When I applied at ASML they asked me: What if it looks like you will not be able to finish your work within the assigned time, what do you do?
I said: I would just work some more, if it doesn't happen very often, not a problem.
WRONG. Go to your project leader tell him: "I have time for either this or this, where should I put priority." We do not want overworked people.
ASML gave employees about 2 months salary as a bonus some time back, this is on top of a customary 13th month in December.