tbh there isnt like one single hard limit across all colleges. from what i've seen, it really depends on the professor or even the department. some profs freak out at anything over 15-20% even if its just citations, others are cool as long as youre not directly copy-pasting. the key is usually understanding *why* the score is high, not just the number itself. like proper citations will show up but its not plagiarism. hope that helps.