There are laws that limit the interest rate that you can be charged if you are an active duty servicemember (including those on active Guard or active Reserve duty) or a covered dependent. 

The Military Lending Act limits the amount that active duty servicemembers and covered dependents can be charged for consumer credit. Creditors needed to comply with a new rule implementing the Act starting on October 3rd, 2016, except for credit card accounts, which has a compliance date of October 3rd, 2017. Read more about the Military Lending Act.   

The Servicemembers Civil Relief Act (SCRA) limits the interest rate to 6% for active duty servicemembers for pre-service debt, that is, credit card balances that were incurred prior to active duty. Read more about the SCRA protections for credit cards and how you can request them.