Marriage to a US citizen doesnu2019t by itself allow you to apply for an EAD or renew it. However, after marriage, the two of you can file I-130 and I-485 for Adjustment of Status for you to become a US permanent resident. It is free to file I-765 for an EAD and/or I-131 for Advance Parole for I-485 applicants. This is true no matter if you file them together with I-485 or afterwards. It is also free to renew an I-485-based EAD or AP for as long as your I-485 is pending. Note that an I-485-based EAD would not be a renewal of your OPT EAD, but rather a new EAD in a new category.