If you do not have an existing balance in your KDI Invest account, the change would be immediately upon completion of the steps as mentioned in this question:
“Can I switch my risk profile for KDI Invest and how to make the switch?”
However, if there is an existing amount in your KDI Invest account, then it will require up to 7 working days for the change to be in effect after completion of the steps as mentioned in this question:
“Can I switch my risk profile for KDI Invest and how to make the switch?”