You can withdraw all the funds available or only what you need. You can do this from the Finances section within your dashboard. To get to the FINANCES tab, log in to your rally and navigate to MY RALLYS (at the top right corner) and choose the rally you are leading. Make sure you have entered accurate screening information before initiating a withdrawal of funds.
When you initiate a withdrawal of funds, the deposit will take 3-6 business days to hit your account. Keep in mind that weekends and bank holidays can delay this by a few days.