Social Security Max 2025 Withholding Amount. 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 wage base has increased to $176,100 for 2025.

Both employees and employers will continue to contribute at a rate of 6.2% on wages up to this threshold. For 2025, the social security tax limit is $176,100.