Since April 2016, employers of apprentices under the age of 25 no longer pay secondary Class 1 (employer) National Insurance contributions (NIC) on earnings up to the Upper Earnings Limit (currently £50,000), for those employees.
This is a 13.8% saving on everything the apprentice earns over £8,788 a year for the employers of apprentices.
Our National Insurance Breaks leaflet will help you understand how that will apply to your setting.