Why Your National Pension Deduction Differs from Your Salary × 4.75%: How Standard Monthly Income Is Determined
In 2026, the employee contribution rate for workplace subscribers to the National Pension is 4.75%, but this does not mean that 4.75% is automatically multiplied by this month's gross salary to calculate the deduction. National Pension contributions are calculated by applying the contribution rate to the 'standard monthly income.' If your salary has recently increased or the composition of your allowances has changed, the National Pension deduction on your payslip may differ from a simple calculation. For a monthly salary of KRW 3,000,000, the employee contribution