When creating / editing a project, you can choose different methods for invoicing your project via 'Invoicing' tab. 

Specify different hourly rates per task (for example: Marketing = €90, Analysis = €100, Development = €120). When you have checked this choice, you will see an extra column when you add your activities where you can add hourly rates.

Specify different hourly rates per employee (for example: Fabienne = €100, Jan = €110 ). When you have checked this choice, when you add your employees (team) you will see an extra column where you can enter this. 

Specify a fixed hourly rate for each employee and activity. When you have checked this, a new field appears under this choice where you can specify the project hourly rate. 

Use the standard hourly rate for the customer (for each employee and activity). You can specify this when creating / editing the client. Go to Manage-> Clients.

Use a fixed rate (regardless of how many hours) for the entire project (for example: € 15,000). When you have checked this, a new field appears under this choice where you can specify the rate. 

Use a fixed rate (regardless of how many hours) per task (for example: Marketing = € 5,000, Analysis = € 10,000). When you have checked this choice, when you add your employees (team) you will see an extra column where you can enter this.

Use a subscription if you want to invoice the client a fixed amount every period (this can be per week, month, quarter or year). Also view the status of your subscription exactly in your project dashboard (if you have spent more / less than invoiced).