Hi Zuhi,
Maintain following steps
1) Copy wage type from any standard one from Tcode OH11
2) Assign it with wagetype group for Recurring Payment
3) Change it's text in table V_512W_T
4) Change it's permissibility as per your PS & ESG
5) you an change it's characteristic from table V_512W_D as per your requirement
6) For posting you have to assing it with proper Symbolic Acc.
Thanks & Regards