Oasdi Tax Rate 2025. In 2025, that number is $168,600. The oasdi tax rate for wages paid in 2025 is set by statute at 6.2 percent for employees and employers, each.

The social security tax rate is 6.2% each for the employee and employer, for a total of 12.4% as of 2025. Keep an eye on the oasdi limit—it’s your earnings ceiling for social security taxes.