Yes, you can make your monthly payment in two installments, as long as the minimum monthly amount is satisfied by your due date. 

Recurring:

Your account must be current, and it is at least 15 days before your next due date, you can schedule two automatic recurring payments per month. Automatic recurring payments will occur on the same day every month. If you choose to set up bi-monthly payments, you will need to do so at least 15 days before your next due date.  Please allow 3 business days for changes to your recurring payments to take effect.

Manual:

If you are not eligible for automatic bi-monthly payments or you prefer to make manual ACH payments, you can make a split payment on your Upstart dashboard by scheduling 2 one time payments using the “Make a Payment” button. 

You can also make payments via paper check.