Entry requirements. You do not need any formal qualifications to become a childminder but you do need to be aged 18 or over. You also need to be registered with Ofsted if you intend to care for a child or children under the age of eight for more than two hours a day.ou may be able to get help with the costs of setting up your childminding business by applying for a childminder start-up grant if this is available in your area. To apply for a grant, contact the early years team at your local council. Approval of your registration to work as a childminder can take up to three months.