I'm quite confused upon the Resource Payment Rate

How is the standard rate being calculated? Is it by hours, or days? I am quite confused since I don’t see any option changing the rate type. Thanks!

Atomic time unit in GanttProject is day, so payment rate is per day.

It usually depends on the system or platform you’re using. In most cases, the standard rate is calculated by hours — that’s the default for many time-tracking or billing setups. However, some systems let you define it by days or even project-based rates, but that setting might be hidden under advanced options or account preferences. If you can’t find it, it’s worth checking the documentation or support section — they often explain how the rate calculation is structured.