Hi there, melanie15.

For now, there isn't a single report in QBO that will compare your time expenses and the income that were generated from them. Though, you can run the Sales by Product/Service Detail report. Then, compare it to the Time Activities By Customer Detail report. 

Here's how:

1. Look for Sales by Product/Service Detail in the Reports menu. 
2. Click Customize, then scroll-down to the Filter section.
3. Check the Product/Service box and select Hours or the service item that you're using for time activities.
4. Click Run Report.

Please add another reply below if you have other questions.