If you'd like to automatically fund your account, you can enable Auto-Refill by clicking "Turn on Auto-Refill" on your Funding page. Auto-Refill ensures that your AngelList account maintains a minimum balance. Once you connect your bank account, you can set a minimum balance. Please note that Auto-Refill can only be enabled for US Bank accounts with ACH capabilities.
If your AngelList account balance falls below your set minimum balance, an ACH will be triggered from your linked ACH Bank Account. If you set a $5k minimum balance to maintain, the auto-refill ACH will also be for $5k.