HPI visa holders enjoy a number of flexible benefits, including being able to work for any employer (even those without a sponsor licence) in any role, be self-employed, do voluntary work, and travel freely in and out of the UK. Importantly, those granted an HPI visa can also bring their dependant spouse and children members to join them in the UK. Once in the UK, HPI visa holders can stay for up to 2 years or 3 years if they hold a PhD or other doctoral qualification.