My late policy, across the board, for all assignments: half a letter grade deduction for every day it’s late. Here’s my reasoning: it’s something I feel comfortable drawing a hard line on for all students, good or bad, rude or nice. It helps me not to play favorites.
It honestly doesn’t affect (too much) the students who make honest mistakes — you know, the ones you like and are good students and always make deadlines, so you’d otherwise want to make an exception?
And for the students you do have problems with — maybe they’re a little unsavory or are friendly but somehow always seem to leave their homework in their lockers but suddenly can’t find it when you send them to their lockers to look? It adds up, over time.
What’s your policy on accepting late work? How do you keep track?