At what point do they quit expecting you to show up for work?

I woke up this morning feeling very much like I do every weekday morning- full of loathe and contempt for my job. And just like every weekday morning, I spent 20 minutes, after the third and last time that I hit snooze on my alarm, recalculating the amount of sick leave I had left, mentally sifting through my unanswered emails from the past couple of weeks days, and visualizing my to do list and the incredibly important, life-changing tasks on it. *Deep Sigh*  Dammittahell! Work wins again :(.