Cost Of Living 2024 Social Security Increase 2024. The 2.5% increase in 2025 is smaller than 2024's 3.2% boost and 2023's 8.7%. Starting in january, the estimated average monthly retirement benefit will increase by 3.2%, or $59 a month, for 2024 โ from $1,848 to $1,907. When your january payment arrives, as well as in […]