Vietnam Social Insurance Updates: Adjustment Coefficients for 2026

The Vietnam Social Insurance (VSI) has recently announced updates to the adjustment coefficients used to calculate social insurance benefits, effective February 2026. These adjustments, detailed in Official Document 340/BHXH-CSXH, impact individuals who have contributed to the social insurance system over the years, with the most significant changes applying to those who began contributions before 1995.

Key Changes and Adjustment Coefficients

The adjustment coefficients are designed to account for changes in the cost of living and ensure fair benefit calculations. The highest adjustment coefficient, 5.81, applies to individuals whose social insurance contributions began before 1995. This coefficient gradually decreases with each subsequent year, as outlined below:

• Before 1995: 5.81
• 1995: 4.91
• 1996: 4.65
• 1997: 4.50
• 1998: 4.18
• 1999: 4.01
• 2000: 4.07
• 2001: 4.09
• 2002: 3.94
• 2003: 3.81
• 2005: 3.27
• 2006: 3.05
• 2007: 2.81
• 2008: 2.29
• 2009: 2.14
• 2010: 1.96
• 2011-2014: 1.65 – 1.36
• 2015-2018: 1.36 – 1.23
• 2019: 1.20
• 2020: 1.16
• 2021: 1.14
• 2022: 1.11
• 2023: 1.07
• 2024: 1.03
• 2025 & 2026: 1.00

Calculation Methodology

According to Decree 159/2025/NĐ-CP, the salary adjustment coefficient is calculated based on the average annual consumer price index. The formula used is:

Salary adjustment coefficient = (Average consumer price index of the year immediately preceding benefit receipt) / (Average consumer price index of the year of contribution)

Both indices are calculated using the base year of 1994. The resulting coefficient is rounded to two decimal places, with a minimum value of 1.

Document Details

These updates are outlined in Công văn 340/BHXH-CSXH, issued by the Vietnam Social Insurance on February 5, 2026, and signed by Chu Mạnh Sinh. Further details can be found on LuatVietnam.vn.

Implications for Beneficiaries

These adjustments will impact the calculation of various social insurance benefits, ensuring that payments reflect the changing economic landscape and provide adequate support to beneficiaries. Individuals with questions or concerns are encouraged to contact the Vietnam Social Insurance directly or consult with a qualified financial advisor.