To open a Lifetime ISA (LISA), you need to be aged at least 18 and under 40. Having opened a LISA account, you can keep paying in until the day before your 50th birthday.
If you’re 40 or older, you can’t open a LISA – unless you’re transferring in an existing LISA from another provider. You’ll be able to do this when transfers to AJ Bell Youinvest Lifetime ISAs are available later in 2017.
LISAs can only be opened by individuals. And you must ordinarily be a resident of the UK, a Crown employee working overseas, or a spouse or dependant of a Crown employee.