Hi @slimanepro -- there is no exact way to know because it will all depend on how much people bid! (It will fluctuate ever round). With my service you will get 90% on your steem power -- (for example) if 1,000 SP Delegated by you equaled $1.00 in Steem Dollars Every day in rewards, you would get $.90 of SBD and $.10 would go to running the bot and services (most services have maximum of 90-95%, while other services only give you 50-75%). However, since my service also has my own SP delegated and no RIO cap, you could earn even more for delegating... again it just all depends on who votes and how much. You can always try and if the earns are now what you expect, you can always undelegate and get your voting power back at anytime!