Money What is OASDI tax on my paycheck? Here’s why you and your employer pay this federal tax January 25, 2023January 31, 2023Clare Mulroy, USA TODAYComments Off on What is OASDI tax on my paycheck? Here’s why you and your employer pay this federal tax OASDI stands for Old-Age, Survivors and Disability Insurance. Commonly known as Social Security, OASDI is the 6.2% tax taken out of your paycheck.