You can see your current log limit and consolidated usage of all applications in the Team settings page, you can access it in the cog icon on the left hand side bar.
The next screen shows you the logs used today and yesterday, in comparison with your limit. If you are the owner of the team you can also change the plan to adapt to your needs.
This counter is reset every night at midnight UTC. If you reach your quota limit, Bugfender will use a token bucket filter to slow down acceptance of new logs to match the quota rate.