Withdrawals are possible.
IB commissions are reflected in your IB account balance in the IB console (Partner Area).
You can submit a withdrawal request from your wallet and upon approval, the funds will be transferred to your designated bank account.
If you have a trading account, you can also use your commissions as margin by transferring funds to your trading account.
In order to withdraw, you need to register your bank account in advance. If you have not done so, please register your bank account information on your profile page.