As an employee, you need to purchase personal accident insurance for your foreign domestic workers, minimum sum insured will be $40,000.
All employees need to security bond with work pass division of Ministry of Manpower. Under the bond, employees are required to put a deposit of $5,000 in the form of a Banker's. In the event that the employees disappear, or are pregnant and you fail to repatriate, your $5,000 deposit will be forfeited.
About renew the employees's passport, this depends on the nationality of yours. Embassy makes a rule that the employer needs to pay for all the fee relating to passport renewal.