Shared Parental Leave (SPL) and Shared Parental Pay (ShPP) allow the birth parent (or adopting parent) to curtail the amount of Maternity Leave and Statutory Maternity Pay or Maternity Allowance (or Statutory Adoption Leave and Pay) that they would have been eligible for, and instead transfer that balance to the other parent. Up to 50 weeks of leave and up to 37 weeks of pay can be shared in this way.