IANA Financial person, but... it does go on the books as a debt. I'd be highly interested in someone in the know putting some numbers up, but at my office I know of many people who have several months of vacation saved up (because seemingly people tend to under-use their vacation time). If that company is looking to get bought out, it must be relevant to at least some extent.
At my previous company, they specifically created a policy of no more than five days of rollover vacation from year to year specifically because of an on-the-books obligation of a couple million dollars (500+ employees) due to accrued vacation. Later, they changed that policy to NO rollover without VP level approval (e.g. honeymoons). In states like California that have strong employee laws they had to force all California based employees to burn down their accrued vacation every three months. Quasi-ethical and possibly borderline legal but that is what you have to do when employees hoard vacation under the mattress.
