You can choose to direct your staking rewards to any account you want to, and you can change your mind anytime.

In order to send your staking rewards to a different account, go to the Account Actions in the Staking section of Polkadot-JS UI. 

Click on the three dots next to your stash and then select "Change reward destination" from the menu. 

You can choose the following options: 

  1. Send your staking rewards to your stash and bond them, so your stash keeps growing and your rewards compound
  2. Send your staking rewards to your stash without bonding them, so they remain transferrable and you can send them out of your account anytime
  3. Send them to your controller account
  4. Send them to any other account you own and have listed on your accounts page

Once you've made your selection, click on Set Rewards Destination and confirm the transaction.