Oasdi Max 2024 Withholding. The oasdi tax rate for wages paid in 2024 is set by statute at 6.2 percent for employees and employers, each. Oasdi tax is a flat rate of 12.4%, split evenly between employers and employees.
Oasdi tax is a flat rate of 12.4%, split evenly between employers and employees. For 2024, the social security wage cap will be $168,600, and social security and supplemental security income (ssi) benefits will increase by 3.2 percent.