2026 National Pension Back Payments: How Much Do Contributions Differ When Applying in November vs. December?
Applying for retroactive National Pension contributions (back payments) in November rather than December of 2026 may result in different contribution amounts. If the payment deadline falls in December after an application in November, the contribution rate is 9.5%. If the payment deadline falls in January 2027 after an application in December, the rate is 10%. For a standard monthly income of KRW 1,000,000 and 60 months of back payments, the difference is KRW 300,000.