How do I set up reoccurring monthly expenses?

Welcome to the Community, @david-welch.

Setting up a recurring transaction in QuickBooks Online is fast and easy. Since you're going to create it for an expense, you can set up a recurring bill.

Here's how:

1. If you already have an existing bill, you can locate and open it. Otherwise, create a new one by clicking the + New tab.
2. Click Bill under Vendors.
3. Enter the data that you want to include on a recurring basis such as vendor, account or item details, description, amount, and others.
4. Go the bottom of the bill and click Make recurring.
5. QuickBooks Online creates a copy of the bill and adds a "Recurring Bill" section so you can set the recurring bill's preferences.
6. Enter a template name.
7. Select Monthly and specify the interval and start date of the recurring transaction.
8. From the End drop-down, specify if you want it to end that transaction after a number of occurrences, by a set end date, or to not end recurring.
9. Save Template when done.

You can also check this link for other information: How to set up a recurring bill.

If you want to set up recurring for your invoices and sales receipts, you can refer to this helpful guide: Set up a recurring sales receipt.

I'll be around if you need anything else. Your success is my number 1 priority. Take care and have a nice day!