@MarianaV said in Do FICA taxes cover RSUs earned abroad?:
I have one question regarding this as well:
If RSUs were granted while I was working overseas but vest after returning to the U.S., how does the IRS determine which portion is subject to FICA? Is the entire vesting value taxed, or only the part tied to my U.S. service period?
That’s a very valid concern. In the U.S., the IRS generally applies FICA on a prorated basis, taxing only the portion of RSU income tied to your U.S. workdays during the vesting period, not the entire grant value. Employer payroll reporting and tax treaties can impact how grants are handled, so it's essential to review your grant timeline closely.