For calculating provisions on SAC contributions, the system carries out the following steps:

1. The function that calculates the Annual Extra Payment transfers the wage type (/S01) to the function responsible for calculating deductions and contributions.
2. On the basis of this transferred wage type, the function responsible for the calculation of deductions and contributions calculates the contributions appropriate for the SAC provisions at that time and transfers them to the function responsible for the SAC calculation.
3. This function then saves the wage types corresponding to the SAC provisions in the internal IT table, changing their name (for example, wage type /SC7 for contributions; wage type /SD7 for contribution differences).