This interest compensation is paid in the first half of the month, for the previous month. For example, the interest compensation for November would be paid in the first half of December. The amount will be added to your cash balance.
All you need to do to earn interest compensation is deposit your money with BUX. No action needed once the deposit is made.
Your deposit with BUX is held at ABN Clearing Bank and is protected up to €100,000 under the conditions of the Dutch Deposit Guarantee Scheme (DGS).
For more details on how the interest is calculated and added to uninvested cash please read here: https://getbux.com/blog/interest-on-cash/