How do I split payouts between two bank accounts?

To add a bank account:

Go to Account Settings > Payment Methods.
Click "Add payout method."

To assign bank accounts to listings:

Go to Listings
Click "Edit" for the appropriate listing.
Click on "Management."
Select a primary payout method.
Select a secondary payout method. Assign a percentage for the secondary payout method. The remaining percentage is automatically applied to the primary payout method.