If you have a BUX Plus or BUX Prime account, Interest is paid retrospectively, within the first half of the month. For example, the interest for January would be paid in the first half of February. The amount will be added to your cash balance.
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). You can find more information here:
For more details on how the interest is calculated and added to uninvested cash please read here: https://getbux.com/blog/interest-on-cash/