The fees that will be charged are displayed in the portfolios details page when you are deciding to invest in it. These are charged quarterly and will be deducted automatically from your SAXO cash account. Do note that units will be priced on a historical basis.
In the event where you have insufficient funds in your SAXO cash account, a sell order will be put in place for the fees payment. Please ensure that you have sufficient funds in your SAXO cash account if you want to avoid this scenario.