Hours | Rest Day | Typical Use |
|---|---|---|---|---|
| Fixed 5-day | Mon–Fri, 8h/day | 40 hours | Sat + Sun | Office, professional services, tech |
| Fixed 6-day | Mon–Sat, 8h/day | 48 hours | Sunday only | Manufacturing, retail, hospitality |
| Shift-based | Rotating shifts | ≤48 hours | Rotating (≥1 day/week) | 24/7 factories, utilities |
The schedule choice carries direct financial consequences. Under a 5-day arrangement, Saturday work triggers 200% overtime pay because Saturday is a designated rest day. Under a 6-day arrangement, Saturday is a normal working day paid at 100% — overtime rates apply only when hours exceed the daily or weekly ceiling. For a 100-person factory where 30 employees work Saturdays regularly, the difference between a 5-day and 6-day designation can exceed VND 100 million annually in overtime costs alone.
Your work week arrangement must be specified in the employment contract and registered in your internal labor regulations (ILR) filed with DOLISA under Labor Code Article 118. Changing from a 6-day to 5-day schedule mid-year requires employee consultation and ILR amendment — you cannot retroactively reclassify rest days.
Working Hours Framework
Standard working hours are capped at eight hours per day and 48 hours per week under Article 105. Normal working hours run from 6:00 AM to 10:00 PM; any hours worked between 10:00 PM and 6:00 AM qualify as night work and trigger a separate 30% premium under Article 106.
Employers may organize work using flexible weekly schedules, but total hours—including overtime—cannot exceed 12 hours in any single day. This 12-hour ceiling applies regardless of wage arrangement, industry classification, or employee agreement. FDI companies operating shift-based manufacturing often set 8-hour rotations specifically to maintain overtime headroom within this daily cap.
Employees in hazardous or dangerous occupations listed under the Ministry of Labor’s classification receive reduced working hours (6 hours/day, 36 hours/week) under Article 105(3)—common in chemical processing, mining, and certain electronics manufacturing involving toxic solvents. These employees earn the same wage as 8-hour workers; reduced hours are a mandatory protection, not a pay reduction.
For a complete list of paid days off that affect overtime scheduling, see Vietnam public holidays and leave entitlements.
Overtime: Limits, Pay Rates, and Calculation
Daily, Monthly, and Annual Caps
The overtime limit system operates in three tiers, and exceeding any single tier constitutes a violation—even if the other two tiers remain within limits.
Daily limit: Overtime cannot exceed 50% of normal working hours per day, effectively capping overtime at four hours when the standard eight-hour shift applies. Combined with regular hours, no employee may work more than 12 hours in a single day under Article 107 of Labor Code 2019.
Monthly limit: The monthly cap is 40 hours under Article 107(2) of Labor Code 2019. During 2022–2024, Resolution 17/2022/UBTVQH15 temporarily raised this to 60 hours per month as a COVID-19 recovery measure—that temporary resolution expired on December 31, 2024 and the cap has reverted to 40 hours. The 40-hour limit requires employee consent; labor inspectors specifically request evidence of written agreement during audits—verbal consent does not satisfy the requirement.
Annual limit: Most industries face a 200-hour annual cap. Article 107(3) permits expansion to 300 hours for specific sectors including:
- Textiles, garments, and footwear
- Electronics manufacturing
- Agriculture, forestry, and aquaculture processing
- Electricity generation and supply
- Telecommunications and refinery operations
- Water supply and drainage services
Employers accessing the 300-hour regime must file written notice to their provincial Department of Labor, Invalids and Social Affairs (DOLISA) specifying the business justification, affected employee list, and planned overtime schedule. A separate exception exists for positions requiring specialized skills unavailable in the labor market, though this justification faces increasing scrutiny as Vietnam’s workforce develops.
For manufacturing FDI, the annual cap—not the daily or monthly limit—typically becomes the binding constraint. A plant consuming 50 hours/month during peak season exhausts 300 annual hours by month six, leaving zero overtime capacity for the remainder of the calendar year.
Who Cannot Work Overtime
Even within legal caps, certain employees are prohibited from overtime or night work under Labor Code 2019:
| Protected Group | Restriction | Legal Basis |
|---|---|---|
| Pregnant employees (from month 7; month 6 in remote areas) | No OT, no night work — unless employee consents | Article 137 |
| Employees nursing children under 12 months | No OT, no night work — unless employee consents | Article 137 |
| Minor workers (under 18) | Restricted OT hours, no night work in most occupations | Articles 146–147 |
| Employees with disabilities | No OT if it affects their health condition | Article 160 |
Assigning overtime to these groups without documented consent is a standalone violation — separate from exceeding hourly caps. For full employer obligations during pregnancy and nursing, see maternity and paternity leave compliance.
Pay Rates and How to Calculate Overtime Wages
Overtime pay rates differ based on when the work occurs, with multipliers ranging from 150% to 390% under Article 98 of Labor Code 2019 and Articles 55–57 of Decree 145/2020/ND-CP. The night allowance (30%) compounds on top of overtime rates:
| When | Day Rate | Night OT Rate |
|---|---|---|
| Weekday | 150% | 210% |
| Weekend (rest day) | 200% | 270% |
| Public holiday / paid leave | 300% | 390% |
Step 1 — Calculate normal hourly wage (Decree 145/2020/ND-CP Articles 54–55):
Normal hourly wage = actual monthly salary for the job ÷ total normal working hours in the month
Decree 145 Article 55(1)(a) permits two methods for determining the denominator, and the enterprise chooses one:
| Method | Denominator | Hourly Rate | Best For |
|---|---|---|---|
| Fixed standard | Declared schedule × 8h (e.g., 22 days × 8h = 176h) | Constant every month | Simplicity, payroll consistency |
| Actual working hours | Actual hours worked that month (varies by calendar) | Changes monthly | Precision, avoids overpaying short months |
Both methods are capped at the normal working hours ceiling declared in the enterprise’s work schedule—no more than 48 hours/week under Article 105. The numerator excludes overtime pay, night premiums, holiday pay, bonuses, and non-wage benefits (meal allowances, transport, housing support).
Step 2 — Apply the overtime formula:
Overtime wage = normal hourly wage × applicable rate × overtime hours worked
Worked example (fixed method): An employee earning VND 15,000,000/month on a 5-day week (22 days × 8 hours = 176 hours):
| Calculation | Per Hour | |
|---|---|---|
| Normal hourly wage | VND 15M ÷ 176 | VND 85,227 |
| Weekday OT (150%) | VND 85,227 × 150% | VND 127,841 |
| Weekend OT (200%) | VND 85,227 × 200% | VND 170,454 |
| Holiday OT (300%) | VND 85,227 × 300% | VND 255,681 |
Holiday pay clarification: Public holidays are paid days off—employees already receive their regular daily wage. When they work on a holiday, they receive that regular pay plus the 300% overtime rate. The effective employer cost for holiday work is therefore 400% of hourly wage (100% base + 300% OT). This distinction is the most common payroll misconfiguration for FDI companies. Confirm current holiday dates in Vietnam public holidays and leave entitlements.
Night OT allowance — how the 390% rate works: The 390% maximum applies to night overtime on public holidays. It comprises three components: 300% (holiday OT base) + 30% (standard night allowance) + 60% (the 20% × 300% night OT adjustment per Article 98(3) of Labor Code 2019). Most payroll systems require manual configuration to apply these compounding allowances correctly—default settings frequently understate the multiplier.
For piece-rate employees, the same percentage rates apply to the unit price of products produced during regular working hours. The base unit price, not a discounted or adjusted rate, serves as the calculation baseline.
Overtime compensation feeds directly into gross-to-net payroll calculations—see employer payroll costs and gross-to-net calculation for the SHUI deduction impact.
Industry-Specific Rules for Manufacturing FDI
The 300-hour annual cap is not available to all employers. Article 107(3) of Labor Code 2019 enumerates qualifying sectors, and industry classification determines eligibility—not employer preference.
A multinational operating both a garment factory and a corporate services office in Vietnam faces different overtime ceilings at each facility. The garment factory qualifies for 300 hours; the services office is limited to 200. Each establishment operates independently for overtime compliance purposes.
Employer obligations for the 300-hour regime:
- Confirm sector eligibility against the Article 107(3) enumeration
- Obtain written employee consent for the extended arrangement
- File written notice to provincial DOLISA before overtime begins
- Maintain documentation demonstrating business demand justification
The “specialized skills” exception under Article 107(3)(c) applies when work requires expertise not available in the local labor market—relevant for semiconductor, advanced manufacturing, and AI-related operations. However, this exception requires ongoing justification; as Vietnam’s workforce develops, employers may lose eligibility and must adjust overtime arrangements downward.
Practical note: Companies using the fixed-day denominator (e.g., always 26 days for a 6-day schedule) should be aware that shorter months like February produce a lower hourly rate—and therefore lower OT pay—than the actual-hours method. This gap is visible on payslips and frequently questioned by employees, union representatives, and labor inspectors.
Penalties for Overtime Violations
Penalties for overtime violations scale with the number of affected workers under Decree 12/2022/ND-CP:
| Violation | Workers Affected | Fine Range |
|---|---|---|
| Exceeding daily/monthly/annual limits | 1–10 | VND 10–20M (~USD 400–800) |
| 11–50 | VND 20–40M (~USD 800–1,600) | |
| 51–100 | VND 40–60M (~USD 1,600–2,400) | |
| 101+ | VND 60–100M (~USD 2,400–4,000) | |
| Underpayment of OT compensation | 1–10 | VND 5–10M (~USD 200–400) |
| 11–50 | VND 10–20M (~USD 400–800) | |
| 51–100 | VND 20–30M (~USD 800–1,200) | |
| 101+ | VND 30–50M (~USD 1,200–2,000) | |
| Inadequate overtime records | Per violation | VND 1–20M (~USD 40–800) |
Beyond the administrative fine, employers must pay the full amount of underpaid overtime compensation plus interest calculated at the highest demand deposit rate of state commercial banks. For a 200-person manufacturing facility with systematic overtime underpayment, combined exposure—fines plus back-pay with interest—can reach several hundred million VND.
Overtime violations also create exposure to employee-initiated labor dispute proceedings, where courts can order additional compensation for damages.
Practical Compliance Checklist
Five actions that reduce overtime violation risk for FDI employers:
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Configure payroll correctly — verify that your system distinguishes weekday, weekend, and public holiday overtime rates, including nightwork stacking. Default settings frequently understate multipliers.
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Obtain written consent — collect documented employee agreement before assigning any overtime. Consent must be filed chronologically, not retroactively.
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File DOLISA notice — submit written notification if accessing the 300-hour annual regime. Include sector justification, employee list, and planned schedule.
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Track annual accumulation — monitor per-employee overtime hours against the 200/300-hour annual ceiling monthly. Automated alerts at 80% and 90% thresholds prevent year-end surprises.
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Audit annually — review overtime records against payroll disbursements before each annual HR compliance calendar cycle to identify discrepancies before inspectors do.
Overtime compliance feeds into broader labor law requirements including employment contracts and social insurance contribution obligations.
Indochina Link Vietnam supports FDI employers with payroll compliance audits and overtime configuration reviews. Contact our certified CPAs and HR compliance team—Steven Nguyen and David Nguyen—to assess your current overtime exposure.
Disclaimer: This content provides general information about Vietnamese labor law and does not constitute legal advice. Consult qualified legal counsel for specific compliance guidance. Information current as of March 2026.