Why do you need the date of birth for employees under 18 and over 65?

Current Kiwisaver legislation means that if someone is younger than 18 or older than 65 and wish to make Kiwisaver contributions then these do not form part of Employer Tax Credit available to the employer.

Also, if aged between 16 and 18 the employee may be on the New Entrants pay rate so we need to keep track of the total hours worked and period of employment.