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

Recurring:

You may schedule 2 automatic payments per month (bi-monthly). If you would like to set up bi-monthly payments, please review this article regarding the eligibility requirements.

Manual:

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

You can also make payments via paper check and US mail.