If you’re working on the project based on the ‘Flat Project Amount’ billing method (read more about them here), it means that the project price is constant and it doesn’t depend on the rates and hours spent by your staff on this project.
You can invoice this amount in several stages.
Step 1. Choose the invoice with Flat Amount and click ‘Generate Invoice’:
Step 2. Enter the amount which should be invoiced and click ‘Generate’:
Next time when you will generate an invoice for this project you will be able to enter the remaining value until the full amount will be invoiced.
‘Flat Amount for Tasks’ billing method
This billing method is similar to a ‘Flat Project Amount’ billing method but the difference is that this method allows you to set a flat amount for each task.
Therefore, if you generate an invoice, you can also enter the needed amount which should be invoiced for every task.
For instance, in this invoice, you will also have a few individual tasks with their flat amounts: