Yes. Queued tasks count toward your concurrency limit until they finish or are cancelled, and so does a task in task_error status, which isn't final.
The limit: with a balance of $250 or less, you can run as many tasks at once as 10% of your balance, minimum 1 ($50 allows 5, $250 allows 25). Above $250 there's no limit. It's recalculated at every run.
At the limit: a new run isn't queued. It's rejected with code 96 (
You have reached your concurrent task limit...), and no task is created.To run more: wait for a task to finish, stop one with Kill Task (x icon) in Task History, or add credit. The plans offered at the limit only add credit: the limit depends on your balance, not the plan.
In a team: it uses the team wallet's balance and counts all members' team tasks.