At this time, the option to split the payments monthly in QuickBooks Online is unavailable.
As a workaround, let’s go to your banking and split each transaction from there manually. Let me guide you:
1. From the left panel, click Banking.
2. In the For Review tab, select the transaction you’ve wanted to split.
3. Click the Split button.
4. Under ReceivedFrom, select the Payee, then enter the split amount.
5. Click Save and add.
After doing so, find the other transaction you’ve wanted to split and repeat the steps above.
I’ve attached screenshots below for your visual reference.
Also, I encourage sending feedback to our engineering team by going to the Gear icon, then selecting Feedback. This way, they can consider checking and working on the option to split the payments monthly.
If you have any other questions, feel free to comment below. We’re always here to help you.