B1-B2 duration


I have a question about duration of stay in USA on visitor visa. My mother will be coming to USA in June and will be staying for 2 months. After going back to India in August she will be coming back again to USA in Sept. My question is, how long she can stay in her 2nd trip? Is it 4 months (as 2 months already stayed in earlier trip June and July) or she can stay for 6 months irrespective of her 2 months stay in earlier visit?



Rule of thumb is to stay for not more than 6 months during rolling 12 month period. So she should not stay more than 4 months even if her I-94 is granted for a longer duration. It may hurt in long run if she stays longer than 4 months.