Recurring Invoice to apply payments received against existing balance

Welcome to the Community, FBCOffice. I appreciate your detailed information.

With recurring invoices, customers can only make one online payment of their full amount. This means if you were to use recurring invoices, you'd have to send multiple recurring invoices with each scheduled payment amount.

Another solution is to utilize your progress invoicing feature. With this, you can invoice customers for partial payments, instead of asking them for the full payment at the beginning of your project.

Here's how to get started with progress invoicing:
 

1. Use the Gear () icon, then go to Account and settings.
2. Access your Sales tab.
3. In the Progress Invoicing section, click Edit.
4. Turn on your Create multiple partial invoices from a single estimate option.
5. From the Update your invoice template? window, hit Update.
6. Select Save, then Done.

Now you'll have a default progress invoicing template which can be used to create progress invoices. Next, you can create an estimate:
 

1. Use the + New button, then choose Estimate.
2. Pick a customer and enter any necessary details.
3. Select Save and close.

Now you're prepared to create progress invoices from your estimate.

I've also included a detailed resource about working with recurring transactions which may come in handy moving forward: Create recurring transactions

Please don't hesitate to send a reply if there's any additional questions. Have an awesome Friday!